truffle: src/share/vm/memory/collectorPolicy.cpp annotate

annotate src/share/vm/memory/collectorPolicy.cpp @ 12238:9e11762cee52

8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize Reviewed-by: jwilhelm, brutisso, tschatzl

author	stefank
date	Fri, 13 Sep 2013 22:22:14 +0200
parents	40136aa2cdb1
children	9ecd6d3782b1

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
8013 95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1387 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1387 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: 1387 diff changeset	21 * questions.
0 a61af66fc99e Initial load duke parents: diff changeset	22 *
a61af66fc99e Initial load duke parents: diff changeset	23 */
a61af66fc99e Initial load duke parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	25 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	26 #include "gc_implementation/shared/adaptiveSizePolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	27 #include "gc_implementation/shared/gcPolicyCounters.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	28 #include "gc_implementation/shared/vmGCOperations.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	29 #include "memory/cardTableRS.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	30 #include "memory/collectorPolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	31 #include "memory/gcLocker.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	32 #include "memory/genCollectedHeap.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	33 #include "memory/generationSpec.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	34 #include "memory/space.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	35 #include "memory/universe.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	36 #include "runtime/arguments.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	37 #include "runtime/globals_extension.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	38 #include "runtime/handles.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	39 #include "runtime/java.hpp"
7180 f34d701e952e 8003935: Simplify the needed includes for using Thread::current() stefank parents: 6923 diff changeset	40 #include "runtime/thread.inline.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	41 #include "runtime/vmThread.hpp"
8001 db9981fd3124 8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS jprovino parents: 7451 diff changeset	42 #include "utilities/macros.hpp"
db9981fd3124 8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS jprovino parents: 7451 diff changeset	43 #if INCLUDE_ALL_GCS
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	44 #include "gc_implementation/concurrentMarkSweep/cmsAdaptiveSizePolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1888 diff changeset	45 #include "gc_implementation/concurrentMarkSweep/cmsGCAdaptivePolicyCounters.hpp"
8001 db9981fd3124 8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS jprovino parents: 7451 diff changeset	46 #endif // INCLUDE_ALL_GCS
0 a61af66fc99e Initial load duke parents: diff changeset	47
a61af66fc99e Initial load duke parents: diff changeset	48 // CollectorPolicy methods.
a61af66fc99e Initial load duke parents: diff changeset	49
12238 9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	50 // Align down. If the aligning result in 0, return 'alignment'.
9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	51 static size_t restricted_align_down(size_t size, size_t alignment) {
9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	52 return MAX2(alignment, align_size_down_(size, alignment));
9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	53 }
9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	54
0 a61af66fc99e Initial load duke parents: diff changeset	55 void CollectorPolicy::initialize_flags() {
10239 f14063dcd52a 8013791: G1: G1CollectorPolicy::initialize_flags() may set min_alignment > max_alignment brutisso parents: 10135 diff changeset	56 assert(max_alignment() >= min_alignment(),
f14063dcd52a 8013791: G1: G1CollectorPolicy::initialize_flags() may set min_alignment > max_alignment brutisso parents: 10135 diff changeset	57 err_msg("max_alignment: " SIZE_FORMAT " less than min_alignment: " SIZE_FORMAT,
f14063dcd52a 8013791: G1: G1CollectorPolicy::initialize_flags() may set min_alignment > max_alignment brutisso parents: 10135 diff changeset	58 max_alignment(), min_alignment()));
f14063dcd52a 8013791: G1: G1CollectorPolicy::initialize_flags() may set min_alignment > max_alignment brutisso parents: 10135 diff changeset	59 assert(max_alignment() % min_alignment() == 0,
f14063dcd52a 8013791: G1: G1CollectorPolicy::initialize_flags() may set min_alignment > max_alignment brutisso parents: 10135 diff changeset	60 err_msg("max_alignment: " SIZE_FORMAT " not aligned by min_alignment: " SIZE_FORMAT,
f14063dcd52a 8013791: G1: G1CollectorPolicy::initialize_flags() may set min_alignment > max_alignment brutisso parents: 10135 diff changeset	61 max_alignment(), min_alignment()));
f14063dcd52a 8013791: G1: G1CollectorPolicy::initialize_flags() may set min_alignment > max_alignment brutisso parents: 10135 diff changeset	62
10241 d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	63 if (MaxHeapSize < InitialHeapSize) {
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	64 vm_exit_during_initialization("Incompatible initial and maximum heap sizes specified");
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	65 }
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	66
12238 9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	67 if (!is_size_aligned(MaxMetaspaceSize, max_alignment())) {
9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	68 FLAG_SET_ERGO(uintx, MaxMetaspaceSize,
9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	69 restricted_align_down(MaxMetaspaceSize, max_alignment()));
0 a61af66fc99e Initial load duke parents: diff changeset	70 }
12238 9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	71
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	72 if (MetaspaceSize > MaxMetaspaceSize) {
12238 9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	73 FLAG_SET_ERGO(uintx, MetaspaceSize, MaxMetaspaceSize);
1795 a8b66e00933b 6984368: Large default heap size does not allow to use zero based compressed oops kvn parents: 1552 diff changeset	74 }
0 a61af66fc99e Initial load duke parents: diff changeset	75
12238 9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	76 if (!is_size_aligned(MetaspaceSize, min_alignment())) {
9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	77 FLAG_SET_ERGO(uintx, MetaspaceSize,
9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	78 restricted_align_down(MetaspaceSize, min_alignment()));
9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	79 }
9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	80
9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	81 assert(MetaspaceSize <= MaxMetaspaceSize, "Must be");
9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	82
9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	83 MinMetaspaceExpansion = restricted_align_down(MinMetaspaceExpansion, min_alignment());
9e11762cee52 8024650: Don't adjust MaxMetaspaceSize up to MetaspaceSize stefank parents: 12233 diff changeset	84 MaxMetaspaceExpansion = restricted_align_down(MaxMetaspaceExpansion, min_alignment());
0 a61af66fc99e Initial load duke parents: diff changeset	85
a61af66fc99e Initial load duke parents: diff changeset	86 MinHeapDeltaBytes = align_size_up(MinHeapDeltaBytes, min_alignment());
a61af66fc99e Initial load duke parents: diff changeset	87
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	88 assert(MetaspaceSize % min_alignment() == 0, "metapace alignment");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	89 assert(MaxMetaspaceSize % max_alignment() == 0, "maximum metaspace alignment");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	90 if (MetaspaceSize < 256*K) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	91 vm_exit_during_initialization("Too small initial Metaspace size");
0 a61af66fc99e Initial load duke parents: diff changeset	92 }
a61af66fc99e Initial load duke parents: diff changeset	93 }
a61af66fc99e Initial load duke parents: diff changeset	94
a61af66fc99e Initial load duke parents: diff changeset	95 void CollectorPolicy::initialize_size_info() {
10241 d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	96 // User inputs from -mx and ms must be aligned
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	97 set_min_heap_byte_size(align_size_up(Arguments::min_heap_size(), min_alignment()));
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	98 set_initial_heap_byte_size(align_size_up(InitialHeapSize, min_alignment()));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	99 set_max_heap_byte_size(align_size_up(MaxHeapSize, max_alignment()));
0 a61af66fc99e Initial load duke parents: diff changeset	100
a61af66fc99e Initial load duke parents: diff changeset	101 // Check heap parameter properties
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	102 if (initial_heap_byte_size() < M) {
0 a61af66fc99e Initial load duke parents: diff changeset	103 vm_exit_during_initialization("Too small initial heap");
a61af66fc99e Initial load duke parents: diff changeset	104 }
a61af66fc99e Initial load duke parents: diff changeset	105 // Check heap parameter properties
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	106 if (min_heap_byte_size() < M) {
0 a61af66fc99e Initial load duke parents: diff changeset	107 vm_exit_during_initialization("Too small minimum heap");
a61af66fc99e Initial load duke parents: diff changeset	108 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	109 if (initial_heap_byte_size() <= NewSize) {
0 a61af66fc99e Initial load duke parents: diff changeset	110 // make sure there is at least some room in old space
a61af66fc99e Initial load duke parents: diff changeset	111 vm_exit_during_initialization("Too small initial heap for new size specified");
a61af66fc99e Initial load duke parents: diff changeset	112 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	113 if (max_heap_byte_size() < min_heap_byte_size()) {
0 a61af66fc99e Initial load duke parents: diff changeset	114 vm_exit_during_initialization("Incompatible minimum and maximum heap sizes specified");
a61af66fc99e Initial load duke parents: diff changeset	115 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	116 if (initial_heap_byte_size() < min_heap_byte_size()) {
0 a61af66fc99e Initial load duke parents: diff changeset	117 vm_exit_during_initialization("Incompatible minimum and initial heap sizes specified");
a61af66fc99e Initial load duke parents: diff changeset	118 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	119 if (max_heap_byte_size() < initial_heap_byte_size()) {
0 a61af66fc99e Initial load duke parents: diff changeset	120 vm_exit_during_initialization("Incompatible initial and maximum heap sizes specified");
a61af66fc99e Initial load duke parents: diff changeset	121 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	122
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	123 if (PrintGCDetails && Verbose) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	124 gclog_or_tty->print_cr("Minimum heap " SIZE_FORMAT " Initial heap "
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	125 SIZE_FORMAT " Maximum heap " SIZE_FORMAT,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	126 min_heap_byte_size(), initial_heap_byte_size(), max_heap_byte_size());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	127 }
0 a61af66fc99e Initial load duke parents: diff changeset	128 }
a61af66fc99e Initial load duke parents: diff changeset	129
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	130 bool CollectorPolicy::use_should_clear_all_soft_refs(bool v) {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	131 bool result = _should_clear_all_soft_refs;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	132 set_should_clear_all_soft_refs(false);
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	133 return result;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	134 }
0 a61af66fc99e Initial load duke parents: diff changeset	135
a61af66fc99e Initial load duke parents: diff changeset	136 GenRemSet* CollectorPolicy::create_rem_set(MemRegion whole_heap,
a61af66fc99e Initial load duke parents: diff changeset	137 int max_covered_regions) {
a61af66fc99e Initial load duke parents: diff changeset	138 switch (rem_set_name()) {
a61af66fc99e Initial load duke parents: diff changeset	139 case GenRemSet::CardTable: {
a61af66fc99e Initial load duke parents: diff changeset	140 CardTableRS* res = new CardTableRS(whole_heap, max_covered_regions);
a61af66fc99e Initial load duke parents: diff changeset	141 return res;
a61af66fc99e Initial load duke parents: diff changeset	142 }
a61af66fc99e Initial load duke parents: diff changeset	143 default:
a61af66fc99e Initial load duke parents: diff changeset	144 guarantee(false, "unrecognized GenRemSet::Name");
a61af66fc99e Initial load duke parents: diff changeset	145 return NULL;
a61af66fc99e Initial load duke parents: diff changeset	146 }
a61af66fc99e Initial load duke parents: diff changeset	147 }
a61af66fc99e Initial load duke parents: diff changeset	148
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	149 void CollectorPolicy::cleared_all_soft_refs() {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	150 // If near gc overhear limit, continue to clear SoftRefs. SoftRefs may
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	151 // have been cleared in the last collection but if the gc overhear
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	152 // limit continues to be near, SoftRefs should still be cleared.
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	153 if (size_policy() != NULL) {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	154 _should_clear_all_soft_refs = size_policy()->gc_overhead_limit_near();
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	155 }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	156 _all_soft_refs_clear = true;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	157 }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	158
12233 40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	159 size_t CollectorPolicy::compute_max_alignment() {
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	160 // The card marking array and the offset arrays for old generations are
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	161 // committed in os pages as well. Make sure they are entirely full (to
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	162 // avoid partial page problems), e.g. if 512 bytes heap corresponds to 1
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	163 // byte entry and the os page size is 4096, the maximum heap size should
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	164 // be 512*4096 = 2MB aligned.
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	165
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	166 // There is only the GenRemSet in Hotspot and only the GenRemSet::CardTable
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	167 // is supported.
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	168 // Requirements of any new remembered set implementations must be added here.
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	169 size_t alignment = GenRemSet::max_alignment_constraint(GenRemSet::CardTable);
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	170
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	171 // Parallel GC does its own alignment of the generations to avoid requiring a
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	172 // large page (256M on some platforms) for the permanent generation. The
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	173 // other collectors should also be updated to do their own alignment and then
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	174 // this use of lcm() should be removed.
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	175 if (UseLargePages && !UseParallelGC) {
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	176 // in presence of large pages we have to make sure that our
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	177 // alignment is large page aware
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	178 alignment = lcm(os::large_page_size(), alignment);
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	179 }
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	180
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	181 return alignment;
40136aa2cdb1 8010722: assert: failed: heap size is too big for compressed oops tschatzl parents: 12110 diff changeset	182 }
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	183
0 a61af66fc99e Initial load duke parents: diff changeset	184 // GenCollectorPolicy methods.
a61af66fc99e Initial load duke parents: diff changeset	185
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	186 size_t GenCollectorPolicy::scale_by_NewRatio_aligned(size_t base_size) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	187 size_t x = base_size / (NewRatio+1);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	188 size_t new_gen_size = x > min_alignment() ?
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	189 align_size_down(x, min_alignment()) :
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	190 min_alignment();
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	191 return new_gen_size;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	192 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	193
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	194 size_t GenCollectorPolicy::bound_minus_alignment(size_t desired_size,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	195 size_t maximum_size) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	196 size_t alignment = min_alignment();
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	197 size_t max_minus = maximum_size - alignment;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	198 return desired_size < max_minus ? desired_size : max_minus;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	199 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	200
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	201
0 a61af66fc99e Initial load duke parents: diff changeset	202 void GenCollectorPolicy::initialize_size_policy(size_t init_eden_size,
a61af66fc99e Initial load duke parents: diff changeset	203 size_t init_promo_size,
a61af66fc99e Initial load duke parents: diff changeset	204 size_t init_survivor_size) {
8072 fd7b3770c77e 8007764: Wrong initialized value of max_gc_pause_sec for an instance of class AdaptiveSizePolicy tamao parents: 8016 diff changeset	205 const double max_gc_pause_sec = ((double) MaxGCPauseMillis)/1000.0;
0 a61af66fc99e Initial load duke parents: diff changeset	206 _size_policy = new AdaptiveSizePolicy(init_eden_size,
a61af66fc99e Initial load duke parents: diff changeset	207 init_promo_size,
a61af66fc99e Initial load duke parents: diff changeset	208 init_survivor_size,
8072 fd7b3770c77e 8007764: Wrong initialized value of max_gc_pause_sec for an instance of class AdaptiveSizePolicy tamao parents: 8016 diff changeset	209 max_gc_pause_sec,
0 a61af66fc99e Initial load duke parents: diff changeset	210 GCTimeRatio);
a61af66fc99e Initial load duke parents: diff changeset	211 }
a61af66fc99e Initial load duke parents: diff changeset	212
a61af66fc99e Initial load duke parents: diff changeset	213 void GenCollectorPolicy::initialize_flags() {
a61af66fc99e Initial load duke parents: diff changeset	214 // All sizes must be multiples of the generation granularity.
a61af66fc99e Initial load duke parents: diff changeset	215 set_min_alignment((uintx) Generation::GenGrain);
a61af66fc99e Initial load duke parents: diff changeset	216 set_max_alignment(compute_max_alignment());
a61af66fc99e Initial load duke parents: diff changeset	217
a61af66fc99e Initial load duke parents: diff changeset	218 CollectorPolicy::initialize_flags();
a61af66fc99e Initial load duke parents: diff changeset	219
a61af66fc99e Initial load duke parents: diff changeset	220 // All generational heaps have a youngest gen; handle those flags here.
a61af66fc99e Initial load duke parents: diff changeset	221
a61af66fc99e Initial load duke parents: diff changeset	222 // Adjust max size parameters
a61af66fc99e Initial load duke parents: diff changeset	223 if (NewSize > MaxNewSize) {
a61af66fc99e Initial load duke parents: diff changeset	224 MaxNewSize = NewSize;
a61af66fc99e Initial load duke parents: diff changeset	225 }
a61af66fc99e Initial load duke parents: diff changeset	226 NewSize = align_size_down(NewSize, min_alignment());
a61af66fc99e Initial load duke parents: diff changeset	227 MaxNewSize = align_size_down(MaxNewSize, min_alignment());
a61af66fc99e Initial load duke parents: diff changeset	228
a61af66fc99e Initial load duke parents: diff changeset	229 // Check validity of heap flags
a61af66fc99e Initial load duke parents: diff changeset	230 assert(NewSize % min_alignment() == 0, "eden space alignment");
a61af66fc99e Initial load duke parents: diff changeset	231 assert(MaxNewSize % min_alignment() == 0, "survivor space alignment");
a61af66fc99e Initial load duke parents: diff changeset	232
a61af66fc99e Initial load duke parents: diff changeset	233 if (NewSize < 3*min_alignment()) {
a61af66fc99e Initial load duke parents: diff changeset	234 // make sure there room for eden and two survivor spaces
a61af66fc99e Initial load duke parents: diff changeset	235 vm_exit_during_initialization("Too small new size specified");
a61af66fc99e Initial load duke parents: diff changeset	236 }
a61af66fc99e Initial load duke parents: diff changeset	237 if (SurvivorRatio < 1 \|\| NewRatio < 1) {
a61af66fc99e Initial load duke parents: diff changeset	238 vm_exit_during_initialization("Invalid heap ratio specified");
a61af66fc99e Initial load duke parents: diff changeset	239 }
a61af66fc99e Initial load duke parents: diff changeset	240 }
a61af66fc99e Initial load duke parents: diff changeset	241
a61af66fc99e Initial load duke parents: diff changeset	242 void TwoGenerationCollectorPolicy::initialize_flags() {
a61af66fc99e Initial load duke parents: diff changeset	243 GenCollectorPolicy::initialize_flags();
a61af66fc99e Initial load duke parents: diff changeset	244
a61af66fc99e Initial load duke parents: diff changeset	245 OldSize = align_size_down(OldSize, min_alignment());
8013 95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	246
95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	247 if (FLAG_IS_CMDLINE(OldSize) && FLAG_IS_DEFAULT(NewSize)) {
95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	248 // NewRatio will be used later to set the young generation size so we use
95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	249 // it to calculate how big the heap should be based on the requested OldSize
95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	250 // and NewRatio.
95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	251 assert(NewRatio > 0, "NewRatio should have been set up earlier");
95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	252 size_t calculated_heapsize = (OldSize / NewRatio) * (NewRatio + 1);
95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	253
95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	254 calculated_heapsize = align_size_up(calculated_heapsize, max_alignment());
95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	255 MaxHeapSize = calculated_heapsize;
95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	256 InitialHeapSize = calculated_heapsize;
95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	257 }
0 a61af66fc99e Initial load duke parents: diff changeset	258 MaxHeapSize = align_size_up(MaxHeapSize, max_alignment());
a61af66fc99e Initial load duke parents: diff changeset	259
10241 d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	260 // adjust max heap size if necessary
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	261 if (NewSize + OldSize > MaxHeapSize) {
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	262 if (FLAG_IS_CMDLINE(MaxHeapSize)) {
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	263 // somebody set a maximum heap size with the intention that we should not
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	264 // exceed it. Adjust New/OldSize as necessary.
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	265 uintx calculated_size = NewSize + OldSize;
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	266 double shrink_factor = (double) MaxHeapSize / calculated_size;
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	267 // align
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	268 NewSize = align_size_down((uintx) (NewSize * shrink_factor), min_alignment());
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	269 // OldSize is already aligned because above we aligned MaxHeapSize to
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	270 // max_alignment(), and we just made sure that NewSize is aligned to
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	271 // min_alignment(). In initialize_flags() we verified that max_alignment()
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	272 // is a multiple of min_alignment().
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	273 OldSize = MaxHeapSize - NewSize;
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	274 } else {
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	275 MaxHeapSize = NewSize + OldSize;
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	276 }
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	277 }
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	278 // need to do this again
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	279 MaxHeapSize = align_size_up(MaxHeapSize, max_alignment());
d17700c82d7d 8006088: Incompatible heap size flags accepted by VM tschatzl parents: 10239 diff changeset	280
10284 7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	281 // adjust max heap size if necessary
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	282 if (NewSize + OldSize > MaxHeapSize) {
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	283 if (FLAG_IS_CMDLINE(MaxHeapSize)) {
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	284 // somebody set a maximum heap size with the intention that we should not
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	285 // exceed it. Adjust New/OldSize as necessary.
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	286 uintx calculated_size = NewSize + OldSize;
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	287 double shrink_factor = (double) MaxHeapSize / calculated_size;
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	288 // align
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	289 NewSize = align_size_down((uintx) (NewSize * shrink_factor), min_alignment());
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	290 // OldSize is already aligned because above we aligned MaxHeapSize to
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	291 // max_alignment(), and we just made sure that NewSize is aligned to
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	292 // min_alignment(). In initialize_flags() we verified that max_alignment()
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	293 // is a multiple of min_alignment().
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	294 OldSize = MaxHeapSize - NewSize;
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	295 } else {
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	296 MaxHeapSize = NewSize + OldSize;
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	297 }
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	298 }
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	299 // need to do this again
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	300 MaxHeapSize = align_size_up(MaxHeapSize, max_alignment());
7a95933197d0 8014058: Regression tests for 8006088 tschatzl parents: 10241 diff changeset	301
0 a61af66fc99e Initial load duke parents: diff changeset	302 always_do_update_barrier = UseConcMarkSweepGC;
a61af66fc99e Initial load duke parents: diff changeset	303
a61af66fc99e Initial load duke parents: diff changeset	304 // Check validity of heap flags
a61af66fc99e Initial load duke parents: diff changeset	305 assert(OldSize % min_alignment() == 0, "old space alignment");
a61af66fc99e Initial load duke parents: diff changeset	306 assert(MaxHeapSize % max_alignment() == 0, "maximum heap alignment");
a61af66fc99e Initial load duke parents: diff changeset	307 }
a61af66fc99e Initial load duke parents: diff changeset	308
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	309 // Values set on the command line win over any ergonomically
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	310 // set command line parameters.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	311 // Ergonomic choice of parameters are done before this
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	312 // method is called. Values for command line parameters such as NewSize
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	313 // and MaxNewSize feed those ergonomic choices into this method.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	314 // This method makes the final generation sizings consistent with
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	315 // themselves and with overall heap sizings.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	316 // In the absence of explicitly set command line flags, policies
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	317 // such as the use of NewRatio are used to size the generation.
0 a61af66fc99e Initial load duke parents: diff changeset	318 void GenCollectorPolicy::initialize_size_info() {
a61af66fc99e Initial load duke parents: diff changeset	319 CollectorPolicy::initialize_size_info();
a61af66fc99e Initial load duke parents: diff changeset	320
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	321 // min_alignment() is used for alignment within a generation.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	322 // There is additional alignment done down stream for some
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	323 // collectors that sometimes causes unwanted rounding up of
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	324 // generations sizes.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	325
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	326 // Determine maximum size of gen0
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	327
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	328 size_t max_new_size = 0;
2368 dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	329 if (FLAG_IS_CMDLINE(MaxNewSize) \|\| FLAG_IS_ERGO(MaxNewSize)) {
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	330 if (MaxNewSize < min_alignment()) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	331 max_new_size = min_alignment();
2368 dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	332 }
dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	333 if (MaxNewSize >= max_heap_byte_size()) {
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	334 max_new_size = align_size_down(max_heap_byte_size() - min_alignment(),
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	335 min_alignment());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	336 warning("MaxNewSize (" SIZE_FORMAT "k) is equal to or "
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	337 "greater than the entire heap (" SIZE_FORMAT "k). A "
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	338 "new generation size of " SIZE_FORMAT "k will be used.",
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	339 MaxNewSize/K, max_heap_byte_size()/K, max_new_size/K);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	340 } else {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	341 max_new_size = align_size_down(MaxNewSize, min_alignment());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	342 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	343
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	344 // The case for FLAG_IS_ERGO(MaxNewSize) could be treated
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	345 // specially at this point to just use an ergonomically set
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	346 // MaxNewSize to set max_new_size. For cases with small
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	347 // heaps such a policy often did not work because the MaxNewSize
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	348 // was larger than the entire heap. The interpretation given
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	349 // to ergonomically set flags is that the flags are set
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	350 // by different collectors for their own special needs but
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	351 // are not allowed to badly shape the heap. This allows the
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	352 // different collectors to decide what's best for themselves
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	353 // without having to factor in the overall heap shape. It
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	354 // can be the case in the future that the collectors would
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	355 // only make "wise" ergonomics choices and this policy could
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	356 // just accept those choices. The choices currently made are
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	357 // not always "wise".
0 a61af66fc99e Initial load duke parents: diff changeset	358 } else {
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	359 max_new_size = scale_by_NewRatio_aligned(max_heap_byte_size());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	360 // Bound the maximum size by NewSize below (since it historically
0 a61af66fc99e Initial load duke parents: diff changeset	361 // would have been NewSize and because the NewRatio calculation could
a61af66fc99e Initial load duke parents: diff changeset	362 // yield a size that is too small) and bound it by MaxNewSize above.
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	363 // Ergonomics plays here by previously calculating the desired
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	364 // NewSize and MaxNewSize.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	365 max_new_size = MIN2(MAX2(max_new_size, NewSize), MaxNewSize);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	366 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	367 assert(max_new_size > 0, "All paths should set max_new_size");
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	368
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	369 // Given the maximum gen0 size, determine the initial and
2368 dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	370 // minimum gen0 sizes.
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	371
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	372 if (max_heap_byte_size() == min_heap_byte_size()) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	373 // The maximum and minimum heap sizes are the same so
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	374 // the generations minimum and initial must be the
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	375 // same as its maximum.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	376 set_min_gen0_size(max_new_size);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	377 set_initial_gen0_size(max_new_size);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	378 set_max_gen0_size(max_new_size);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	379 } else {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	380 size_t desired_new_size = 0;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	381 if (!FLAG_IS_DEFAULT(NewSize)) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	382 // If NewSize is set ergonomically (for example by cms), it
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	383 // would make sense to use it. If it is used, also use it
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	384 // to set the initial size. Although there is no reason
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	385 // the minimum size and the initial size have to be the same,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	386 // the current implementation gets into trouble during the calculation
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	387 // of the tenured generation sizes if they are different.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	388 // Note that this makes the initial size and the minimum size
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	389 // generally small compared to the NewRatio calculation.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	390 _min_gen0_size = NewSize;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	391 desired_new_size = NewSize;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	392 max_new_size = MAX2(max_new_size, NewSize);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	393 } else {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	394 // For the case where NewSize is the default, use NewRatio
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	395 // to size the minimum and initial generation sizes.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	396 // Use the default NewSize as the floor for these values. If
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	397 // NewRatio is overly large, the resulting sizes can be too
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	398 // small.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	399 _min_gen0_size = MAX2(scale_by_NewRatio_aligned(min_heap_byte_size()),
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	400 NewSize);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	401 desired_new_size =
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	402 MAX2(scale_by_NewRatio_aligned(initial_heap_byte_size()),
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	403 NewSize);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	404 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	405
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	406 assert(_min_gen0_size > 0, "Sanity check");
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	407 set_initial_gen0_size(desired_new_size);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	408 set_max_gen0_size(max_new_size);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	409
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	410 // At this point the desirable initial and minimum sizes have been
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	411 // determined without regard to the maximum sizes.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	412
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	413 // Bound the sizes by the corresponding overall heap sizes.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	414 set_min_gen0_size(
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	415 bound_minus_alignment(_min_gen0_size, min_heap_byte_size()));
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	416 set_initial_gen0_size(
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	417 bound_minus_alignment(_initial_gen0_size, initial_heap_byte_size()));
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	418 set_max_gen0_size(
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	419 bound_minus_alignment(_max_gen0_size, max_heap_byte_size()));
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	420
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	421 // At this point all three sizes have been checked against the
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	422 // maximum sizes but have not been checked for consistency
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	423 // among the three.
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	424
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	425 // Final check min <= initial <= max
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	426 set_min_gen0_size(MIN2(_min_gen0_size, _max_gen0_size));
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	427 set_initial_gen0_size(
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	428 MAX2(MIN2(_initial_gen0_size, _max_gen0_size), _min_gen0_size));
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	429 set_min_gen0_size(MIN2(_min_gen0_size, _initial_gen0_size));
0 a61af66fc99e Initial load duke parents: diff changeset	430 }
a61af66fc99e Initial load duke parents: diff changeset	431
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	432 if (PrintGCDetails && Verbose) {
2368 dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	433 gclog_or_tty->print_cr("1: Minimum gen0 " SIZE_FORMAT " Initial gen0 "
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	434 SIZE_FORMAT " Maximum gen0 " SIZE_FORMAT,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	435 min_gen0_size(), initial_gen0_size(), max_gen0_size());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	436 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	437 }
0 a61af66fc99e Initial load duke parents: diff changeset	438
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	439 // Call this method during the sizing of the gen1 to make
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	440 // adjustments to gen0 because of gen1 sizing policy. gen0 initially has
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	441 // the most freedom in sizing because it is done before the
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	442 // policy for gen1 is applied. Once gen1 policies have been applied,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	443 // there may be conflicts in the shape of the heap and this method
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	444 // is used to make the needed adjustments. The application of the
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	445 // policies could be more sophisticated (iterative for example) but
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	446 // keeping it simple also seems a worthwhile goal.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	447 bool TwoGenerationCollectorPolicy::adjust_gen0_sizes(size_t* gen0_size_ptr,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	448 size_t* gen1_size_ptr,
8013 95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	449 const size_t heap_size,
95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	450 const size_t min_gen1_size) {
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	451 bool result = false;
8013 95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	452
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	453 if ((gen1_size_ptr + gen0_size_ptr) > heap_size) {
8013 95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	454 if ((heap_size < (*gen0_size_ptr + min_gen1_size)) &&
95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	455 (heap_size >= min_gen1_size + min_alignment())) {
95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	456 // Adjust gen0 down to accommodate min_gen1_size
95ccff9eee8e 6348447: Specifying -XX:OldSize crashes 64-bit VMs jwilhelm parents: 7451 diff changeset	457 *gen0_size_ptr = heap_size - min_gen1_size;
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	458 *gen0_size_ptr =
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	459 MAX2((uintx)align_size_down(*gen0_size_ptr, min_alignment()),
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	460 min_alignment());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	461 assert(*gen0_size_ptr > 0, "Min gen0 is too large");
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	462 result = true;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	463 } else {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	464 gen1_size_ptr = heap_size - gen0_size_ptr;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	465 *gen1_size_ptr =
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	466 MAX2((uintx)align_size_down(*gen1_size_ptr, min_alignment()),
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	467 min_alignment());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	468 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	469 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	470 return result;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	471 }
0 a61af66fc99e Initial load duke parents: diff changeset	472
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	473 // Minimum sizes of the generations may be different than
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	474 // the initial sizes. An inconsistently is permitted here
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	475 // in the total size that can be specified explicitly by
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	476 // command line specification of OldSize and NewSize and
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	477 // also a command line specification of -Xms. Issue a warning
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	478 // but allow the values to pass.
0 a61af66fc99e Initial load duke parents: diff changeset	479
a61af66fc99e Initial load duke parents: diff changeset	480 void TwoGenerationCollectorPolicy::initialize_size_info() {
a61af66fc99e Initial load duke parents: diff changeset	481 GenCollectorPolicy::initialize_size_info();
a61af66fc99e Initial load duke parents: diff changeset	482
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	483 // At this point the minimum, initial and maximum sizes
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	484 // of the overall heap and of gen0 have been determined.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	485 // The maximum gen1 size can be determined from the maximum gen0
2368 dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	486 // and maximum heap size since no explicit flags exits
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	487 // for setting the gen1 maximum.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	488 _max_gen1_size = max_heap_byte_size() - _max_gen0_size;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	489 _max_gen1_size =
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	490 MAX2((uintx)align_size_down(_max_gen1_size, min_alignment()),
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	491 min_alignment());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	492 // If no explicit command line flag has been set for the
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	493 // gen1 size, use what is left for gen1.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	494 if (FLAG_IS_DEFAULT(OldSize) \|\| FLAG_IS_ERGO(OldSize)) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	495 // The user has not specified any value or ergonomics
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	496 // has chosen a value (which may or may not be consistent
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	497 // with the overall heap size). In either case make
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	498 // the minimum, maximum and initial sizes consistent
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	499 // with the gen0 sizes and the overall heap sizes.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	500 assert(min_heap_byte_size() > _min_gen0_size,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	501 "gen0 has an unexpected minimum size");
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	502 set_min_gen1_size(min_heap_byte_size() - min_gen0_size());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	503 set_min_gen1_size(
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	504 MAX2((uintx)align_size_down(_min_gen1_size, min_alignment()),
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	505 min_alignment()));
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	506 set_initial_gen1_size(initial_heap_byte_size() - initial_gen0_size());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	507 set_initial_gen1_size(
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	508 MAX2((uintx)align_size_down(_initial_gen1_size, min_alignment()),
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	509 min_alignment()));
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	510
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	511 } else {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	512 // It's been explicitly set on the command line. Use the
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	513 // OldSize and then determine the consequences.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	514 set_min_gen1_size(OldSize);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	515 set_initial_gen1_size(OldSize);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	516
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	517 // If the user has explicitly set an OldSize that is inconsistent
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	518 // with other command line flags, issue a warning.
0 a61af66fc99e Initial load duke parents: diff changeset	519 // The generation minimums and the overall heap mimimum should
a61af66fc99e Initial load duke parents: diff changeset	520 // be within one heap alignment.
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	521 if ((_min_gen1_size + _min_gen0_size + min_alignment()) <
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	522 min_heap_byte_size()) {
0 a61af66fc99e Initial load duke parents: diff changeset	523 warning("Inconsistency between minimum heap size and minimum "
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	524 "generation sizes: using minimum heap = " SIZE_FORMAT,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	525 min_heap_byte_size());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	526 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	527 if ((OldSize > _max_gen1_size)) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	528 warning("Inconsistency between maximum heap size and maximum "
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	529 "generation sizes: using maximum heap = " SIZE_FORMAT
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	530 " -XX:OldSize flag is being ignored",
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	531 max_heap_byte_size());
2368 dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	532 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	533 // If there is an inconsistency between the OldSize and the minimum and/or
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	534 // initial size of gen0, since OldSize was explicitly set, OldSize wins.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	535 if (adjust_gen0_sizes(&_min_gen0_size, &_min_gen1_size,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	536 min_heap_byte_size(), OldSize)) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	537 if (PrintGCDetails && Verbose) {
2368 dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	538 gclog_or_tty->print_cr("2: Minimum gen0 " SIZE_FORMAT " Initial gen0 "
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	539 SIZE_FORMAT " Maximum gen0 " SIZE_FORMAT,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	540 min_gen0_size(), initial_gen0_size(), max_gen0_size());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	541 }
0 a61af66fc99e Initial load duke parents: diff changeset	542 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	543 // Initial size
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	544 if (adjust_gen0_sizes(&_initial_gen0_size, &_initial_gen1_size,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	545 initial_heap_byte_size(), OldSize)) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	546 if (PrintGCDetails && Verbose) {
2368 dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	547 gclog_or_tty->print_cr("3: Minimum gen0 " SIZE_FORMAT " Initial gen0 "
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	548 SIZE_FORMAT " Maximum gen0 " SIZE_FORMAT,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	549 min_gen0_size(), initial_gen0_size(), max_gen0_size());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	550 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	551 }
0 a61af66fc99e Initial load duke parents: diff changeset	552 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	553 // Enforce the maximum gen1 size.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	554 set_min_gen1_size(MIN2(_min_gen1_size, _max_gen1_size));
0 a61af66fc99e Initial load duke parents: diff changeset	555
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	556 // Check that min gen1 <= initial gen1 <= max gen1
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	557 set_initial_gen1_size(MAX2(_initial_gen1_size, _min_gen1_size));
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	558 set_initial_gen1_size(MIN2(_initial_gen1_size, _max_gen1_size));
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	559
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	560 if (PrintGCDetails && Verbose) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	561 gclog_or_tty->print_cr("Minimum gen1 " SIZE_FORMAT " Initial gen1 "
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	562 SIZE_FORMAT " Maximum gen1 " SIZE_FORMAT,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	563 min_gen1_size(), initial_gen1_size(), max_gen1_size());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	564 }
0 a61af66fc99e Initial load duke parents: diff changeset	565 }
a61af66fc99e Initial load duke parents: diff changeset	566
a61af66fc99e Initial load duke parents: diff changeset	567 HeapWord* GenCollectorPolicy::mem_allocate_work(size_t size,
a61af66fc99e Initial load duke parents: diff changeset	568 bool is_tlab,
a61af66fc99e Initial load duke parents: diff changeset	569 bool* gc_overhead_limit_was_exceeded) {
a61af66fc99e Initial load duke parents: diff changeset	570 GenCollectedHeap *gch = GenCollectedHeap::heap();
a61af66fc99e Initial load duke parents: diff changeset	571
a61af66fc99e Initial load duke parents: diff changeset	572 debug_only(gch->check_for_valid_allocation_state());
a61af66fc99e Initial load duke parents: diff changeset	573 assert(gch->no_gc_in_progress(), "Allocation during gc not allowed");
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	574
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	575 // In general gc_overhead_limit_was_exceeded should be false so
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	576 // set it so here and reset it to true only if the gc time
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	577 // limit is being exceeded as checked below.
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	578 *gc_overhead_limit_was_exceeded = false;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	579
0 a61af66fc99e Initial load duke parents: diff changeset	580 HeapWord* result = NULL;
a61af66fc99e Initial load duke parents: diff changeset	581
a61af66fc99e Initial load duke parents: diff changeset	582 // Loop until the allocation is satisified,
a61af66fc99e Initial load duke parents: diff changeset	583 // or unsatisfied after GC.
8853 2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8743 diff changeset	584 for (int try_count = 1, gclocker_stalled_count = 0; /* return or throw */; try_count += 1) {
0 a61af66fc99e Initial load duke parents: diff changeset	585 HandleMark hm; // discard any handles allocated in each iteration
a61af66fc99e Initial load duke parents: diff changeset	586
a61af66fc99e Initial load duke parents: diff changeset	587 // First allocation attempt is lock-free.
a61af66fc99e Initial load duke parents: diff changeset	588 Generation *gen0 = gch->get_gen(0);
a61af66fc99e Initial load duke parents: diff changeset	589 assert(gen0->supports_inline_contig_alloc(),
a61af66fc99e Initial load duke parents: diff changeset	590 "Otherwise, must do alloc within heap lock");
a61af66fc99e Initial load duke parents: diff changeset	591 if (gen0->should_allocate(size, is_tlab)) {
a61af66fc99e Initial load duke parents: diff changeset	592 result = gen0->par_allocate(size, is_tlab);
a61af66fc99e Initial load duke parents: diff changeset	593 if (result != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	594 assert(gch->is_in_reserved(result), "result not in heap");
a61af66fc99e Initial load duke parents: diff changeset	595 return result;
a61af66fc99e Initial load duke parents: diff changeset	596 }
a61af66fc99e Initial load duke parents: diff changeset	597 }
a61af66fc99e Initial load duke parents: diff changeset	598 unsigned int gc_count_before; // read inside the Heap_lock locked region
a61af66fc99e Initial load duke parents: diff changeset	599 {
a61af66fc99e Initial load duke parents: diff changeset	600 MutexLocker ml(Heap_lock);
a61af66fc99e Initial load duke parents: diff changeset	601 if (PrintGC && Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	602 gclog_or_tty->print_cr("TwoGenerationCollectorPolicy::mem_allocate_work:"
a61af66fc99e Initial load duke parents: diff changeset	603 " attempting locked slow path allocation");
a61af66fc99e Initial load duke parents: diff changeset	604 }
a61af66fc99e Initial load duke parents: diff changeset	605 // Note that only large objects get a shot at being
a61af66fc99e Initial load duke parents: diff changeset	606 // allocated in later generations.
a61af66fc99e Initial load duke parents: diff changeset	607 bool first_only = ! should_try_older_generation_allocation(size);
a61af66fc99e Initial load duke parents: diff changeset	608
a61af66fc99e Initial load duke parents: diff changeset	609 result = gch->attempt_allocation(size, is_tlab, first_only);
a61af66fc99e Initial load duke parents: diff changeset	610 if (result != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	611 assert(gch->is_in_reserved(result), "result not in heap");
a61af66fc99e Initial load duke parents: diff changeset	612 return result;
a61af66fc99e Initial load duke parents: diff changeset	613 }
a61af66fc99e Initial load duke parents: diff changeset	614
a61af66fc99e Initial load duke parents: diff changeset	615 if (GC_locker::is_active_and_needs_gc()) {
a61af66fc99e Initial load duke parents: diff changeset	616 if (is_tlab) {
a61af66fc99e Initial load duke parents: diff changeset	617 return NULL; // Caller will retry allocating individual object
a61af66fc99e Initial load duke parents: diff changeset	618 }
a61af66fc99e Initial load duke parents: diff changeset	619 if (!gch->is_maximal_no_gc()) {
a61af66fc99e Initial load duke parents: diff changeset	620 // Try and expand heap to satisfy request
a61af66fc99e Initial load duke parents: diff changeset	621 result = expand_heap_and_allocate(size, is_tlab);
a61af66fc99e Initial load duke parents: diff changeset	622 // result could be null if we are out of space
a61af66fc99e Initial load duke parents: diff changeset	623 if (result != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	624 return result;
a61af66fc99e Initial load duke parents: diff changeset	625 }
a61af66fc99e Initial load duke parents: diff changeset	626 }
a61af66fc99e Initial load duke parents: diff changeset	627
8853 2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8743 diff changeset	628 if (gclocker_stalled_count > GCLockerRetryAllocationCount) {
2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8743 diff changeset	629 return NULL; // we didn't get to do a GC and we didn't get any memory
2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8743 diff changeset	630 }
2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8743 diff changeset	631
0 a61af66fc99e Initial load duke parents: diff changeset	632 // If this thread is not in a jni critical section, we stall
a61af66fc99e Initial load duke parents: diff changeset	633 // the requestor until the critical section has cleared and
a61af66fc99e Initial load duke parents: diff changeset	634 // GC allowed. When the critical section clears, a GC is
a61af66fc99e Initial load duke parents: diff changeset	635 // initiated by the last thread exiting the critical section; so
a61af66fc99e Initial load duke parents: diff changeset	636 // we retry the allocation sequence from the beginning of the loop,
a61af66fc99e Initial load duke parents: diff changeset	637 // rather than causing more, now probably unnecessary, GC attempts.
a61af66fc99e Initial load duke parents: diff changeset	638 JavaThread* jthr = JavaThread::current();
a61af66fc99e Initial load duke parents: diff changeset	639 if (!jthr->in_critical()) {
a61af66fc99e Initial load duke parents: diff changeset	640 MutexUnlocker mul(Heap_lock);
a61af66fc99e Initial load duke parents: diff changeset	641 // Wait for JNI critical section to be exited
a61af66fc99e Initial load duke parents: diff changeset	642 GC_locker::stall_until_clear();
8853 2e093b564241 7014552: gc/lock/jni/jnilockXXX works too slow on 1-processor machine mgerdin parents: 8743 diff changeset	643 gclocker_stalled_count += 1;
0 a61af66fc99e Initial load duke parents: diff changeset	644 continue;
a61af66fc99e Initial load duke parents: diff changeset	645 } else {
a61af66fc99e Initial load duke parents: diff changeset	646 if (CheckJNICalls) {
a61af66fc99e Initial load duke parents: diff changeset	647 fatal("Possible deadlock due to allocating while"
a61af66fc99e Initial load duke parents: diff changeset	648 " in jni critical section");
a61af66fc99e Initial load duke parents: diff changeset	649 }
a61af66fc99e Initial load duke parents: diff changeset	650 return NULL;
a61af66fc99e Initial load duke parents: diff changeset	651 }
a61af66fc99e Initial load duke parents: diff changeset	652 }
a61af66fc99e Initial load duke parents: diff changeset	653
a61af66fc99e Initial load duke parents: diff changeset	654 // Read the gc count while the heap lock is held.
a61af66fc99e Initial load duke parents: diff changeset	655 gc_count_before = Universe::heap()->total_collections();
a61af66fc99e Initial load duke parents: diff changeset	656 }
a61af66fc99e Initial load duke parents: diff changeset	657
a61af66fc99e Initial load duke parents: diff changeset	658 VM_GenCollectForAllocation op(size,
a61af66fc99e Initial load duke parents: diff changeset	659 is_tlab,
a61af66fc99e Initial load duke parents: diff changeset	660 gc_count_before);
a61af66fc99e Initial load duke parents: diff changeset	661 VMThread::execute(&op);
a61af66fc99e Initial load duke parents: diff changeset	662 if (op.prologue_succeeded()) {
a61af66fc99e Initial load duke parents: diff changeset	663 result = op.result();
a61af66fc99e Initial load duke parents: diff changeset	664 if (op.gc_locked()) {
a61af66fc99e Initial load duke parents: diff changeset	665 assert(result == NULL, "must be NULL if gc_locked() is true");
a61af66fc99e Initial load duke parents: diff changeset	666 continue; // retry and/or stall as necessary
a61af66fc99e Initial load duke parents: diff changeset	667 }
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	668
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	669 // Allocation has failed and a collection
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	670 // has been done. If the gc time limit was exceeded the
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	671 // this time, return NULL so that an out-of-memory
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	672 // will be thrown. Clear gc_overhead_limit_exceeded
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	673 // so that the overhead exceeded does not persist.
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	674
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	675 const bool limit_exceeded = size_policy()->gc_overhead_limit_exceeded();
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	676 const bool softrefs_clear = all_soft_refs_clear();
8743 82657b6a8cc0 6976528: PS: assert(!limit_exceeded \|\| softrefs_clear) failed: Should have been cleared jmasa parents: 8072 diff changeset	677
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	678 if (limit_exceeded && softrefs_clear) {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	679 *gc_overhead_limit_was_exceeded = true;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	680 size_policy()->set_gc_overhead_limit_exceeded(false);
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	681 if (op.result() != NULL) {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	682 CollectedHeap::fill_with_object(op.result(), size);
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	683 }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	684 return NULL;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	685 }
0 a61af66fc99e Initial load duke parents: diff changeset	686 assert(result == NULL \|\| gch->is_in_reserved(result),
a61af66fc99e Initial load duke parents: diff changeset	687 "result not in heap");
a61af66fc99e Initial load duke parents: diff changeset	688 return result;
a61af66fc99e Initial load duke parents: diff changeset	689 }
a61af66fc99e Initial load duke parents: diff changeset	690
a61af66fc99e Initial load duke parents: diff changeset	691 // Give a warning if we seem to be looping forever.
a61af66fc99e Initial load duke parents: diff changeset	692 if ((QueuedAllocationWarningCount > 0) &&
a61af66fc99e Initial load duke parents: diff changeset	693 (try_count % QueuedAllocationWarningCount == 0)) {
a61af66fc99e Initial load duke parents: diff changeset	694 warning("TwoGenerationCollectorPolicy::mem_allocate_work retries %d times \n\t"
a61af66fc99e Initial load duke parents: diff changeset	695 " size=%d %s", try_count, size, is_tlab ? "(TLAB)" : "");
a61af66fc99e Initial load duke parents: diff changeset	696 }
a61af66fc99e Initial load duke parents: diff changeset	697 }
a61af66fc99e Initial load duke parents: diff changeset	698 }
a61af66fc99e Initial load duke parents: diff changeset	699
a61af66fc99e Initial load duke parents: diff changeset	700 HeapWord* GenCollectorPolicy::expand_heap_and_allocate(size_t size,
a61af66fc99e Initial load duke parents: diff changeset	701 bool is_tlab) {
a61af66fc99e Initial load duke parents: diff changeset	702 GenCollectedHeap *gch = GenCollectedHeap::heap();
a61af66fc99e Initial load duke parents: diff changeset	703 HeapWord* result = NULL;
a61af66fc99e Initial load duke parents: diff changeset	704 for (int i = number_of_generations() - 1; i >= 0 && result == NULL; i--) {
a61af66fc99e Initial load duke parents: diff changeset	705 Generation *gen = gch->get_gen(i);
a61af66fc99e Initial load duke parents: diff changeset	706 if (gen->should_allocate(size, is_tlab)) {
a61af66fc99e Initial load duke parents: diff changeset	707 result = gen->expand_and_allocate(size, is_tlab);
a61af66fc99e Initial load duke parents: diff changeset	708 }
a61af66fc99e Initial load duke parents: diff changeset	709 }
a61af66fc99e Initial load duke parents: diff changeset	710 assert(result == NULL \|\| gch->is_in_reserved(result), "result not in heap");
a61af66fc99e Initial load duke parents: diff changeset	711 return result;
a61af66fc99e Initial load duke parents: diff changeset	712 }
a61af66fc99e Initial load duke parents: diff changeset	713
a61af66fc99e Initial load duke parents: diff changeset	714 HeapWord* GenCollectorPolicy::satisfy_failed_allocation(size_t size,
a61af66fc99e Initial load duke parents: diff changeset	715 bool is_tlab) {
a61af66fc99e Initial load duke parents: diff changeset	716 GenCollectedHeap *gch = GenCollectedHeap::heap();
a61af66fc99e Initial load duke parents: diff changeset	717 GCCauseSetter x(gch, GCCause::_allocation_failure);
a61af66fc99e Initial load duke parents: diff changeset	718 HeapWord* result = NULL;
a61af66fc99e Initial load duke parents: diff changeset	719
a61af66fc99e Initial load duke parents: diff changeset	720 assert(size != 0, "Precondition violated");
a61af66fc99e Initial load duke parents: diff changeset	721 if (GC_locker::is_active_and_needs_gc()) {
a61af66fc99e Initial load duke parents: diff changeset	722 // GC locker is active; instead of a collection we will attempt
a61af66fc99e Initial load duke parents: diff changeset	723 // to expand the heap, if there's room for expansion.
a61af66fc99e Initial load duke parents: diff changeset	724 if (!gch->is_maximal_no_gc()) {
a61af66fc99e Initial load duke parents: diff changeset	725 result = expand_heap_and_allocate(size, is_tlab);
a61af66fc99e Initial load duke parents: diff changeset	726 }
a61af66fc99e Initial load duke parents: diff changeset	727 return result; // could be null if we are out of space
1994 6cd6d394f280 7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot \|\| !gch->incremental_collection_failed()) ysr parents: 1972 diff changeset	728 } else if (!gch->incremental_collection_will_fail(false /* don't consult_young */)) {
0 a61af66fc99e Initial load duke parents: diff changeset	729 // Do an incremental collection.
a61af66fc99e Initial load duke parents: diff changeset	730 gch->do_collection(false /* full */,
a61af66fc99e Initial load duke parents: diff changeset	731 false /* clear_all_soft_refs */,
a61af66fc99e Initial load duke parents: diff changeset	732 size /* size */,
a61af66fc99e Initial load duke parents: diff changeset	733 is_tlab /* is_tlab */,
a61af66fc99e Initial load duke parents: diff changeset	734 number_of_generations() - 1 /* max_level */);
a61af66fc99e Initial load duke parents: diff changeset	735 } else {
1994 6cd6d394f280 7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot \|\| !gch->incremental_collection_failed()) ysr parents: 1972 diff changeset	736 if (Verbose && PrintGCDetails) {
6cd6d394f280 7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot \|\| !gch->incremental_collection_failed()) ysr parents: 1972 diff changeset	737 gclog_or_tty->print(" :: Trying full because partial may fail :: ");
6cd6d394f280 7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot \|\| !gch->incremental_collection_failed()) ysr parents: 1972 diff changeset	738 }
0 a61af66fc99e Initial load duke parents: diff changeset	739 // Try a full collection; see delta for bug id 6266275
a61af66fc99e Initial load duke parents: diff changeset	740 // for the original code and why this has been simplified
a61af66fc99e Initial load duke parents: diff changeset	741 // with from-space allocation criteria modified and
a61af66fc99e Initial load duke parents: diff changeset	742 // such allocation moved out of the safepoint path.
a61af66fc99e Initial load duke parents: diff changeset	743 gch->do_collection(true /* full */,
a61af66fc99e Initial load duke parents: diff changeset	744 false /* clear_all_soft_refs */,
a61af66fc99e Initial load duke parents: diff changeset	745 size /* size */,
a61af66fc99e Initial load duke parents: diff changeset	746 is_tlab /* is_tlab */,
a61af66fc99e Initial load duke parents: diff changeset	747 number_of_generations() - 1 /* max_level */);
a61af66fc99e Initial load duke parents: diff changeset	748 }
a61af66fc99e Initial load duke parents: diff changeset	749
a61af66fc99e Initial load duke parents: diff changeset	750 result = gch->attempt_allocation(size, is_tlab, false /first_only/);
a61af66fc99e Initial load duke parents: diff changeset	751
a61af66fc99e Initial load duke parents: diff changeset	752 if (result != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	753 assert(gch->is_in_reserved(result), "result not in heap");
a61af66fc99e Initial load duke parents: diff changeset	754 return result;
a61af66fc99e Initial load duke parents: diff changeset	755 }
a61af66fc99e Initial load duke parents: diff changeset	756
a61af66fc99e Initial load duke parents: diff changeset	757 // OK, collection failed, try expansion.
a61af66fc99e Initial load duke parents: diff changeset	758 result = expand_heap_and_allocate(size, is_tlab);
a61af66fc99e Initial load duke parents: diff changeset	759 if (result != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	760 return result;
a61af66fc99e Initial load duke parents: diff changeset	761 }
a61af66fc99e Initial load duke parents: diff changeset	762
a61af66fc99e Initial load duke parents: diff changeset	763 // If we reach this point, we're really out of memory. Try every trick
a61af66fc99e Initial load duke parents: diff changeset	764 // we can to reclaim memory. Force collection of soft references. Force
a61af66fc99e Initial load duke parents: diff changeset	765 // a complete compaction of the heap. Any additional methods for finding
a61af66fc99e Initial load duke parents: diff changeset	766 // free memory should be here, especially if they are expensive. If this
a61af66fc99e Initial load duke parents: diff changeset	767 // attempt fails, an OOM exception will be thrown.
a61af66fc99e Initial load duke parents: diff changeset	768 {
10287 12f651e29f6b 6843347: Boundary values in some public GC options cause crashes tschatzl parents: 10284 diff changeset	769 UIntFlagSetting flag_change(MarkSweepAlwaysCompactCount, 1); // Make sure the heap is fully compacted
0 a61af66fc99e Initial load duke parents: diff changeset	770
a61af66fc99e Initial load duke parents: diff changeset	771 gch->do_collection(true /* full */,
a61af66fc99e Initial load duke parents: diff changeset	772 true /* clear_all_soft_refs */,
a61af66fc99e Initial load duke parents: diff changeset	773 size /* size */,
a61af66fc99e Initial load duke parents: diff changeset	774 is_tlab /* is_tlab */,
a61af66fc99e Initial load duke parents: diff changeset	775 number_of_generations() - 1 /* max_level */);
a61af66fc99e Initial load duke parents: diff changeset	776 }
a61af66fc99e Initial load duke parents: diff changeset	777
a61af66fc99e Initial load duke parents: diff changeset	778 result = gch->attempt_allocation(size, is_tlab, false /* first_only */);
a61af66fc99e Initial load duke parents: diff changeset	779 if (result != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	780 assert(gch->is_in_reserved(result), "result not in heap");
a61af66fc99e Initial load duke parents: diff changeset	781 return result;
a61af66fc99e Initial load duke parents: diff changeset	782 }
a61af66fc99e Initial load duke parents: diff changeset	783
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	784 assert(!should_clear_all_soft_refs(),
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	785 "Flag should have been handled and cleared prior to this point");
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	786
0 a61af66fc99e Initial load duke parents: diff changeset	787 // What else? We might try synchronous finalization later. If the total
a61af66fc99e Initial load duke parents: diff changeset	788 // space available is large enough for the allocation, then a more
a61af66fc99e Initial load duke parents: diff changeset	789 // complete compaction phase than we've tried so far might be
a61af66fc99e Initial load duke parents: diff changeset	790 // appropriate.
a61af66fc99e Initial load duke parents: diff changeset	791 return NULL;
a61af66fc99e Initial load duke parents: diff changeset	792 }
a61af66fc99e Initial load duke parents: diff changeset	793
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	794 MetaWord* CollectorPolicy::satisfy_failed_metadata_allocation(
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	795 ClassLoaderData* loader_data,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	796 size_t word_size,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	797 Metaspace::MetadataType mdtype) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	798 uint loop_count = 0;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	799 uint gc_count = 0;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	800 uint full_gc_count = 0;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	801
6923 3fadc0e8cffe 8000988: VM deadlock when running btree006 on windows-i586 jmasa parents: 6753 diff changeset	802 assert(!Heap_lock->owned_by_self(), "Should not be holding the Heap_lock");
3fadc0e8cffe 8000988: VM deadlock when running btree006 on windows-i586 jmasa parents: 6753 diff changeset	803
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	804 do {
6753 8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	805 MetaWord* result = NULL;
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	806 if (GC_locker::is_active_and_needs_gc()) {
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	807 // If the GC_locker is active, just expand and allocate.
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	808 // If that does not succeed, wait if this thread is not
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	809 // in a critical section itself.
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	810 result =
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	811 loader_data->metaspace_non_null()->expand_and_allocate(word_size,
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	812 mdtype);
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	813 if (result != NULL) {
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	814 return result;
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	815 }
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	816 JavaThread* jthr = JavaThread::current();
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	817 if (!jthr->in_critical()) {
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	818 // Wait for JNI critical section to be exited
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	819 GC_locker::stall_until_clear();
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	820 // The GC invoked by the last thread leaving the critical
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	821 // section will be a young collection and a full collection
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	822 // is (currently) needed for unloading classes so continue
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	823 // to the next iteration to get a full GC.
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	824 continue;
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	825 } else {
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	826 if (CheckJNICalls) {
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	827 fatal("Possible deadlock due to allocating while"
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	828 " in jni critical section");
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	829 }
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	830 return NULL;
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	831 }
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	832 }
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	833
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	834 { // Need lock to get self consistent gc_count's
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	835 MutexLocker ml(Heap_lock);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	836 gc_count = Universe::heap()->total_collections();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	837 full_gc_count = Universe::heap()->total_full_collections();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	838 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	839
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	840 // Generate a VM operation
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	841 VM_CollectForMetadataAllocation op(loader_data,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	842 word_size,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	843 mdtype,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	844 gc_count,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	845 full_gc_count,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	846 GCCause::_metadata_GC_threshold);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	847 VMThread::execute(&op);
7446 e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	848
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	849 // If GC was locked out, try again. Check
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	850 // before checking success because the prologue
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	851 // could have succeeded and the GC still have
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	852 // been locked out.
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	853 if (op.gc_locked()) {
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	854 continue;
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	855 }
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	856
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	857 if (op.prologue_succeeded()) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	858 return op.result();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	859 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	860 loop_count++;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	861 if ((QueuedAllocationWarningCount > 0) &&
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	862 (loop_count % QueuedAllocationWarningCount == 0)) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	863 warning("satisfy_failed_metadata_allocation() retries %d times \n\t"
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	864 " size=%d", loop_count, word_size);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	865 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	866 } while (true); // Until a GC is done
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	867 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	868
0 a61af66fc99e Initial load duke parents: diff changeset	869 // Return true if any of the following is true:
a61af66fc99e Initial load duke parents: diff changeset	870 // . the allocation won't fit into the current young gen heap
a61af66fc99e Initial load duke parents: diff changeset	871 // . gc locker is occupied (jni critical section)
a61af66fc99e Initial load duke parents: diff changeset	872 // . heap memory is tight -- the most recent previous collection
a61af66fc99e Initial load duke parents: diff changeset	873 // was a full collection because a partial collection (would
a61af66fc99e Initial load duke parents: diff changeset	874 // have) failed and is likely to fail again
a61af66fc99e Initial load duke parents: diff changeset	875 bool GenCollectorPolicy::should_try_older_generation_allocation(
a61af66fc99e Initial load duke parents: diff changeset	876 size_t word_size) const {
a61af66fc99e Initial load duke parents: diff changeset	877 GenCollectedHeap* gch = GenCollectedHeap::heap();
a61af66fc99e Initial load duke parents: diff changeset	878 size_t gen0_capacity = gch->get_gen(0)->capacity_before_gc();
a61af66fc99e Initial load duke parents: diff changeset	879 return (word_size > heap_word_size(gen0_capacity))
1888 a7214d79fcf1 6896603: CMS/GCH: collection_attempt_is_safe() ergo should use more recent data ysr parents: 1795 diff changeset	880 \|\| GC_locker::is_active_and_needs_gc()
a7214d79fcf1 6896603: CMS/GCH: collection_attempt_is_safe() ergo should use more recent data ysr parents: 1795 diff changeset	881 \|\| gch->incremental_collection_failed();
0 a61af66fc99e Initial load duke parents: diff changeset	882 }
a61af66fc99e Initial load duke parents: diff changeset	883
a61af66fc99e Initial load duke parents: diff changeset	884
a61af66fc99e Initial load duke parents: diff changeset	885 //
a61af66fc99e Initial load duke parents: diff changeset	886 // MarkSweepPolicy methods
a61af66fc99e Initial load duke parents: diff changeset	887 //
a61af66fc99e Initial load duke parents: diff changeset	888
a61af66fc99e Initial load duke parents: diff changeset	889 MarkSweepPolicy::MarkSweepPolicy() {
a61af66fc99e Initial load duke parents: diff changeset	890 initialize_all();
a61af66fc99e Initial load duke parents: diff changeset	891 }
a61af66fc99e Initial load duke parents: diff changeset	892
a61af66fc99e Initial load duke parents: diff changeset	893 void MarkSweepPolicy::initialize_generations() {
10271 f9be75d21404 8012902: remove use of global operator new - take 2 minqi parents: 10241 diff changeset	894 _generations = NEW_C_HEAP_ARRAY3(GenerationSpecPtr, number_of_generations(), mtGC, 0, AllocFailStrategy::RETURN_NULL);
0 a61af66fc99e Initial load duke parents: diff changeset	895 if (_generations == NULL)
a61af66fc99e Initial load duke parents: diff changeset	896 vm_exit_during_initialization("Unable to allocate gen spec");
a61af66fc99e Initial load duke parents: diff changeset	897
7451 ca0a78017dc7 8005396: Use ParNew with only one thread instead of DefNew as default for CMS on single CPU machines brutisso parents: 7446 diff changeset	898 if (UseParNewGC) {
0 a61af66fc99e Initial load duke parents: diff changeset	899 _generations[0] = new GenerationSpec(Generation::ParNew, _initial_gen0_size, _max_gen0_size);
a61af66fc99e Initial load duke parents: diff changeset	900 } else {
a61af66fc99e Initial load duke parents: diff changeset	901 _generations[0] = new GenerationSpec(Generation::DefNew, _initial_gen0_size, _max_gen0_size);
a61af66fc99e Initial load duke parents: diff changeset	902 }
a61af66fc99e Initial load duke parents: diff changeset	903 _generations[1] = new GenerationSpec(Generation::MarkSweepCompact, _initial_gen1_size, _max_gen1_size);
a61af66fc99e Initial load duke parents: diff changeset	904
a61af66fc99e Initial load duke parents: diff changeset	905 if (_generations[0] == NULL \|\| _generations[1] == NULL)
a61af66fc99e Initial load duke parents: diff changeset	906 vm_exit_during_initialization("Unable to allocate gen spec");
a61af66fc99e Initial load duke parents: diff changeset	907 }
a61af66fc99e Initial load duke parents: diff changeset	908
a61af66fc99e Initial load duke parents: diff changeset	909 void MarkSweepPolicy::initialize_gc_policy_counters() {
a61af66fc99e Initial load duke parents: diff changeset	910 // initialize the policy counters - 2 collectors, 3 generations
7451 ca0a78017dc7 8005396: Use ParNew with only one thread instead of DefNew as default for CMS on single CPU machines brutisso parents: 7446 diff changeset	911 if (UseParNewGC) {
0 a61af66fc99e Initial load duke parents: diff changeset	912 _gc_policy_counters = new GCPolicyCounters("ParNew:MSC", 2, 3);
7451 ca0a78017dc7 8005396: Use ParNew with only one thread instead of DefNew as default for CMS on single CPU machines brutisso parents: 7446 diff changeset	913 } else {
0 a61af66fc99e Initial load duke parents: diff changeset	914 _gc_policy_counters = new GCPolicyCounters("Copy:MSC", 2, 3);
a61af66fc99e Initial load duke parents: diff changeset	915 }
a61af66fc99e Initial load duke parents: diff changeset	916 }

Mercurial > hg > truffle

annotate src/share/vm/memory/collectorPolicy.cpp @ 12238:9e11762cee52