Mercurial > hg > truffle
annotate src/share/vm/memory/threadLocalAllocBuffer.cpp @ 18437:7ce389a85277
Change VirtualStackSlot.toString().
author | Josef Eisl <josef.eisl@jku.at> |
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date | Tue, 11 Nov 2014 16:51:41 +0100 |
parents | 52b4284cb496 |
children | ee26b8eb1601 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2014, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "memory/genCollectedHeap.hpp" | |
27 #include "memory/resourceArea.hpp" | |
28 #include "memory/threadLocalAllocBuffer.inline.hpp" | |
29 #include "memory/universe.inline.hpp" | |
30 #include "oops/oop.inline.hpp" | |
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31 #include "runtime/thread.inline.hpp" |
1972 | 32 #include "utilities/copy.hpp" |
0 | 33 |
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34 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC |
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35 |
1972 | 36 // Thread-Local Edens support |
0 | 37 |
38 // static member initialization | |
14310 | 39 size_t ThreadLocalAllocBuffer::_max_size = 0; |
0 | 40 unsigned ThreadLocalAllocBuffer::_target_refills = 0; |
41 GlobalTLABStats* ThreadLocalAllocBuffer::_global_stats = NULL; | |
42 | |
43 void ThreadLocalAllocBuffer::clear_before_allocation() { | |
44 _slow_refill_waste += (unsigned)remaining(); | |
45 make_parsable(true); // also retire the TLAB | |
46 } | |
47 | |
48 void ThreadLocalAllocBuffer::accumulate_statistics_before_gc() { | |
49 global_stats()->initialize(); | |
50 | |
14310 | 51 for (JavaThread *thread = Threads::first(); thread != NULL; thread = thread->next()) { |
0 | 52 thread->tlab().accumulate_statistics(); |
53 thread->tlab().initialize_statistics(); | |
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54 #ifdef GRAAL |
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55 for (jint i = 0; i < thread->get_gpu_hsail_tlabs_count(); i++) { |
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56 thread->get_gpu_hsail_tlab_at(i)->accumulate_statistics(); |
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57 thread->get_gpu_hsail_tlab_at(i)->initialize_statistics(); |
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58 } |
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59 #endif |
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60 |
0 | 61 } |
62 | |
63 // Publish new stats if some allocation occurred. | |
64 if (global_stats()->allocation() != 0) { | |
65 global_stats()->publish(); | |
66 if (PrintTLAB) { | |
67 global_stats()->print(); | |
68 } | |
69 } | |
70 } | |
71 | |
72 void ThreadLocalAllocBuffer::accumulate_statistics() { | |
14310 | 73 Thread* thread = myThread(); |
74 size_t capacity = Universe::heap()->tlab_capacity(thread); | |
75 size_t used = Universe::heap()->tlab_used(thread); | |
0 | 76 |
77 _gc_waste += (unsigned)remaining(); | |
14310 | 78 size_t total_allocated = thread->allocated_bytes(); |
79 size_t allocated_since_last_gc = total_allocated - _allocated_before_last_gc; | |
80 _allocated_before_last_gc = total_allocated; | |
0 | 81 |
82 if (PrintTLAB && (_number_of_refills > 0 || Verbose)) { | |
83 print_stats("gc"); | |
84 } | |
85 | |
86 if (_number_of_refills > 0) { | |
14310 | 87 // Update allocation history if a reasonable amount of eden was allocated. |
88 bool update_allocation_history = used > 0.5 * capacity; | |
0 | 89 |
90 if (update_allocation_history) { | |
91 // Average the fraction of eden allocated in a tlab by this | |
92 // thread for use in the next resize operation. | |
93 // _gc_waste is not subtracted because it's included in | |
94 // "used". | |
14310 | 95 // The result can be larger than 1.0 due to direct to old allocations. |
96 // These allocations should ideally not be counted but since it is not possible | |
97 // to filter them out here we just cap the fraction to be at most 1.0. | |
98 double alloc_frac = MIN2(1.0, (double) allocated_since_last_gc / used); | |
0 | 99 _allocation_fraction.sample(alloc_frac); |
100 } | |
101 global_stats()->update_allocating_threads(); | |
102 global_stats()->update_number_of_refills(_number_of_refills); | |
103 global_stats()->update_allocation(_number_of_refills * desired_size()); | |
104 global_stats()->update_gc_waste(_gc_waste); | |
105 global_stats()->update_slow_refill_waste(_slow_refill_waste); | |
106 global_stats()->update_fast_refill_waste(_fast_refill_waste); | |
107 | |
108 } else { | |
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109 // (ds) _gc_waste can be non-zero (see above) even if _number_of_refills is 0 |
0 | 110 assert(_number_of_refills == 0 && _fast_refill_waste == 0 && |
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111 _slow_refill_waste == 0/* && _gc_waste == 0*/, |
0 | 112 "tlab stats == 0"); |
113 } | |
114 global_stats()->update_slow_allocations(_slow_allocations); | |
115 } | |
116 | |
117 // Fills the current tlab with a dummy filler array to create | |
118 // an illusion of a contiguous Eden and optionally retires the tlab. | |
119 // Waste accounting should be done in caller as appropriate; see, | |
120 // for example, clear_before_allocation(). | |
121 void ThreadLocalAllocBuffer::make_parsable(bool retire) { | |
122 if (end() != NULL) { | |
123 invariants(); | |
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124 |
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125 if (retire) { |
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126 myThread()->incr_allocated_bytes(used_bytes()); |
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127 } |
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128 |
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129 CollectedHeap::fill_with_object(top(), hard_end(), retire); |
0 | 130 |
131 if (retire || ZeroTLAB) { // "Reset" the TLAB | |
132 set_start(NULL); | |
133 set_top(NULL); | |
134 set_pf_top(NULL); | |
135 set_end(NULL); | |
136 } | |
137 } | |
138 assert(!(retire || ZeroTLAB) || | |
139 (start() == NULL && end() == NULL && top() == NULL), | |
140 "TLAB must be reset"); | |
141 } | |
142 | |
143 void ThreadLocalAllocBuffer::resize_all_tlabs() { | |
14310 | 144 if (ResizeTLAB) { |
145 for (JavaThread *thread = Threads::first(); thread != NULL; thread = thread->next()) { | |
146 thread->tlab().resize(); | |
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147 #ifdef GRAAL |
18041 | 148 for (jint i = 0; i < thread->get_gpu_hsail_tlabs_count(); i++) { |
149 thread->get_gpu_hsail_tlab_at(i)->resize(); | |
150 } | |
151 #endif | |
14310 | 152 } |
0 | 153 } |
154 } | |
155 | |
156 void ThreadLocalAllocBuffer::resize() { | |
14310 | 157 // Compute the next tlab size using expected allocation amount |
158 assert(ResizeTLAB, "Should not call this otherwise"); | |
159 size_t alloc = (size_t)(_allocation_fraction.average() * | |
160 (Universe::heap()->tlab_capacity(myThread()) / HeapWordSize)); | |
161 size_t new_size = alloc / _target_refills; | |
0 | 162 |
14310 | 163 new_size = MIN2(MAX2(new_size, min_size()), max_size()); |
0 | 164 |
14310 | 165 size_t aligned_new_size = align_object_size(new_size); |
0 | 166 |
14310 | 167 if (PrintTLAB && Verbose) { |
168 gclog_or_tty->print("TLAB new size: thread: " INTPTR_FORMAT " [id: %2d]" | |
169 " refills %d alloc: %8.6f desired_size: " SIZE_FORMAT " -> " SIZE_FORMAT "\n", | |
170 myThread(), myThread()->osthread()->thread_id(), | |
171 _target_refills, _allocation_fraction.average(), desired_size(), aligned_new_size); | |
0 | 172 } |
14310 | 173 set_desired_size(aligned_new_size); |
174 set_refill_waste_limit(initial_refill_waste_limit()); | |
0 | 175 } |
176 | |
177 void ThreadLocalAllocBuffer::initialize_statistics() { | |
178 _number_of_refills = 0; | |
179 _fast_refill_waste = 0; | |
180 _slow_refill_waste = 0; | |
181 _gc_waste = 0; | |
182 _slow_allocations = 0; | |
183 } | |
184 | |
185 void ThreadLocalAllocBuffer::fill(HeapWord* start, | |
186 HeapWord* top, | |
187 size_t new_size) { | |
188 _number_of_refills++; | |
189 if (PrintTLAB && Verbose) { | |
190 print_stats("fill"); | |
191 } | |
192 assert(top <= start + new_size - alignment_reserve(), "size too small"); | |
193 initialize(start, top, start + new_size - alignment_reserve()); | |
194 | |
195 // Reset amount of internal fragmentation | |
196 set_refill_waste_limit(initial_refill_waste_limit()); | |
197 } | |
198 | |
199 void ThreadLocalAllocBuffer::initialize(HeapWord* start, | |
200 HeapWord* top, | |
201 HeapWord* end) { | |
202 set_start(start); | |
203 set_top(top); | |
204 set_pf_top(top); | |
205 set_end(end); | |
206 invariants(); | |
207 } | |
208 | |
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209 void ThreadLocalAllocBuffer::initialize(Thread* owning_thread) { |
0 | 210 initialize(NULL, // start |
211 NULL, // top | |
212 NULL); // end | |
213 | |
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214 _owning_thread = owning_thread; |
0 | 215 set_desired_size(initial_desired_size()); |
216 | |
217 // Following check is needed because at startup the main (primordial) | |
218 // thread is initialized before the heap is. The initialization for | |
219 // this thread is redone in startup_initialization below. | |
220 if (Universe::heap() != NULL) { | |
221 size_t capacity = Universe::heap()->tlab_capacity(myThread()) / HeapWordSize; | |
222 double alloc_frac = desired_size() * target_refills() / (double) capacity; | |
223 _allocation_fraction.sample(alloc_frac); | |
224 } | |
225 | |
226 set_refill_waste_limit(initial_refill_waste_limit()); | |
227 | |
228 initialize_statistics(); | |
229 } | |
230 | |
231 void ThreadLocalAllocBuffer::startup_initialization() { | |
232 | |
233 // Assuming each thread's active tlab is, on average, | |
234 // 1/2 full at a GC | |
235 _target_refills = 100 / (2 * TLABWasteTargetPercent); | |
236 _target_refills = MAX2(_target_refills, (unsigned)1U); | |
237 | |
238 _global_stats = new GlobalTLABStats(); | |
239 | |
240 // During jvm startup, the main (primordial) thread is initialized | |
241 // before the heap is initialized. So reinitialize it now. | |
242 guarantee(Thread::current()->is_Java_thread(), "tlab initialization thread not Java thread"); | |
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243 Thread::current()->tlab().initialize(Thread::current()); |
0 | 244 |
245 if (PrintTLAB && Verbose) { | |
246 gclog_or_tty->print("TLAB min: " SIZE_FORMAT " initial: " SIZE_FORMAT " max: " SIZE_FORMAT "\n", | |
247 min_size(), Thread::current()->tlab().initial_desired_size(), max_size()); | |
248 } | |
249 } | |
250 | |
251 size_t ThreadLocalAllocBuffer::initial_desired_size() { | |
252 size_t init_sz; | |
253 | |
254 if (TLABSize > 0) { | |
255 init_sz = MIN2(TLABSize / HeapWordSize, max_size()); | |
256 } else if (global_stats() == NULL) { | |
257 // Startup issue - main thread initialized before heap initialized. | |
258 init_sz = min_size(); | |
259 } else { | |
260 // Initial size is a function of the average number of allocating threads. | |
261 unsigned nof_threads = global_stats()->allocating_threads_avg(); | |
262 | |
263 init_sz = (Universe::heap()->tlab_capacity(myThread()) / HeapWordSize) / | |
264 (nof_threads * target_refills()); | |
265 init_sz = align_object_size(init_sz); | |
266 init_sz = MIN2(MAX2(init_sz, min_size()), max_size()); | |
267 } | |
268 return init_sz; | |
269 } | |
270 | |
271 void ThreadLocalAllocBuffer::print_stats(const char* tag) { | |
272 Thread* thrd = myThread(); | |
273 size_t waste = _gc_waste + _slow_refill_waste + _fast_refill_waste; | |
274 size_t alloc = _number_of_refills * _desired_size; | |
275 double waste_percent = alloc == 0 ? 0.0 : | |
276 100.0 * waste / alloc; | |
14310 | 277 size_t tlab_used = Universe::heap()->tlab_used(thrd); |
0 | 278 gclog_or_tty->print("TLAB: %s thread: " INTPTR_FORMAT " [id: %2d]" |
279 " desired_size: " SIZE_FORMAT "KB" | |
280 " slow allocs: %d refill waste: " SIZE_FORMAT "B" | |
281 " alloc:%8.5f %8.0fKB refills: %d waste %4.1f%% gc: %dB" | |
282 " slow: %dB fast: %dB\n", | |
283 tag, thrd, thrd->osthread()->thread_id(), | |
284 _desired_size / (K / HeapWordSize), | |
285 _slow_allocations, _refill_waste_limit * HeapWordSize, | |
286 _allocation_fraction.average(), | |
287 _allocation_fraction.average() * tlab_used / K, | |
288 _number_of_refills, waste_percent, | |
289 _gc_waste * HeapWordSize, | |
290 _slow_refill_waste * HeapWordSize, | |
291 _fast_refill_waste * HeapWordSize); | |
292 } | |
293 | |
294 void ThreadLocalAllocBuffer::verify() { | |
295 HeapWord* p = start(); | |
296 HeapWord* t = top(); | |
297 HeapWord* prev_p = NULL; | |
298 while (p < t) { | |
299 oop(p)->verify(); | |
300 prev_p = p; | |
301 p += oop(p)->size(); | |
302 } | |
303 guarantee(p == top(), "end of last object must match end of space"); | |
304 } | |
305 | |
306 Thread* ThreadLocalAllocBuffer::myThread() { | |
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307 return _owning_thread; |
0 | 308 } |
309 | |
310 | |
311 GlobalTLABStats::GlobalTLABStats() : | |
312 _allocating_threads_avg(TLABAllocationWeight) { | |
313 | |
314 initialize(); | |
315 | |
316 _allocating_threads_avg.sample(1); // One allocating thread at startup | |
317 | |
318 if (UsePerfData) { | |
319 | |
320 EXCEPTION_MARK; | |
321 ResourceMark rm; | |
322 | |
323 char* cname = PerfDataManager::counter_name("tlab", "allocThreads"); | |
324 _perf_allocating_threads = | |
325 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_None, CHECK); | |
326 | |
327 cname = PerfDataManager::counter_name("tlab", "fills"); | |
328 _perf_total_refills = | |
329 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_None, CHECK); | |
330 | |
331 cname = PerfDataManager::counter_name("tlab", "maxFills"); | |
332 _perf_max_refills = | |
333 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_None, CHECK); | |
334 | |
335 cname = PerfDataManager::counter_name("tlab", "alloc"); | |
336 _perf_allocation = | |
337 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, CHECK); | |
338 | |
339 cname = PerfDataManager::counter_name("tlab", "gcWaste"); | |
340 _perf_gc_waste = | |
341 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, CHECK); | |
342 | |
343 cname = PerfDataManager::counter_name("tlab", "maxGcWaste"); | |
344 _perf_max_gc_waste = | |
345 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, CHECK); | |
346 | |
347 cname = PerfDataManager::counter_name("tlab", "slowWaste"); | |
348 _perf_slow_refill_waste = | |
349 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, CHECK); | |
350 | |
351 cname = PerfDataManager::counter_name("tlab", "maxSlowWaste"); | |
352 _perf_max_slow_refill_waste = | |
353 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, CHECK); | |
354 | |
355 cname = PerfDataManager::counter_name("tlab", "fastWaste"); | |
356 _perf_fast_refill_waste = | |
357 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, CHECK); | |
358 | |
359 cname = PerfDataManager::counter_name("tlab", "maxFastWaste"); | |
360 _perf_max_fast_refill_waste = | |
361 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, CHECK); | |
362 | |
363 cname = PerfDataManager::counter_name("tlab", "slowAlloc"); | |
364 _perf_slow_allocations = | |
365 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_None, CHECK); | |
366 | |
367 cname = PerfDataManager::counter_name("tlab", "maxSlowAlloc"); | |
368 _perf_max_slow_allocations = | |
369 PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_None, CHECK); | |
370 } | |
371 } | |
372 | |
373 void GlobalTLABStats::initialize() { | |
374 // Clear counters summarizing info from all threads | |
375 _allocating_threads = 0; | |
376 _total_refills = 0; | |
377 _max_refills = 0; | |
378 _total_allocation = 0; | |
379 _total_gc_waste = 0; | |
380 _max_gc_waste = 0; | |
381 _total_slow_refill_waste = 0; | |
382 _max_slow_refill_waste = 0; | |
383 _total_fast_refill_waste = 0; | |
384 _max_fast_refill_waste = 0; | |
385 _total_slow_allocations = 0; | |
386 _max_slow_allocations = 0; | |
387 } | |
388 | |
389 void GlobalTLABStats::publish() { | |
390 _allocating_threads_avg.sample(_allocating_threads); | |
391 if (UsePerfData) { | |
392 _perf_allocating_threads ->set_value(_allocating_threads); | |
393 _perf_total_refills ->set_value(_total_refills); | |
394 _perf_max_refills ->set_value(_max_refills); | |
395 _perf_allocation ->set_value(_total_allocation); | |
396 _perf_gc_waste ->set_value(_total_gc_waste); | |
397 _perf_max_gc_waste ->set_value(_max_gc_waste); | |
398 _perf_slow_refill_waste ->set_value(_total_slow_refill_waste); | |
399 _perf_max_slow_refill_waste->set_value(_max_slow_refill_waste); | |
400 _perf_fast_refill_waste ->set_value(_total_fast_refill_waste); | |
401 _perf_max_fast_refill_waste->set_value(_max_fast_refill_waste); | |
402 _perf_slow_allocations ->set_value(_total_slow_allocations); | |
403 _perf_max_slow_allocations ->set_value(_max_slow_allocations); | |
404 } | |
405 } | |
406 | |
407 void GlobalTLABStats::print() { | |
408 size_t waste = _total_gc_waste + _total_slow_refill_waste + _total_fast_refill_waste; | |
409 double waste_percent = _total_allocation == 0 ? 0.0 : | |
410 100.0 * waste / _total_allocation; | |
411 gclog_or_tty->print("TLAB totals: thrds: %d refills: %d max: %d" | |
412 " slow allocs: %d max %d waste: %4.1f%%" | |
413 " gc: " SIZE_FORMAT "B max: " SIZE_FORMAT "B" | |
414 " slow: " SIZE_FORMAT "B max: " SIZE_FORMAT "B" | |
415 " fast: " SIZE_FORMAT "B max: " SIZE_FORMAT "B\n", | |
416 _allocating_threads, | |
417 _total_refills, _max_refills, | |
418 _total_slow_allocations, _max_slow_allocations, | |
419 waste_percent, | |
420 _total_gc_waste * HeapWordSize, | |
421 _max_gc_waste * HeapWordSize, | |
422 _total_slow_refill_waste * HeapWordSize, | |
423 _max_slow_refill_waste * HeapWordSize, | |
424 _total_fast_refill_waste * HeapWordSize, | |
425 _max_fast_refill_waste * HeapWordSize); | |
426 } |