Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/concurrentMark.cpp @ 6220:3a431b605145
Merge
| author | jmasa |
|---|---|
| date | Mon, 16 Jul 2012 13:00:26 -0700 |
| parents | d2a62e0f25eb 922993931b3d |
| children | a2f7274eb6ef |
| rev | line source |
|---|---|
| 342 | 1 /* |
|
4783
023652e49ac0
7121496: G1: do the per-region evacuation failure handling work in parallel
johnc
parents:
4735
diff
changeset
|
2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
| 342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1547
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1547
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1547
diff
changeset
|
21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "classfile/symbolTable.hpp" | |
| 3771 | 27 #include "gc_implementation/g1/concurrentMark.inline.hpp" |
| 1972 | 28 #include "gc_implementation/g1/concurrentMarkThread.inline.hpp" |
| 29 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" | |
| 30 #include "gc_implementation/g1/g1CollectorPolicy.hpp" | |
|
3914
20213c8a3c40
7050392: G1: Introduce flag to generate a log of the G1 ergonomic decisions
tonyp
parents:
3867
diff
changeset
|
31 #include "gc_implementation/g1/g1ErgoVerbose.hpp" |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5988
diff
changeset
|
32 #include "gc_implementation/g1/g1Log.hpp" |
| 3771 | 33 #include "gc_implementation/g1/g1OopClosures.inline.hpp" |
| 1972 | 34 #include "gc_implementation/g1/g1RemSet.hpp" |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
35 #include "gc_implementation/g1/heapRegion.inline.hpp" |
| 1972 | 36 #include "gc_implementation/g1/heapRegionRemSet.hpp" |
| 37 #include "gc_implementation/g1/heapRegionSeq.inline.hpp" | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2037
diff
changeset
|
38 #include "gc_implementation/shared/vmGCOperations.hpp" |
| 1972 | 39 #include "memory/genOopClosures.inline.hpp" |
| 40 #include "memory/referencePolicy.hpp" | |
| 41 #include "memory/resourceArea.hpp" | |
| 42 #include "oops/oop.inline.hpp" | |
| 43 #include "runtime/handles.inline.hpp" | |
| 44 #include "runtime/java.hpp" | |
| 6197 | 45 #include "services/memTracker.hpp" |
| 342 | 46 |
|
4828
851b58c26def
7130334: G1: Change comments and error messages that refer to CMS in g1/concurrentMark.cpp/hpp
brutisso
parents:
4827
diff
changeset
|
47 // Concurrent marking bit map wrapper |
| 342 | 48 |
|
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
49 CMBitMapRO::CMBitMapRO(ReservedSpace rs, int shifter) : |
| 342 | 50 _bm((uintptr_t*)NULL,0), |
| 51 _shifter(shifter) { | |
| 52 _bmStartWord = (HeapWord*)(rs.base()); | |
| 53 _bmWordSize = rs.size()/HeapWordSize; // rs.size() is in bytes | |
| 54 ReservedSpace brs(ReservedSpace::allocation_align_size_up( | |
| 55 (_bmWordSize >> (_shifter + LogBitsPerByte)) + 1)); | |
| 56 | |
| 6197 | 57 MemTracker::record_virtual_memory_type((address)brs.base(), mtGC); |
| 58 | |
|
4828
851b58c26def
7130334: G1: Change comments and error messages that refer to CMS in g1/concurrentMark.cpp/hpp
brutisso
parents:
4827
diff
changeset
|
59 guarantee(brs.is_reserved(), "couldn't allocate concurrent marking bit map"); |
| 342 | 60 // For now we'll just commit all of the bit map up fromt. |
| 61 // Later on we'll try to be more parsimonious with swap. | |
| 62 guarantee(_virtual_space.initialize(brs, brs.size()), | |
|
4828
851b58c26def
7130334: G1: Change comments and error messages that refer to CMS in g1/concurrentMark.cpp/hpp
brutisso
parents:
4827
diff
changeset
|
63 "couldn't reseve backing store for concurrent marking bit map"); |
| 342 | 64 assert(_virtual_space.committed_size() == brs.size(), |
|
4828
851b58c26def
7130334: G1: Change comments and error messages that refer to CMS in g1/concurrentMark.cpp/hpp
brutisso
parents:
4827
diff
changeset
|
65 "didn't reserve backing store for all of concurrent marking bit map?"); |
| 342 | 66 _bm.set_map((uintptr_t*)_virtual_space.low()); |
| 67 assert(_virtual_space.committed_size() << (_shifter + LogBitsPerByte) >= | |
| 68 _bmWordSize, "inconsistency in bit map sizing"); | |
| 69 _bm.set_size(_bmWordSize >> _shifter); | |
| 70 } | |
| 71 | |
| 72 HeapWord* CMBitMapRO::getNextMarkedWordAddress(HeapWord* addr, | |
| 73 HeapWord* limit) const { | |
| 74 // First we must round addr *up* to a possible object boundary. | |
| 75 addr = (HeapWord*)align_size_up((intptr_t)addr, | |
| 76 HeapWordSize << _shifter); | |
| 77 size_t addrOffset = heapWordToOffset(addr); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
78 if (limit == NULL) { |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
79 limit = _bmStartWord + _bmWordSize; |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
80 } |
| 342 | 81 size_t limitOffset = heapWordToOffset(limit); |
| 82 size_t nextOffset = _bm.get_next_one_offset(addrOffset, limitOffset); | |
| 83 HeapWord* nextAddr = offsetToHeapWord(nextOffset); | |
| 84 assert(nextAddr >= addr, "get_next_one postcondition"); | |
| 85 assert(nextAddr == limit || isMarked(nextAddr), | |
| 86 "get_next_one postcondition"); | |
| 87 return nextAddr; | |
| 88 } | |
| 89 | |
| 90 HeapWord* CMBitMapRO::getNextUnmarkedWordAddress(HeapWord* addr, | |
| 91 HeapWord* limit) const { | |
| 92 size_t addrOffset = heapWordToOffset(addr); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
93 if (limit == NULL) { |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
94 limit = _bmStartWord + _bmWordSize; |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
95 } |
| 342 | 96 size_t limitOffset = heapWordToOffset(limit); |
| 97 size_t nextOffset = _bm.get_next_zero_offset(addrOffset, limitOffset); | |
| 98 HeapWord* nextAddr = offsetToHeapWord(nextOffset); | |
| 99 assert(nextAddr >= addr, "get_next_one postcondition"); | |
| 100 assert(nextAddr == limit || !isMarked(nextAddr), | |
| 101 "get_next_one postcondition"); | |
| 102 return nextAddr; | |
| 103 } | |
| 104 | |
| 105 int CMBitMapRO::heapWordDiffToOffsetDiff(size_t diff) const { | |
| 106 assert((diff & ((1 << _shifter) - 1)) == 0, "argument check"); | |
| 107 return (int) (diff >> _shifter); | |
| 108 } | |
| 109 | |
| 110 #ifndef PRODUCT | |
| 111 bool CMBitMapRO::covers(ReservedSpace rs) const { | |
| 112 // assert(_bm.map() == _virtual_space.low(), "map inconsistency"); | |
|
645
c3a720eefe82
6816308: Changes to allow builds with latest Windows SDK 6.1 on 64bit Windows 2003
kvn
parents:
619
diff
changeset
|
113 assert(((size_t)_bm.size() * (size_t)(1 << _shifter)) == _bmWordSize, |
| 342 | 114 "size inconsistency"); |
| 115 return _bmStartWord == (HeapWord*)(rs.base()) && | |
| 116 _bmWordSize == rs.size()>>LogHeapWordSize; | |
| 117 } | |
| 118 #endif | |
| 119 | |
| 120 void CMBitMap::clearAll() { | |
| 121 _bm.clear(); | |
| 122 return; | |
| 123 } | |
| 124 | |
| 125 void CMBitMap::markRange(MemRegion mr) { | |
| 126 mr.intersection(MemRegion(_bmStartWord, _bmWordSize)); | |
| 127 assert(!mr.is_empty(), "unexpected empty region"); | |
| 128 assert((offsetToHeapWord(heapWordToOffset(mr.end())) == | |
| 129 ((HeapWord *) mr.end())), | |
| 130 "markRange memory region end is not card aligned"); | |
| 131 // convert address range into offset range | |
| 132 _bm.at_put_range(heapWordToOffset(mr.start()), | |
| 133 heapWordToOffset(mr.end()), true); | |
| 134 } | |
| 135 | |
| 136 void CMBitMap::clearRange(MemRegion mr) { | |
| 137 mr.intersection(MemRegion(_bmStartWord, _bmWordSize)); | |
| 138 assert(!mr.is_empty(), "unexpected empty region"); | |
| 139 // convert address range into offset range | |
| 140 _bm.at_put_range(heapWordToOffset(mr.start()), | |
| 141 heapWordToOffset(mr.end()), false); | |
| 142 } | |
| 143 | |
| 144 MemRegion CMBitMap::getAndClearMarkedRegion(HeapWord* addr, | |
| 145 HeapWord* end_addr) { | |
| 146 HeapWord* start = getNextMarkedWordAddress(addr); | |
| 147 start = MIN2(start, end_addr); | |
| 148 HeapWord* end = getNextUnmarkedWordAddress(start); | |
| 149 end = MIN2(end, end_addr); | |
| 150 assert(start <= end, "Consistency check"); | |
| 151 MemRegion mr(start, end); | |
| 152 if (!mr.is_empty()) { | |
| 153 clearRange(mr); | |
| 154 } | |
| 155 return mr; | |
| 156 } | |
| 157 | |
| 158 CMMarkStack::CMMarkStack(ConcurrentMark* cm) : | |
| 159 _base(NULL), _cm(cm) | |
| 160 #ifdef ASSERT | |
| 161 , _drain_in_progress(false) | |
| 162 , _drain_in_progress_yields(false) | |
| 163 #endif | |
| 164 {} | |
| 165 | |
| 166 void CMMarkStack::allocate(size_t size) { | |
| 6197 | 167 _base = NEW_C_HEAP_ARRAY(oop, size, mtGC); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
168 if (_base == NULL) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
169 vm_exit_during_initialization("Failed to allocate CM region mark stack"); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
170 } |
| 342 | 171 _index = 0; |
| 172 _capacity = (jint) size; | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
173 _saved_index = -1; |
| 342 | 174 NOT_PRODUCT(_max_depth = 0); |
| 175 } | |
| 176 | |
| 177 CMMarkStack::~CMMarkStack() { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
178 if (_base != NULL) { |
| 6197 | 179 FREE_C_HEAP_ARRAY(oop, _base, mtGC); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
180 } |
| 342 | 181 } |
| 182 | |
| 183 void CMMarkStack::par_push(oop ptr) { | |
| 184 while (true) { | |
| 185 if (isFull()) { | |
| 186 _overflow = true; | |
| 187 return; | |
| 188 } | |
| 189 // Otherwise... | |
| 190 jint index = _index; | |
| 191 jint next_index = index+1; | |
| 192 jint res = Atomic::cmpxchg(next_index, &_index, index); | |
| 193 if (res == index) { | |
| 194 _base[index] = ptr; | |
| 195 // Note that we don't maintain this atomically. We could, but it | |
| 196 // doesn't seem necessary. | |
| 197 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index)); | |
| 198 return; | |
| 199 } | |
| 200 // Otherwise, we need to try again. | |
| 201 } | |
| 202 } | |
| 203 | |
| 204 void CMMarkStack::par_adjoin_arr(oop* ptr_arr, int n) { | |
| 205 while (true) { | |
| 206 if (isFull()) { | |
| 207 _overflow = true; | |
| 208 return; | |
| 209 } | |
| 210 // Otherwise... | |
| 211 jint index = _index; | |
| 212 jint next_index = index + n; | |
| 213 if (next_index > _capacity) { | |
| 214 _overflow = true; | |
| 215 return; | |
| 216 } | |
| 217 jint res = Atomic::cmpxchg(next_index, &_index, index); | |
| 218 if (res == index) { | |
| 219 for (int i = 0; i < n; i++) { | |
| 220 int ind = index + i; | |
| 221 assert(ind < _capacity, "By overflow test above."); | |
| 222 _base[ind] = ptr_arr[i]; | |
| 223 } | |
| 224 NOT_PRODUCT(_max_depth = MAX2(_max_depth, next_index)); | |
| 225 return; | |
| 226 } | |
| 227 // Otherwise, we need to try again. | |
| 228 } | |
| 229 } | |
| 230 | |
| 231 | |
| 232 void CMMarkStack::par_push_arr(oop* ptr_arr, int n) { | |
| 233 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
| 234 jint start = _index; | |
| 235 jint next_index = start + n; | |
| 236 if (next_index > _capacity) { | |
| 237 _overflow = true; | |
| 238 return; | |
| 239 } | |
| 240 // Otherwise. | |
| 241 _index = next_index; | |
| 242 for (int i = 0; i < n; i++) { | |
| 243 int ind = start + i; | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
244 assert(ind < _capacity, "By overflow test above."); |
| 342 | 245 _base[ind] = ptr_arr[i]; |
| 246 } | |
| 247 } | |
| 248 | |
| 249 | |
| 250 bool CMMarkStack::par_pop_arr(oop* ptr_arr, int max, int* n) { | |
| 251 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
| 252 jint index = _index; | |
| 253 if (index == 0) { | |
| 254 *n = 0; | |
| 255 return false; | |
| 256 } else { | |
| 257 int k = MIN2(max, index); | |
| 258 jint new_ind = index - k; | |
| 259 for (int j = 0; j < k; j++) { | |
| 260 ptr_arr[j] = _base[new_ind + j]; | |
| 261 } | |
| 262 _index = new_ind; | |
| 263 *n = k; | |
| 264 return true; | |
| 265 } | |
| 266 } | |
| 267 | |
| 268 template<class OopClosureClass> | |
| 269 bool CMMarkStack::drain(OopClosureClass* cl, CMBitMap* bm, bool yield_after) { | |
| 270 assert(!_drain_in_progress || !_drain_in_progress_yields || yield_after | |
| 271 || SafepointSynchronize::is_at_safepoint(), | |
| 272 "Drain recursion must be yield-safe."); | |
| 273 bool res = true; | |
| 274 debug_only(_drain_in_progress = true); | |
| 275 debug_only(_drain_in_progress_yields = yield_after); | |
| 276 while (!isEmpty()) { | |
| 277 oop newOop = pop(); | |
| 278 assert(G1CollectedHeap::heap()->is_in_reserved(newOop), "Bad pop"); | |
| 279 assert(newOop->is_oop(), "Expected an oop"); | |
| 280 assert(bm == NULL || bm->isMarked((HeapWord*)newOop), | |
| 281 "only grey objects on this stack"); | |
| 282 newOop->oop_iterate(cl); | |
| 283 if (yield_after && _cm->do_yield_check()) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
284 res = false; |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
285 break; |
| 342 | 286 } |
| 287 } | |
| 288 debug_only(_drain_in_progress = false); | |
| 289 return res; | |
| 290 } | |
| 291 | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
292 void CMMarkStack::note_start_of_gc() { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
293 assert(_saved_index == -1, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
294 "note_start_of_gc()/end_of_gc() bracketed incorrectly"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
295 _saved_index = _index; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
296 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
297 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
298 void CMMarkStack::note_end_of_gc() { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
299 // This is intentionally a guarantee, instead of an assert. If we |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
300 // accidentally add something to the mark stack during GC, it |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
301 // will be a correctness issue so it's better if we crash. we'll |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
302 // only check this once per GC anyway, so it won't be a performance |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
303 // issue in any way. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
304 guarantee(_saved_index == _index, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
305 err_msg("saved index: %d index: %d", _saved_index, _index)); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
306 _saved_index = -1; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
307 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
308 |
| 342 | 309 void CMMarkStack::oops_do(OopClosure* f) { |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
310 assert(_saved_index == _index, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
311 err_msg("saved index: %d index: %d", _saved_index, _index)); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
312 for (int i = 0; i < _index; i += 1) { |
| 342 | 313 f->do_oop(&_base[i]); |
| 314 } | |
| 315 } | |
| 316 | |
| 317 bool ConcurrentMark::not_yet_marked(oop obj) const { | |
| 318 return (_g1h->is_obj_ill(obj) | |
| 319 || (_g1h->is_in_permanent(obj) | |
| 320 && !nextMarkBitMap()->isMarked((HeapWord*)obj))); | |
| 321 } | |
| 322 | |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
323 CMRootRegions::CMRootRegions() : |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
324 _young_list(NULL), _cm(NULL), _scan_in_progress(false), |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
325 _should_abort(false), _next_survivor(NULL) { } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
326 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
327 void CMRootRegions::init(G1CollectedHeap* g1h, ConcurrentMark* cm) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
328 _young_list = g1h->young_list(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
329 _cm = cm; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
330 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
331 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
332 void CMRootRegions::prepare_for_scan() { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
333 assert(!scan_in_progress(), "pre-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
334 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
335 // Currently, only survivors can be root regions. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
336 assert(_next_survivor == NULL, "pre-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
337 _next_survivor = _young_list->first_survivor_region(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
338 _scan_in_progress = (_next_survivor != NULL); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
339 _should_abort = false; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
340 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
341 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
342 HeapRegion* CMRootRegions::claim_next() { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
343 if (_should_abort) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
344 // If someone has set the should_abort flag, we return NULL to |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
345 // force the caller to bail out of their loop. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
346 return NULL; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
347 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
348 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
349 // Currently, only survivors can be root regions. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
350 HeapRegion* res = _next_survivor; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
351 if (res != NULL) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
352 MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
353 // Read it again in case it changed while we were waiting for the lock. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
354 res = _next_survivor; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
355 if (res != NULL) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
356 if (res == _young_list->last_survivor_region()) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
357 // We just claimed the last survivor so store NULL to indicate |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
358 // that we're done. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
359 _next_survivor = NULL; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
360 } else { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
361 _next_survivor = res->get_next_young_region(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
362 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
363 } else { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
364 // Someone else claimed the last survivor while we were trying |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
365 // to take the lock so nothing else to do. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
366 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
367 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
368 assert(res == NULL || res->is_survivor(), "post-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
369 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
370 return res; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
371 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
372 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
373 void CMRootRegions::scan_finished() { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
374 assert(scan_in_progress(), "pre-condition"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
375 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
376 // Currently, only survivors can be root regions. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
377 if (!_should_abort) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
378 assert(_next_survivor == NULL, "we should have claimed all survivors"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
379 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
380 _next_survivor = NULL; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
381 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
382 { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
383 MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
384 _scan_in_progress = false; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
385 RootRegionScan_lock->notify_all(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
386 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
387 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
388 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
389 bool CMRootRegions::wait_until_scan_finished() { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
390 if (!scan_in_progress()) return false; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
391 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
392 { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
393 MutexLockerEx x(RootRegionScan_lock, Mutex::_no_safepoint_check_flag); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
394 while (scan_in_progress()) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
395 RootRegionScan_lock->wait(Mutex::_no_safepoint_check_flag); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
396 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
397 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
398 return true; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
399 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
400 |
| 342 | 401 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away |
| 402 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list | |
| 403 #endif // _MSC_VER | |
| 404 | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
405 uint ConcurrentMark::scale_parallel_threads(uint n_par_threads) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
406 return MAX2((n_par_threads + 2) / 4, 1U); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
407 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
408 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
409 ConcurrentMark::ConcurrentMark(ReservedSpace rs, uint max_regions) : |
| 342 | 410 _markBitMap1(rs, MinObjAlignment - 1), |
| 411 _markBitMap2(rs, MinObjAlignment - 1), | |
| 412 | |
| 413 _parallel_marking_threads(0), | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
414 _max_parallel_marking_threads(0), |
| 342 | 415 _sleep_factor(0.0), |
| 416 _marking_task_overhead(1.0), | |
| 417 _cleanup_sleep_factor(0.0), | |
| 418 _cleanup_task_overhead(1.0), | |
| 2152 | 419 _cleanup_list("Cleanup List"), |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
420 _region_bm((BitMap::idx_t) max_regions, false /* in_resource_area*/), |
| 342 | 421 _card_bm((rs.size() + CardTableModRefBS::card_size - 1) >> |
| 422 CardTableModRefBS::card_shift, | |
| 423 false /* in_resource_area*/), | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
424 |
| 342 | 425 _prevMarkBitMap(&_markBitMap1), |
| 426 _nextMarkBitMap(&_markBitMap2), | |
| 427 | |
| 428 _markStack(this), | |
| 429 // _finger set in set_non_marking_state | |
| 430 | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
431 _max_task_num(MAX2((uint)ParallelGCThreads, 1U)), |
| 342 | 432 // _active_tasks set in set_non_marking_state |
| 433 // _tasks set inside the constructor | |
| 434 _task_queues(new CMTaskQueueSet((int) _max_task_num)), | |
| 435 _terminator(ParallelTaskTerminator((int) _max_task_num, _task_queues)), | |
| 436 | |
| 437 _has_overflown(false), | |
| 438 _concurrent(false), | |
|
619
7ea5ca260b28
6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents:
470
diff
changeset
|
439 _has_aborted(false), |
|
7ea5ca260b28
6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents:
470
diff
changeset
|
440 _restart_for_overflow(false), |
|
7ea5ca260b28
6814467: G1: small fixes related to concurrent marking verboseness
tonyp
parents:
470
diff
changeset
|
441 _concurrent_marking_in_progress(false), |
| 342 | 442 |
| 443 // _verbose_level set below | |
| 444 | |
| 445 _init_times(), | |
| 446 _remark_times(), _remark_mark_times(), _remark_weak_ref_times(), | |
| 447 _cleanup_times(), | |
| 448 _total_counting_time(0.0), | |
| 449 _total_rs_scrub_time(0.0), | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
450 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
451 _parallel_workers(NULL), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
452 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
453 _count_card_bitmaps(NULL), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
454 _count_marked_bytes(NULL) { |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
455 CMVerboseLevel verbose_level = (CMVerboseLevel) G1MarkingVerboseLevel; |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
456 if (verbose_level < no_verbose) { |
| 342 | 457 verbose_level = no_verbose; |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
458 } |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
459 if (verbose_level > high_verbose) { |
| 342 | 460 verbose_level = high_verbose; |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
461 } |
| 342 | 462 _verbose_level = verbose_level; |
| 463 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
464 if (verbose_low()) { |
| 342 | 465 gclog_or_tty->print_cr("[global] init, heap start = "PTR_FORMAT", " |
| 466 "heap end = "PTR_FORMAT, _heap_start, _heap_end); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
467 } |
| 342 | 468 |
| 1284 | 469 _markStack.allocate(MarkStackSize); |
| 342 | 470 |
| 471 // Create & start a ConcurrentMark thread. | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
472 _cmThread = new ConcurrentMarkThread(this); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
473 assert(cmThread() != NULL, "CM Thread should have been created"); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
474 assert(cmThread()->cm() != NULL, "CM Thread should refer to this cm"); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
475 |
| 342 | 476 _g1h = G1CollectedHeap::heap(); |
| 477 assert(CGC_lock != NULL, "Where's the CGC_lock?"); | |
| 478 assert(_markBitMap1.covers(rs), "_markBitMap1 inconsistency"); | |
| 479 assert(_markBitMap2.covers(rs), "_markBitMap2 inconsistency"); | |
| 480 | |
| 481 SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set(); | |
| 1282 | 482 satb_qs.set_buffer_size(G1SATBBufferSize); |
| 342 | 483 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
484 _root_regions.init(_g1h, this); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
485 |
| 6197 | 486 _tasks = NEW_C_HEAP_ARRAY(CMTask*, _max_task_num, mtGC); |
| 487 _accum_task_vtime = NEW_C_HEAP_ARRAY(double, _max_task_num, mtGC); | |
| 488 | |
| 489 _count_card_bitmaps = NEW_C_HEAP_ARRAY(BitMap, _max_task_num, mtGC); | |
| 490 _count_marked_bytes = NEW_C_HEAP_ARRAY(size_t*, _max_task_num, mtGC); | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
491 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
492 BitMap::idx_t card_bm_size = _card_bm.size(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
493 |
| 342 | 494 // so that the assertion in MarkingTaskQueue::task_queue doesn't fail |
| 495 _active_tasks = _max_task_num; | |
| 496 for (int i = 0; i < (int) _max_task_num; ++i) { | |
| 497 CMTaskQueue* task_queue = new CMTaskQueue(); | |
| 498 task_queue->initialize(); | |
| 499 _task_queues->register_queue(i, task_queue); | |
| 500 | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
501 _count_card_bitmaps[i] = BitMap(card_bm_size, false); |
| 6197 | 502 _count_marked_bytes[i] = NEW_C_HEAP_ARRAY(size_t, (size_t) max_regions, mtGC); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
503 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
504 _tasks[i] = new CMTask(i, this, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
505 _count_marked_bytes[i], |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
506 &_count_card_bitmaps[i], |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
507 task_queue, _task_queues); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
508 |
| 342 | 509 _accum_task_vtime[i] = 0.0; |
| 510 } | |
| 511 | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
512 // Calculate the card number for the bottom of the heap. Used |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
513 // in biasing indexes into the accounting card bitmaps. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
514 _heap_bottom_card_num = |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
515 intptr_t(uintptr_t(_g1h->reserved_region().start()) >> |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
516 CardTableModRefBS::card_shift); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
517 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
518 // Clear all the liveness counting data |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
519 clear_all_count_data(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
520 |
| 1284 | 521 if (ConcGCThreads > ParallelGCThreads) { |
| 522 vm_exit_during_initialization("Can't have more ConcGCThreads " | |
| 342 | 523 "than ParallelGCThreads."); |
| 524 } | |
| 525 if (ParallelGCThreads == 0) { | |
| 526 // if we are not running with any parallel GC threads we will not | |
| 527 // spawn any marking threads either | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
528 _parallel_marking_threads = 0; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
529 _max_parallel_marking_threads = 0; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
530 _sleep_factor = 0.0; |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
531 _marking_task_overhead = 1.0; |
| 342 | 532 } else { |
| 1284 | 533 if (ConcGCThreads > 0) { |
| 534 // notice that ConcGCThreads overwrites G1MarkingOverheadPercent | |
| 342 | 535 // if both are set |
| 536 | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
537 _parallel_marking_threads = (uint) ConcGCThreads; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
538 _max_parallel_marking_threads = _parallel_marking_threads; |
| 342 | 539 _sleep_factor = 0.0; |
| 540 _marking_task_overhead = 1.0; | |
| 751 | 541 } else if (G1MarkingOverheadPercent > 0) { |
| 342 | 542 // we will calculate the number of parallel marking threads |
| 543 // based on a target overhead with respect to the soft real-time | |
| 544 // goal | |
| 545 | |
| 751 | 546 double marking_overhead = (double) G1MarkingOverheadPercent / 100.0; |
| 342 | 547 double overall_cm_overhead = |
| 751 | 548 (double) MaxGCPauseMillis * marking_overhead / |
| 549 (double) GCPauseIntervalMillis; | |
| 342 | 550 double cpu_ratio = 1.0 / (double) os::processor_count(); |
| 551 double marking_thread_num = ceil(overall_cm_overhead / cpu_ratio); | |
| 552 double marking_task_overhead = | |
| 553 overall_cm_overhead / marking_thread_num * | |
| 554 (double) os::processor_count(); | |
| 555 double sleep_factor = | |
| 556 (1.0 - marking_task_overhead) / marking_task_overhead; | |
| 557 | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
558 _parallel_marking_threads = (uint) marking_thread_num; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
559 _max_parallel_marking_threads = _parallel_marking_threads; |
| 342 | 560 _sleep_factor = sleep_factor; |
| 561 _marking_task_overhead = marking_task_overhead; | |
| 562 } else { | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
563 _parallel_marking_threads = scale_parallel_threads((uint)ParallelGCThreads); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
564 _max_parallel_marking_threads = _parallel_marking_threads; |
| 342 | 565 _sleep_factor = 0.0; |
| 566 _marking_task_overhead = 1.0; | |
| 567 } | |
| 568 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
569 if (parallel_marking_threads() > 1) { |
| 342 | 570 _cleanup_task_overhead = 1.0; |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
571 } else { |
| 342 | 572 _cleanup_task_overhead = marking_task_overhead(); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
573 } |
| 342 | 574 _cleanup_sleep_factor = |
| 575 (1.0 - cleanup_task_overhead()) / cleanup_task_overhead(); | |
| 576 | |
| 577 #if 0 | |
| 578 gclog_or_tty->print_cr("Marking Threads %d", parallel_marking_threads()); | |
| 579 gclog_or_tty->print_cr("CM Marking Task Overhead %1.4lf", marking_task_overhead()); | |
| 580 gclog_or_tty->print_cr("CM Sleep Factor %1.4lf", sleep_factor()); | |
| 581 gclog_or_tty->print_cr("CL Marking Task Overhead %1.4lf", cleanup_task_overhead()); | |
| 582 gclog_or_tty->print_cr("CL Sleep Factor %1.4lf", cleanup_sleep_factor()); | |
| 583 #endif | |
| 584 | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
585 guarantee(parallel_marking_threads() > 0, "peace of mind"); |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
586 _parallel_workers = new FlexibleWorkGang("G1 Parallel Marking Threads", |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
587 _max_parallel_marking_threads, false, true); |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
588 if (_parallel_workers == NULL) { |
| 342 | 589 vm_exit_during_initialization("Failed necessary allocation."); |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
590 } else { |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
591 _parallel_workers->initialize_workers(); |
|
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
592 } |
| 342 | 593 } |
| 594 | |
| 595 // so that the call below can read a sensible value | |
| 596 _heap_start = (HeapWord*) rs.base(); | |
| 597 set_non_marking_state(); | |
| 598 } | |
| 599 | |
| 600 void ConcurrentMark::update_g1_committed(bool force) { | |
| 601 // If concurrent marking is not in progress, then we do not need to | |
|
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
602 // update _heap_end. |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
603 if (!concurrent_marking_in_progress() && !force) return; |
| 342 | 604 |
| 605 MemRegion committed = _g1h->g1_committed(); | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
606 assert(committed.start() == _heap_start, "start shouldn't change"); |
| 342 | 607 HeapWord* new_end = committed.end(); |
| 608 if (new_end > _heap_end) { | |
| 609 // The heap has been expanded. | |
| 610 | |
| 611 _heap_end = new_end; | |
| 612 } | |
| 613 // Notice that the heap can also shrink. However, this only happens | |
| 614 // during a Full GC (at least currently) and the entire marking | |
| 615 // phase will bail out and the task will not be restarted. So, let's | |
| 616 // do nothing. | |
| 617 } | |
| 618 | |
| 619 void ConcurrentMark::reset() { | |
| 620 // Starting values for these two. This should be called in a STW | |
| 621 // phase. CM will be notified of any future g1_committed expansions | |
| 622 // will be at the end of evacuation pauses, when tasks are | |
| 623 // inactive. | |
| 624 MemRegion committed = _g1h->g1_committed(); | |
| 625 _heap_start = committed.start(); | |
| 626 _heap_end = committed.end(); | |
| 627 | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
628 // Separated the asserts so that we know which one fires. |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
629 assert(_heap_start != NULL, "heap bounds should look ok"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
630 assert(_heap_end != NULL, "heap bounds should look ok"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
631 assert(_heap_start < _heap_end, "heap bounds should look ok"); |
| 342 | 632 |
| 633 // reset all the marking data structures and any necessary flags | |
| 634 clear_marking_state(); | |
| 635 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
636 if (verbose_low()) { |
| 342 | 637 gclog_or_tty->print_cr("[global] resetting"); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
638 } |
| 342 | 639 |
| 640 // We do reset all of them, since different phases will use | |
| 641 // different number of active threads. So, it's easiest to have all | |
| 642 // of them ready. | |
|
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
643 for (int i = 0; i < (int) _max_task_num; ++i) { |
| 342 | 644 _tasks[i]->reset(_nextMarkBitMap); |
|
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
645 } |
| 342 | 646 |
| 647 // we need this to make sure that the flag is on during the evac | |
| 648 // pause with initial mark piggy-backed | |
| 649 set_concurrent_marking_in_progress(); | |
| 650 } | |
| 651 | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
652 void ConcurrentMark::set_phase(uint active_tasks, bool concurrent) { |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
653 assert(active_tasks <= _max_task_num, "we should not have more"); |
| 342 | 654 |
| 655 _active_tasks = active_tasks; | |
| 656 // Need to update the three data structures below according to the | |
| 657 // number of active threads for this phase. | |
| 658 _terminator = ParallelTaskTerminator((int) active_tasks, _task_queues); | |
| 659 _first_overflow_barrier_sync.set_n_workers((int) active_tasks); | |
| 660 _second_overflow_barrier_sync.set_n_workers((int) active_tasks); | |
| 661 | |
| 662 _concurrent = concurrent; | |
| 663 // We propagate this to all tasks, not just the active ones. | |
| 664 for (int i = 0; i < (int) _max_task_num; ++i) | |
| 665 _tasks[i]->set_concurrent(concurrent); | |
| 666 | |
| 667 if (concurrent) { | |
| 668 set_concurrent_marking_in_progress(); | |
| 669 } else { | |
| 670 // We currently assume that the concurrent flag has been set to | |
| 671 // false before we start remark. At this point we should also be | |
| 672 // in a STW phase. | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
673 assert(!concurrent_marking_in_progress(), "invariant"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
674 assert(_finger == _heap_end, "only way to get here"); |
| 342 | 675 update_g1_committed(true); |
| 676 } | |
| 677 } | |
| 678 | |
| 679 void ConcurrentMark::set_non_marking_state() { | |
| 680 // We set the global marking state to some default values when we're | |
| 681 // not doing marking. | |
| 682 clear_marking_state(); | |
| 683 _active_tasks = 0; | |
| 684 clear_concurrent_marking_in_progress(); | |
| 685 } | |
| 686 | |
| 687 ConcurrentMark::~ConcurrentMark() { | |
| 4735 | 688 // The ConcurrentMark instance is never freed. |
| 689 ShouldNotReachHere(); | |
| 342 | 690 } |
| 691 | |
| 692 void ConcurrentMark::clearNextBitmap() { | |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
693 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
694 G1CollectorPolicy* g1p = g1h->g1_policy(); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
695 |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
696 // Make sure that the concurrent mark thread looks to still be in |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
697 // the current cycle. |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
698 guarantee(cmThread()->during_cycle(), "invariant"); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
699 |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
700 // We are finishing up the current cycle by clearing the next |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
701 // marking bitmap and getting it ready for the next cycle. During |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
702 // this time no other cycle can start. So, let's make sure that this |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
703 // is the case. |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
704 guarantee(!g1h->mark_in_progress(), "invariant"); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
705 |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
706 // clear the mark bitmap (no grey objects to start with). |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
707 // We need to do this in chunks and offer to yield in between |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
708 // each chunk. |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
709 HeapWord* start = _nextMarkBitMap->startWord(); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
710 HeapWord* end = _nextMarkBitMap->endWord(); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
711 HeapWord* cur = start; |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
712 size_t chunkSize = M; |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
713 while (cur < end) { |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
714 HeapWord* next = cur + chunkSize; |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
715 if (next > end) { |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
716 next = end; |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
717 } |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
718 MemRegion mr(cur,next); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
719 _nextMarkBitMap->clearRange(mr); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
720 cur = next; |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
721 do_yield_check(); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
722 |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
723 // Repeat the asserts from above. We'll do them as asserts here to |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
724 // minimize their overhead on the product. However, we'll have |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
725 // them as guarantees at the beginning / end of the bitmap |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
726 // clearing to get some checking in the product. |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
727 assert(cmThread()->during_cycle(), "invariant"); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
728 assert(!g1h->mark_in_progress(), "invariant"); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
729 } |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
730 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
731 // Clear the liveness counting data |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
732 clear_all_count_data(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
733 |
|
1359
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
734 // Repeat the asserts from above. |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
735 guarantee(cmThread()->during_cycle(), "invariant"); |
|
23b1b27ac76c
6909756: G1: guarantee(G1CollectedHeap::heap()->mark_in_progress(),"Precondition.")
tonyp
parents:
1358
diff
changeset
|
736 guarantee(!g1h->mark_in_progress(), "invariant"); |
| 342 | 737 } |
| 738 | |
| 739 class NoteStartOfMarkHRClosure: public HeapRegionClosure { | |
| 740 public: | |
| 741 bool doHeapRegion(HeapRegion* r) { | |
| 742 if (!r->continuesHumongous()) { | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
743 r->note_start_of_marking(); |
| 342 | 744 } |
| 745 return false; | |
| 746 } | |
| 747 }; | |
| 748 | |
| 749 void ConcurrentMark::checkpointRootsInitialPre() { | |
| 750 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
| 751 G1CollectorPolicy* g1p = g1h->g1_policy(); | |
| 752 | |
| 753 _has_aborted = false; | |
| 754 | |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1388
diff
changeset
|
755 #ifndef PRODUCT |
| 1044 | 756 if (G1PrintReachableAtInitialMark) { |
| 1388 | 757 print_reachable("at-cycle-start", |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
758 VerifyOption_G1UsePrevMarking, true /* all */); |
| 1044 | 759 } |
|
1547
fb1a39993f69
6951319: enable solaris builds using Sun Studio 12 update 1
jcoomes
parents:
1388
diff
changeset
|
760 #endif |
| 342 | 761 |
| 762 // Initialise marking structures. This has to be done in a STW phase. | |
| 763 reset(); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
764 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
765 // For each region note start of marking. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
766 NoteStartOfMarkHRClosure startcl; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
767 g1h->heap_region_iterate(&startcl); |
| 342 | 768 } |
| 769 | |
| 770 | |
| 771 void ConcurrentMark::checkpointRootsInitialPost() { | |
| 772 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
| 773 | |
|
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
774 // If we force an overflow during remark, the remark operation will |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
775 // actually abort and we'll restart concurrent marking. If we always |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
776 // force an oveflow during remark we'll never actually complete the |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
777 // marking phase. So, we initilize this here, at the start of the |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
778 // cycle, so that at the remaining overflow number will decrease at |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
779 // every remark and we'll eventually not need to cause one. |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
780 force_overflow_stw()->init(); |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
781 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
782 // Start Concurrent Marking weak-reference discovery. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
783 ReferenceProcessor* rp = g1h->ref_processor_cm(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
784 // enable ("weak") refs discovery |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
785 rp->enable_discovery(true /*verify_disabled*/, true /*verify_no_refs*/); |
|
457
27a80744a83b
6778647: snap(), snap_policy() should be renamed setup(), setup_policy()
ysr
parents:
453
diff
changeset
|
786 rp->setup_policy(false); // snapshot the soft ref policy to be used in this cycle |
| 342 | 787 |
| 788 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); | |
|
1317
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
789 // This is the start of the marking cycle, we're expected all |
|
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
790 // threads to have SATB queues with active set to false. |
|
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
791 satb_mq_set.set_active_all_threads(true, /* new active value */ |
|
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
792 false /* expected_active */); |
| 342 | 793 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
794 _root_regions.prepare_for_scan(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
795 |
| 342 | 796 // update_g1_committed() will be called at the end of an evac pause |
| 797 // when marking is on. So, it's also called at the end of the | |
| 798 // initial-mark pause to update the heap end, if the heap expands | |
| 799 // during it. No need to call it here. | |
| 800 } | |
| 801 | |
| 802 /* | |
|
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
803 * Notice that in the next two methods, we actually leave the STS |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
804 * during the barrier sync and join it immediately afterwards. If we |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
805 * do not do this, the following deadlock can occur: one thread could |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
806 * be in the barrier sync code, waiting for the other thread to also |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
807 * sync up, whereas another one could be trying to yield, while also |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
808 * waiting for the other threads to sync up too. |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
809 * |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
810 * Note, however, that this code is also used during remark and in |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
811 * this case we should not attempt to leave / enter the STS, otherwise |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
812 * we'll either hit an asseert (debug / fastdebug) or deadlock |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
813 * (product). So we should only leave / enter the STS if we are |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
814 * operating concurrently. |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
815 * |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
816 * Because the thread that does the sync barrier has left the STS, it |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
817 * is possible to be suspended for a Full GC or an evacuation pause |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
818 * could occur. This is actually safe, since the entering the sync |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
819 * barrier is one of the last things do_marking_step() does, and it |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
820 * doesn't manipulate any data structures afterwards. |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
821 */ |
| 342 | 822 |
| 823 void ConcurrentMark::enter_first_sync_barrier(int task_num) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
824 if (verbose_low()) { |
| 342 | 825 gclog_or_tty->print_cr("[%d] entering first barrier", task_num); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
826 } |
| 342 | 827 |
|
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
828 if (concurrent()) { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
829 ConcurrentGCThread::stsLeave(); |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
830 } |
| 342 | 831 _first_overflow_barrier_sync.enter(); |
|
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
832 if (concurrent()) { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
833 ConcurrentGCThread::stsJoin(); |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
834 } |
| 342 | 835 // at this point everyone should have synced up and not be doing any |
| 836 // more work | |
| 837 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
838 if (verbose_low()) { |
| 342 | 839 gclog_or_tty->print_cr("[%d] leaving first barrier", task_num); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
840 } |
| 342 | 841 |
| 842 // let task 0 do this | |
| 843 if (task_num == 0) { | |
| 844 // task 0 is responsible for clearing the global data structures | |
|
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
845 // We should be here because of an overflow. During STW we should |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
846 // not clear the overflow flag since we rely on it being true when |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
847 // we exit this method to abort the pause and restart concurent |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
848 // marking. |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
849 clear_marking_state(concurrent() /* clear_overflow */); |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
850 force_overflow()->update(); |
| 342 | 851 |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5988
diff
changeset
|
852 if (G1Log::fine()) { |
| 342 | 853 gclog_or_tty->date_stamp(PrintGCDateStamps); |
| 854 gclog_or_tty->stamp(PrintGCTimeStamps); | |
| 855 gclog_or_tty->print_cr("[GC concurrent-mark-reset-for-overflow]"); | |
| 856 } | |
| 857 } | |
| 858 | |
| 859 // after this, each task should reset its own data structures then | |
| 860 // then go into the second barrier | |
| 861 } | |
| 862 | |
| 863 void ConcurrentMark::enter_second_sync_barrier(int task_num) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
864 if (verbose_low()) { |
| 342 | 865 gclog_or_tty->print_cr("[%d] entering second barrier", task_num); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
866 } |
| 342 | 867 |
|
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
868 if (concurrent()) { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
869 ConcurrentGCThread::stsLeave(); |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
870 } |
| 342 | 871 _second_overflow_barrier_sync.enter(); |
|
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
872 if (concurrent()) { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
873 ConcurrentGCThread::stsJoin(); |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
874 } |
| 342 | 875 // at this point everything should be re-initialised and ready to go |
| 876 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
877 if (verbose_low()) { |
| 342 | 878 gclog_or_tty->print_cr("[%d] leaving second barrier", task_num); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
879 } |
| 342 | 880 } |
| 881 | |
|
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
882 #ifndef PRODUCT |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
883 void ForceOverflowSettings::init() { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
884 _num_remaining = G1ConcMarkForceOverflow; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
885 _force = false; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
886 update(); |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
887 } |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
888 |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
889 void ForceOverflowSettings::update() { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
890 if (_num_remaining > 0) { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
891 _num_remaining -= 1; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
892 _force = true; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
893 } else { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
894 _force = false; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
895 } |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
896 } |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
897 |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
898 bool ForceOverflowSettings::should_force() { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
899 if (_force) { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
900 _force = false; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
901 return true; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
902 } else { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
903 return false; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
904 } |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
905 } |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
906 #endif // !PRODUCT |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
907 |
| 342 | 908 class CMConcurrentMarkingTask: public AbstractGangTask { |
| 909 private: | |
| 910 ConcurrentMark* _cm; | |
| 911 ConcurrentMarkThread* _cmt; | |
| 912 | |
| 913 public: | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
914 void work(uint worker_id) { |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
915 assert(Thread::current()->is_ConcurrentGC_thread(), |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
916 "this should only be done by a conc GC thread"); |
|
1974
fd1d227ef1b9
6983204: G1: Nightly test nsk/regression/b4958615 failing with +ExplicitGCInvokesConcurrent
johnc
parents:
1972
diff
changeset
|
917 ResourceMark rm; |
| 342 | 918 |
| 919 double start_vtime = os::elapsedVTime(); | |
| 920 | |
| 921 ConcurrentGCThread::stsJoin(); | |
| 922 | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
923 assert(worker_id < _cm->active_tasks(), "invariant"); |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
924 CMTask* the_task = _cm->task(worker_id); |
| 342 | 925 the_task->record_start_time(); |
| 926 if (!_cm->has_aborted()) { | |
| 927 do { | |
| 928 double start_vtime_sec = os::elapsedVTime(); | |
| 929 double start_time_sec = os::elapsedTime(); | |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
930 double mark_step_duration_ms = G1ConcMarkStepDurationMillis; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
931 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
932 the_task->do_marking_step(mark_step_duration_ms, |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
933 true /* do_stealing */, |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
934 true /* do_termination */); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
935 |
| 342 | 936 double end_time_sec = os::elapsedTime(); |
| 937 double end_vtime_sec = os::elapsedVTime(); | |
| 938 double elapsed_vtime_sec = end_vtime_sec - start_vtime_sec; | |
| 939 double elapsed_time_sec = end_time_sec - start_time_sec; | |
| 940 _cm->clear_has_overflown(); | |
| 941 | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
942 bool ret = _cm->do_yield_check(worker_id); |
| 342 | 943 |
| 944 jlong sleep_time_ms; | |
| 945 if (!_cm->has_aborted() && the_task->has_aborted()) { | |
| 946 sleep_time_ms = | |
| 947 (jlong) (elapsed_vtime_sec * _cm->sleep_factor() * 1000.0); | |
| 948 ConcurrentGCThread::stsLeave(); | |
| 949 os::sleep(Thread::current(), sleep_time_ms, false); | |
| 950 ConcurrentGCThread::stsJoin(); | |
| 951 } | |
| 952 double end_time2_sec = os::elapsedTime(); | |
| 953 double elapsed_time2_sec = end_time2_sec - start_time_sec; | |
| 954 | |
| 955 #if 0 | |
| 956 gclog_or_tty->print_cr("CM: elapsed %1.4lf ms, sleep %1.4lf ms, " | |
| 957 "overhead %1.4lf", | |
| 958 elapsed_vtime_sec * 1000.0, (double) sleep_time_ms, | |
| 959 the_task->conc_overhead(os::elapsedTime()) * 8.0); | |
| 960 gclog_or_tty->print_cr("elapsed time %1.4lf ms, time 2: %1.4lf ms", | |
| 961 elapsed_time_sec * 1000.0, elapsed_time2_sec * 1000.0); | |
| 962 #endif | |
| 963 } while (!_cm->has_aborted() && the_task->has_aborted()); | |
| 964 } | |
| 965 the_task->record_end_time(); | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
966 guarantee(!the_task->has_aborted() || _cm->has_aborted(), "invariant"); |
| 342 | 967 |
| 968 ConcurrentGCThread::stsLeave(); | |
| 969 | |
| 970 double end_vtime = os::elapsedVTime(); | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
971 _cm->update_accum_task_vtime(worker_id, end_vtime - start_vtime); |
| 342 | 972 } |
| 973 | |
| 974 CMConcurrentMarkingTask(ConcurrentMark* cm, | |
| 975 ConcurrentMarkThread* cmt) : | |
| 976 AbstractGangTask("Concurrent Mark"), _cm(cm), _cmt(cmt) { } | |
| 977 | |
| 978 ~CMConcurrentMarkingTask() { } | |
| 979 }; | |
| 980 | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
981 // Calculates the number of active workers for a concurrent |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
982 // phase. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
983 uint ConcurrentMark::calc_parallel_marking_threads() { |
| 4711 | 984 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
985 uint n_conc_workers = 0; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
986 if (!UseDynamicNumberOfGCThreads || |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
987 (!FLAG_IS_DEFAULT(ConcGCThreads) && |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
988 !ForceDynamicNumberOfGCThreads)) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
989 n_conc_workers = max_parallel_marking_threads(); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
990 } else { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
991 n_conc_workers = |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
992 AdaptiveSizePolicy::calc_default_active_workers( |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
993 max_parallel_marking_threads(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
994 1, /* Minimum workers */ |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
995 parallel_marking_threads(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
996 Threads::number_of_non_daemon_threads()); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
997 // Don't scale down "n_conc_workers" by scale_parallel_threads() because |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
998 // that scaling has already gone into "_max_parallel_marking_threads". |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
999 } |
| 4711 | 1000 assert(n_conc_workers > 0, "Always need at least 1"); |
| 1001 return n_conc_workers; | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1002 } |
| 4711 | 1003 // If we are not running with any parallel GC threads we will not |
| 1004 // have spawned any marking threads either. Hence the number of | |
| 1005 // concurrent workers should be 0. | |
| 1006 return 0; | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1007 } |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1008 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1009 void ConcurrentMark::scanRootRegion(HeapRegion* hr, uint worker_id) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1010 // Currently, only survivors can be root regions. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1011 assert(hr->next_top_at_mark_start() == hr->bottom(), "invariant"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1012 G1RootRegionScanClosure cl(_g1h, this, worker_id); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1013 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1014 const uintx interval = PrefetchScanIntervalInBytes; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1015 HeapWord* curr = hr->bottom(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1016 const HeapWord* end = hr->top(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1017 while (curr < end) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1018 Prefetch::read(curr, interval); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1019 oop obj = oop(curr); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1020 int size = obj->oop_iterate(&cl); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1021 assert(size == obj->size(), "sanity"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1022 curr += size; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1023 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1024 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1025 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1026 class CMRootRegionScanTask : public AbstractGangTask { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1027 private: |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1028 ConcurrentMark* _cm; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1029 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1030 public: |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1031 CMRootRegionScanTask(ConcurrentMark* cm) : |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1032 AbstractGangTask("Root Region Scan"), _cm(cm) { } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1033 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1034 void work(uint worker_id) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1035 assert(Thread::current()->is_ConcurrentGC_thread(), |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1036 "this should only be done by a conc GC thread"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1037 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1038 CMRootRegions* root_regions = _cm->root_regions(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1039 HeapRegion* hr = root_regions->claim_next(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1040 while (hr != NULL) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1041 _cm->scanRootRegion(hr, worker_id); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1042 hr = root_regions->claim_next(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1043 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1044 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1045 }; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1046 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1047 void ConcurrentMark::scanRootRegions() { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1048 // scan_in_progress() will have been set to true only if there was |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1049 // at least one root region to scan. So, if it's false, we |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1050 // should not attempt to do any further work. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1051 if (root_regions()->scan_in_progress()) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1052 _parallel_marking_threads = calc_parallel_marking_threads(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1053 assert(parallel_marking_threads() <= max_parallel_marking_threads(), |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1054 "Maximum number of marking threads exceeded"); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1055 uint active_workers = MAX2(1U, parallel_marking_threads()); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1056 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1057 CMRootRegionScanTask task(this); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1058 if (parallel_marking_threads() > 0) { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1059 _parallel_workers->set_active_workers((int) active_workers); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1060 _parallel_workers->run_task(&task); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1061 } else { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1062 task.work(0); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1063 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1064 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1065 // It's possible that has_aborted() is true here without actually |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1066 // aborting the survivor scan earlier. This is OK as it's |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1067 // mainly used for sanity checking. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1068 root_regions()->scan_finished(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1069 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1070 } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
1071 |
| 342 | 1072 void ConcurrentMark::markFromRoots() { |
| 1073 // we might be tempted to assert that: | |
| 1074 // assert(asynch == !SafepointSynchronize::is_at_safepoint(), | |
| 1075 // "inconsistent argument?"); | |
| 1076 // However that wouldn't be right, because it's possible that | |
| 1077 // a safepoint is indeed in progress as a younger generation | |
| 1078 // stop-the-world GC happens even as we mark in this generation. | |
| 1079 | |
| 1080 _restart_for_overflow = false; | |
|
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
1081 force_overflow_conc()->init(); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1082 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1083 // _g1h has _n_par_threads |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1084 _parallel_marking_threads = calc_parallel_marking_threads(); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1085 assert(parallel_marking_threads() <= max_parallel_marking_threads(), |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1086 "Maximum number of marking threads exceeded"); |
| 4711 | 1087 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1088 uint active_workers = MAX2(1U, parallel_marking_threads()); |
| 4711 | 1089 |
| 1090 // Parallel task terminator is set in "set_phase()" | |
| 1091 set_phase(active_workers, true /* concurrent */); | |
| 342 | 1092 |
| 1093 CMConcurrentMarkingTask markingTask(this, cmThread()); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1094 if (parallel_marking_threads() > 0) { |
| 4711 | 1095 _parallel_workers->set_active_workers((int)active_workers); |
| 1096 // Don't set _n_par_threads because it affects MT in proceess_strong_roots() | |
| 1097 // and the decisions on that MT processing is made elsewhere. | |
| 1098 assert(_parallel_workers->active_workers() > 0, "Should have been set"); | |
| 342 | 1099 _parallel_workers->run_task(&markingTask); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1100 } else { |
| 342 | 1101 markingTask.work(0); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1102 } |
| 342 | 1103 print_stats(); |
| 1104 } | |
| 1105 | |
| 1106 void ConcurrentMark::checkpointRootsFinal(bool clear_all_soft_refs) { | |
| 1107 // world is stopped at this checkpoint | |
| 1108 assert(SafepointSynchronize::is_at_safepoint(), | |
| 1109 "world should be stopped"); | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
1110 |
| 342 | 1111 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
| 1112 | |
| 1113 // If a full collection has happened, we shouldn't do this. | |
| 1114 if (has_aborted()) { | |
| 1115 g1h->set_marking_complete(); // So bitmap clearing isn't confused | |
| 1116 return; | |
| 1117 } | |
| 1118 | |
|
2125
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2037
diff
changeset
|
1119 SvcGCMarker sgcm(SvcGCMarker::OTHER); |
|
7246a374a9f2
6458402: 3 jvmti tests fail with CMS and +ExplicitGCInvokesConcurrent
kamg
parents:
2037
diff
changeset
|
1120 |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1121 if (VerifyDuringGC) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1122 HandleMark hm; // handle scope |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1123 gclog_or_tty->print(" VerifyDuringGC:(before)"); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1124 Universe::heap()->prepare_for_verify(); |
| 6008 | 1125 Universe::verify(/* silent */ false, |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1126 /* option */ VerifyOption_G1UsePrevMarking); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1127 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1128 |
| 342 | 1129 G1CollectorPolicy* g1p = g1h->g1_policy(); |
| 1130 g1p->record_concurrent_mark_remark_start(); | |
| 1131 | |
| 1132 double start = os::elapsedTime(); | |
| 1133 | |
| 1134 checkpointRootsFinalWork(); | |
| 1135 | |
| 1136 double mark_work_end = os::elapsedTime(); | |
| 1137 | |
| 1138 weakRefsWork(clear_all_soft_refs); | |
| 1139 | |
| 1140 if (has_overflown()) { | |
| 1141 // Oops. We overflowed. Restart concurrent marking. | |
| 1142 _restart_for_overflow = true; | |
| 1143 // Clear the flag. We do not need it any more. | |
| 1144 clear_has_overflown(); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1145 if (G1TraceMarkStackOverflow) { |
| 342 | 1146 gclog_or_tty->print_cr("\nRemark led to restart for overflow."); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1147 } |
| 342 | 1148 } else { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1149 // Aggregate the per-task counting data that we have accumulated |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1150 // while marking. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1151 aggregate_count_data(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1152 |
| 2149 | 1153 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); |
| 342 | 1154 // We're done with marking. |
|
1317
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
1155 // This is the end of the marking cycle, we're expected all |
|
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
1156 // threads to have SATB queues with active set to true. |
| 2149 | 1157 satb_mq_set.set_active_all_threads(false, /* new active value */ |
| 1158 true /* expected_active */); | |
| 811 | 1159 |
| 1160 if (VerifyDuringGC) { | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1161 HandleMark hm; // handle scope |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1162 gclog_or_tty->print(" VerifyDuringGC:(after)"); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1163 Universe::heap()->prepare_for_verify(); |
| 6008 | 1164 Universe::verify(/* silent */ false, |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1165 /* option */ VerifyOption_G1UseNextMarking); |
| 811 | 1166 } |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1167 assert(!restart_for_overflow(), "sanity"); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1168 } |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1169 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1170 // Reset the marking state if marking completed |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1171 if (!restart_for_overflow()) { |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1172 set_non_marking_state(); |
| 342 | 1173 } |
| 1174 | |
| 1175 #if VERIFY_OBJS_PROCESSED | |
| 1176 _scan_obj_cl.objs_processed = 0; | |
| 1177 ThreadLocalObjQueue::objs_enqueued = 0; | |
| 1178 #endif | |
| 1179 | |
| 1180 // Statistics | |
| 1181 double now = os::elapsedTime(); | |
| 1182 _remark_mark_times.add((mark_work_end - start) * 1000.0); | |
| 1183 _remark_weak_ref_times.add((now - mark_work_end) * 1000.0); | |
| 1184 _remark_times.add((now - start) * 1000.0); | |
| 1185 | |
| 1186 g1p->record_concurrent_mark_remark_end(); | |
| 1187 } | |
| 1188 | |
|
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1189 // Base class of the closures that finalize and verify the |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1190 // liveness counting data. |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1191 class CMCountDataClosureBase: public HeapRegionClosure { |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1192 protected: |
| 342 | 1193 ConcurrentMark* _cm; |
| 1194 BitMap* _region_bm; | |
| 1195 BitMap* _card_bm; | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1196 |
|
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1197 void set_card_bitmap_range(BitMap::idx_t start_idx, BitMap::idx_t last_idx) { |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1198 assert(start_idx <= last_idx, "sanity"); |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1199 |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1200 // Set the inclusive bit range [start_idx, last_idx]. |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1201 // For small ranges (up to 8 cards) use a simple loop; otherwise |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1202 // use par_at_put_range. |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1203 if ((last_idx - start_idx) < 8) { |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1204 for (BitMap::idx_t i = start_idx; i <= last_idx; i += 1) { |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1205 _card_bm->par_set_bit(i); |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1206 } |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1207 } else { |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1208 assert(last_idx < _card_bm->size(), "sanity"); |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1209 // Note BitMap::par_at_put_range() is exclusive. |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1210 _card_bm->par_at_put_range(start_idx, last_idx+1, true); |
| 342 | 1211 } |
| 1212 } | |
| 1213 | |
| 829 | 1214 // It takes a region that's not empty (i.e., it has at least one |
| 1215 // live object in it and sets its corresponding bit on the region | |
| 1216 // bitmap to 1. If the region is "starts humongous" it will also set | |
| 1217 // to 1 the bits on the region bitmap that correspond to its | |
| 1218 // associated "continues humongous" regions. | |
| 1219 void set_bit_for_region(HeapRegion* hr) { | |
| 1220 assert(!hr->continuesHumongous(), "should have filtered those out"); | |
| 1221 | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1222 BitMap::idx_t index = (BitMap::idx_t) hr->hrs_index(); |
| 829 | 1223 if (!hr->startsHumongous()) { |
| 1224 // Normal (non-humongous) case: just set the bit. | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1225 _region_bm->par_at_put(index, true); |
| 829 | 1226 } else { |
| 1227 // Starts humongous case: calculate how many regions are part of | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1228 // this humongous region and then set the bit range. |
| 829 | 1229 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1230 HeapRegion *last_hr = g1h->heap_region_containing_raw(hr->end() - 1); |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1231 BitMap::idx_t end_index = (BitMap::idx_t) last_hr->hrs_index() + 1; |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1232 _region_bm->par_at_put_range(index, end_index, true); |
| 829 | 1233 } |
| 1234 } | |
| 1235 | |
|
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1236 public: |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1237 CMCountDataClosureBase(ConcurrentMark *cm, |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1238 BitMap* region_bm, BitMap* card_bm): |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1239 _cm(cm), _region_bm(region_bm), _card_bm(card_bm) { } |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1240 }; |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1241 |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1242 // Closure that calculates the # live objects per region. Used |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1243 // for verification purposes during the cleanup pause. |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1244 class CalcLiveObjectsClosure: public CMCountDataClosureBase { |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1245 CMBitMapRO* _bm; |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1246 size_t _region_marked_bytes; |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1247 |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1248 public: |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1249 CalcLiveObjectsClosure(CMBitMapRO *bm, ConcurrentMark *cm, |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1250 BitMap* region_bm, BitMap* card_bm) : |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1251 CMCountDataClosureBase(cm, region_bm, card_bm), |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1252 _bm(bm), _region_marked_bytes(0) { } |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1253 |
| 342 | 1254 bool doHeapRegion(HeapRegion* hr) { |
| 1255 | |
| 639 | 1256 if (hr->continuesHumongous()) { |
| 829 | 1257 // We will ignore these here and process them when their |
| 1258 // associated "starts humongous" region is processed (see | |
| 1259 // set_bit_for_heap_region()). Note that we cannot rely on their | |
| 1260 // associated "starts humongous" region to have their bit set to | |
| 1261 // 1 since, due to the region chunking in the parallel region | |
| 1262 // iteration, a "continues humongous" region might be visited | |
| 1263 // before its associated "starts humongous". | |
| 639 | 1264 return false; |
| 1265 } | |
| 342 | 1266 |
| 1267 HeapWord* nextTop = hr->next_top_at_mark_start(); | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1268 HeapWord* start = hr->bottom(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1269 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1270 assert(start <= hr->end() && start <= nextTop && nextTop <= hr->end(), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1271 err_msg("Preconditions not met - " |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1272 "start: "PTR_FORMAT", nextTop: "PTR_FORMAT", end: "PTR_FORMAT, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1273 start, nextTop, hr->end())); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1274 |
| 342 | 1275 // Find the first marked object at or after "start". |
| 1276 start = _bm->getNextMarkedWordAddress(start, nextTop); | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1277 |
| 342 | 1278 size_t marked_bytes = 0; |
| 1279 | |
| 1280 while (start < nextTop) { | |
| 1281 oop obj = oop(start); | |
| 1282 int obj_sz = obj->size(); | |
| 1283 HeapWord* obj_last = start + obj_sz - 1; | |
|
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1284 |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1285 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(start); |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1286 BitMap::idx_t last_idx = _cm->card_bitmap_index_for(obj_last); |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1287 |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1288 // Set the bits in the card BM for this object (inclusive). |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1289 set_card_bitmap_range(start_idx, last_idx); |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1290 |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1291 // Add the size of this object to the number of marked bytes. |
|
1030
dfdaf65c3423
6858886: G1: guarantee(_next_marked_bytes <= used(),"invariant") at heapRegion.hpp:359
apetrusenko
parents:
1023
diff
changeset
|
1292 marked_bytes += (size_t)obj_sz * HeapWordSize; |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1293 |
| 342 | 1294 // Find the next marked object after this one. |
|
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1295 start = _bm->getNextMarkedWordAddress(obj_last + 1, nextTop); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1296 } |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1297 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1298 // Mark the allocated-since-marking portion... |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1299 HeapWord* top = hr->top(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1300 if (nextTop < top) { |
|
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1301 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(nextTop); |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1302 BitMap::idx_t last_idx = _cm->card_bitmap_index_for(top - 1); |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1303 |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1304 set_card_bitmap_range(start_idx, last_idx); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1305 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1306 // This definitely means the region has live objects. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1307 set_bit_for_region(hr); |
| 342 | 1308 } |
| 1309 | |
| 1310 // Update the live region bitmap. | |
| 1311 if (marked_bytes > 0) { | |
| 829 | 1312 set_bit_for_region(hr); |
| 342 | 1313 } |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1314 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1315 // Set the marked bytes for the current region so that |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1316 // it can be queried by a calling verificiation routine |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1317 _region_marked_bytes = marked_bytes; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1318 |
| 342 | 1319 return false; |
| 1320 } | |
| 1321 | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1322 size_t region_marked_bytes() const { return _region_marked_bytes; } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1323 }; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1324 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1325 // Heap region closure used for verifying the counting data |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1326 // that was accumulated concurrently and aggregated during |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1327 // the remark pause. This closure is applied to the heap |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1328 // regions during the STW cleanup pause. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1329 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1330 class VerifyLiveObjectDataHRClosure: public HeapRegionClosure { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1331 ConcurrentMark* _cm; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1332 CalcLiveObjectsClosure _calc_cl; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1333 BitMap* _region_bm; // Region BM to be verified |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1334 BitMap* _card_bm; // Card BM to be verified |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1335 bool _verbose; // verbose output? |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1336 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1337 BitMap* _exp_region_bm; // Expected Region BM values |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1338 BitMap* _exp_card_bm; // Expected card BM values |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1339 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1340 int _failures; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1341 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1342 public: |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1343 VerifyLiveObjectDataHRClosure(ConcurrentMark* cm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1344 BitMap* region_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1345 BitMap* card_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1346 BitMap* exp_region_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1347 BitMap* exp_card_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1348 bool verbose) : |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1349 _cm(cm), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1350 _calc_cl(_cm->nextMarkBitMap(), _cm, exp_region_bm, exp_card_bm), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1351 _region_bm(region_bm), _card_bm(card_bm), _verbose(verbose), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1352 _exp_region_bm(exp_region_bm), _exp_card_bm(exp_card_bm), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1353 _failures(0) { } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1354 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1355 int failures() const { return _failures; } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1356 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1357 bool doHeapRegion(HeapRegion* hr) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1358 if (hr->continuesHumongous()) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1359 // We will ignore these here and process them when their |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1360 // associated "starts humongous" region is processed (see |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1361 // set_bit_for_heap_region()). Note that we cannot rely on their |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1362 // associated "starts humongous" region to have their bit set to |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1363 // 1 since, due to the region chunking in the parallel region |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1364 // iteration, a "continues humongous" region might be visited |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1365 // before its associated "starts humongous". |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1366 return false; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1367 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1368 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1369 int failures = 0; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1370 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1371 // Call the CalcLiveObjectsClosure to walk the marking bitmap for |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1372 // this region and set the corresponding bits in the expected region |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1373 // and card bitmaps. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1374 bool res = _calc_cl.doHeapRegion(hr); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1375 assert(res == false, "should be continuing"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1376 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1377 MutexLockerEx x((_verbose ? ParGCRareEvent_lock : NULL), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1378 Mutex::_no_safepoint_check_flag); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1379 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1380 // Verify the marked bytes for this region. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1381 size_t exp_marked_bytes = _calc_cl.region_marked_bytes(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1382 size_t act_marked_bytes = hr->next_marked_bytes(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1383 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1384 // We're not OK if expected marked bytes > actual marked bytes. It means |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1385 // we have missed accounting some objects during the actual marking. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1386 if (exp_marked_bytes > act_marked_bytes) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1387 if (_verbose) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1388 gclog_or_tty->print_cr("Region %u: marked bytes mismatch: " |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1389 "expected: " SIZE_FORMAT ", actual: " SIZE_FORMAT, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1390 hr->hrs_index(), exp_marked_bytes, act_marked_bytes); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1391 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1392 failures += 1; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1393 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1394 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1395 // Verify the bit, for this region, in the actual and expected |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1396 // (which was just calculated) region bit maps. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1397 // We're not OK if the bit in the calculated expected region |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1398 // bitmap is set and the bit in the actual region bitmap is not. |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1399 BitMap::idx_t index = (BitMap::idx_t) hr->hrs_index(); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1400 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1401 bool expected = _exp_region_bm->at(index); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1402 bool actual = _region_bm->at(index); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1403 if (expected && !actual) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1404 if (_verbose) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1405 gclog_or_tty->print_cr("Region %u: region bitmap mismatch: " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1406 "expected: %s, actual: %s", |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1407 hr->hrs_index(), |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1408 BOOL_TO_STR(expected), BOOL_TO_STR(actual)); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1409 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1410 failures += 1; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1411 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1412 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1413 // Verify that the card bit maps for the cards spanned by the current |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1414 // region match. We have an error if we have a set bit in the expected |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1415 // bit map and the corresponding bit in the actual bitmap is not set. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1416 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1417 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(hr->bottom()); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1418 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(hr->top()); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1419 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1420 for (BitMap::idx_t i = start_idx; i < end_idx; i+=1) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1421 expected = _exp_card_bm->at(i); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1422 actual = _card_bm->at(i); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1423 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1424 if (expected && !actual) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1425 if (_verbose) { |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1426 gclog_or_tty->print_cr("Region %u: card bitmap mismatch at " SIZE_FORMAT ": " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1427 "expected: %s, actual: %s", |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1428 hr->hrs_index(), i, |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1429 BOOL_TO_STR(expected), BOOL_TO_STR(actual)); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1430 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1431 failures += 1; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1432 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1433 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1434 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1435 if (failures > 0 && _verbose) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1436 gclog_or_tty->print_cr("Region " HR_FORMAT ", ntams: " PTR_FORMAT ", " |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1437 "marked_bytes: calc/actual " SIZE_FORMAT "/" SIZE_FORMAT, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1438 HR_FORMAT_PARAMS(hr), hr->next_top_at_mark_start(), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1439 _calc_cl.region_marked_bytes(), hr->next_marked_bytes()); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1440 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1441 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1442 _failures += failures; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1443 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1444 // We could stop iteration over the heap when we |
|
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1445 // find the first violating region by returning true. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1446 return false; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1447 } |
| 342 | 1448 }; |
| 1449 | |
| 1450 | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1451 class G1ParVerifyFinalCountTask: public AbstractGangTask { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1452 protected: |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1453 G1CollectedHeap* _g1h; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1454 ConcurrentMark* _cm; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1455 BitMap* _actual_region_bm; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1456 BitMap* _actual_card_bm; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1457 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1458 uint _n_workers; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1459 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1460 BitMap* _expected_region_bm; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1461 BitMap* _expected_card_bm; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1462 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1463 int _failures; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1464 bool _verbose; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1465 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1466 public: |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1467 G1ParVerifyFinalCountTask(G1CollectedHeap* g1h, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1468 BitMap* region_bm, BitMap* card_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1469 BitMap* expected_region_bm, BitMap* expected_card_bm) |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1470 : AbstractGangTask("G1 verify final counting"), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1471 _g1h(g1h), _cm(_g1h->concurrent_mark()), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1472 _actual_region_bm(region_bm), _actual_card_bm(card_bm), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1473 _expected_region_bm(expected_region_bm), _expected_card_bm(expected_card_bm), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1474 _failures(0), _verbose(false), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1475 _n_workers(0) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1476 assert(VerifyDuringGC, "don't call this otherwise"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1477 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1478 // Use the value already set as the number of active threads |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1479 // in the call to run_task(). |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1480 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1481 assert( _g1h->workers()->active_workers() > 0, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1482 "Should have been previously set"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1483 _n_workers = _g1h->workers()->active_workers(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1484 } else { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1485 _n_workers = 1; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1486 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1487 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1488 assert(_expected_card_bm->size() == _actual_card_bm->size(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1489 assert(_expected_region_bm->size() == _actual_region_bm->size(), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1490 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1491 _verbose = _cm->verbose_medium(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1492 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1493 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1494 void work(uint worker_id) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1495 assert(worker_id < _n_workers, "invariant"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1496 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1497 VerifyLiveObjectDataHRClosure verify_cl(_cm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1498 _actual_region_bm, _actual_card_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1499 _expected_region_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1500 _expected_card_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1501 _verbose); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1502 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1503 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1504 _g1h->heap_region_par_iterate_chunked(&verify_cl, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1505 worker_id, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1506 _n_workers, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1507 HeapRegion::VerifyCountClaimValue); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1508 } else { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1509 _g1h->heap_region_iterate(&verify_cl); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1510 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1511 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1512 Atomic::add(verify_cl.failures(), &_failures); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1513 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1514 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1515 int failures() const { return _failures; } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1516 }; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1517 |
|
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1518 // Closure that finalizes the liveness counting data. |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1519 // Used during the cleanup pause. |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1520 // Sets the bits corresponding to the interval [NTAMS, top] |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1521 // (which contains the implicitly live objects) in the |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1522 // card liveness bitmap. Also sets the bit for each region, |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1523 // containing live data, in the region liveness bitmap. |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1524 |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1525 class FinalCountDataUpdateClosure: public CMCountDataClosureBase { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1526 public: |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1527 FinalCountDataUpdateClosure(ConcurrentMark* cm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1528 BitMap* region_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1529 BitMap* card_bm) : |
|
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1530 CMCountDataClosureBase(cm, region_bm, card_bm) { } |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1531 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1532 bool doHeapRegion(HeapRegion* hr) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1533 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1534 if (hr->continuesHumongous()) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1535 // We will ignore these here and process them when their |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1536 // associated "starts humongous" region is processed (see |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1537 // set_bit_for_heap_region()). Note that we cannot rely on their |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1538 // associated "starts humongous" region to have their bit set to |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1539 // 1 since, due to the region chunking in the parallel region |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1540 // iteration, a "continues humongous" region might be visited |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1541 // before its associated "starts humongous". |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1542 return false; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1543 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1544 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1545 HeapWord* ntams = hr->next_top_at_mark_start(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1546 HeapWord* top = hr->top(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1547 |
|
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1548 assert(hr->bottom() <= ntams && ntams <= hr->end(), "Preconditions."); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1549 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1550 // Mark the allocated-since-marking portion... |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1551 if (ntams < top) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1552 // This definitely means the region has live objects. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1553 set_bit_for_region(hr); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1554 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1555 |
|
6027
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1556 // Now set the bits for [ntams, top] |
|
8a2e5a6a19a4
7143490: G1: Remove HeapRegion::_top_at_conc_mark_count
johnc
parents:
6011
diff
changeset
|
1557 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(ntams); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1558 BitMap::idx_t last_idx = _cm->card_bitmap_index_for(top); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1559 set_card_bitmap_range(start_idx, last_idx); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1560 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1561 // Set the bit for the region if it contains live data |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1562 if (hr->next_marked_bytes() > 0) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1563 set_bit_for_region(hr); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1564 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1565 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1566 return false; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1567 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1568 }; |
| 342 | 1569 |
| 1570 class G1ParFinalCountTask: public AbstractGangTask { | |
| 1571 protected: | |
| 1572 G1CollectedHeap* _g1h; | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1573 ConcurrentMark* _cm; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1574 BitMap* _actual_region_bm; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1575 BitMap* _actual_card_bm; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1576 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1577 uint _n_workers; |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1578 |
| 342 | 1579 public: |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1580 G1ParFinalCountTask(G1CollectedHeap* g1h, BitMap* region_bm, BitMap* card_bm) |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1581 : AbstractGangTask("G1 final counting"), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1582 _g1h(g1h), _cm(_g1h->concurrent_mark()), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1583 _actual_region_bm(region_bm), _actual_card_bm(card_bm), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1584 _n_workers(0) { |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1585 // Use the value already set as the number of active threads |
| 6011 | 1586 // in the call to run_task(). |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1587 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1588 assert( _g1h->workers()->active_workers() > 0, |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1589 "Should have been previously set"); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1590 _n_workers = _g1h->workers()->active_workers(); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1591 } else { |
| 342 | 1592 _n_workers = 1; |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1593 } |
| 342 | 1594 } |
| 1595 | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1596 void work(uint worker_id) { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1597 assert(worker_id < _n_workers, "invariant"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1598 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1599 FinalCountDataUpdateClosure final_update_cl(_cm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1600 _actual_region_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1601 _actual_card_bm); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1602 |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
1603 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1604 _g1h->heap_region_par_iterate_chunked(&final_update_cl, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1605 worker_id, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1606 _n_workers, |
| 355 | 1607 HeapRegion::FinalCountClaimValue); |
| 342 | 1608 } else { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1609 _g1h->heap_region_iterate(&final_update_cl); |
| 342 | 1610 } |
| 1611 } | |
| 1612 }; | |
| 1613 | |
| 1614 class G1ParNoteEndTask; | |
| 1615 | |
| 1616 class G1NoteEndOfConcMarkClosure : public HeapRegionClosure { | |
| 1617 G1CollectedHeap* _g1; | |
| 1618 int _worker_num; | |
| 1619 size_t _max_live_bytes; | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1620 uint _regions_claimed; |
| 342 | 1621 size_t _freed_bytes; |
| 2173 | 1622 FreeRegionList* _local_cleanup_list; |
| 4072 | 1623 OldRegionSet* _old_proxy_set; |
| 2173 | 1624 HumongousRegionSet* _humongous_proxy_set; |
| 1625 HRRSCleanupTask* _hrrs_cleanup_task; | |
| 342 | 1626 double _claimed_region_time; |
| 1627 double _max_region_time; | |
| 1628 | |
| 1629 public: | |
| 1630 G1NoteEndOfConcMarkClosure(G1CollectedHeap* g1, | |
| 2173 | 1631 int worker_num, |
| 1632 FreeRegionList* local_cleanup_list, | |
| 4072 | 1633 OldRegionSet* old_proxy_set, |
| 2173 | 1634 HumongousRegionSet* humongous_proxy_set, |
|
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1635 HRRSCleanupTask* hrrs_cleanup_task) : |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1636 _g1(g1), _worker_num(worker_num), |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1637 _max_live_bytes(0), _regions_claimed(0), |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1638 _freed_bytes(0), |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1639 _claimed_region_time(0.0), _max_region_time(0.0), |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1640 _local_cleanup_list(local_cleanup_list), |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1641 _old_proxy_set(old_proxy_set), |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1642 _humongous_proxy_set(humongous_proxy_set), |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1643 _hrrs_cleanup_task(hrrs_cleanup_task) { } |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1644 |
| 342 | 1645 size_t freed_bytes() { return _freed_bytes; } |
| 1646 | |
|
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1647 bool doHeapRegion(HeapRegion *hr) { |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1648 // We use a claim value of zero here because all regions |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1649 // were claimed with value 1 in the FinalCount task. |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1650 hr->reset_gc_time_stamp(); |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1651 if (!hr->continuesHumongous()) { |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1652 double start = os::elapsedTime(); |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1653 _regions_claimed++; |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1654 hr->note_end_of_marking(); |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1655 _max_live_bytes += hr->max_live_bytes(); |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1656 _g1->free_region_if_empty(hr, |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1657 &_freed_bytes, |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1658 _local_cleanup_list, |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1659 _old_proxy_set, |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1660 _humongous_proxy_set, |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1661 _hrrs_cleanup_task, |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1662 true /* par */); |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1663 double region_time = (os::elapsedTime() - start); |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1664 _claimed_region_time += region_time; |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1665 if (region_time > _max_region_time) { |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1666 _max_region_time = region_time; |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1667 } |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1668 } |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1669 return false; |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
1670 } |
| 342 | 1671 |
| 1672 size_t max_live_bytes() { return _max_live_bytes; } | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1673 uint regions_claimed() { return _regions_claimed; } |
| 342 | 1674 double claimed_region_time_sec() { return _claimed_region_time; } |
| 1675 double max_region_time_sec() { return _max_region_time; } | |
| 1676 }; | |
| 1677 | |
| 1678 class G1ParNoteEndTask: public AbstractGangTask { | |
| 1679 friend class G1NoteEndOfConcMarkClosure; | |
| 2152 | 1680 |
| 342 | 1681 protected: |
| 1682 G1CollectedHeap* _g1h; | |
| 1683 size_t _max_live_bytes; | |
| 1684 size_t _freed_bytes; | |
| 2152 | 1685 FreeRegionList* _cleanup_list; |
| 1686 | |
| 342 | 1687 public: |
| 1688 G1ParNoteEndTask(G1CollectedHeap* g1h, | |
| 2152 | 1689 FreeRegionList* cleanup_list) : |
| 342 | 1690 AbstractGangTask("G1 note end"), _g1h(g1h), |
| 2152 | 1691 _max_live_bytes(0), _freed_bytes(0), _cleanup_list(cleanup_list) { } |
| 342 | 1692 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1693 void work(uint worker_id) { |
| 342 | 1694 double start = os::elapsedTime(); |
| 2173 | 1695 FreeRegionList local_cleanup_list("Local Cleanup List"); |
| 4072 | 1696 OldRegionSet old_proxy_set("Local Cleanup Old Proxy Set"); |
| 2173 | 1697 HumongousRegionSet humongous_proxy_set("Local Cleanup Humongous Proxy Set"); |
| 1698 HRRSCleanupTask hrrs_cleanup_task; | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1699 G1NoteEndOfConcMarkClosure g1_note_end(_g1h, worker_id, &local_cleanup_list, |
| 4072 | 1700 &old_proxy_set, |
| 2173 | 1701 &humongous_proxy_set, |
| 1702 &hrrs_cleanup_task); | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
1703 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1704 _g1h->heap_region_par_iterate_chunked(&g1_note_end, worker_id, |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1705 _g1h->workers()->active_workers(), |
| 355 | 1706 HeapRegion::NoteEndClaimValue); |
| 342 | 1707 } else { |
| 1708 _g1h->heap_region_iterate(&g1_note_end); | |
| 1709 } | |
| 1710 assert(g1_note_end.complete(), "Shouldn't have yielded!"); | |
| 1711 | |
| 2152 | 1712 // Now update the lists |
| 1713 _g1h->update_sets_after_freeing_regions(g1_note_end.freed_bytes(), | |
| 1714 NULL /* free_list */, | |
| 4072 | 1715 &old_proxy_set, |
| 2173 | 1716 &humongous_proxy_set, |
| 2152 | 1717 true /* par */); |
| 342 | 1718 { |
| 1719 MutexLockerEx x(ParGCRareEvent_lock, Mutex::_no_safepoint_check_flag); | |
| 1720 _max_live_bytes += g1_note_end.max_live_bytes(); | |
| 1721 _freed_bytes += g1_note_end.freed_bytes(); | |
| 2152 | 1722 |
|
3778
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1723 // If we iterate over the global cleanup list at the end of |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1724 // cleanup to do this printing we will not guarantee to only |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1725 // generate output for the newly-reclaimed regions (the list |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1726 // might not be empty at the beginning of cleanup; we might |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1727 // still be working on its previous contents). So we do the |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1728 // printing here, before we append the new regions to the global |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1729 // cleanup list. |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1730 |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1731 G1HRPrinter* hr_printer = _g1h->hr_printer(); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1732 if (hr_printer->is_active()) { |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1733 HeapRegionLinkedListIterator iter(&local_cleanup_list); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1734 while (iter.more_available()) { |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1735 HeapRegion* hr = iter.get_next(); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1736 hr_printer->cleanup(hr); |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1737 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1738 } |
|
5f6f2615433a
7049999: G1: Make the G1PrintHeapRegions output consistent and complete
tonyp
parents:
3776
diff
changeset
|
1739 |
| 2173 | 1740 _cleanup_list->add_as_tail(&local_cleanup_list); |
| 1741 assert(local_cleanup_list.is_empty(), "post-condition"); | |
| 1742 | |
| 1743 HeapRegionRemSet::finish_cleanup_task(&hrrs_cleanup_task); | |
| 342 | 1744 } |
| 1745 } | |
| 1746 size_t max_live_bytes() { return _max_live_bytes; } | |
| 1747 size_t freed_bytes() { return _freed_bytes; } | |
| 1748 }; | |
| 1749 | |
| 1750 class G1ParScrubRemSetTask: public AbstractGangTask { | |
| 1751 protected: | |
| 1752 G1RemSet* _g1rs; | |
| 1753 BitMap* _region_bm; | |
| 1754 BitMap* _card_bm; | |
| 1755 public: | |
| 1756 G1ParScrubRemSetTask(G1CollectedHeap* g1h, | |
| 1757 BitMap* region_bm, BitMap* card_bm) : | |
| 1758 AbstractGangTask("G1 ScrubRS"), _g1rs(g1h->g1_rem_set()), | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1759 _region_bm(region_bm), _card_bm(card_bm) { } |
| 342 | 1760 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1761 void work(uint worker_id) { |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
1762 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1763 _g1rs->scrub_par(_region_bm, _card_bm, worker_id, |
| 355 | 1764 HeapRegion::ScrubRemSetClaimValue); |
| 342 | 1765 } else { |
| 1766 _g1rs->scrub(_region_bm, _card_bm); | |
| 1767 } | |
| 1768 } | |
| 1769 | |
| 1770 }; | |
| 1771 | |
| 1772 void ConcurrentMark::cleanup() { | |
| 1773 // world is stopped at this checkpoint | |
| 1774 assert(SafepointSynchronize::is_at_safepoint(), | |
| 1775 "world should be stopped"); | |
| 1776 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
| 1777 | |
| 1778 // If a full collection has happened, we shouldn't do this. | |
| 1779 if (has_aborted()) { | |
| 1780 g1h->set_marking_complete(); // So bitmap clearing isn't confused | |
| 1781 return; | |
| 1782 } | |
| 1783 | |
| 4072 | 1784 HRSPhaseSetter x(HRSPhaseCleanup); |
| 2152 | 1785 g1h->verify_region_sets_optional(); |
| 1786 | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1787 if (VerifyDuringGC) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1788 HandleMark hm; // handle scope |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1789 gclog_or_tty->print(" VerifyDuringGC:(before)"); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1790 Universe::heap()->prepare_for_verify(); |
| 6008 | 1791 Universe::verify(/* silent */ false, |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1792 /* option */ VerifyOption_G1UsePrevMarking); |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1793 } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1794 |
| 342 | 1795 G1CollectorPolicy* g1p = G1CollectedHeap::heap()->g1_policy(); |
| 1796 g1p->record_concurrent_mark_cleanup_start(); | |
| 1797 | |
| 1798 double start = os::elapsedTime(); | |
| 1799 | |
| 2173 | 1800 HeapRegionRemSet::reset_for_cleanup_tasks(); |
| 1801 | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1802 uint n_workers; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1803 |
| 342 | 1804 // Do counting once more with the world stopped for good measure. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1805 G1ParFinalCountTask g1_par_count_task(g1h, &_region_bm, &_card_bm); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1806 |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
1807 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1808 assert(g1h->check_heap_region_claim_values(HeapRegion::InitialClaimValue), |
| 355 | 1809 "sanity check"); |
| 1810 | |
| 4711 | 1811 g1h->set_par_threads(); |
| 1812 n_workers = g1h->n_par_threads(); | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
1813 assert(g1h->n_par_threads() == n_workers, |
| 4711 | 1814 "Should not have been reset"); |
| 342 | 1815 g1h->workers()->run_task(&g1_par_count_task); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1816 // Done with the parallel phase so reset to 0. |
| 342 | 1817 g1h->set_par_threads(0); |
| 355 | 1818 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1819 assert(g1h->check_heap_region_claim_values(HeapRegion::FinalCountClaimValue), |
| 355 | 1820 "sanity check"); |
| 342 | 1821 } else { |
| 4711 | 1822 n_workers = 1; |
| 342 | 1823 g1_par_count_task.work(0); |
| 1824 } | |
| 1825 | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1826 if (VerifyDuringGC) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1827 // Verify that the counting data accumulated during marking matches |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1828 // that calculated by walking the marking bitmap. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1829 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1830 // Bitmaps to hold expected values |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1831 BitMap expected_region_bm(_region_bm.size(), false); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1832 BitMap expected_card_bm(_card_bm.size(), false); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1833 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1834 G1ParVerifyFinalCountTask g1_par_verify_task(g1h, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1835 &_region_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1836 &_card_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1837 &expected_region_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1838 &expected_card_bm); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1839 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1840 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1841 g1h->set_par_threads((int)n_workers); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1842 g1h->workers()->run_task(&g1_par_verify_task); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1843 // Done with the parallel phase so reset to 0. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1844 g1h->set_par_threads(0); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1845 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1846 assert(g1h->check_heap_region_claim_values(HeapRegion::VerifyCountClaimValue), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1847 "sanity check"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1848 } else { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1849 g1_par_verify_task.work(0); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1850 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1851 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1852 guarantee(g1_par_verify_task.failures() == 0, "Unexpected accounting failures"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1853 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
1854 |
| 342 | 1855 size_t start_used_bytes = g1h->used(); |
| 1856 g1h->set_marking_complete(); | |
| 1857 | |
| 1858 double count_end = os::elapsedTime(); | |
| 1859 double this_final_counting_time = (count_end - start); | |
| 1860 _total_counting_time += this_final_counting_time; | |
| 1861 | |
|
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
1862 if (G1PrintRegionLivenessInfo) { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
1863 G1PrintRegionLivenessInfoClosure cl(gclog_or_tty, "Post-Marking"); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
1864 _g1h->heap_region_iterate(&cl); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
1865 } |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
1866 |
| 342 | 1867 // Install newly created mark bitMap as "prev". |
| 1868 swapMarkBitMaps(); | |
| 1869 | |
| 1870 g1h->reset_gc_time_stamp(); | |
| 1871 | |
| 1872 // Note end of marking in all heap regions. | |
| 2152 | 1873 G1ParNoteEndTask g1_par_note_end_task(g1h, &_cleanup_list); |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
1874 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1875 g1h->set_par_threads((int)n_workers); |
| 342 | 1876 g1h->workers()->run_task(&g1_par_note_end_task); |
| 1877 g1h->set_par_threads(0); | |
| 355 | 1878 |
| 1879 assert(g1h->check_heap_region_claim_values(HeapRegion::NoteEndClaimValue), | |
| 1880 "sanity check"); | |
| 342 | 1881 } else { |
| 1882 g1_par_note_end_task.work(0); | |
| 1883 } | |
| 2152 | 1884 |
| 1885 if (!cleanup_list_is_empty()) { | |
| 1886 // The cleanup list is not empty, so we'll have to process it | |
| 1887 // concurrently. Notify anyone else that might be wanting free | |
| 1888 // regions that there will be more free regions coming soon. | |
| 1889 g1h->set_free_regions_coming(); | |
| 1890 } | |
| 342 | 1891 |
| 1892 // call below, since it affects the metric by which we sort the heap | |
| 1893 // regions. | |
| 1894 if (G1ScrubRemSets) { | |
| 1895 double rs_scrub_start = os::elapsedTime(); | |
| 1896 G1ParScrubRemSetTask g1_par_scrub_rs_task(g1h, &_region_bm, &_card_bm); | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
1897 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1898 g1h->set_par_threads((int)n_workers); |
| 342 | 1899 g1h->workers()->run_task(&g1_par_scrub_rs_task); |
| 1900 g1h->set_par_threads(0); | |
| 355 | 1901 |
| 1902 assert(g1h->check_heap_region_claim_values( | |
| 1903 HeapRegion::ScrubRemSetClaimValue), | |
| 1904 "sanity check"); | |
| 342 | 1905 } else { |
| 1906 g1_par_scrub_rs_task.work(0); | |
| 1907 } | |
| 1908 | |
| 1909 double rs_scrub_end = os::elapsedTime(); | |
| 1910 double this_rs_scrub_time = (rs_scrub_end - rs_scrub_start); | |
| 1911 _total_rs_scrub_time += this_rs_scrub_time; | |
| 1912 } | |
| 1913 | |
| 1914 // this will also free any regions totally full of garbage objects, | |
| 1915 // and sort the regions. | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
1916 g1h->g1_policy()->record_concurrent_mark_cleanup_end((int)n_workers); |
| 342 | 1917 |
| 1918 // Statistics. | |
| 1919 double end = os::elapsedTime(); | |
| 1920 _cleanup_times.add((end - start) * 1000.0); | |
| 1921 | |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5988
diff
changeset
|
1922 if (G1Log::fine()) { |
| 342 | 1923 g1h->print_size_transition(gclog_or_tty, |
| 1924 start_used_bytes, | |
| 1925 g1h->used(), | |
| 1926 g1h->capacity()); | |
| 1927 } | |
| 1928 | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
1929 // Clean up will have freed any regions completely full of garbage. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
1930 // Update the soft reference policy with the new heap occupancy. |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
1931 Universe::update_heap_info_at_gc(); |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
1932 |
| 342 | 1933 // We need to make this be a "collection" so any collection pause that |
| 1934 // races with it goes around and waits for completeCleanup to finish. | |
| 1935 g1h->increment_total_collections(); | |
| 1936 | |
|
4830
0b3d1ec6eaee
7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents:
4828
diff
changeset
|
1937 // We reclaimed old regions so we should calculate the sizes to make |
|
0b3d1ec6eaee
7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents:
4828
diff
changeset
|
1938 // sure we update the old gen/space data. |
|
0b3d1ec6eaee
7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents:
4828
diff
changeset
|
1939 g1h->g1mm()->update_sizes(); |
|
0b3d1ec6eaee
7097586: G1: improve the per-space output when using jmap -heap
tonyp
parents:
4828
diff
changeset
|
1940 |
| 751 | 1941 if (VerifyDuringGC) { |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1942 HandleMark hm; // handle scope |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1943 gclog_or_tty->print(" VerifyDuringGC:(after)"); |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
1944 Universe::heap()->prepare_for_verify(); |
| 6008 | 1945 Universe::verify(/* silent */ false, |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
1946 /* option */ VerifyOption_G1UsePrevMarking); |
| 342 | 1947 } |
| 2152 | 1948 |
| 1949 g1h->verify_region_sets_optional(); | |
| 342 | 1950 } |
| 1951 | |
| 1952 void ConcurrentMark::completeCleanup() { | |
| 1953 if (has_aborted()) return; | |
| 1954 | |
| 2152 | 1955 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
| 1956 | |
| 1957 _cleanup_list.verify_optional(); | |
| 2361 | 1958 FreeRegionList tmp_free_list("Tmp Free List"); |
| 2152 | 1959 |
| 1960 if (G1ConcRegionFreeingVerbose) { | |
| 1961 gclog_or_tty->print_cr("G1ConcRegionFreeing [complete cleanup] : " | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1962 "cleanup list has %u entries", |
| 2152 | 1963 _cleanup_list.length()); |
| 1964 } | |
| 1965 | |
| 1966 // Noone else should be accessing the _cleanup_list at this point, | |
| 1967 // so it's not necessary to take any locks | |
| 1968 while (!_cleanup_list.is_empty()) { | |
| 1969 HeapRegion* hr = _cleanup_list.remove_head(); | |
| 1970 assert(hr != NULL, "the list was not empty"); | |
|
3317
063382f9b575
7035144: G1: nightly failure: Non-dirty cards in region that should be dirty (failures still exist...)
tonyp
parents:
3316
diff
changeset
|
1971 hr->par_clear(); |
| 2361 | 1972 tmp_free_list.add_as_tail(hr); |
| 2152 | 1973 |
| 1974 // Instead of adding one region at a time to the secondary_free_list, | |
| 1975 // we accumulate them in the local list and move them a few at a | |
| 1976 // time. This also cuts down on the number of notify_all() calls | |
| 1977 // we do during this process. We'll also append the local list when | |
| 1978 // _cleanup_list is empty (which means we just removed the last | |
| 1979 // region from the _cleanup_list). | |
| 2361 | 1980 if ((tmp_free_list.length() % G1SecondaryFreeListAppendLength == 0) || |
| 2152 | 1981 _cleanup_list.is_empty()) { |
| 1982 if (G1ConcRegionFreeingVerbose) { | |
| 1983 gclog_or_tty->print_cr("G1ConcRegionFreeing [complete cleanup] : " | |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1984 "appending %u entries to the secondary_free_list, " |
|
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
1985 "cleanup list still has %u entries", |
| 2361 | 1986 tmp_free_list.length(), |
| 2152 | 1987 _cleanup_list.length()); |
| 342 | 1988 } |
| 2152 | 1989 |
| 1990 { | |
| 1991 MutexLockerEx x(SecondaryFreeList_lock, Mutex::_no_safepoint_check_flag); | |
| 2361 | 1992 g1h->secondary_free_list_add_as_tail(&tmp_free_list); |
| 2152 | 1993 SecondaryFreeList_lock->notify_all(); |
| 1994 } | |
| 1995 | |
| 1996 if (G1StressConcRegionFreeing) { | |
| 1997 for (uintx i = 0; i < G1StressConcRegionFreeingDelayMillis; ++i) { | |
| 1998 os::sleep(Thread::current(), (jlong) 1, false); | |
| 1999 } | |
| 2000 } | |
| 342 | 2001 } |
| 2002 } | |
| 2361 | 2003 assert(tmp_free_list.is_empty(), "post-condition"); |
| 342 | 2004 } |
| 2005 | |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2006 // Support closures for reference procssing in G1 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2007 |
|
2037
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
2008 bool G1CMIsAliveClosure::do_object_b(oop obj) { |
|
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
2009 HeapWord* addr = (HeapWord*)obj; |
|
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
2010 return addr != NULL && |
|
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
2011 (!_g1->is_in_g1_reserved(addr) || !_g1->is_obj_ill(obj)); |
|
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
2012 } |
| 342 | 2013 |
| 2014 class G1CMKeepAliveClosure: public OopClosure { | |
| 2015 G1CollectedHeap* _g1; | |
| 2016 ConcurrentMark* _cm; | |
| 2017 public: | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2018 G1CMKeepAliveClosure(G1CollectedHeap* g1, ConcurrentMark* cm) : |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2019 _g1(g1), _cm(cm) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2020 assert(Thread::current()->is_VM_thread(), "otherwise fix worker id"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2021 } |
| 342 | 2022 |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2023 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2024 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2025 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2026 template <class T> void do_oop_work(T* p) { |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2027 oop obj = oopDesc::load_decode_heap_oop(p); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2028 HeapWord* addr = (HeapWord*)obj; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2029 |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2030 if (_cm->verbose_high()) { |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2031 gclog_or_tty->print_cr("\t[0] we're looking at location " |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2032 "*"PTR_FORMAT" = "PTR_FORMAT, |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2033 p, (void*) obj); |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2034 } |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2035 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2036 if (_g1->is_in_g1_reserved(addr) && _g1->is_obj_ill(obj)) { |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2037 _cm->mark_and_count(obj); |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2038 _cm->mark_stack_push(obj); |
| 342 | 2039 } |
| 2040 } | |
| 2041 }; | |
| 2042 | |
| 2043 class G1CMDrainMarkingStackClosure: public VoidClosure { | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2044 ConcurrentMark* _cm; |
| 342 | 2045 CMMarkStack* _markStack; |
| 2046 G1CMKeepAliveClosure* _oopClosure; | |
| 2047 public: | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2048 G1CMDrainMarkingStackClosure(ConcurrentMark* cm, CMMarkStack* markStack, |
| 342 | 2049 G1CMKeepAliveClosure* oopClosure) : |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2050 _cm(cm), |
| 342 | 2051 _markStack(markStack), |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2052 _oopClosure(oopClosure) { } |
| 342 | 2053 |
| 2054 void do_void() { | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2055 _markStack->drain((OopClosure*)_oopClosure, _cm->nextMarkBitMap(), false); |
| 342 | 2056 } |
| 2057 }; | |
| 2058 | |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2059 // 'Keep Alive' closure used by parallel reference processing. |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2060 // An instance of this closure is used in the parallel reference processing |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2061 // code rather than an instance of G1CMKeepAliveClosure. We could have used |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2062 // the G1CMKeepAliveClosure as it is MT-safe. Also reference objects are |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2063 // placed on to discovered ref lists once so we can mark and push with no |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2064 // need to check whether the object has already been marked. Using the |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2065 // G1CMKeepAliveClosure would mean, however, having all the worker threads |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2066 // operating on the global mark stack. This means that an individual |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2067 // worker would be doing lock-free pushes while it processes its own |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2068 // discovered ref list followed by drain call. If the discovered ref lists |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2069 // are unbalanced then this could cause interference with the other |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2070 // workers. Using a CMTask (and its embedded local data structures) |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2071 // avoids that potential interference. |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2072 class G1CMParKeepAliveAndDrainClosure: public OopClosure { |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2073 ConcurrentMark* _cm; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2074 CMTask* _task; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2075 int _ref_counter_limit; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2076 int _ref_counter; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2077 public: |
|
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2078 G1CMParKeepAliveAndDrainClosure(ConcurrentMark* cm, CMTask* task) : |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2079 _cm(cm), _task(task), |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2080 _ref_counter_limit(G1RefProcDrainInterval) { |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2081 assert(_ref_counter_limit > 0, "sanity"); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2082 _ref_counter = _ref_counter_limit; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2083 } |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2084 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2085 virtual void do_oop(narrowOop* p) { do_oop_work(p); } |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2086 virtual void do_oop( oop* p) { do_oop_work(p); } |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2087 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2088 template <class T> void do_oop_work(T* p) { |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2089 if (!_cm->has_overflown()) { |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2090 oop obj = oopDesc::load_decode_heap_oop(p); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2091 if (_cm->verbose_high()) { |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2092 gclog_or_tty->print_cr("\t[%d] we're looking at location " |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2093 "*"PTR_FORMAT" = "PTR_FORMAT, |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2094 _task->task_id(), p, (void*) obj); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2095 } |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2096 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2097 _task->deal_with_reference(obj); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2098 _ref_counter--; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2099 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2100 if (_ref_counter == 0) { |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2101 // We have dealt with _ref_counter_limit references, pushing them and objects |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2102 // reachable from them on to the local stack (and possibly the global stack). |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2103 // Call do_marking_step() to process these entries. We call the routine in a |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2104 // loop, which we'll exit if there's nothing more to do (i.e. we're done |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2105 // with the entries that we've pushed as a result of the deal_with_reference |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2106 // calls above) or we overflow. |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2107 // Note: CMTask::do_marking_step() can set the CMTask::has_aborted() flag |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2108 // while there may still be some work to do. (See the comment at the |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2109 // beginning of CMTask::do_marking_step() for those conditions - one of which |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2110 // is reaching the specified time target.) It is only when |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2111 // CMTask::do_marking_step() returns without setting the has_aborted() flag |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2112 // that the marking has completed. |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2113 do { |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2114 double mark_step_duration_ms = G1ConcMarkStepDurationMillis; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2115 _task->do_marking_step(mark_step_duration_ms, |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2116 false /* do_stealing */, |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2117 false /* do_termination */); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2118 } while (_task->has_aborted() && !_cm->has_overflown()); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2119 _ref_counter = _ref_counter_limit; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2120 } |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2121 } else { |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2122 if (_cm->verbose_high()) { |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2123 gclog_or_tty->print_cr("\t[%d] CM Overflow", _task->task_id()); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2124 } |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2125 } |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2126 } |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2127 }; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2128 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2129 class G1CMParDrainMarkingStackClosure: public VoidClosure { |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2130 ConcurrentMark* _cm; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2131 CMTask* _task; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2132 public: |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2133 G1CMParDrainMarkingStackClosure(ConcurrentMark* cm, CMTask* task) : |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2134 _cm(cm), _task(task) { } |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2135 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2136 void do_void() { |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2137 do { |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2138 if (_cm->verbose_high()) { |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2139 gclog_or_tty->print_cr("\t[%d] Drain: Calling do marking_step", |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2140 _task->task_id()); |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2141 } |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2142 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2143 // We call CMTask::do_marking_step() to completely drain the local and |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2144 // global marking stacks. The routine is called in a loop, which we'll |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2145 // exit if there's nothing more to do (i.e. we'completely drained the |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2146 // entries that were pushed as a result of applying the |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2147 // G1CMParKeepAliveAndDrainClosure to the entries on the discovered ref |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2148 // lists above) or we overflow the global marking stack. |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2149 // Note: CMTask::do_marking_step() can set the CMTask::has_aborted() flag |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2150 // while there may still be some work to do. (See the comment at the |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2151 // beginning of CMTask::do_marking_step() for those conditions - one of which |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2152 // is reaching the specified time target.) It is only when |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2153 // CMTask::do_marking_step() returns without setting the has_aborted() flag |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2154 // that the marking has completed. |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2155 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2156 _task->do_marking_step(1000000000.0 /* something very large */, |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2157 true /* do_stealing */, |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2158 true /* do_termination */); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2159 } while (_task->has_aborted() && !_cm->has_overflown()); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2160 } |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2161 }; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2162 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2163 // Implementation of AbstractRefProcTaskExecutor for parallel |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2164 // reference processing at the end of G1 concurrent marking |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2165 |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2166 class G1CMRefProcTaskExecutor: public AbstractRefProcTaskExecutor { |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2167 private: |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2168 G1CollectedHeap* _g1h; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2169 ConcurrentMark* _cm; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2170 WorkGang* _workers; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2171 int _active_workers; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2172 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2173 public: |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2174 G1CMRefProcTaskExecutor(G1CollectedHeap* g1h, |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2175 ConcurrentMark* cm, |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2176 WorkGang* workers, |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2177 int n_workers) : |
|
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2178 _g1h(g1h), _cm(cm), |
|
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2179 _workers(workers), _active_workers(n_workers) { } |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2180 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2181 // Executes the given task using concurrent marking worker threads. |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2182 virtual void execute(ProcessTask& task); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2183 virtual void execute(EnqueueTask& task); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2184 }; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2185 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2186 class G1CMRefProcTaskProxy: public AbstractGangTask { |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2187 typedef AbstractRefProcTaskExecutor::ProcessTask ProcessTask; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2188 ProcessTask& _proc_task; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2189 G1CollectedHeap* _g1h; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2190 ConcurrentMark* _cm; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2191 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2192 public: |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2193 G1CMRefProcTaskProxy(ProcessTask& proc_task, |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2194 G1CollectedHeap* g1h, |
|
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2195 ConcurrentMark* cm) : |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2196 AbstractGangTask("Process reference objects in parallel"), |
|
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2197 _proc_task(proc_task), _g1h(g1h), _cm(cm) { } |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2198 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2199 virtual void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2200 CMTask* marking_task = _cm->task(worker_id); |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2201 G1CMIsAliveClosure g1_is_alive(_g1h); |
|
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2202 G1CMParKeepAliveAndDrainClosure g1_par_keep_alive(_cm, marking_task); |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2203 G1CMParDrainMarkingStackClosure g1_par_drain(_cm, marking_task); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2204 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2205 _proc_task.work(worker_id, g1_is_alive, g1_par_keep_alive, g1_par_drain); |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2206 } |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2207 }; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2208 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2209 void G1CMRefProcTaskExecutor::execute(ProcessTask& proc_task) { |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2210 assert(_workers != NULL, "Need parallel worker threads."); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2211 |
|
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2212 G1CMRefProcTaskProxy proc_task_proxy(proc_task, _g1h, _cm); |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2213 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2214 // We need to reset the phase for each task execution so that |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2215 // the termination protocol of CMTask::do_marking_step works. |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2216 _cm->set_phase(_active_workers, false /* concurrent */); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2217 _g1h->set_par_threads(_active_workers); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2218 _workers->run_task(&proc_task_proxy); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2219 _g1h->set_par_threads(0); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2220 } |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2221 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2222 class G1CMRefEnqueueTaskProxy: public AbstractGangTask { |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2223 typedef AbstractRefProcTaskExecutor::EnqueueTask EnqueueTask; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2224 EnqueueTask& _enq_task; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2225 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2226 public: |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2227 G1CMRefEnqueueTaskProxy(EnqueueTask& enq_task) : |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2228 AbstractGangTask("Enqueue reference objects in parallel"), |
|
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2229 _enq_task(enq_task) { } |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2230 |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2231 virtual void work(uint worker_id) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2232 _enq_task.work(worker_id); |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2233 } |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2234 }; |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2235 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2236 void G1CMRefProcTaskExecutor::execute(EnqueueTask& enq_task) { |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2237 assert(_workers != NULL, "Need parallel worker threads."); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2238 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2239 G1CMRefEnqueueTaskProxy enq_task_proxy(enq_task); |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2240 |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2241 _g1h->set_par_threads(_active_workers); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2242 _workers->run_task(&enq_task_proxy); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2243 _g1h->set_par_threads(0); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2244 } |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2245 |
| 342 | 2246 void ConcurrentMark::weakRefsWork(bool clear_all_soft_refs) { |
| 2247 ResourceMark rm; | |
| 2248 HandleMark hm; | |
|
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2249 |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2250 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2251 |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2252 // Is alive closure. |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2253 G1CMIsAliveClosure g1_is_alive(g1h); |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2254 |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2255 // Inner scope to exclude the cleaning of the string and symbol |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2256 // tables from the displayed time. |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2257 { |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5988
diff
changeset
|
2258 if (G1Log::finer()) { |
|
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2259 gclog_or_tty->put(' '); |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2260 } |
|
6007
5c86f8211d1e
7160728: Introduce an extra logging level for G1 logging
brutisso
parents:
5988
diff
changeset
|
2261 TraceTime t("GC ref-proc", G1Log::finer(), false, gclog_or_tty); |
|
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2262 |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2263 ReferenceProcessor* rp = g1h->ref_processor_cm(); |
|
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2264 |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2265 // See the comment in G1CollectedHeap::ref_processing_init() |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2266 // about how reference processing currently works in G1. |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2267 |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2268 // Process weak references. |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2269 rp->setup_policy(clear_all_soft_refs); |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2270 assert(_markStack.isEmpty(), "mark stack should be empty"); |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2271 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2272 G1CMKeepAliveClosure g1_keep_alive(g1h, this); |
|
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2273 G1CMDrainMarkingStackClosure |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2274 g1_drain_mark_stack(this, &_markStack, &g1_keep_alive); |
|
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2275 |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2276 // We use the work gang from the G1CollectedHeap and we utilize all |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2277 // the worker threads. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2278 uint active_workers = g1h->workers() ? g1h->workers()->active_workers() : 1U; |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2279 active_workers = MAX2(MIN2(active_workers, _max_task_num), 1U); |
|
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2280 |
|
4093
6071e0581859
7111795: G1: Various cleanups identified during walk through of changes for 6484965
johnc
parents:
4072
diff
changeset
|
2281 G1CMRefProcTaskExecutor par_task_executor(g1h, this, |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2282 g1h->workers(), active_workers); |
|
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2283 |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2284 if (rp->processing_is_mt()) { |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2285 // Set the degree of MT here. If the discovery is done MT, there |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2286 // may have been a different number of threads doing the discovery |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2287 // and a different number of discovered lists may have Ref objects. |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2288 // That is OK as long as the Reference lists are balanced (see |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2289 // balance_all_queues() and balance_queues()). |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2290 rp->set_active_mt_degree(active_workers); |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2291 |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2292 rp->process_discovered_references(&g1_is_alive, |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2293 &g1_keep_alive, |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2294 &g1_drain_mark_stack, |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2295 &par_task_executor); |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2296 |
|
3975
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2297 // The work routines of the parallel keep_alive and drain_marking_stack |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2298 // will set the has_overflown flag if we overflow the global marking |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2299 // stack. |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2300 } else { |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2301 rp->process_discovered_references(&g1_is_alive, |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2302 &g1_keep_alive, |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2303 &g1_drain_mark_stack, |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2304 NULL); |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2305 } |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2306 |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2307 assert(_markStack.overflow() || _markStack.isEmpty(), |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2308 "mark stack should be empty (unless it overflowed)"); |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2309 if (_markStack.overflow()) { |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2310 // Should have been done already when we tried to push an |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2311 // entry on to the global mark stack. But let's do it again. |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2312 set_has_overflown(); |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2313 } |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2314 |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2315 if (rp->processing_is_mt()) { |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2316 assert(rp->num_q() == active_workers, "why not"); |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2317 rp->enqueue_discovered_references(&par_task_executor); |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2318 } else { |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2319 rp->enqueue_discovered_references(); |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2320 } |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2321 |
|
1847b501ae74
7068215: G1: Print reference processing time during remark
johnc
parents:
3914
diff
changeset
|
2322 rp->verify_no_references_recorded(); |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
2323 assert(!rp->discovery_enabled(), "Post condition"); |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2324 } |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2325 |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2175
diff
changeset
|
2326 // Now clean up stale oops in StringTable |
|
2037
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1974
diff
changeset
|
2327 StringTable::unlink(&g1_is_alive); |
|
2177
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2175
diff
changeset
|
2328 // Clean up unreferenced symbols in symbol table. |
|
3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
coleenp
parents:
2175
diff
changeset
|
2329 SymbolTable::unlink(); |
| 342 | 2330 } |
| 2331 | |
| 2332 void ConcurrentMark::swapMarkBitMaps() { | |
| 2333 CMBitMapRO* temp = _prevMarkBitMap; | |
| 2334 _prevMarkBitMap = (CMBitMapRO*)_nextMarkBitMap; | |
| 2335 _nextMarkBitMap = (CMBitMap*) temp; | |
| 2336 } | |
| 2337 | |
| 2338 class CMRemarkTask: public AbstractGangTask { | |
| 2339 private: | |
| 2340 ConcurrentMark *_cm; | |
| 2341 | |
| 2342 public: | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2343 void work(uint worker_id) { |
| 342 | 2344 // Since all available tasks are actually started, we should |
| 2345 // only proceed if we're supposed to be actived. | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2346 if (worker_id < _cm->active_tasks()) { |
|
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2347 CMTask* task = _cm->task(worker_id); |
| 342 | 2348 task->record_start_time(); |
| 2349 do { | |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2350 task->do_marking_step(1000000000.0 /* something very large */, |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2351 true /* do_stealing */, |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2352 true /* do_termination */); |
| 342 | 2353 } while (task->has_aborted() && !_cm->has_overflown()); |
| 2354 // If we overflow, then we do not want to restart. We instead | |
| 2355 // want to abort remark and do concurrent marking again. | |
| 2356 task->record_end_time(); | |
| 2357 } | |
| 2358 } | |
| 2359 | |
| 4711 | 2360 CMRemarkTask(ConcurrentMark* cm, int active_workers) : |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2361 AbstractGangTask("Par Remark"), _cm(cm) { |
| 4711 | 2362 _cm->terminator()->reset_for_reuse(active_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2363 } |
| 342 | 2364 }; |
| 2365 | |
| 2366 void ConcurrentMark::checkpointRootsFinalWork() { | |
| 2367 ResourceMark rm; | |
| 2368 HandleMark hm; | |
| 2369 G1CollectedHeap* g1h = G1CollectedHeap::heap(); | |
| 2370 | |
| 2371 g1h->ensure_parsability(false); | |
| 2372 | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
2373 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
912
diff
changeset
|
2374 G1CollectedHeap::StrongRootsScope srs(g1h); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2375 // this is remark, so we'll use up all active threads |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2376 uint active_workers = g1h->workers()->active_workers(); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2377 if (active_workers == 0) { |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2378 assert(active_workers > 0, "Should have been set earlier"); |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2379 active_workers = (uint) ParallelGCThreads; |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2380 g1h->workers()->set_active_workers(active_workers); |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2381 } |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2382 set_phase(active_workers, false /* concurrent */); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2383 // Leave _parallel_marking_threads at it's |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2384 // value originally calculated in the ConcurrentMark |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2385 // constructor and pass values of the active workers |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2386 // through the gang in the task. |
| 342 | 2387 |
| 4711 | 2388 CMRemarkTask remarkTask(this, active_workers); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
4093
diff
changeset
|
2389 g1h->set_par_threads(active_workers); |
| 342 | 2390 g1h->workers()->run_task(&remarkTask); |
| 2391 g1h->set_par_threads(0); | |
| 2392 } else { | |
|
989
148e5441d916
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
912
diff
changeset
|
2393 G1CollectedHeap::StrongRootsScope srs(g1h); |
| 342 | 2394 // this is remark, so we'll use up all available threads |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
2395 uint active_workers = 1; |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
2396 set_phase(active_workers, false /* concurrent */); |
| 342 | 2397 |
| 4711 | 2398 CMRemarkTask remarkTask(this, active_workers); |
| 342 | 2399 // We will start all available threads, even if we decide that the |
| 2400 // active_workers will be fewer. The extra ones will just bail out | |
| 2401 // immediately. | |
| 2402 remarkTask.work(0); | |
| 2403 } | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2404 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2405 guarantee(satb_mq_set.completed_buffers_num() == 0, "invariant"); |
| 342 | 2406 |
| 2407 print_stats(); | |
| 2408 | |
| 2409 #if VERIFY_OBJS_PROCESSED | |
| 2410 if (_scan_obj_cl.objs_processed != ThreadLocalObjQueue::objs_enqueued) { | |
| 2411 gclog_or_tty->print_cr("Processed = %d, enqueued = %d.", | |
| 2412 _scan_obj_cl.objs_processed, | |
| 2413 ThreadLocalObjQueue::objs_enqueued); | |
| 2414 guarantee(_scan_obj_cl.objs_processed == | |
| 2415 ThreadLocalObjQueue::objs_enqueued, | |
| 2416 "Different number of objs processed and enqueued."); | |
| 2417 } | |
| 2418 #endif | |
| 2419 } | |
| 2420 | |
| 1044 | 2421 #ifndef PRODUCT |
| 2422 | |
| 1388 | 2423 class PrintReachableOopClosure: public OopClosure { |
| 342 | 2424 private: |
| 2425 G1CollectedHeap* _g1h; | |
| 2426 outputStream* _out; | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2427 VerifyOption _vo; |
| 1388 | 2428 bool _all; |
| 342 | 2429 |
| 2430 public: | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2431 PrintReachableOopClosure(outputStream* out, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2432 VerifyOption vo, |
| 1388 | 2433 bool all) : |
| 1044 | 2434 _g1h(G1CollectedHeap::heap()), |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2435 _out(out), _vo(vo), _all(all) { } |
| 342 | 2436 |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2437 void do_oop(narrowOop* p) { do_oop_work(p); } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2438 void do_oop( oop* p) { do_oop_work(p); } |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2439 |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2440 template <class T> void do_oop_work(T* p) { |
|
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
831
diff
changeset
|
2441 oop obj = oopDesc::load_decode_heap_oop(p); |
| 342 | 2442 const char* str = NULL; |
| 2443 const char* str2 = ""; | |
| 2444 | |
| 1388 | 2445 if (obj == NULL) { |
| 2446 str = ""; | |
| 2447 } else if (!_g1h->is_in_g1_reserved(obj)) { | |
| 2448 str = " O"; | |
| 2449 } else { | |
| 342 | 2450 HeapRegion* hr = _g1h->heap_region_containing(obj); |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2451 guarantee(hr != NULL, "invariant"); |
| 1044 | 2452 bool over_tams = false; |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2453 bool marked = false; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2454 |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2455 switch (_vo) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2456 case VerifyOption_G1UsePrevMarking: |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2457 over_tams = hr->obj_allocated_since_prev_marking(obj); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2458 marked = _g1h->isMarkedPrev(obj); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2459 break; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2460 case VerifyOption_G1UseNextMarking: |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2461 over_tams = hr->obj_allocated_since_next_marking(obj); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2462 marked = _g1h->isMarkedNext(obj); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2463 break; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2464 case VerifyOption_G1UseMarkWord: |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2465 marked = obj->is_gc_marked(); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2466 break; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2467 default: |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2468 ShouldNotReachHere(); |
| 1044 | 2469 } |
| 2470 | |
| 2471 if (over_tams) { | |
| 1388 | 2472 str = " >"; |
| 2473 if (marked) { | |
| 342 | 2474 str2 = " AND MARKED"; |
| 1044 | 2475 } |
| 1388 | 2476 } else if (marked) { |
| 2477 str = " M"; | |
| 1044 | 2478 } else { |
| 1388 | 2479 str = " NOT"; |
| 1044 | 2480 } |
| 342 | 2481 } |
| 2482 | |
| 1388 | 2483 _out->print_cr(" "PTR_FORMAT": "PTR_FORMAT"%s%s", |
| 342 | 2484 p, (void*) obj, str, str2); |
| 2485 } | |
| 2486 }; | |
| 2487 | |
| 1388 | 2488 class PrintReachableObjectClosure : public ObjectClosure { |
| 342 | 2489 private: |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2490 G1CollectedHeap* _g1h; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2491 outputStream* _out; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2492 VerifyOption _vo; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2493 bool _all; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2494 HeapRegion* _hr; |
| 342 | 2495 |
| 2496 public: | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2497 PrintReachableObjectClosure(outputStream* out, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2498 VerifyOption vo, |
| 1388 | 2499 bool all, |
| 2500 HeapRegion* hr) : | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2501 _g1h(G1CollectedHeap::heap()), |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2502 _out(out), _vo(vo), _all(all), _hr(hr) { } |
| 1388 | 2503 |
| 2504 void do_object(oop o) { | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2505 bool over_tams = false; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2506 bool marked = false; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2507 |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2508 switch (_vo) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2509 case VerifyOption_G1UsePrevMarking: |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2510 over_tams = _hr->obj_allocated_since_prev_marking(o); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2511 marked = _g1h->isMarkedPrev(o); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2512 break; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2513 case VerifyOption_G1UseNextMarking: |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2514 over_tams = _hr->obj_allocated_since_next_marking(o); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2515 marked = _g1h->isMarkedNext(o); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2516 break; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2517 case VerifyOption_G1UseMarkWord: |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2518 marked = o->is_gc_marked(); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2519 break; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2520 default: |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2521 ShouldNotReachHere(); |
| 1388 | 2522 } |
| 2523 bool print_it = _all || over_tams || marked; | |
| 2524 | |
| 2525 if (print_it) { | |
| 2526 _out->print_cr(" "PTR_FORMAT"%s", | |
| 2527 o, (over_tams) ? " >" : (marked) ? " M" : ""); | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2528 PrintReachableOopClosure oopCl(_out, _vo, _all); |
| 1388 | 2529 o->oop_iterate(&oopCl); |
| 2530 } | |
| 342 | 2531 } |
| 2532 }; | |
| 2533 | |
| 1388 | 2534 class PrintReachableRegionClosure : public HeapRegionClosure { |
| 342 | 2535 private: |
| 2536 outputStream* _out; | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2537 VerifyOption _vo; |
| 1388 | 2538 bool _all; |
| 342 | 2539 |
| 2540 public: | |
| 2541 bool doHeapRegion(HeapRegion* hr) { | |
| 2542 HeapWord* b = hr->bottom(); | |
| 2543 HeapWord* e = hr->end(); | |
| 2544 HeapWord* t = hr->top(); | |
| 1044 | 2545 HeapWord* p = NULL; |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2546 |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2547 switch (_vo) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2548 case VerifyOption_G1UsePrevMarking: |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2549 p = hr->prev_top_at_mark_start(); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2550 break; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2551 case VerifyOption_G1UseNextMarking: |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2552 p = hr->next_top_at_mark_start(); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2553 break; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2554 case VerifyOption_G1UseMarkWord: |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2555 // When we are verifying marking using the mark word |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2556 // TAMS has no relevance. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2557 assert(p == NULL, "post-condition"); |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2558 break; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2559 default: |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2560 ShouldNotReachHere(); |
| 1044 | 2561 } |
| 342 | 2562 _out->print_cr("** ["PTR_FORMAT", "PTR_FORMAT"] top: "PTR_FORMAT" " |
| 1044 | 2563 "TAMS: "PTR_FORMAT, b, e, t, p); |
| 1388 | 2564 _out->cr(); |
| 2565 | |
| 2566 HeapWord* from = b; | |
| 2567 HeapWord* to = t; | |
| 2568 | |
| 2569 if (to > from) { | |
| 2570 _out->print_cr("Objects in ["PTR_FORMAT", "PTR_FORMAT"]", from, to); | |
| 2571 _out->cr(); | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2572 PrintReachableObjectClosure ocl(_out, _vo, _all, hr); |
| 1388 | 2573 hr->object_iterate_mem_careful(MemRegion(from, to), &ocl); |
| 2574 _out->cr(); | |
| 2575 } | |
| 342 | 2576 |
| 2577 return false; | |
| 2578 } | |
| 2579 | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2580 PrintReachableRegionClosure(outputStream* out, |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2581 VerifyOption vo, |
| 1388 | 2582 bool all) : |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2583 _out(out), _vo(vo), _all(all) { } |
| 342 | 2584 }; |
| 2585 | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2586 static const char* verify_option_to_tams(VerifyOption vo) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2587 switch (vo) { |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2588 case VerifyOption_G1UsePrevMarking: |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2589 return "PTAMS"; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2590 case VerifyOption_G1UseNextMarking: |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2591 return "NTAMS"; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2592 default: |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2593 return "NONE"; |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2594 } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2595 } |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2596 |
| 1388 | 2597 void ConcurrentMark::print_reachable(const char* str, |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2598 VerifyOption vo, |
| 1388 | 2599 bool all) { |
| 2600 gclog_or_tty->cr(); | |
| 2601 gclog_or_tty->print_cr("== Doing heap dump... "); | |
| 1044 | 2602 |
| 2603 if (G1PrintReachableBaseFile == NULL) { | |
| 2604 gclog_or_tty->print_cr(" #### error: no base file defined"); | |
| 2605 return; | |
| 2606 } | |
| 2607 | |
| 2608 if (strlen(G1PrintReachableBaseFile) + 1 + strlen(str) > | |
| 2609 (JVM_MAXPATHLEN - 1)) { | |
| 2610 gclog_or_tty->print_cr(" #### error: file name too long"); | |
| 2611 return; | |
| 2612 } | |
| 2613 | |
| 2614 char file_name[JVM_MAXPATHLEN]; | |
| 2615 sprintf(file_name, "%s.%s", G1PrintReachableBaseFile, str); | |
| 2616 gclog_or_tty->print_cr(" dumping to file %s", file_name); | |
| 2617 | |
| 2618 fileStream fout(file_name); | |
| 2619 if (!fout.is_open()) { | |
| 2620 gclog_or_tty->print_cr(" #### error: could not open file"); | |
| 2621 return; | |
| 2622 } | |
| 2623 | |
| 2624 outputStream* out = &fout; | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2625 out->print_cr("-- USING %s", verify_option_to_tams(vo)); |
| 1044 | 2626 out->cr(); |
| 2627 | |
| 1388 | 2628 out->print_cr("--- ITERATING OVER REGIONS"); |
| 1044 | 2629 out->cr(); |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
2630 PrintReachableRegionClosure rcl(out, vo, all); |
| 1388 | 2631 _g1h->heap_region_iterate(&rcl); |
| 1044 | 2632 out->cr(); |
| 2633 | |
| 2634 gclog_or_tty->print_cr(" done"); | |
| 1388 | 2635 gclog_or_tty->flush(); |
| 342 | 2636 } |
| 2637 | |
| 1044 | 2638 #endif // PRODUCT |
| 2639 | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2640 void ConcurrentMark::clearRangePrevBitmap(MemRegion mr) { |
| 342 | 2641 // Note we are overriding the read-only view of the prev map here, via |
| 2642 // the cast. | |
| 2643 ((CMBitMap*)_prevMarkBitMap)->clearRange(mr); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2644 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2645 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2646 void ConcurrentMark::clearRangeNextBitmap(MemRegion mr) { |
| 342 | 2647 _nextMarkBitMap->clearRange(mr); |
| 2648 } | |
| 2649 | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2650 void ConcurrentMark::clearRangeBothBitmaps(MemRegion mr) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2651 clearRangePrevBitmap(mr); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2652 clearRangeNextBitmap(mr); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2653 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2654 |
| 342 | 2655 HeapRegion* |
| 2656 ConcurrentMark::claim_region(int task_num) { | |
| 2657 // "checkpoint" the finger | |
| 2658 HeapWord* finger = _finger; | |
| 2659 | |
| 2660 // _heap_end will not change underneath our feet; it only changes at | |
| 2661 // yield points. | |
| 2662 while (finger < _heap_end) { | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2663 assert(_g1h->is_in_g1_reserved(finger), "invariant"); |
| 342 | 2664 |
| 3771 | 2665 // Note on how this code handles humongous regions. In the |
| 2666 // normal case the finger will reach the start of a "starts | |
| 2667 // humongous" (SH) region. Its end will either be the end of the | |
| 2668 // last "continues humongous" (CH) region in the sequence, or the | |
| 2669 // standard end of the SH region (if the SH is the only region in | |
| 2670 // the sequence). That way claim_region() will skip over the CH | |
| 2671 // regions. However, there is a subtle race between a CM thread | |
| 2672 // executing this method and a mutator thread doing a humongous | |
| 2673 // object allocation. The two are not mutually exclusive as the CM | |
| 2674 // thread does not need to hold the Heap_lock when it gets | |
| 2675 // here. So there is a chance that claim_region() will come across | |
| 2676 // a free region that's in the progress of becoming a SH or a CH | |
| 2677 // region. In the former case, it will either | |
| 2678 // a) Miss the update to the region's end, in which case it will | |
| 2679 // visit every subsequent CH region, will find their bitmaps | |
| 2680 // empty, and do nothing, or | |
| 2681 // b) Will observe the update of the region's end (in which case | |
| 2682 // it will skip the subsequent CH regions). | |
| 2683 // If it comes across a region that suddenly becomes CH, the | |
| 2684 // scenario will be similar to b). So, the race between | |
| 2685 // claim_region() and a humongous object allocation might force us | |
| 2686 // to do a bit of unnecessary work (due to some unnecessary bitmap | |
| 2687 // iterations) but it should not introduce and correctness issues. | |
| 2688 HeapRegion* curr_region = _g1h->heap_region_containing_raw(finger); | |
| 342 | 2689 HeapWord* bottom = curr_region->bottom(); |
| 2690 HeapWord* end = curr_region->end(); | |
| 2691 HeapWord* limit = curr_region->next_top_at_mark_start(); | |
| 2692 | |
| 3771 | 2693 if (verbose_low()) { |
| 342 | 2694 gclog_or_tty->print_cr("[%d] curr_region = "PTR_FORMAT" " |
| 2695 "["PTR_FORMAT", "PTR_FORMAT"), " | |
| 2696 "limit = "PTR_FORMAT, | |
| 2697 task_num, curr_region, bottom, end, limit); | |
| 3771 | 2698 } |
| 2699 | |
| 2700 // Is the gap between reading the finger and doing the CAS too long? | |
| 2701 HeapWord* res = (HeapWord*) Atomic::cmpxchg_ptr(end, &_finger, finger); | |
| 342 | 2702 if (res == finger) { |
| 2703 // we succeeded | |
| 2704 | |
| 2705 // notice that _finger == end cannot be guaranteed here since, | |
| 2706 // someone else might have moved the finger even further | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2707 assert(_finger >= end, "the finger should have moved forward"); |
| 342 | 2708 |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2709 if (verbose_low()) { |
| 342 | 2710 gclog_or_tty->print_cr("[%d] we were successful with region = " |
| 2711 PTR_FORMAT, task_num, curr_region); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2712 } |
| 342 | 2713 |
| 2714 if (limit > bottom) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2715 if (verbose_low()) { |
| 342 | 2716 gclog_or_tty->print_cr("[%d] region "PTR_FORMAT" is not empty, " |
| 2717 "returning it ", task_num, curr_region); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2718 } |
| 342 | 2719 return curr_region; |
| 2720 } else { | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2721 assert(limit == bottom, |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2722 "the region limit should be at bottom"); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2723 if (verbose_low()) { |
| 342 | 2724 gclog_or_tty->print_cr("[%d] region "PTR_FORMAT" is empty, " |
| 2725 "returning NULL", task_num, curr_region); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2726 } |
| 342 | 2727 // we return NULL and the caller should try calling |
| 2728 // claim_region() again. | |
| 2729 return NULL; | |
| 2730 } | |
| 2731 } else { | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
2732 assert(_finger > finger, "the finger should have moved forward"); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2733 if (verbose_low()) { |
| 342 | 2734 gclog_or_tty->print_cr("[%d] somebody else moved the finger, " |
| 2735 "global finger = "PTR_FORMAT", " | |
| 2736 "our finger = "PTR_FORMAT, | |
| 2737 task_num, _finger, finger); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
2738 } |
| 342 | 2739 |
| 2740 // read it again | |
| 2741 finger = _finger; | |
| 2742 } | |
| 2743 } | |
| 2744 | |
| 2745 return NULL; | |
| 2746 } | |
| 2747 | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2748 #ifndef PRODUCT |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2749 enum VerifyNoCSetOopsPhase { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2750 VerifyNoCSetOopsStack, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2751 VerifyNoCSetOopsQueues, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2752 VerifyNoCSetOopsSATBCompleted, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2753 VerifyNoCSetOopsSATBThread |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2754 }; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2755 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2756 class VerifyNoCSetOopsClosure : public OopClosure, public ObjectClosure { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2757 private: |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2758 G1CollectedHeap* _g1h; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2759 VerifyNoCSetOopsPhase _phase; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2760 int _info; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2761 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2762 const char* phase_str() { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2763 switch (_phase) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2764 case VerifyNoCSetOopsStack: return "Stack"; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2765 case VerifyNoCSetOopsQueues: return "Queue"; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2766 case VerifyNoCSetOopsSATBCompleted: return "Completed SATB Buffers"; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2767 case VerifyNoCSetOopsSATBThread: return "Thread SATB Buffers"; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2768 default: ShouldNotReachHere(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2769 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2770 return NULL; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2771 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2772 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2773 void do_object_work(oop obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2774 guarantee(!_g1h->obj_in_cs(obj), |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2775 err_msg("obj: "PTR_FORMAT" in CSet, phase: %s, info: %d", |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2776 (void*) obj, phase_str(), _info)); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2777 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2778 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2779 public: |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2780 VerifyNoCSetOopsClosure() : _g1h(G1CollectedHeap::heap()) { } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2781 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2782 void set_phase(VerifyNoCSetOopsPhase phase, int info = -1) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2783 _phase = phase; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2784 _info = info; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2785 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2786 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2787 virtual void do_oop(oop* p) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2788 oop obj = oopDesc::load_decode_heap_oop(p); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2789 do_object_work(obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2790 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2791 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2792 virtual void do_oop(narrowOop* p) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2793 // We should not come across narrow oops while scanning marking |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2794 // stacks and SATB buffers. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2795 ShouldNotReachHere(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2796 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2797 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2798 virtual void do_object(oop obj) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2799 do_object_work(obj); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2800 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2801 }; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2802 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2803 void ConcurrentMark::verify_no_cset_oops(bool verify_stacks, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2804 bool verify_enqueued_buffers, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2805 bool verify_thread_buffers, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2806 bool verify_fingers) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2807 assert(SafepointSynchronize::is_at_safepoint(), "should be at a safepoint"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2808 if (!G1CollectedHeap::heap()->mark_in_progress()) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2809 return; |
| 342 | 2810 } |
|
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2811 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2812 VerifyNoCSetOopsClosure cl; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2813 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2814 if (verify_stacks) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2815 // Verify entries on the global mark stack |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2816 cl.set_phase(VerifyNoCSetOopsStack); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2817 _markStack.oops_do(&cl); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2818 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2819 // Verify entries on the task queues |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2820 for (int i = 0; i < (int) _max_task_num; i += 1) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2821 cl.set_phase(VerifyNoCSetOopsQueues, i); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2822 OopTaskQueue* queue = _task_queues->queue(i); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2823 queue->oops_do(&cl); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2824 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2825 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2826 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2827 SATBMarkQueueSet& satb_qs = JavaThread::satb_mark_queue_set(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2828 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2829 // Verify entries on the enqueued SATB buffers |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2830 if (verify_enqueued_buffers) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2831 cl.set_phase(VerifyNoCSetOopsSATBCompleted); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2832 satb_qs.iterate_completed_buffers_read_only(&cl); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2833 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2834 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2835 // Verify entries on the per-thread SATB buffers |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2836 if (verify_thread_buffers) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2837 cl.set_phase(VerifyNoCSetOopsSATBThread); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2838 satb_qs.iterate_thread_buffers_read_only(&cl); |
|
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2839 } |
|
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
2840 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2841 if (verify_fingers) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2842 // Verify the global finger |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2843 HeapWord* global_finger = finger(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2844 if (global_finger != NULL && global_finger < _heap_end) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2845 // The global finger always points to a heap region boundary. We |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2846 // use heap_region_containing_raw() to get the containing region |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2847 // given that the global finger could be pointing to a free region |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2848 // which subsequently becomes continues humongous. If that |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2849 // happens, heap_region_containing() will return the bottom of the |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2850 // corresponding starts humongous region and the check below will |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2851 // not hold any more. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2852 HeapRegion* global_hr = _g1h->heap_region_containing_raw(global_finger); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2853 guarantee(global_finger == global_hr->bottom(), |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2854 err_msg("global finger: "PTR_FORMAT" region: "HR_FORMAT, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2855 global_finger, HR_FORMAT_PARAMS(global_hr))); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2856 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2857 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2858 // Verify the task fingers |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2859 assert(parallel_marking_threads() <= _max_task_num, "sanity"); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2860 for (int i = 0; i < (int) parallel_marking_threads(); i += 1) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2861 CMTask* task = _tasks[i]; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2862 HeapWord* task_finger = task->finger(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2863 if (task_finger != NULL && task_finger < _heap_end) { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2864 // See above note on the global finger verification. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2865 HeapRegion* task_hr = _g1h->heap_region_containing_raw(task_finger); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2866 guarantee(task_finger == task_hr->bottom() || |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2867 !task_hr->in_collection_set(), |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2868 err_msg("task finger: "PTR_FORMAT" region: "HR_FORMAT, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2869 task_finger, HR_FORMAT_PARAMS(task_hr))); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2870 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2871 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2872 } |
| 342 | 2873 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4783
diff
changeset
|
2874 #endif // PRODUCT |
| 342 | 2875 |
|
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
2876 void ConcurrentMark::clear_marking_state(bool clear_overflow) { |
| 342 | 2877 _markStack.setEmpty(); |
| 2878 _markStack.clear_overflow(); | |
|
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
2879 if (clear_overflow) { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
2880 clear_has_overflown(); |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
2881 } else { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
2882 assert(has_overflown(), "pre-condition"); |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
2883 } |
| 342 | 2884 _finger = _heap_start; |
| 2885 | |
| 2886 for (int i = 0; i < (int)_max_task_num; ++i) { | |
| 2887 OopTaskQueue* queue = _task_queues->queue(i); | |
| 2888 queue->set_empty(); | |
| 2889 } | |
| 2890 } | |
| 2891 | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2892 // Aggregate the counting data that was constructed concurrently |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2893 // with marking. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2894 class AggregateCountDataHRClosure: public HeapRegionClosure { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2895 ConcurrentMark* _cm; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2896 BitMap* _cm_card_bm; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2897 size_t _max_task_num; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2898 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2899 public: |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2900 AggregateCountDataHRClosure(ConcurrentMark *cm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2901 BitMap* cm_card_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2902 size_t max_task_num) : |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2903 _cm(cm), _cm_card_bm(cm_card_bm), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2904 _max_task_num(max_task_num) { } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2905 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2906 bool is_card_aligned(HeapWord* p) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2907 return ((uintptr_t(p) & (CardTableModRefBS::card_size - 1)) == 0); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2908 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2909 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2910 bool doHeapRegion(HeapRegion* hr) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2911 if (hr->continuesHumongous()) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2912 // We will ignore these here and process them when their |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2913 // associated "starts humongous" region is processed. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2914 // Note that we cannot rely on their associated |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2915 // "starts humongous" region to have their bit set to 1 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2916 // since, due to the region chunking in the parallel region |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2917 // iteration, a "continues humongous" region might be visited |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2918 // before its associated "starts humongous". |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2919 return false; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2920 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2921 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2922 HeapWord* start = hr->bottom(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2923 HeapWord* limit = hr->next_top_at_mark_start(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2924 HeapWord* end = hr->end(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2925 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2926 assert(start <= limit && limit <= hr->top() && hr->top() <= hr->end(), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2927 err_msg("Preconditions not met - " |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2928 "start: "PTR_FORMAT", limit: "PTR_FORMAT", " |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2929 "top: "PTR_FORMAT", end: "PTR_FORMAT, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2930 start, limit, hr->top(), hr->end())); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2931 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2932 assert(hr->next_marked_bytes() == 0, "Precondition"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2933 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2934 if (start == limit) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2935 // NTAMS of this region has not been set so nothing to do. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2936 return false; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2937 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2938 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2939 assert(is_card_aligned(start), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2940 assert(is_card_aligned(end), "sanity"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2941 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2942 BitMap::idx_t start_idx = _cm->card_bitmap_index_for(start); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2943 BitMap::idx_t limit_idx = _cm->card_bitmap_index_for(limit); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2944 BitMap::idx_t end_idx = _cm->card_bitmap_index_for(end); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2945 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2946 // If ntams is not card aligned then we bump the index for |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2947 // limit so that we get the card spanning ntams. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2948 if (!is_card_aligned(limit)) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2949 limit_idx += 1; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2950 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2951 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2952 assert(limit_idx <= end_idx, "or else use atomics"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2953 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2954 // Aggregate the "stripe" in the count data associated with hr. |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
2955 uint hrs_index = hr->hrs_index(); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2956 size_t marked_bytes = 0; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2957 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2958 for (int i = 0; (size_t)i < _max_task_num; i += 1) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2959 size_t* marked_bytes_array = _cm->count_marked_bytes_array_for(i); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2960 BitMap* task_card_bm = _cm->count_card_bitmap_for(i); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2961 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2962 // Fetch the marked_bytes in this region for task i and |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2963 // add it to the running total for this region. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2964 marked_bytes += marked_bytes_array[hrs_index]; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2965 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2966 // Now union the bitmaps[0,max_task_num)[start_idx..limit_idx) |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2967 // into the global card bitmap. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2968 BitMap::idx_t scan_idx = task_card_bm->get_next_one_offset(start_idx, limit_idx); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2969 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2970 while (scan_idx < limit_idx) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2971 assert(task_card_bm->at(scan_idx) == true, "should be"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2972 _cm_card_bm->set_bit(scan_idx); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2973 assert(_cm_card_bm->at(scan_idx) == true, "should be"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2974 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2975 // BitMap::get_next_one_offset() can handle the case when |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2976 // its left_offset parameter is greater than its right_offset |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2977 // parameter. If does, however, have an early exit if |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2978 // left_offset == right_offset. So let's limit the value |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2979 // passed in for left offset here. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2980 BitMap::idx_t next_idx = MIN2(scan_idx + 1, limit_idx); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2981 scan_idx = task_card_bm->get_next_one_offset(next_idx, limit_idx); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2982 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2983 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2984 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2985 // Update the marked bytes for this region. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2986 hr->add_to_marked_bytes(marked_bytes); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2987 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2988 // Next heap region |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2989 return false; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2990 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2991 }; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2992 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2993 class G1AggregateCountDataTask: public AbstractGangTask { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2994 protected: |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2995 G1CollectedHeap* _g1h; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2996 ConcurrentMark* _cm; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2997 BitMap* _cm_card_bm; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2998 size_t _max_task_num; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
2999 int _active_workers; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3000 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3001 public: |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3002 G1AggregateCountDataTask(G1CollectedHeap* g1h, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3003 ConcurrentMark* cm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3004 BitMap* cm_card_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3005 size_t max_task_num, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3006 int n_workers) : |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3007 AbstractGangTask("Count Aggregation"), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3008 _g1h(g1h), _cm(cm), _cm_card_bm(cm_card_bm), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3009 _max_task_num(max_task_num), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3010 _active_workers(n_workers) { } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3011 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3012 void work(uint worker_id) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3013 AggregateCountDataHRClosure cl(_cm, _cm_card_bm, _max_task_num); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3014 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3015 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3016 _g1h->heap_region_par_iterate_chunked(&cl, worker_id, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3017 _active_workers, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3018 HeapRegion::AggregateCountClaimValue); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3019 } else { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3020 _g1h->heap_region_iterate(&cl); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3021 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3022 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3023 }; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3024 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3025 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3026 void ConcurrentMark::aggregate_count_data() { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3027 int n_workers = (G1CollectedHeap::use_parallel_gc_threads() ? |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3028 _g1h->workers()->active_workers() : |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3029 1); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3030 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3031 G1AggregateCountDataTask g1_par_agg_task(_g1h, this, &_card_bm, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3032 _max_task_num, n_workers); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3033 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3034 if (G1CollectedHeap::use_parallel_gc_threads()) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3035 assert(_g1h->check_heap_region_claim_values(HeapRegion::InitialClaimValue), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3036 "sanity check"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3037 _g1h->set_par_threads(n_workers); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3038 _g1h->workers()->run_task(&g1_par_agg_task); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3039 _g1h->set_par_threads(0); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3040 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3041 assert(_g1h->check_heap_region_claim_values(HeapRegion::AggregateCountClaimValue), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3042 "sanity check"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3043 _g1h->reset_heap_region_claim_values(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3044 } else { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3045 g1_par_agg_task.work(0); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3046 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3047 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3048 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3049 // Clear the per-worker arrays used to store the per-region counting data |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3050 void ConcurrentMark::clear_all_count_data() { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3051 // Clear the global card bitmap - it will be filled during |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3052 // liveness count aggregation (during remark) and the |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3053 // final counting task. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3054 _card_bm.clear(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3055 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3056 // Clear the global region bitmap - it will be filled as part |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3057 // of the final counting task. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3058 _region_bm.clear(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3059 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3060 uint max_regions = _g1h->max_regions(); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3061 assert(_max_task_num != 0, "unitialized"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3062 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3063 for (int i = 0; (size_t) i < _max_task_num; i += 1) { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3064 BitMap* task_card_bm = count_card_bitmap_for(i); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3065 size_t* marked_bytes_array = count_marked_bytes_array_for(i); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3066 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3067 assert(task_card_bm->size() == _card_bm.size(), "size mismatch"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3068 assert(marked_bytes_array != NULL, "uninitialized"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3069 |
|
6010
720b6a76dd9d
7157073: G1: type change size_t -> uint for region counts / indexes
tonyp
parents:
6008
diff
changeset
|
3070 memset(marked_bytes_array, 0, (size_t) max_regions * sizeof(size_t)); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3071 task_card_bm->clear(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3072 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3073 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3074 |
| 342 | 3075 void ConcurrentMark::print_stats() { |
| 3076 if (verbose_stats()) { | |
| 3077 gclog_or_tty->print_cr("---------------------------------------------------------------------"); | |
| 3078 for (size_t i = 0; i < _active_tasks; ++i) { | |
| 3079 _tasks[i]->print_stats(); | |
| 3080 gclog_or_tty->print_cr("---------------------------------------------------------------------"); | |
| 3081 } | |
| 3082 } | |
| 3083 } | |
| 3084 | |
| 3085 // abandon current marking iteration due to a Full GC | |
| 3086 void ConcurrentMark::abort() { | |
| 3087 // Clear all marks to force marking thread to do nothing | |
| 3088 _nextMarkBitMap->clearAll(); | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3089 // Clear the liveness counting data |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3090 clear_all_count_data(); |
| 342 | 3091 // Empty mark stack |
| 3092 clear_marking_state(); | |
|
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3093 for (int i = 0; i < (int)_max_task_num; ++i) { |
| 342 | 3094 _tasks[i]->clear_region_fields(); |
|
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1833
diff
changeset
|
3095 } |
| 342 | 3096 _has_aborted = true; |
| 3097 | |
| 3098 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); | |
| 3099 satb_mq_set.abandon_partial_marking(); | |
|
1317
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
3100 // This can be called either during or outside marking, we'll read |
|
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
3101 // the expected_active value from the SATB queue set. |
|
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
3102 satb_mq_set.set_active_all_threads( |
|
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
3103 false, /* new active value */ |
|
d4197f8d516a
6935821: G1: threads created during marking do not active their SATB queues
tonyp
parents:
1314
diff
changeset
|
3104 satb_mq_set.is_active() /* expected_active */); |
| 342 | 3105 } |
| 3106 | |
| 3107 static void print_ms_time_info(const char* prefix, const char* name, | |
| 3108 NumberSeq& ns) { | |
| 3109 gclog_or_tty->print_cr("%s%5d %12s: total time = %8.2f s (avg = %8.2f ms).", | |
| 3110 prefix, ns.num(), name, ns.sum()/1000.0, ns.avg()); | |
| 3111 if (ns.num() > 0) { | |
| 3112 gclog_or_tty->print_cr("%s [std. dev = %8.2f ms, max = %8.2f ms]", | |
| 3113 prefix, ns.sd(), ns.maximum()); | |
| 3114 } | |
| 3115 } | |
| 3116 | |
| 3117 void ConcurrentMark::print_summary_info() { | |
| 3118 gclog_or_tty->print_cr(" Concurrent marking:"); | |
| 3119 print_ms_time_info(" ", "init marks", _init_times); | |
| 3120 print_ms_time_info(" ", "remarks", _remark_times); | |
| 3121 { | |
| 3122 print_ms_time_info(" ", "final marks", _remark_mark_times); | |
| 3123 print_ms_time_info(" ", "weak refs", _remark_weak_ref_times); | |
| 3124 | |
| 3125 } | |
| 3126 print_ms_time_info(" ", "cleanups", _cleanup_times); | |
| 3127 gclog_or_tty->print_cr(" Final counting total time = %8.2f s (avg = %8.2f ms).", | |
| 3128 _total_counting_time, | |
| 3129 (_cleanup_times.num() > 0 ? _total_counting_time * 1000.0 / | |
| 3130 (double)_cleanup_times.num() | |
| 3131 : 0.0)); | |
| 3132 if (G1ScrubRemSets) { | |
| 3133 gclog_or_tty->print_cr(" RS scrub total time = %8.2f s (avg = %8.2f ms).", | |
| 3134 _total_rs_scrub_time, | |
| 3135 (_cleanup_times.num() > 0 ? _total_rs_scrub_time * 1000.0 / | |
| 3136 (double)_cleanup_times.num() | |
| 3137 : 0.0)); | |
| 3138 } | |
| 3139 gclog_or_tty->print_cr(" Total stop_world time = %8.2f s.", | |
| 3140 (_init_times.sum() + _remark_times.sum() + | |
| 3141 _cleanup_times.sum())/1000.0); | |
| 3142 gclog_or_tty->print_cr(" Total concurrent time = %8.2f s " | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3143 "(%8.2f s marking).", |
| 342 | 3144 cmThread()->vtime_accum(), |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
3145 cmThread()->vtime_mark_accum()); |
| 342 | 3146 } |
| 3147 | |
| 1019 | 3148 void ConcurrentMark::print_worker_threads_on(outputStream* st) const { |
| 3149 _parallel_workers->print_worker_threads_on(st); | |
| 3150 } | |
| 3151 | |
| 342 | 3152 // We take a break if someone is trying to stop the world. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
3153 bool ConcurrentMark::do_yield_check(uint worker_id) { |
| 342 | 3154 if (should_yield()) { |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
3155 if (worker_id == 0) { |
| 342 | 3156 _g1h->g1_policy()->record_concurrent_pause(); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3157 } |
| 342 | 3158 cmThread()->yield(); |
| 3159 return true; | |
| 3160 } else { | |
| 3161 return false; | |
| 3162 } | |
| 3163 } | |
| 3164 | |
| 3165 bool ConcurrentMark::should_yield() { | |
| 3166 return cmThread()->should_yield(); | |
| 3167 } | |
| 3168 | |
| 3169 bool ConcurrentMark::containing_card_is_marked(void* p) { | |
| 3170 size_t offset = pointer_delta(p, _g1h->reserved_region().start(), 1); | |
| 3171 return _card_bm.at(offset >> CardTableModRefBS::card_shift); | |
| 3172 } | |
| 3173 | |
| 3174 bool ConcurrentMark::containing_cards_are_marked(void* start, | |
| 3175 void* last) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3176 return containing_card_is_marked(start) && |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3177 containing_card_is_marked(last); |
| 342 | 3178 } |
| 3179 | |
| 3180 #ifndef PRODUCT | |
| 3181 // for debugging purposes | |
| 3182 void ConcurrentMark::print_finger() { | |
| 3183 gclog_or_tty->print_cr("heap ["PTR_FORMAT", "PTR_FORMAT"), global finger = "PTR_FORMAT, | |
| 3184 _heap_start, _heap_end, _finger); | |
| 3185 for (int i = 0; i < (int) _max_task_num; ++i) { | |
| 3186 gclog_or_tty->print(" %d: "PTR_FORMAT, i, _tasks[i]->finger()); | |
| 3187 } | |
| 3188 gclog_or_tty->print_cr(""); | |
| 3189 } | |
| 3190 #endif | |
| 3191 | |
| 3771 | 3192 void CMTask::scan_object(oop obj) { |
| 3193 assert(_nextMarkBitMap->isMarked((HeapWord*) obj), "invariant"); | |
| 3194 | |
| 3195 if (_cm->verbose_high()) { | |
| 3196 gclog_or_tty->print_cr("[%d] we're scanning object "PTR_FORMAT, | |
| 3197 _task_id, (void*) obj); | |
| 3198 } | |
| 3199 | |
| 3200 size_t obj_size = obj->size(); | |
| 3201 _words_scanned += obj_size; | |
| 3202 | |
| 3203 obj->oop_iterate(_cm_oop_closure); | |
| 3204 statsOnly( ++_objs_scanned ); | |
| 3205 check_limits(); | |
| 3206 } | |
| 3207 | |
| 342 | 3208 // Closure for iteration over bitmaps |
| 3209 class CMBitMapClosure : public BitMapClosure { | |
| 3210 private: | |
| 3211 // the bitmap that is being iterated over | |
| 3212 CMBitMap* _nextMarkBitMap; | |
| 3213 ConcurrentMark* _cm; | |
| 3214 CMTask* _task; | |
| 3215 | |
| 3216 public: | |
|
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3217 CMBitMapClosure(CMTask *task, ConcurrentMark* cm, CMBitMap* nextMarkBitMap) : |
|
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3218 _task(task), _cm(cm), _nextMarkBitMap(nextMarkBitMap) { } |
| 342 | 3219 |
| 3220 bool do_bit(size_t offset) { | |
| 3221 HeapWord* addr = _nextMarkBitMap->offsetToHeapWord(offset); | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3222 assert(_nextMarkBitMap->isMarked(addr), "invariant"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3223 assert( addr < _cm->finger(), "invariant"); |
| 342 | 3224 |
|
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3225 statsOnly( _task->increase_objs_found_on_bitmap() ); |
|
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3226 assert(addr >= _task->finger(), "invariant"); |
|
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3227 |
|
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3228 // We move that task's local finger along. |
|
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3229 _task->move_finger_to(addr); |
| 342 | 3230 |
| 3231 _task->scan_object(oop(addr)); | |
| 3232 // we only partially drain the local queue and global stack | |
| 3233 _task->drain_local_queue(true); | |
| 3234 _task->drain_global_stack(true); | |
| 3235 | |
| 3236 // if the has_aborted flag has been raised, we need to bail out of | |
| 3237 // the iteration | |
| 3238 return !_task->has_aborted(); | |
| 3239 } | |
| 3240 }; | |
| 3241 | |
| 3242 // Closure for iterating over objects, currently only used for | |
| 3243 // processing SATB buffers. | |
| 3244 class CMObjectClosure : public ObjectClosure { | |
| 3245 private: | |
| 3246 CMTask* _task; | |
| 3247 | |
| 3248 public: | |
| 3249 void do_object(oop obj) { | |
| 3250 _task->deal_with_reference(obj); | |
| 3251 } | |
| 3252 | |
| 3253 CMObjectClosure(CMTask* task) : _task(task) { } | |
| 3254 }; | |
| 3255 | |
| 3771 | 3256 G1CMOopClosure::G1CMOopClosure(G1CollectedHeap* g1h, |
| 3257 ConcurrentMark* cm, | |
| 3258 CMTask* task) | |
| 3259 : _g1h(g1h), _cm(cm), _task(task) { | |
| 3260 assert(_ref_processor == NULL, "should be initialized to NULL"); | |
| 3261 | |
| 3262 if (G1UseConcMarkReferenceProcessing) { | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3977
diff
changeset
|
3263 _ref_processor = g1h->ref_processor_cm(); |
| 3771 | 3264 assert(_ref_processor != NULL, "should not be NULL"); |
| 342 | 3265 } |
| 3771 | 3266 } |
| 342 | 3267 |
| 3268 void CMTask::setup_for_region(HeapRegion* hr) { | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3269 // Separated the asserts so that we know which one fires. |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3270 assert(hr != NULL, |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3271 "claim_region() should have filtered out continues humongous regions"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3272 assert(!hr->continuesHumongous(), |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3273 "claim_region() should have filtered out continues humongous regions"); |
| 342 | 3274 |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3275 if (_cm->verbose_low()) { |
| 342 | 3276 gclog_or_tty->print_cr("[%d] setting up for region "PTR_FORMAT, |
| 3277 _task_id, hr); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3278 } |
| 342 | 3279 |
| 3280 _curr_region = hr; | |
| 3281 _finger = hr->bottom(); | |
| 3282 update_region_limit(); | |
| 3283 } | |
| 3284 | |
| 3285 void CMTask::update_region_limit() { | |
| 3286 HeapRegion* hr = _curr_region; | |
| 3287 HeapWord* bottom = hr->bottom(); | |
| 3288 HeapWord* limit = hr->next_top_at_mark_start(); | |
| 3289 | |
| 3290 if (limit == bottom) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3291 if (_cm->verbose_low()) { |
| 342 | 3292 gclog_or_tty->print_cr("[%d] found an empty region " |
| 3293 "["PTR_FORMAT", "PTR_FORMAT")", | |
| 3294 _task_id, bottom, limit); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3295 } |
| 342 | 3296 // The region was collected underneath our feet. |
| 3297 // We set the finger to bottom to ensure that the bitmap | |
| 3298 // iteration that will follow this will not do anything. | |
| 3299 // (this is not a condition that holds when we set the region up, | |
| 3300 // as the region is not supposed to be empty in the first place) | |
| 3301 _finger = bottom; | |
| 3302 } else if (limit >= _region_limit) { | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3303 assert(limit >= _finger, "peace of mind"); |
| 342 | 3304 } else { |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3305 assert(limit < _region_limit, "only way to get here"); |
| 342 | 3306 // This can happen under some pretty unusual circumstances. An |
| 3307 // evacuation pause empties the region underneath our feet (NTAMS | |
| 3308 // at bottom). We then do some allocation in the region (NTAMS | |
| 3309 // stays at bottom), followed by the region being used as a GC | |
| 3310 // alloc region (NTAMS will move to top() and the objects | |
| 3311 // originally below it will be grayed). All objects now marked in | |
| 3312 // the region are explicitly grayed, if below the global finger, | |
| 3313 // and we do not need in fact to scan anything else. So, we simply | |
| 3314 // set _finger to be limit to ensure that the bitmap iteration | |
| 3315 // doesn't do anything. | |
| 3316 _finger = limit; | |
| 3317 } | |
| 3318 | |
| 3319 _region_limit = limit; | |
| 3320 } | |
| 3321 | |
| 3322 void CMTask::giveup_current_region() { | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3323 assert(_curr_region != NULL, "invariant"); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3324 if (_cm->verbose_low()) { |
| 342 | 3325 gclog_or_tty->print_cr("[%d] giving up region "PTR_FORMAT, |
| 3326 _task_id, _curr_region); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3327 } |
| 342 | 3328 clear_region_fields(); |
| 3329 } | |
| 3330 | |
| 3331 void CMTask::clear_region_fields() { | |
| 3332 // Values for these three fields that indicate that we're not | |
| 3333 // holding on to a region. | |
| 3334 _curr_region = NULL; | |
| 3335 _finger = NULL; | |
| 3336 _region_limit = NULL; | |
| 3337 } | |
| 3338 | |
| 3771 | 3339 void CMTask::set_cm_oop_closure(G1CMOopClosure* cm_oop_closure) { |
| 3340 if (cm_oop_closure == NULL) { | |
| 3341 assert(_cm_oop_closure != NULL, "invariant"); | |
| 3342 } else { | |
| 3343 assert(_cm_oop_closure == NULL, "invariant"); | |
| 3344 } | |
| 3345 _cm_oop_closure = cm_oop_closure; | |
| 3346 } | |
| 3347 | |
| 342 | 3348 void CMTask::reset(CMBitMap* nextMarkBitMap) { |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3349 guarantee(nextMarkBitMap != NULL, "invariant"); |
| 342 | 3350 |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3351 if (_cm->verbose_low()) { |
| 342 | 3352 gclog_or_tty->print_cr("[%d] resetting", _task_id); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3353 } |
| 342 | 3354 |
| 3355 _nextMarkBitMap = nextMarkBitMap; | |
| 3356 clear_region_fields(); | |
| 3357 | |
| 3358 _calls = 0; | |
| 3359 _elapsed_time_ms = 0.0; | |
| 3360 _termination_time_ms = 0.0; | |
| 3361 _termination_start_time_ms = 0.0; | |
| 3362 | |
| 3363 #if _MARKING_STATS_ | |
| 3364 _local_pushes = 0; | |
| 3365 _local_pops = 0; | |
| 3366 _local_max_size = 0; | |
| 3367 _objs_scanned = 0; | |
| 3368 _global_pushes = 0; | |
| 3369 _global_pops = 0; | |
| 3370 _global_max_size = 0; | |
| 3371 _global_transfers_to = 0; | |
| 3372 _global_transfers_from = 0; | |
| 3373 _regions_claimed = 0; | |
| 3374 _objs_found_on_bitmap = 0; | |
| 3375 _satb_buffers_processed = 0; | |
| 3376 _steal_attempts = 0; | |
| 3377 _steals = 0; | |
| 3378 _aborted = 0; | |
| 3379 _aborted_overflow = 0; | |
| 3380 _aborted_cm_aborted = 0; | |
| 3381 _aborted_yield = 0; | |
| 3382 _aborted_timed_out = 0; | |
| 3383 _aborted_satb = 0; | |
| 3384 _aborted_termination = 0; | |
| 3385 #endif // _MARKING_STATS_ | |
| 3386 } | |
| 3387 | |
| 3388 bool CMTask::should_exit_termination() { | |
| 3389 regular_clock_call(); | |
| 3390 // This is called when we are in the termination protocol. We should | |
| 3391 // quit if, for some reason, this task wants to abort or the global | |
| 3392 // stack is not empty (this means that we can get work from it). | |
| 3393 return !_cm->mark_stack_empty() || has_aborted(); | |
| 3394 } | |
| 3395 | |
| 3396 void CMTask::reached_limit() { | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3397 assert(_words_scanned >= _words_scanned_limit || |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3398 _refs_reached >= _refs_reached_limit , |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3399 "shouldn't have been called otherwise"); |
| 342 | 3400 regular_clock_call(); |
| 3401 } | |
| 3402 | |
| 3403 void CMTask::regular_clock_call() { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3404 if (has_aborted()) return; |
| 342 | 3405 |
| 3406 // First, we need to recalculate the words scanned and refs reached | |
| 3407 // limits for the next clock call. | |
| 3408 recalculate_limits(); | |
| 3409 | |
| 3410 // During the regular clock call we do the following | |
| 3411 | |
| 3412 // (1) If an overflow has been flagged, then we abort. | |
| 3413 if (_cm->has_overflown()) { | |
| 3414 set_has_aborted(); | |
| 3415 return; | |
| 3416 } | |
| 3417 | |
| 3418 // If we are not concurrent (i.e. we're doing remark) we don't need | |
| 3419 // to check anything else. The other steps are only needed during | |
| 3420 // the concurrent marking phase. | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3421 if (!concurrent()) return; |
| 342 | 3422 |
| 3423 // (2) If marking has been aborted for Full GC, then we also abort. | |
| 3424 if (_cm->has_aborted()) { | |
| 3425 set_has_aborted(); | |
| 3426 statsOnly( ++_aborted_cm_aborted ); | |
| 3427 return; | |
| 3428 } | |
| 3429 | |
| 3430 double curr_time_ms = os::elapsedVTime() * 1000.0; | |
| 3431 | |
| 3432 // (3) If marking stats are enabled, then we update the step history. | |
| 3433 #if _MARKING_STATS_ | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3434 if (_words_scanned >= _words_scanned_limit) { |
| 342 | 3435 ++_clock_due_to_scanning; |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3436 } |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3437 if (_refs_reached >= _refs_reached_limit) { |
| 342 | 3438 ++_clock_due_to_marking; |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3439 } |
| 342 | 3440 |
| 3441 double last_interval_ms = curr_time_ms - _interval_start_time_ms; | |
| 3442 _interval_start_time_ms = curr_time_ms; | |
| 3443 _all_clock_intervals_ms.add(last_interval_ms); | |
| 3444 | |
| 3445 if (_cm->verbose_medium()) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3446 gclog_or_tty->print_cr("[%d] regular clock, interval = %1.2lfms, " |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3447 "scanned = %d%s, refs reached = %d%s", |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3448 _task_id, last_interval_ms, |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3449 _words_scanned, |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3450 (_words_scanned >= _words_scanned_limit) ? " (*)" : "", |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3451 _refs_reached, |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3452 (_refs_reached >= _refs_reached_limit) ? " (*)" : ""); |
| 342 | 3453 } |
| 3454 #endif // _MARKING_STATS_ | |
| 3455 | |
| 3456 // (4) We check whether we should yield. If we have to, then we abort. | |
| 3457 if (_cm->should_yield()) { | |
| 3458 // We should yield. To do this we abort the task. The caller is | |
| 3459 // responsible for yielding. | |
| 3460 set_has_aborted(); | |
| 3461 statsOnly( ++_aborted_yield ); | |
| 3462 return; | |
| 3463 } | |
| 3464 | |
| 3465 // (5) We check whether we've reached our time quota. If we have, | |
| 3466 // then we abort. | |
| 3467 double elapsed_time_ms = curr_time_ms - _start_time_ms; | |
| 3468 if (elapsed_time_ms > _time_target_ms) { | |
| 3469 set_has_aborted(); | |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
3470 _has_timed_out = true; |
| 342 | 3471 statsOnly( ++_aborted_timed_out ); |
| 3472 return; | |
| 3473 } | |
| 3474 | |
| 3475 // (6) Finally, we check whether there are enough completed STAB | |
| 3476 // buffers available for processing. If there are, we abort. | |
| 3477 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); | |
| 3478 if (!_draining_satb_buffers && satb_mq_set.process_completed_buffers()) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3479 if (_cm->verbose_low()) { |
| 342 | 3480 gclog_or_tty->print_cr("[%d] aborting to deal with pending SATB buffers", |
| 3481 _task_id); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3482 } |
| 342 | 3483 // we do need to process SATB buffers, we'll abort and restart |
| 3484 // the marking task to do so | |
| 3485 set_has_aborted(); | |
| 3486 statsOnly( ++_aborted_satb ); | |
| 3487 return; | |
| 3488 } | |
| 3489 } | |
| 3490 | |
| 3491 void CMTask::recalculate_limits() { | |
| 3492 _real_words_scanned_limit = _words_scanned + words_scanned_period; | |
| 3493 _words_scanned_limit = _real_words_scanned_limit; | |
| 3494 | |
| 3495 _real_refs_reached_limit = _refs_reached + refs_reached_period; | |
| 3496 _refs_reached_limit = _real_refs_reached_limit; | |
| 3497 } | |
| 3498 | |
| 3499 void CMTask::decrease_limits() { | |
| 3500 // This is called when we believe that we're going to do an infrequent | |
| 3501 // operation which will increase the per byte scanned cost (i.e. move | |
| 3502 // entries to/from the global stack). It basically tries to decrease the | |
| 3503 // scanning limit so that the clock is called earlier. | |
| 3504 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3505 if (_cm->verbose_medium()) { |
| 342 | 3506 gclog_or_tty->print_cr("[%d] decreasing limits", _task_id); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3507 } |
| 342 | 3508 |
| 3509 _words_scanned_limit = _real_words_scanned_limit - | |
| 3510 3 * words_scanned_period / 4; | |
| 3511 _refs_reached_limit = _real_refs_reached_limit - | |
| 3512 3 * refs_reached_period / 4; | |
| 3513 } | |
| 3514 | |
| 3515 void CMTask::move_entries_to_global_stack() { | |
| 3516 // local array where we'll store the entries that will be popped | |
| 3517 // from the local queue | |
| 3518 oop buffer[global_stack_transfer_size]; | |
| 3519 | |
| 3520 int n = 0; | |
| 3521 oop obj; | |
| 3522 while (n < global_stack_transfer_size && _task_queue->pop_local(obj)) { | |
| 3523 buffer[n] = obj; | |
| 3524 ++n; | |
| 3525 } | |
| 3526 | |
| 3527 if (n > 0) { | |
| 3528 // we popped at least one entry from the local queue | |
| 3529 | |
| 3530 statsOnly( ++_global_transfers_to; _local_pops += n ); | |
| 3531 | |
| 3532 if (!_cm->mark_stack_push(buffer, n)) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3533 if (_cm->verbose_low()) { |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3534 gclog_or_tty->print_cr("[%d] aborting due to global stack overflow", |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3535 _task_id); |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3536 } |
| 342 | 3537 set_has_aborted(); |
| 3538 } else { | |
| 3539 // the transfer was successful | |
| 3540 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3541 if (_cm->verbose_medium()) { |
| 342 | 3542 gclog_or_tty->print_cr("[%d] pushed %d entries to the global stack", |
| 3543 _task_id, n); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3544 } |
| 342 | 3545 statsOnly( int tmp_size = _cm->mark_stack_size(); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3546 if (tmp_size > _global_max_size) { |
| 342 | 3547 _global_max_size = tmp_size; |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3548 } |
| 342 | 3549 _global_pushes += n ); |
| 3550 } | |
| 3551 } | |
| 3552 | |
| 3553 // this operation was quite expensive, so decrease the limits | |
| 3554 decrease_limits(); | |
| 3555 } | |
| 3556 | |
| 3557 void CMTask::get_entries_from_global_stack() { | |
| 3558 // local array where we'll store the entries that will be popped | |
| 3559 // from the global stack. | |
| 3560 oop buffer[global_stack_transfer_size]; | |
| 3561 int n; | |
| 3562 _cm->mark_stack_pop(buffer, global_stack_transfer_size, &n); | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3563 assert(n <= global_stack_transfer_size, |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3564 "we should not pop more than the given limit"); |
| 342 | 3565 if (n > 0) { |
| 3566 // yes, we did actually pop at least one entry | |
| 3567 | |
| 3568 statsOnly( ++_global_transfers_from; _global_pops += n ); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3569 if (_cm->verbose_medium()) { |
| 342 | 3570 gclog_or_tty->print_cr("[%d] popped %d entries from the global stack", |
| 3571 _task_id, n); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3572 } |
| 342 | 3573 for (int i = 0; i < n; ++i) { |
| 3574 bool success = _task_queue->push(buffer[i]); | |
| 3575 // We only call this when the local queue is empty or under a | |
| 3576 // given target limit. So, we do not expect this push to fail. | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3577 assert(success, "invariant"); |
| 342 | 3578 } |
| 3579 | |
| 3580 statsOnly( int tmp_size = _task_queue->size(); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3581 if (tmp_size > _local_max_size) { |
| 342 | 3582 _local_max_size = tmp_size; |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3583 } |
| 342 | 3584 _local_pushes += n ); |
| 3585 } | |
| 3586 | |
| 3587 // this operation was quite expensive, so decrease the limits | |
| 3588 decrease_limits(); | |
| 3589 } | |
| 3590 | |
| 3591 void CMTask::drain_local_queue(bool partially) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3592 if (has_aborted()) return; |
| 342 | 3593 |
| 3594 // Decide what the target size is, depending whether we're going to | |
| 3595 // drain it partially (so that other tasks can steal if they run out | |
| 3596 // of things to do) or totally (at the very end). | |
| 3597 size_t target_size; | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3598 if (partially) { |
| 342 | 3599 target_size = MIN2((size_t)_task_queue->max_elems()/3, GCDrainStackTargetSize); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3600 } else { |
| 342 | 3601 target_size = 0; |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3602 } |
| 342 | 3603 |
| 3604 if (_task_queue->size() > target_size) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3605 if (_cm->verbose_high()) { |
| 342 | 3606 gclog_or_tty->print_cr("[%d] draining local queue, target size = %d", |
| 3607 _task_id, target_size); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3608 } |
| 342 | 3609 |
| 3610 oop obj; | |
| 3611 bool ret = _task_queue->pop_local(obj); | |
| 3612 while (ret) { | |
| 3613 statsOnly( ++_local_pops ); | |
| 3614 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3615 if (_cm->verbose_high()) { |
| 342 | 3616 gclog_or_tty->print_cr("[%d] popped "PTR_FORMAT, _task_id, |
| 3617 (void*) obj); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3618 } |
| 342 | 3619 |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3620 assert(_g1h->is_in_g1_reserved((HeapWord*) obj), "invariant" ); |
| 2361 | 3621 assert(!_g1h->is_on_master_free_list( |
| 2152 | 3622 _g1h->heap_region_containing((HeapWord*) obj)), "invariant"); |
| 342 | 3623 |
| 3624 scan_object(obj); | |
| 3625 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3626 if (_task_queue->size() <= target_size || has_aborted()) { |
| 342 | 3627 ret = false; |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3628 } else { |
| 342 | 3629 ret = _task_queue->pop_local(obj); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3630 } |
| 342 | 3631 } |
| 3632 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3633 if (_cm->verbose_high()) { |
| 342 | 3634 gclog_or_tty->print_cr("[%d] drained local queue, size = %d", |
| 3635 _task_id, _task_queue->size()); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3636 } |
| 342 | 3637 } |
| 3638 } | |
| 3639 | |
| 3640 void CMTask::drain_global_stack(bool partially) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3641 if (has_aborted()) return; |
| 342 | 3642 |
| 3643 // We have a policy to drain the local queue before we attempt to | |
| 3644 // drain the global stack. | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3645 assert(partially || _task_queue->size() == 0, "invariant"); |
| 342 | 3646 |
| 3647 // Decide what the target size is, depending whether we're going to | |
| 3648 // drain it partially (so that other tasks can steal if they run out | |
| 3649 // of things to do) or totally (at the very end). Notice that, | |
| 3650 // because we move entries from the global stack in chunks or | |
| 3651 // because another task might be doing the same, we might in fact | |
| 3652 // drop below the target. But, this is not a problem. | |
| 3653 size_t target_size; | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3654 if (partially) { |
| 342 | 3655 target_size = _cm->partial_mark_stack_size_target(); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3656 } else { |
| 342 | 3657 target_size = 0; |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3658 } |
| 342 | 3659 |
| 3660 if (_cm->mark_stack_size() > target_size) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3661 if (_cm->verbose_low()) { |
| 342 | 3662 gclog_or_tty->print_cr("[%d] draining global_stack, target size %d", |
| 3663 _task_id, target_size); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3664 } |
| 342 | 3665 |
| 3666 while (!has_aborted() && _cm->mark_stack_size() > target_size) { | |
| 3667 get_entries_from_global_stack(); | |
| 3668 drain_local_queue(partially); | |
| 3669 } | |
| 3670 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3671 if (_cm->verbose_low()) { |
| 342 | 3672 gclog_or_tty->print_cr("[%d] drained global stack, size = %d", |
| 3673 _task_id, _cm->mark_stack_size()); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3674 } |
| 342 | 3675 } |
| 3676 } | |
| 3677 | |
| 3678 // SATB Queue has several assumptions on whether to call the par or | |
| 3679 // non-par versions of the methods. this is why some of the code is | |
| 3680 // replicated. We should really get rid of the single-threaded version | |
| 3681 // of the code to simplify things. | |
| 3682 void CMTask::drain_satb_buffers() { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3683 if (has_aborted()) return; |
| 342 | 3684 |
| 3685 // We set this so that the regular clock knows that we're in the | |
| 3686 // middle of draining buffers and doesn't set the abort flag when it | |
| 3687 // notices that SATB buffers are available for draining. It'd be | |
| 3688 // very counter productive if it did that. :-) | |
| 3689 _draining_satb_buffers = true; | |
| 3690 | |
| 3691 CMObjectClosure oc(this); | |
| 3692 SATBMarkQueueSet& satb_mq_set = JavaThread::satb_mark_queue_set(); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3693 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3694 satb_mq_set.set_par_closure(_task_id, &oc); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3695 } else { |
| 342 | 3696 satb_mq_set.set_closure(&oc); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3697 } |
| 342 | 3698 |
| 3699 // This keeps claiming and applying the closure to completed buffers | |
| 3700 // until we run out of buffers or we need to abort. | |
|
1833
8b10f48633dc
6984287: Regularize how GC parallel workers are specified.
jmasa
parents:
1719
diff
changeset
|
3701 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3702 while (!has_aborted() && |
| 3703 satb_mq_set.par_apply_closure_to_completed_buffer(_task_id)) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3704 if (_cm->verbose_medium()) { |
| 342 | 3705 gclog_or_tty->print_cr("[%d] processed an SATB buffer", _task_id); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3706 } |
| 342 | 3707 statsOnly( ++_satb_buffers_processed ); |
| 3708 regular_clock_call(); | |
| 3709 } | |
| 3710 } else { | |
| 3711 while (!has_aborted() && | |
| 3712 satb_mq_set.apply_closure_to_completed_buffer()) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3713 if (_cm->verbose_medium()) { |
| 342 | 3714 gclog_or_tty->print_cr("[%d] processed an SATB buffer", _task_id); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3715 } |
| 342 | 3716 statsOnly( ++_satb_buffers_processed ); |
| 3717 regular_clock_call(); | |
| 3718 } | |
| 3719 } | |
| 3720 | |
| 3721 if (!concurrent() && !has_aborted()) { | |
| 3722 // We should only do this during remark. | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3723 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3724 satb_mq_set.par_iterate_closure_all_threads(_task_id); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3725 } else { |
| 342 | 3726 satb_mq_set.iterate_closure_all_threads(); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3727 } |
| 342 | 3728 } |
| 3729 | |
| 3730 _draining_satb_buffers = false; | |
| 3731 | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3732 assert(has_aborted() || |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3733 concurrent() || |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3734 satb_mq_set.completed_buffers_num() == 0, "invariant"); |
| 342 | 3735 |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3736 if (G1CollectedHeap::use_parallel_gc_threads()) { |
| 342 | 3737 satb_mq_set.set_par_closure(_task_id, NULL); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3738 } else { |
| 342 | 3739 satb_mq_set.set_closure(NULL); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3740 } |
| 342 | 3741 |
| 3742 // again, this was a potentially expensive operation, decrease the | |
| 3743 // limits to get the regular clock call early | |
| 3744 decrease_limits(); | |
| 3745 } | |
| 3746 | |
| 3747 void CMTask::print_stats() { | |
| 3748 gclog_or_tty->print_cr("Marking Stats, task = %d, calls = %d", | |
| 3749 _task_id, _calls); | |
| 3750 gclog_or_tty->print_cr(" Elapsed time = %1.2lfms, Termination time = %1.2lfms", | |
| 3751 _elapsed_time_ms, _termination_time_ms); | |
| 3752 gclog_or_tty->print_cr(" Step Times (cum): num = %d, avg = %1.2lfms, sd = %1.2lfms", | |
| 3753 _step_times_ms.num(), _step_times_ms.avg(), | |
| 3754 _step_times_ms.sd()); | |
| 3755 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms", | |
| 3756 _step_times_ms.maximum(), _step_times_ms.sum()); | |
| 3757 | |
| 3758 #if _MARKING_STATS_ | |
| 3759 gclog_or_tty->print_cr(" Clock Intervals (cum): num = %d, avg = %1.2lfms, sd = %1.2lfms", | |
| 3760 _all_clock_intervals_ms.num(), _all_clock_intervals_ms.avg(), | |
| 3761 _all_clock_intervals_ms.sd()); | |
| 3762 gclog_or_tty->print_cr(" max = %1.2lfms, total = %1.2lfms", | |
| 3763 _all_clock_intervals_ms.maximum(), | |
| 3764 _all_clock_intervals_ms.sum()); | |
| 3765 gclog_or_tty->print_cr(" Clock Causes (cum): scanning = %d, marking = %d", | |
| 3766 _clock_due_to_scanning, _clock_due_to_marking); | |
| 3767 gclog_or_tty->print_cr(" Objects: scanned = %d, found on the bitmap = %d", | |
| 3768 _objs_scanned, _objs_found_on_bitmap); | |
| 3769 gclog_or_tty->print_cr(" Local Queue: pushes = %d, pops = %d, max size = %d", | |
| 3770 _local_pushes, _local_pops, _local_max_size); | |
| 3771 gclog_or_tty->print_cr(" Global Stack: pushes = %d, pops = %d, max size = %d", | |
| 3772 _global_pushes, _global_pops, _global_max_size); | |
| 3773 gclog_or_tty->print_cr(" transfers to = %d, transfers from = %d", | |
| 3774 _global_transfers_to,_global_transfers_from); | |
|
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3775 gclog_or_tty->print_cr(" Regions: claimed = %d", _regions_claimed); |
| 342 | 3776 gclog_or_tty->print_cr(" SATB buffers: processed = %d", _satb_buffers_processed); |
| 3777 gclog_or_tty->print_cr(" Steals: attempts = %d, successes = %d", | |
| 3778 _steal_attempts, _steals); | |
| 3779 gclog_or_tty->print_cr(" Aborted: %d, due to", _aborted); | |
| 3780 gclog_or_tty->print_cr(" overflow: %d, global abort: %d, yield: %d", | |
| 3781 _aborted_overflow, _aborted_cm_aborted, _aborted_yield); | |
| 3782 gclog_or_tty->print_cr(" time out: %d, SATB: %d, termination: %d", | |
| 3783 _aborted_timed_out, _aborted_satb, _aborted_termination); | |
| 3784 #endif // _MARKING_STATS_ | |
| 3785 } | |
| 3786 | |
| 3787 /***************************************************************************** | |
| 3788 | |
| 3789 The do_marking_step(time_target_ms) method is the building block | |
| 3790 of the parallel marking framework. It can be called in parallel | |
| 3791 with other invocations of do_marking_step() on different tasks | |
| 3792 (but only one per task, obviously) and concurrently with the | |
| 3793 mutator threads, or during remark, hence it eliminates the need | |
| 3794 for two versions of the code. When called during remark, it will | |
| 3795 pick up from where the task left off during the concurrent marking | |
| 3796 phase. Interestingly, tasks are also claimable during evacuation | |
| 3797 pauses too, since do_marking_step() ensures that it aborts before | |
| 3798 it needs to yield. | |
| 3799 | |
| 3800 The data structures that is uses to do marking work are the | |
| 3801 following: | |
| 3802 | |
| 3803 (1) Marking Bitmap. If there are gray objects that appear only | |
| 3804 on the bitmap (this happens either when dealing with an overflow | |
| 3805 or when the initial marking phase has simply marked the roots | |
| 3806 and didn't push them on the stack), then tasks claim heap | |
| 3807 regions whose bitmap they then scan to find gray objects. A | |
| 3808 global finger indicates where the end of the last claimed region | |
| 3809 is. A local finger indicates how far into the region a task has | |
| 3810 scanned. The two fingers are used to determine how to gray an | |
| 3811 object (i.e. whether simply marking it is OK, as it will be | |
| 3812 visited by a task in the future, or whether it needs to be also | |
| 3813 pushed on a stack). | |
| 3814 | |
| 3815 (2) Local Queue. The local queue of the task which is accessed | |
| 3816 reasonably efficiently by the task. Other tasks can steal from | |
| 3817 it when they run out of work. Throughout the marking phase, a | |
| 3818 task attempts to keep its local queue short but not totally | |
| 3819 empty, so that entries are available for stealing by other | |
| 3820 tasks. Only when there is no more work, a task will totally | |
| 3821 drain its local queue. | |
| 3822 | |
| 3823 (3) Global Mark Stack. This handles local queue overflow. During | |
| 3824 marking only sets of entries are moved between it and the local | |
| 3825 queues, as access to it requires a mutex and more fine-grain | |
| 3826 interaction with it which might cause contention. If it | |
| 3827 overflows, then the marking phase should restart and iterate | |
| 3828 over the bitmap to identify gray objects. Throughout the marking | |
| 3829 phase, tasks attempt to keep the global mark stack at a small | |
| 3830 length but not totally empty, so that entries are available for | |
| 3831 popping by other tasks. Only when there is no more work, tasks | |
| 3832 will totally drain the global mark stack. | |
| 3833 | |
|
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3834 (4) SATB Buffer Queue. This is where completed SATB buffers are |
| 342 | 3835 made available. Buffers are regularly removed from this queue |
| 3836 and scanned for roots, so that the queue doesn't get too | |
| 3837 long. During remark, all completed buffers are processed, as | |
| 3838 well as the filled in parts of any uncompleted buffers. | |
| 3839 | |
| 3840 The do_marking_step() method tries to abort when the time target | |
| 3841 has been reached. There are a few other cases when the | |
| 3842 do_marking_step() method also aborts: | |
| 3843 | |
| 3844 (1) When the marking phase has been aborted (after a Full GC). | |
| 3845 | |
|
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3846 (2) When a global overflow (on the global stack) has been |
|
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3847 triggered. Before the task aborts, it will actually sync up with |
|
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3848 the other tasks to ensure that all the marking data structures |
|
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3849 (local queues, stacks, fingers etc.) are re-initialised so that |
|
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3850 when do_marking_step() completes, the marking phase can |
|
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3851 immediately restart. |
| 342 | 3852 |
| 3853 (3) When enough completed SATB buffers are available. The | |
| 3854 do_marking_step() method only tries to drain SATB buffers right | |
| 3855 at the beginning. So, if enough buffers are available, the | |
| 3856 marking step aborts and the SATB buffers are processed at | |
| 3857 the beginning of the next invocation. | |
| 3858 | |
| 3859 (4) To yield. when we have to yield then we abort and yield | |
| 3860 right at the end of do_marking_step(). This saves us from a lot | |
| 3861 of hassle as, by yielding we might allow a Full GC. If this | |
| 3862 happens then objects will be compacted underneath our feet, the | |
| 3863 heap might shrink, etc. We save checking for this by just | |
| 3864 aborting and doing the yield right at the end. | |
| 3865 | |
| 3866 From the above it follows that the do_marking_step() method should | |
| 3867 be called in a loop (or, otherwise, regularly) until it completes. | |
| 3868 | |
| 3869 If a marking step completes without its has_aborted() flag being | |
| 3870 true, it means it has completed the current marking phase (and | |
| 3871 also all other marking tasks have done so and have all synced up). | |
| 3872 | |
| 3873 A method called regular_clock_call() is invoked "regularly" (in | |
| 3874 sub ms intervals) throughout marking. It is this clock method that | |
| 3875 checks all the abort conditions which were mentioned above and | |
| 3876 decides when the task should abort. A work-based scheme is used to | |
| 3877 trigger this clock method: when the number of object words the | |
| 3878 marking phase has scanned or the number of references the marking | |
| 3879 phase has visited reach a given limit. Additional invocations to | |
| 3880 the method clock have been planted in a few other strategic places | |
| 3881 too. The initial reason for the clock method was to avoid calling | |
| 3882 vtime too regularly, as it is quite expensive. So, once it was in | |
| 3883 place, it was natural to piggy-back all the other conditions on it | |
| 3884 too and not constantly check them throughout the code. | |
| 3885 | |
| 3886 *****************************************************************************/ | |
| 3887 | |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
3888 void CMTask::do_marking_step(double time_target_ms, |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
3889 bool do_stealing, |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
3890 bool do_termination) { |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3891 assert(time_target_ms >= 1.0, "minimum granularity is 1ms"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3892 assert(concurrent() == _cm->concurrent(), "they should be the same"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3893 |
| 342 | 3894 G1CollectorPolicy* g1_policy = _g1h->g1_policy(); |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3895 assert(_task_queues != NULL, "invariant"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3896 assert(_task_queue != NULL, "invariant"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3897 assert(_task_queues->queue(_task_id) == _task_queue, "invariant"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3898 |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3899 assert(!_claimed, |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3900 "only one thread should claim this task at any one time"); |
| 342 | 3901 |
| 3902 // OK, this doesn't safeguard again all possible scenarios, as it is | |
| 3903 // possible for two threads to set the _claimed flag at the same | |
| 3904 // time. But it is only for debugging purposes anyway and it will | |
| 3905 // catch most problems. | |
| 3906 _claimed = true; | |
| 3907 | |
| 3908 _start_time_ms = os::elapsedVTime() * 1000.0; | |
| 3909 statsOnly( _interval_start_time_ms = _start_time_ms ); | |
| 3910 | |
| 3911 double diff_prediction_ms = | |
| 3912 g1_policy->get_new_prediction(&_marking_step_diffs_ms); | |
| 3913 _time_target_ms = time_target_ms - diff_prediction_ms; | |
| 3914 | |
| 3915 // set up the variables that are used in the work-based scheme to | |
| 3916 // call the regular clock method | |
| 3917 _words_scanned = 0; | |
| 3918 _refs_reached = 0; | |
| 3919 recalculate_limits(); | |
| 3920 | |
| 3921 // clear all flags | |
| 3922 clear_has_aborted(); | |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
3923 _has_timed_out = false; |
| 342 | 3924 _draining_satb_buffers = false; |
| 3925 | |
| 3926 ++_calls; | |
| 3927 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3928 if (_cm->verbose_low()) { |
| 342 | 3929 gclog_or_tty->print_cr("[%d] >>>>>>>>>> START, call = %d, " |
| 3930 "target = %1.2lfms >>>>>>>>>>", | |
| 3931 _task_id, _calls, _time_target_ms); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3932 } |
| 342 | 3933 |
| 3934 // Set up the bitmap and oop closures. Anything that uses them is | |
| 3935 // eventually called from this method, so it is OK to allocate these | |
| 3936 // statically. | |
| 3937 CMBitMapClosure bitmap_closure(this, _cm, _nextMarkBitMap); | |
| 3771 | 3938 G1CMOopClosure cm_oop_closure(_g1h, _cm, this); |
| 3939 set_cm_oop_closure(&cm_oop_closure); | |
| 342 | 3940 |
| 3941 if (_cm->has_overflown()) { | |
|
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3942 // This can happen if the mark stack overflows during a GC pause |
|
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3943 // and this task, after a yield point, restarts. We have to abort |
|
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3944 // as we need to get into the overflow protocol which happens |
|
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3945 // right at the end of this task. |
| 342 | 3946 set_has_aborted(); |
| 3947 } | |
| 3948 | |
| 3949 // First drain any available SATB buffers. After this, we will not | |
| 3950 // look at SATB buffers before the next invocation of this method. | |
| 3951 // If enough completed SATB buffers are queued up, the regular clock | |
| 3952 // will abort this task so that it restarts. | |
| 3953 drain_satb_buffers(); | |
| 3954 // ...then partially drain the local queue and the global stack | |
| 3955 drain_local_queue(true); | |
| 3956 drain_global_stack(true); | |
| 3957 | |
| 3958 do { | |
| 3959 if (!has_aborted() && _curr_region != NULL) { | |
| 3960 // This means that we're already holding on to a region. | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3961 assert(_finger != NULL, "if region is not NULL, then the finger " |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3962 "should not be NULL either"); |
| 342 | 3963 |
| 3964 // We might have restarted this task after an evacuation pause | |
| 3965 // which might have evacuated the region we're holding on to | |
| 3966 // underneath our feet. Let's read its limit again to make sure | |
| 3967 // that we do not iterate over a region of the heap that | |
| 3968 // contains garbage (update_region_limit() will also move | |
| 3969 // _finger to the start of the region if it is found empty). | |
| 3970 update_region_limit(); | |
| 3971 // We will start from _finger not from the start of the region, | |
| 3972 // as we might be restarting this task after aborting half-way | |
| 3973 // through scanning this region. In this case, _finger points to | |
| 3974 // the address where we last found a marked object. If this is a | |
| 3975 // fresh region, _finger points to start(). | |
| 3976 MemRegion mr = MemRegion(_finger, _region_limit); | |
| 3977 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3978 if (_cm->verbose_low()) { |
| 342 | 3979 gclog_or_tty->print_cr("[%d] we're scanning part " |
| 3980 "["PTR_FORMAT", "PTR_FORMAT") " | |
| 3981 "of region "PTR_FORMAT, | |
| 3982 _task_id, _finger, _region_limit, _curr_region); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
3983 } |
| 342 | 3984 |
| 3985 // Let's iterate over the bitmap of the part of the | |
| 3986 // region that is left. | |
|
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
3987 if (mr.is_empty() || _nextMarkBitMap->iterate(&bitmap_closure, mr)) { |
| 342 | 3988 // We successfully completed iterating over the region. Now, |
| 3989 // let's give up the region. | |
| 3990 giveup_current_region(); | |
| 3991 regular_clock_call(); | |
| 3992 } else { | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3993 assert(has_aborted(), "currently the only way to do so"); |
| 342 | 3994 // The only way to abort the bitmap iteration is to return |
| 3995 // false from the do_bit() method. However, inside the | |
| 3996 // do_bit() method we move the _finger to point to the | |
| 3997 // object currently being looked at. So, if we bail out, we | |
| 3998 // have definitely set _finger to something non-null. | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
3999 assert(_finger != NULL, "invariant"); |
| 342 | 4000 |
| 4001 // Region iteration was actually aborted. So now _finger | |
| 4002 // points to the address of the object we last scanned. If we | |
| 4003 // leave it there, when we restart this task, we will rescan | |
| 4004 // the object. It is easy to avoid this. We move the finger by | |
| 4005 // enough to point to the next possible object header (the | |
| 4006 // bitmap knows by how much we need to move it as it knows its | |
| 4007 // granularity). | |
|
1314
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4008 assert(_finger < _region_limit, "invariant"); |
|
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4009 HeapWord* new_finger = _nextMarkBitMap->nextWord(_finger); |
|
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4010 // Check if bitmap iteration was aborted while scanning the last object |
|
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4011 if (new_finger >= _region_limit) { |
|
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
4012 giveup_current_region(); |
|
1314
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4013 } else { |
|
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
4014 move_finger_to(new_finger); |
|
1314
3f0549ed0c98
6921710: G1: assert(new_finger >= _finger && new_finger < _region_limit,"invariant")
apetrusenko
parents:
1284
diff
changeset
|
4015 } |
| 342 | 4016 } |
| 4017 } | |
| 4018 // At this point we have either completed iterating over the | |
| 4019 // region we were holding on to, or we have aborted. | |
| 4020 | |
| 4021 // We then partially drain the local queue and the global stack. | |
| 4022 // (Do we really need this?) | |
| 4023 drain_local_queue(true); | |
| 4024 drain_global_stack(true); | |
| 4025 | |
| 4026 // Read the note on the claim_region() method on why it might | |
| 4027 // return NULL with potentially more regions available for | |
| 4028 // claiming and why we have to check out_of_regions() to determine | |
| 4029 // whether we're done or not. | |
| 4030 while (!has_aborted() && _curr_region == NULL && !_cm->out_of_regions()) { | |
| 4031 // We are going to try to claim a new region. We should have | |
| 4032 // given up on the previous one. | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4033 // Separated the asserts so that we know which one fires. |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4034 assert(_curr_region == NULL, "invariant"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4035 assert(_finger == NULL, "invariant"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4036 assert(_region_limit == NULL, "invariant"); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4037 if (_cm->verbose_low()) { |
| 342 | 4038 gclog_or_tty->print_cr("[%d] trying to claim a new region", _task_id); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4039 } |
| 342 | 4040 HeapRegion* claimed_region = _cm->claim_region(_task_id); |
| 4041 if (claimed_region != NULL) { | |
| 4042 // Yes, we managed to claim one | |
| 4043 statsOnly( ++_regions_claimed ); | |
| 4044 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4045 if (_cm->verbose_low()) { |
| 342 | 4046 gclog_or_tty->print_cr("[%d] we successfully claimed " |
| 4047 "region "PTR_FORMAT, | |
| 4048 _task_id, claimed_region); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4049 } |
| 342 | 4050 |
| 4051 setup_for_region(claimed_region); | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4052 assert(_curr_region == claimed_region, "invariant"); |
| 342 | 4053 } |
| 4054 // It is important to call the regular clock here. It might take | |
| 4055 // a while to claim a region if, for example, we hit a large | |
| 4056 // block of empty regions. So we need to call the regular clock | |
| 4057 // method once round the loop to make sure it's called | |
| 4058 // frequently enough. | |
| 4059 regular_clock_call(); | |
| 4060 } | |
| 4061 | |
| 4062 if (!has_aborted() && _curr_region == NULL) { | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4063 assert(_cm->out_of_regions(), |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4064 "at this point we should be out of regions"); |
| 342 | 4065 } |
| 4066 } while ( _curr_region != NULL && !has_aborted()); | |
| 4067 | |
| 4068 if (!has_aborted()) { | |
| 4069 // We cannot check whether the global stack is empty, since other | |
|
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
4070 // tasks might be pushing objects to it concurrently. |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4071 assert(_cm->out_of_regions(), |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4072 "at this point we should be out of regions"); |
| 342 | 4073 |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4074 if (_cm->verbose_low()) { |
| 342 | 4075 gclog_or_tty->print_cr("[%d] all regions claimed", _task_id); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4076 } |
| 342 | 4077 |
| 4078 // Try to reduce the number of available SATB buffers so that | |
| 4079 // remark has less work to do. | |
| 4080 drain_satb_buffers(); | |
| 4081 } | |
| 4082 | |
| 4083 // Since we've done everything else, we can now totally drain the | |
| 4084 // local queue and global stack. | |
| 4085 drain_local_queue(false); | |
| 4086 drain_global_stack(false); | |
| 4087 | |
| 4088 // Attempt at work stealing from other task's queues. | |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
4089 if (do_stealing && !has_aborted()) { |
| 342 | 4090 // We have not aborted. This means that we have finished all that |
| 4091 // we could. Let's try to do some stealing... | |
| 4092 | |
| 4093 // We cannot check whether the global stack is empty, since other | |
|
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
4094 // tasks might be pushing objects to it concurrently. |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4095 assert(_cm->out_of_regions() && _task_queue->size() == 0, |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4096 "only way to reach here"); |
| 342 | 4097 |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4098 if (_cm->verbose_low()) { |
| 342 | 4099 gclog_or_tty->print_cr("[%d] starting to steal", _task_id); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4100 } |
| 342 | 4101 |
| 4102 while (!has_aborted()) { | |
| 4103 oop obj; | |
| 4104 statsOnly( ++_steal_attempts ); | |
| 4105 | |
| 4106 if (_cm->try_stealing(_task_id, &_hash_seed, obj)) { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4107 if (_cm->verbose_medium()) { |
| 342 | 4108 gclog_or_tty->print_cr("[%d] stolen "PTR_FORMAT" successfully", |
| 4109 _task_id, (void*) obj); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4110 } |
| 342 | 4111 |
| 4112 statsOnly( ++_steals ); | |
| 4113 | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4114 assert(_nextMarkBitMap->isMarked((HeapWord*) obj), |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4115 "any stolen object should be marked"); |
| 342 | 4116 scan_object(obj); |
| 4117 | |
| 4118 // And since we're towards the end, let's totally drain the | |
| 4119 // local queue and global stack. | |
| 4120 drain_local_queue(false); | |
| 4121 drain_global_stack(false); | |
| 4122 } else { | |
| 4123 break; | |
| 4124 } | |
| 4125 } | |
| 4126 } | |
| 4127 | |
|
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4128 // If we are about to wrap up and go into termination, check if we |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4129 // should raise the overflow flag. |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4130 if (do_termination && !has_aborted()) { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4131 if (_cm->force_overflow()->should_force()) { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4132 _cm->set_has_overflown(); |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4133 regular_clock_call(); |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4134 } |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4135 } |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2436
diff
changeset
|
4136 |
| 342 | 4137 // We still haven't aborted. Now, let's try to get into the |
| 4138 // termination protocol. | |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
4139 if (do_termination && !has_aborted()) { |
| 342 | 4140 // We cannot check whether the global stack is empty, since other |
|
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
4141 // tasks might be concurrently pushing objects on it. |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4142 // Separated the asserts so that we know which one fires. |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4143 assert(_cm->out_of_regions(), "only way to reach here"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4144 assert(_task_queue->size() == 0, "only way to reach here"); |
| 342 | 4145 |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4146 if (_cm->verbose_low()) { |
| 342 | 4147 gclog_or_tty->print_cr("[%d] starting termination protocol", _task_id); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4148 } |
| 342 | 4149 |
| 4150 _termination_start_time_ms = os::elapsedVTime() * 1000.0; | |
| 4151 // The CMTask class also extends the TerminatorTerminator class, | |
| 4152 // hence its should_exit_termination() method will also decide | |
| 4153 // whether to exit the termination protocol or not. | |
| 4154 bool finished = _cm->terminator()->offer_termination(this); | |
| 4155 double termination_end_time_ms = os::elapsedVTime() * 1000.0; | |
| 4156 _termination_time_ms += | |
| 4157 termination_end_time_ms - _termination_start_time_ms; | |
| 4158 | |
| 4159 if (finished) { | |
| 4160 // We're all done. | |
| 4161 | |
| 4162 if (_task_id == 0) { | |
| 4163 // let's allow task 0 to do this | |
| 4164 if (concurrent()) { | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4165 assert(_cm->concurrent_marking_in_progress(), "invariant"); |
| 342 | 4166 // we need to set this to false before the next |
| 4167 // safepoint. This way we ensure that the marking phase | |
| 4168 // doesn't observe any more heap expansions. | |
| 4169 _cm->clear_concurrent_marking_in_progress(); | |
| 4170 } | |
| 4171 } | |
| 4172 | |
| 4173 // We can now guarantee that the global stack is empty, since | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4174 // all other tasks have finished. We separated the guarantees so |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4175 // that, if a condition is false, we can immediately find out |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4176 // which one. |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4177 guarantee(_cm->out_of_regions(), "only way to reach here"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4178 guarantee(_cm->mark_stack_empty(), "only way to reach here"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4179 guarantee(_task_queue->size() == 0, "only way to reach here"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4180 guarantee(!_cm->has_overflown(), "only way to reach here"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4181 guarantee(!_cm->mark_stack_overflow(), "only way to reach here"); |
| 342 | 4182 |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4183 if (_cm->verbose_low()) { |
| 342 | 4184 gclog_or_tty->print_cr("[%d] all tasks terminated", _task_id); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4185 } |
| 342 | 4186 } else { |
| 4187 // Apparently there's more work to do. Let's abort this task. It | |
| 4188 // will restart it and we can hopefully find more things to do. | |
| 4189 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4190 if (_cm->verbose_low()) { |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4191 gclog_or_tty->print_cr("[%d] apparently there is more work to do", |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4192 _task_id); |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4193 } |
| 342 | 4194 |
| 4195 set_has_aborted(); | |
| 4196 statsOnly( ++_aborted_termination ); | |
| 4197 } | |
| 4198 } | |
| 4199 | |
| 4200 // Mainly for debugging purposes to make sure that a pointer to the | |
| 4201 // closure which was statically allocated in this frame doesn't | |
| 4202 // escape it by accident. | |
| 3771 | 4203 set_cm_oop_closure(NULL); |
| 342 | 4204 double end_time_ms = os::elapsedVTime() * 1000.0; |
| 4205 double elapsed_time_ms = end_time_ms - _start_time_ms; | |
| 4206 // Update the step history. | |
| 4207 _step_times_ms.add(elapsed_time_ms); | |
| 4208 | |
| 4209 if (has_aborted()) { | |
| 4210 // The task was aborted for some reason. | |
| 4211 | |
| 4212 statsOnly( ++_aborted ); | |
| 4213 | |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
4214 if (_has_timed_out) { |
| 342 | 4215 double diff_ms = elapsed_time_ms - _time_target_ms; |
| 4216 // Keep statistics of how well we did with respect to hitting | |
| 4217 // our target only if we actually timed out (if we aborted for | |
| 4218 // other reasons, then the results might get skewed). | |
| 4219 _marking_step_diffs_ms.add(diff_ms); | |
| 4220 } | |
| 4221 | |
| 4222 if (_cm->has_overflown()) { | |
| 4223 // This is the interesting one. We aborted because a global | |
| 4224 // overflow was raised. This means we have to restart the | |
| 4225 // marking phase and start iterating over regions. However, in | |
| 4226 // order to do this we have to make sure that all tasks stop | |
| 4227 // what they are doing and re-initialise in a safe manner. We | |
| 4228 // will achieve this with the use of two barrier sync points. | |
| 4229 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4230 if (_cm->verbose_low()) { |
| 342 | 4231 gclog_or_tty->print_cr("[%d] detected overflow", _task_id); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4232 } |
| 342 | 4233 |
| 4234 _cm->enter_first_sync_barrier(_task_id); | |
| 4235 // When we exit this sync barrier we know that all tasks have | |
| 4236 // stopped doing marking work. So, it's now safe to | |
| 4237 // re-initialise our data structures. At the end of this method, | |
| 4238 // task 0 will clear the global data structures. | |
| 4239 | |
| 4240 statsOnly( ++_aborted_overflow ); | |
| 4241 | |
| 4242 // We clear the local state of this task... | |
| 4243 clear_region_fields(); | |
| 4244 | |
| 4245 // ...and enter the second barrier. | |
| 4246 _cm->enter_second_sync_barrier(_task_id); | |
| 4247 // At this point everything has bee re-initialised and we're | |
| 4248 // ready to restart. | |
| 4249 } | |
| 4250 | |
| 4251 if (_cm->verbose_low()) { | |
| 4252 gclog_or_tty->print_cr("[%d] <<<<<<<<<< ABORTING, target = %1.2lfms, " | |
| 4253 "elapsed = %1.2lfms <<<<<<<<<<", | |
| 4254 _task_id, _time_target_ms, elapsed_time_ms); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4255 if (_cm->has_aborted()) { |
| 342 | 4256 gclog_or_tty->print_cr("[%d] ========== MARKING ABORTED ==========", |
| 4257 _task_id); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4258 } |
| 342 | 4259 } |
| 4260 } else { | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4261 if (_cm->verbose_low()) { |
| 342 | 4262 gclog_or_tty->print_cr("[%d] <<<<<<<<<< FINISHED, target = %1.2lfms, " |
| 4263 "elapsed = %1.2lfms <<<<<<<<<<", | |
| 4264 _task_id, _time_target_ms, elapsed_time_ms); | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
4265 } |
| 342 | 4266 } |
| 4267 | |
| 4268 _claimed = false; | |
| 4269 } | |
| 4270 | |
| 4271 CMTask::CMTask(int task_id, | |
| 4272 ConcurrentMark* cm, | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
4273 size_t* marked_bytes, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
4274 BitMap* card_bm, |
| 342 | 4275 CMTaskQueue* task_queue, |
| 4276 CMTaskQueueSet* task_queues) | |
| 4277 : _g1h(G1CollectedHeap::heap()), | |
| 4278 _task_id(task_id), _cm(cm), | |
| 4279 _claimed(false), | |
| 4280 _nextMarkBitMap(NULL), _hash_seed(17), | |
| 4281 _task_queue(task_queue), | |
| 4282 _task_queues(task_queues), | |
| 3771 | 4283 _cm_oop_closure(NULL), |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
4284 _marked_bytes_array(marked_bytes), |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4830
diff
changeset
|
4285 _card_bm(card_bm) { |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4286 guarantee(task_queue != NULL, "invariant"); |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1022
diff
changeset
|
4287 guarantee(task_queues != NULL, "invariant"); |
| 342 | 4288 |
| 4289 statsOnly( _clock_due_to_scanning = 0; | |
| 4290 _clock_due_to_marking = 0 ); | |
| 4291 | |
| 4292 _marking_step_diffs_ms.add(0.5); | |
| 4293 } | |
|
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4294 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4295 // These are formatting macros that are used below to ensure |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4296 // consistent formatting. The *_H_* versions are used to format the |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4297 // header for a particular value and they should be kept consistent |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4298 // with the corresponding macro. Also note that most of the macros add |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4299 // the necessary white space (as a prefix) which makes them a bit |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4300 // easier to compose. |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4301 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4302 // All the output lines are prefixed with this string to be able to |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4303 // identify them easily in a large log file. |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4304 #define G1PPRL_LINE_PREFIX "###" |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4305 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4306 #define G1PPRL_ADDR_BASE_FORMAT " "PTR_FORMAT"-"PTR_FORMAT |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4307 #ifdef _LP64 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4308 #define G1PPRL_ADDR_BASE_H_FORMAT " %37s" |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4309 #else // _LP64 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4310 #define G1PPRL_ADDR_BASE_H_FORMAT " %21s" |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4311 #endif // _LP64 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4312 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4313 // For per-region info |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4314 #define G1PPRL_TYPE_FORMAT " %-4s" |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4315 #define G1PPRL_TYPE_H_FORMAT " %4s" |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4316 #define G1PPRL_BYTE_FORMAT " "SIZE_FORMAT_W(9) |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4317 #define G1PPRL_BYTE_H_FORMAT " %9s" |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4318 #define G1PPRL_DOUBLE_FORMAT " %14.1f" |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4319 #define G1PPRL_DOUBLE_H_FORMAT " %14s" |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4320 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4321 // For summary info |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4322 #define G1PPRL_SUM_ADDR_FORMAT(tag) " "tag":"G1PPRL_ADDR_BASE_FORMAT |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4323 #define G1PPRL_SUM_BYTE_FORMAT(tag) " "tag": "SIZE_FORMAT |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4324 #define G1PPRL_SUM_MB_FORMAT(tag) " "tag": %1.2f MB" |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4325 #define G1PPRL_SUM_MB_PERC_FORMAT(tag) G1PPRL_SUM_MB_FORMAT(tag)" / %1.2f %%" |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4326 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4327 G1PrintRegionLivenessInfoClosure:: |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4328 G1PrintRegionLivenessInfoClosure(outputStream* out, const char* phase_name) |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4329 : _out(out), |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4330 _total_used_bytes(0), _total_capacity_bytes(0), |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4331 _total_prev_live_bytes(0), _total_next_live_bytes(0), |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4332 _hum_used_bytes(0), _hum_capacity_bytes(0), |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4333 _hum_prev_live_bytes(0), _hum_next_live_bytes(0) { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4334 G1CollectedHeap* g1h = G1CollectedHeap::heap(); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4335 MemRegion g1_committed = g1h->g1_committed(); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4336 MemRegion g1_reserved = g1h->g1_reserved(); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4337 double now = os::elapsedTime(); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4338 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4339 // Print the header of the output. |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4340 _out->cr(); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4341 _out->print_cr(G1PPRL_LINE_PREFIX" PHASE %s @ %1.3f", phase_name, now); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4342 _out->print_cr(G1PPRL_LINE_PREFIX" HEAP" |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4343 G1PPRL_SUM_ADDR_FORMAT("committed") |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4344 G1PPRL_SUM_ADDR_FORMAT("reserved") |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4345 G1PPRL_SUM_BYTE_FORMAT("region-size"), |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4346 g1_committed.start(), g1_committed.end(), |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4347 g1_reserved.start(), g1_reserved.end(), |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3979
diff
changeset
|
4348 HeapRegion::GrainBytes); |
|
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4349 _out->print_cr(G1PPRL_LINE_PREFIX); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4350 _out->print_cr(G1PPRL_LINE_PREFIX |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4351 G1PPRL_TYPE_H_FORMAT |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4352 G1PPRL_ADDR_BASE_H_FORMAT |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4353 G1PPRL_BYTE_H_FORMAT |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4354 G1PPRL_BYTE_H_FORMAT |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4355 G1PPRL_BYTE_H_FORMAT |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4356 G1PPRL_DOUBLE_H_FORMAT, |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4357 "type", "address-range", |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4358 "used", "prev-live", "next-live", "gc-eff"); |
|
3977
5cc33133bc6d
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
3975
diff
changeset
|
4359 _out->print_cr(G1PPRL_LINE_PREFIX |
|
5cc33133bc6d
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
3975
diff
changeset
|
4360 G1PPRL_TYPE_H_FORMAT |
|
5cc33133bc6d
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
3975
diff
changeset
|
4361 G1PPRL_ADDR_BASE_H_FORMAT |
|
5cc33133bc6d
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
3975
diff
changeset
|
4362 G1PPRL_BYTE_H_FORMAT |
|
5cc33133bc6d
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
3975
diff
changeset
|
4363 G1PPRL_BYTE_H_FORMAT |
|
5cc33133bc6d
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
3975
diff
changeset
|
4364 G1PPRL_BYTE_H_FORMAT |
|
5cc33133bc6d
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
3975
diff
changeset
|
4365 G1PPRL_DOUBLE_H_FORMAT, |
|
5cc33133bc6d
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
3975
diff
changeset
|
4366 "", "", |
|
5cc33133bc6d
7092245: G1: Wrong format specifier in G1PrintRegionLivenessInfo header output
johnc
parents:
3975
diff
changeset
|
4367 "(bytes)", "(bytes)", "(bytes)", "(bytes/ms)"); |
|
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4368 } |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4369 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4370 // It takes as a parameter a reference to one of the _hum_* fields, it |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4371 // deduces the corresponding value for a region in a humongous region |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4372 // series (either the region size, or what's left if the _hum_* field |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4373 // is < the region size), and updates the _hum_* field accordingly. |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4374 size_t G1PrintRegionLivenessInfoClosure::get_hum_bytes(size_t* hum_bytes) { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4375 size_t bytes = 0; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4376 // The > 0 check is to deal with the prev and next live bytes which |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4377 // could be 0. |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4378 if (*hum_bytes > 0) { |
|
3986
65a8ff39a6da
7095194: G1: HeapRegion::GrainBytes, GrainWords, and CardsPerRegion should be size_t
johnc
parents:
3979
diff
changeset
|
4379 bytes = MIN2(HeapRegion::GrainBytes, *hum_bytes); |
|
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4380 *hum_bytes -= bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4381 } |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4382 return bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4383 } |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4384 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4385 // It deduces the values for a region in a humongous region series |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4386 // from the _hum_* fields and updates those accordingly. It assumes |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4387 // that that _hum_* fields have already been set up from the "starts |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4388 // humongous" region and we visit the regions in address order. |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4389 void G1PrintRegionLivenessInfoClosure::get_hum_bytes(size_t* used_bytes, |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4390 size_t* capacity_bytes, |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4391 size_t* prev_live_bytes, |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4392 size_t* next_live_bytes) { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4393 assert(_hum_used_bytes > 0 && _hum_capacity_bytes > 0, "pre-condition"); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4394 *used_bytes = get_hum_bytes(&_hum_used_bytes); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4395 *capacity_bytes = get_hum_bytes(&_hum_capacity_bytes); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4396 *prev_live_bytes = get_hum_bytes(&_hum_prev_live_bytes); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4397 *next_live_bytes = get_hum_bytes(&_hum_next_live_bytes); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4398 } |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4399 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4400 bool G1PrintRegionLivenessInfoClosure::doHeapRegion(HeapRegion* r) { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4401 const char* type = ""; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4402 HeapWord* bottom = r->bottom(); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4403 HeapWord* end = r->end(); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4404 size_t capacity_bytes = r->capacity(); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4405 size_t used_bytes = r->used(); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4406 size_t prev_live_bytes = r->live_bytes(); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4407 size_t next_live_bytes = r->next_live_bytes(); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4408 double gc_eff = r->gc_efficiency(); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4409 if (r->used() == 0) { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4410 type = "FREE"; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4411 } else if (r->is_survivor()) { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4412 type = "SURV"; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4413 } else if (r->is_young()) { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4414 type = "EDEN"; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4415 } else if (r->startsHumongous()) { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4416 type = "HUMS"; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4417 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4418 assert(_hum_used_bytes == 0 && _hum_capacity_bytes == 0 && |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4419 _hum_prev_live_bytes == 0 && _hum_next_live_bytes == 0, |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4420 "they should have been zeroed after the last time we used them"); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4421 // Set up the _hum_* fields. |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4422 _hum_capacity_bytes = capacity_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4423 _hum_used_bytes = used_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4424 _hum_prev_live_bytes = prev_live_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4425 _hum_next_live_bytes = next_live_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4426 get_hum_bytes(&used_bytes, &capacity_bytes, |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4427 &prev_live_bytes, &next_live_bytes); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4428 end = bottom + HeapRegion::GrainWords; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4429 } else if (r->continuesHumongous()) { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4430 type = "HUMC"; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4431 get_hum_bytes(&used_bytes, &capacity_bytes, |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4432 &prev_live_bytes, &next_live_bytes); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4433 assert(end == bottom + HeapRegion::GrainWords, "invariant"); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4434 } else { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4435 type = "OLD"; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4436 } |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4437 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4438 _total_used_bytes += used_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4439 _total_capacity_bytes += capacity_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4440 _total_prev_live_bytes += prev_live_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4441 _total_next_live_bytes += next_live_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4442 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4443 // Print a line for this particular region. |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4444 _out->print_cr(G1PPRL_LINE_PREFIX |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4445 G1PPRL_TYPE_FORMAT |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4446 G1PPRL_ADDR_BASE_FORMAT |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4447 G1PPRL_BYTE_FORMAT |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4448 G1PPRL_BYTE_FORMAT |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4449 G1PPRL_BYTE_FORMAT |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4450 G1PPRL_DOUBLE_FORMAT, |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4451 type, bottom, end, |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4452 used_bytes, prev_live_bytes, next_live_bytes, gc_eff); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4453 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4454 return false; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4455 } |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4456 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4457 G1PrintRegionLivenessInfoClosure::~G1PrintRegionLivenessInfoClosure() { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4458 // Print the footer of the output. |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4459 _out->print_cr(G1PPRL_LINE_PREFIX); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4460 _out->print_cr(G1PPRL_LINE_PREFIX |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4461 " SUMMARY" |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4462 G1PPRL_SUM_MB_FORMAT("capacity") |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4463 G1PPRL_SUM_MB_PERC_FORMAT("used") |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4464 G1PPRL_SUM_MB_PERC_FORMAT("prev-live") |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4465 G1PPRL_SUM_MB_PERC_FORMAT("next-live"), |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4466 bytes_to_mb(_total_capacity_bytes), |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4467 bytes_to_mb(_total_used_bytes), |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4468 perc(_total_used_bytes, _total_capacity_bytes), |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4469 bytes_to_mb(_total_prev_live_bytes), |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4470 perc(_total_prev_live_bytes, _total_capacity_bytes), |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4471 bytes_to_mb(_total_next_live_bytes), |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4472 perc(_total_next_live_bytes, _total_capacity_bytes)); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4473 _out->cr(); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2369
diff
changeset
|
4474 } |