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

annotate src/share/vm/memory/collectorPolicy.cpp @ 8001:db9981fd3124

8005915: Unify SERIALGC and INCLUDE_ALTERNATE_GCS Summary: Rename INCLUDE_ALTERNATE_GCS to INCLUDE_ALL_GCS and replace SERIALGC with INCLUDE_ALL_GCS. Reviewed-by: coleenp, stefank

author	jprovino
date	Wed, 23 Jan 2013 13:02:39 -0500
parents	ca0a78017dc7
children	1135141fb97e

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	2 * Copyright (c) 2001, 2012, 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
a61af66fc99e Initial load duke parents: diff changeset	50 void CollectorPolicy::initialize_flags() {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	51 if (MetaspaceSize > MaxMetaspaceSize) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	52 MaxMetaspaceSize = MetaspaceSize;
0 a61af66fc99e Initial load duke parents: diff changeset	53 }
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	54 MetaspaceSize = MAX2(min_alignment(), align_size_down_(MetaspaceSize, min_alignment()));
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	55 // Don't increase Metaspace size limit above specified.
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	56 MaxMetaspaceSize = align_size_down(MaxMetaspaceSize, max_alignment());
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	57 if (MetaspaceSize > MaxMetaspaceSize) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	58 MetaspaceSize = MaxMetaspaceSize;
1795 a8b66e00933b 6984368: Large default heap size does not allow to use zero based compressed oops kvn parents: 1552 diff changeset	59 }
0 a61af66fc99e Initial load duke parents: diff changeset	60
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	61 MinMetaspaceExpansion = MAX2(min_alignment(), align_size_down_(MinMetaspaceExpansion, min_alignment()));
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	62 MaxMetaspaceExpansion = MAX2(min_alignment(), align_size_down_(MaxMetaspaceExpansion, min_alignment()));
0 a61af66fc99e Initial load duke parents: diff changeset	63
a61af66fc99e Initial load duke parents: diff changeset	64 MinHeapDeltaBytes = align_size_up(MinHeapDeltaBytes, min_alignment());
a61af66fc99e Initial load duke parents: diff changeset	65
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	66 assert(MetaspaceSize % min_alignment() == 0, "metapace alignment");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	67 assert(MaxMetaspaceSize % max_alignment() == 0, "maximum metaspace alignment");
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	68 if (MetaspaceSize < 256*K) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	69 vm_exit_during_initialization("Too small initial Metaspace size");
0 a61af66fc99e Initial load duke parents: diff changeset	70 }
a61af66fc99e Initial load duke parents: diff changeset	71 }
a61af66fc99e Initial load duke parents: diff changeset	72
a61af66fc99e Initial load duke parents: diff changeset	73 void CollectorPolicy::initialize_size_info() {
a61af66fc99e Initial load duke parents: diff changeset	74 // User inputs from -mx and ms are aligned
1064 473cce303f13 6887571: Increase default heap config sizes phh parents: 356 diff changeset	75 set_initial_heap_byte_size(InitialHeapSize);
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	76 if (initial_heap_byte_size() == 0) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	77 set_initial_heap_byte_size(NewSize + OldSize);
0 a61af66fc99e Initial load duke parents: diff changeset	78 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	79 set_initial_heap_byte_size(align_size_up(_initial_heap_byte_size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	80 min_alignment()));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	81
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	82 set_min_heap_byte_size(Arguments::min_heap_size());
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	83 if (min_heap_byte_size() == 0) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	84 set_min_heap_byte_size(NewSize + OldSize);
0 a61af66fc99e Initial load duke parents: diff changeset	85 }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	86 set_min_heap_byte_size(align_size_up(_min_heap_byte_size,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	87 min_alignment()));
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	88
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	89 set_max_heap_byte_size(align_size_up(MaxHeapSize, max_alignment()));
0 a61af66fc99e Initial load duke parents: diff changeset	90
a61af66fc99e Initial load duke parents: diff changeset	91 // Check heap parameter properties
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	92 if (initial_heap_byte_size() < M) {
0 a61af66fc99e Initial load duke parents: diff changeset	93 vm_exit_during_initialization("Too small initial heap");
a61af66fc99e Initial load duke parents: diff changeset	94 }
a61af66fc99e Initial load duke parents: diff changeset	95 // Check heap parameter properties
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	96 if (min_heap_byte_size() < M) {
0 a61af66fc99e Initial load duke parents: diff changeset	97 vm_exit_during_initialization("Too small minimum heap");
a61af66fc99e Initial load duke parents: diff changeset	98 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	99 if (initial_heap_byte_size() <= NewSize) {
0 a61af66fc99e Initial load duke parents: diff changeset	100 // make sure there is at least some room in old space
a61af66fc99e Initial load duke parents: diff changeset	101 vm_exit_during_initialization("Too small initial heap for new size specified");
a61af66fc99e Initial load duke parents: diff changeset	102 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	103 if (max_heap_byte_size() < min_heap_byte_size()) {
0 a61af66fc99e Initial load duke parents: diff changeset	104 vm_exit_during_initialization("Incompatible minimum and maximum heap sizes specified");
a61af66fc99e Initial load duke parents: diff changeset	105 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	106 if (initial_heap_byte_size() < min_heap_byte_size()) {
0 a61af66fc99e Initial load duke parents: diff changeset	107 vm_exit_during_initialization("Incompatible minimum and initial heap sizes specified");
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 (max_heap_byte_size() < initial_heap_byte_size()) {
0 a61af66fc99e Initial load duke parents: diff changeset	110 vm_exit_during_initialization("Incompatible initial and maximum heap sizes specified");
a61af66fc99e Initial load duke parents: diff changeset	111 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	112
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	113 if (PrintGCDetails && Verbose) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	114 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	115 SIZE_FORMAT " Maximum heap " SIZE_FORMAT,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	116 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	117 }
0 a61af66fc99e Initial load duke parents: diff changeset	118 }
a61af66fc99e Initial load duke parents: diff changeset	119
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	120 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	121 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	122 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	123 return result;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	124 }
0 a61af66fc99e Initial load duke parents: diff changeset	125
a61af66fc99e Initial load duke parents: diff changeset	126 GenRemSet* CollectorPolicy::create_rem_set(MemRegion whole_heap,
a61af66fc99e Initial load duke parents: diff changeset	127 int max_covered_regions) {
a61af66fc99e Initial load duke parents: diff changeset	128 switch (rem_set_name()) {
a61af66fc99e Initial load duke parents: diff changeset	129 case GenRemSet::CardTable: {
a61af66fc99e Initial load duke parents: diff changeset	130 CardTableRS* res = new CardTableRS(whole_heap, max_covered_regions);
a61af66fc99e Initial load duke parents: diff changeset	131 return res;
a61af66fc99e Initial load duke parents: diff changeset	132 }
a61af66fc99e Initial load duke parents: diff changeset	133 default:
a61af66fc99e Initial load duke parents: diff changeset	134 guarantee(false, "unrecognized GenRemSet::Name");
a61af66fc99e Initial load duke parents: diff changeset	135 return NULL;
a61af66fc99e Initial load duke parents: diff changeset	136 }
a61af66fc99e Initial load duke parents: diff changeset	137 }
a61af66fc99e Initial load duke parents: diff changeset	138
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	139 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	140 // 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	141 // 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	142 // 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	143 if (size_policy() != NULL) {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	144 _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	145 }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	146 _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	147 }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	148
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	149
0 a61af66fc99e Initial load duke parents: diff changeset	150 // GenCollectorPolicy methods.
a61af66fc99e Initial load duke parents: diff changeset	151
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	152 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	153 size_t x = base_size / (NewRatio+1);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	154 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	155 align_size_down(x, min_alignment()) :
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	156 min_alignment();
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	157 return new_gen_size;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	158 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	159
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	160 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	161 size_t maximum_size) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	162 size_t alignment = min_alignment();
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	163 size_t max_minus = maximum_size - alignment;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	164 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	165 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	166
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	167
0 a61af66fc99e Initial load duke parents: diff changeset	168 void GenCollectorPolicy::initialize_size_policy(size_t init_eden_size,
a61af66fc99e Initial load duke parents: diff changeset	169 size_t init_promo_size,
a61af66fc99e Initial load duke parents: diff changeset	170 size_t init_survivor_size) {
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	171 const double max_gc_minor_pause_sec = ((double) MaxGCMinorPauseMillis)/1000.0;
0 a61af66fc99e Initial load duke parents: diff changeset	172 _size_policy = new AdaptiveSizePolicy(init_eden_size,
a61af66fc99e Initial load duke parents: diff changeset	173 init_promo_size,
a61af66fc99e Initial load duke parents: diff changeset	174 init_survivor_size,
a61af66fc99e Initial load duke parents: diff changeset	175 max_gc_minor_pause_sec,
a61af66fc99e Initial load duke parents: diff changeset	176 GCTimeRatio);
a61af66fc99e Initial load duke parents: diff changeset	177 }
a61af66fc99e Initial load duke parents: diff changeset	178
a61af66fc99e Initial load duke parents: diff changeset	179 size_t GenCollectorPolicy::compute_max_alignment() {
a61af66fc99e Initial load duke parents: diff changeset	180 // The card marking array and the offset arrays for old generations are
a61af66fc99e Initial load duke parents: diff changeset	181 // committed in os pages as well. Make sure they are entirely full (to
a61af66fc99e Initial load duke parents: diff changeset	182 // avoid partial page problems), e.g. if 512 bytes heap corresponds to 1
a61af66fc99e Initial load duke parents: diff changeset	183 // byte entry and the os page size is 4096, the maximum heap size should
a61af66fc99e Initial load duke parents: diff changeset	184 // be 512*4096 = 2MB aligned.
a61af66fc99e Initial load duke parents: diff changeset	185 size_t alignment = GenRemSet::max_alignment_constraint(rem_set_name());
a61af66fc99e Initial load duke parents: diff changeset	186
a61af66fc99e Initial load duke parents: diff changeset	187 // Parallel GC does its own alignment of the generations to avoid requiring a
a61af66fc99e Initial load duke parents: diff changeset	188 // large page (256M on some platforms) for the permanent generation. The
a61af66fc99e Initial load duke parents: diff changeset	189 // other collectors should also be updated to do their own alignment and then
a61af66fc99e Initial load duke parents: diff changeset	190 // this use of lcm() should be removed.
a61af66fc99e Initial load duke parents: diff changeset	191 if (UseLargePages && !UseParallelGC) {
a61af66fc99e Initial load duke parents: diff changeset	192 // in presence of large pages we have to make sure that our
a61af66fc99e Initial load duke parents: diff changeset	193 // alignment is large page aware
a61af66fc99e Initial load duke parents: diff changeset	194 alignment = lcm(os::large_page_size(), alignment);
a61af66fc99e Initial load duke parents: diff changeset	195 }
a61af66fc99e Initial load duke parents: diff changeset	196
a61af66fc99e Initial load duke parents: diff changeset	197 return alignment;
a61af66fc99e Initial load duke parents: diff changeset	198 }
a61af66fc99e Initial load duke parents: diff changeset	199
a61af66fc99e Initial load duke parents: diff changeset	200 void GenCollectorPolicy::initialize_flags() {
a61af66fc99e Initial load duke parents: diff changeset	201 // All sizes must be multiples of the generation granularity.
a61af66fc99e Initial load duke parents: diff changeset	202 set_min_alignment((uintx) Generation::GenGrain);
a61af66fc99e Initial load duke parents: diff changeset	203 set_max_alignment(compute_max_alignment());
a61af66fc99e Initial load duke parents: diff changeset	204 assert(max_alignment() >= min_alignment() &&
a61af66fc99e Initial load duke parents: diff changeset	205 max_alignment() % min_alignment() == 0,
a61af66fc99e Initial load duke parents: diff changeset	206 "invalid alignment constraints");
a61af66fc99e Initial load duke parents: diff changeset	207
a61af66fc99e Initial load duke parents: diff changeset	208 CollectorPolicy::initialize_flags();
a61af66fc99e Initial load duke parents: diff changeset	209
a61af66fc99e Initial load duke parents: diff changeset	210 // All generational heaps have a youngest gen; handle those flags here.
a61af66fc99e Initial load duke parents: diff changeset	211
a61af66fc99e Initial load duke parents: diff changeset	212 // Adjust max size parameters
a61af66fc99e Initial load duke parents: diff changeset	213 if (NewSize > MaxNewSize) {
a61af66fc99e Initial load duke parents: diff changeset	214 MaxNewSize = NewSize;
a61af66fc99e Initial load duke parents: diff changeset	215 }
a61af66fc99e Initial load duke parents: diff changeset	216 NewSize = align_size_down(NewSize, min_alignment());
a61af66fc99e Initial load duke parents: diff changeset	217 MaxNewSize = align_size_down(MaxNewSize, min_alignment());
a61af66fc99e Initial load duke parents: diff changeset	218
a61af66fc99e Initial load duke parents: diff changeset	219 // Check validity of heap flags
a61af66fc99e Initial load duke parents: diff changeset	220 assert(NewSize % min_alignment() == 0, "eden space alignment");
a61af66fc99e Initial load duke parents: diff changeset	221 assert(MaxNewSize % min_alignment() == 0, "survivor space alignment");
a61af66fc99e Initial load duke parents: diff changeset	222
a61af66fc99e Initial load duke parents: diff changeset	223 if (NewSize < 3*min_alignment()) {
a61af66fc99e Initial load duke parents: diff changeset	224 // make sure there room for eden and two survivor spaces
a61af66fc99e Initial load duke parents: diff changeset	225 vm_exit_during_initialization("Too small new size specified");
a61af66fc99e Initial load duke parents: diff changeset	226 }
a61af66fc99e Initial load duke parents: diff changeset	227 if (SurvivorRatio < 1 \|\| NewRatio < 1) {
a61af66fc99e Initial load duke parents: diff changeset	228 vm_exit_during_initialization("Invalid heap ratio specified");
a61af66fc99e Initial load duke parents: diff changeset	229 }
a61af66fc99e Initial load duke parents: diff changeset	230 }
a61af66fc99e Initial load duke parents: diff changeset	231
a61af66fc99e Initial load duke parents: diff changeset	232 void TwoGenerationCollectorPolicy::initialize_flags() {
a61af66fc99e Initial load duke parents: diff changeset	233 GenCollectorPolicy::initialize_flags();
a61af66fc99e Initial load duke parents: diff changeset	234
a61af66fc99e Initial load duke parents: diff changeset	235 OldSize = align_size_down(OldSize, min_alignment());
a61af66fc99e Initial load duke parents: diff changeset	236 if (NewSize + OldSize > MaxHeapSize) {
a61af66fc99e Initial load duke parents: diff changeset	237 MaxHeapSize = NewSize + OldSize;
a61af66fc99e Initial load duke parents: diff changeset	238 }
a61af66fc99e Initial load duke parents: diff changeset	239 MaxHeapSize = align_size_up(MaxHeapSize, max_alignment());
a61af66fc99e Initial load duke parents: diff changeset	240
a61af66fc99e Initial load duke parents: diff changeset	241 always_do_update_barrier = UseConcMarkSweepGC;
a61af66fc99e Initial load duke parents: diff changeset	242
a61af66fc99e Initial load duke parents: diff changeset	243 // Check validity of heap flags
a61af66fc99e Initial load duke parents: diff changeset	244 assert(OldSize % min_alignment() == 0, "old space alignment");
a61af66fc99e Initial load duke parents: diff changeset	245 assert(MaxHeapSize % max_alignment() == 0, "maximum heap alignment");
a61af66fc99e Initial load duke parents: diff changeset	246 }
a61af66fc99e Initial load duke parents: diff changeset	247
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	248 // 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	249 // set command line parameters.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	250 // 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	251 // 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	252 // 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	253 // 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	254 // themselves and with overall heap sizings.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	255 // 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	256 // such as the use of NewRatio are used to size the generation.
0 a61af66fc99e Initial load duke parents: diff changeset	257 void GenCollectorPolicy::initialize_size_info() {
a61af66fc99e Initial load duke parents: diff changeset	258 CollectorPolicy::initialize_size_info();
a61af66fc99e Initial load duke parents: diff changeset	259
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	260 // 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	261 // 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	262 // 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	263 // generations sizes.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	264
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	265 // Determine maximum size of gen0
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	266
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	267 size_t max_new_size = 0;
2368 dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	268 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	269 if (MaxNewSize < min_alignment()) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	270 max_new_size = min_alignment();
2368 dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	271 }
dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	272 if (MaxNewSize >= max_heap_byte_size()) {
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	273 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	274 min_alignment());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	275 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	276 "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	277 "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	278 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	279 } else {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	280 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	281 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	282
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	283 // 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	284 // 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	285 // 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	286 // 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	287 // 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	288 // 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	289 // 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	290 // 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	291 // 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	292 // 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	293 // 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	294 // 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	295 // 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	296 // not always "wise".
0 a61af66fc99e Initial load duke parents: diff changeset	297 } else {
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	298 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	299 // Bound the maximum size by NewSize below (since it historically
0 a61af66fc99e Initial load duke parents: diff changeset	300 // would have been NewSize and because the NewRatio calculation could
a61af66fc99e Initial load duke parents: diff changeset	301 // 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	302 // 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	303 // NewSize and MaxNewSize.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	304 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	305 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	306 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	307
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	308 // 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	309 // minimum gen0 sizes.
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	310
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	311 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	312 // 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	313 // 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	314 // same as its maximum.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	315 set_min_gen0_size(max_new_size);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	316 set_initial_gen0_size(max_new_size);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	317 set_max_gen0_size(max_new_size);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	318 } else {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	319 size_t desired_new_size = 0;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	320 if (!FLAG_IS_DEFAULT(NewSize)) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	321 // 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	322 // 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	323 // 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	324 // 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	325 // 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	326 // 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	327 // 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	328 // generally small compared to the NewRatio calculation.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	329 _min_gen0_size = NewSize;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	330 desired_new_size = NewSize;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	331 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	332 } else {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	333 // 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	334 // 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	335 // 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	336 // 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	337 // small.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	338 _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	339 NewSize);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	340 desired_new_size =
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	341 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	342 NewSize);
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
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	345 assert(_min_gen0_size > 0, "Sanity check");
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	346 set_initial_gen0_size(desired_new_size);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	347 set_max_gen0_size(max_new_size);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	348
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	349 // 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	350 // determined without regard to the maximum sizes.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	351
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	352 // 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	353 set_min_gen0_size(
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	354 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	355 set_initial_gen0_size(
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	356 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	357 set_max_gen0_size(
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	358 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	359
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	360 // 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	361 // maximum sizes but have not been checked for consistency
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: 13 diff changeset	362 // among the three.
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	363
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	364 // Final check min <= initial <= max
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	365 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	366 set_initial_gen0_size(
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	367 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	368 set_min_gen0_size(MIN2(_min_gen0_size, _initial_gen0_size));
0 a61af66fc99e Initial load duke parents: diff changeset	369 }
a61af66fc99e Initial load duke parents: diff changeset	370
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	371 if (PrintGCDetails && Verbose) {
2368 dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	372 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	373 SIZE_FORMAT " Maximum gen0 " SIZE_FORMAT,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	374 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	375 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	376 }
0 a61af66fc99e Initial load duke parents: diff changeset	377
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	378 // 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	379 // 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	380 // 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	381 // 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	382 // 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	383 // 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	384 // 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	385 // 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	386 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	387 size_t* gen1_size_ptr,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	388 size_t heap_size,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	389 size_t min_gen0_size) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	390 bool result = false;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	391 if ((gen1_size_ptr + gen0_size_ptr) > heap_size) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	392 if (((*gen0_size_ptr + OldSize) > heap_size) &&
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	393 (heap_size - min_gen0_size) >= min_alignment()) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	394 // Adjust gen0 down to accomodate OldSize
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	395 *gen0_size_ptr = heap_size - min_gen0_size;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	396 *gen0_size_ptr =
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	397 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	398 min_alignment());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	399 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	400 result = true;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	401 } else {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	402 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	403 *gen1_size_ptr =
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	404 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	405 min_alignment());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	406 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	407 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	408 return result;
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	409 }
0 a61af66fc99e Initial load duke parents: diff changeset	410
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	411 // 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	412 // 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	413 // 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	414 // 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	415 // 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	416 // but allow the values to pass.
0 a61af66fc99e Initial load duke parents: diff changeset	417
a61af66fc99e Initial load duke parents: diff changeset	418 void TwoGenerationCollectorPolicy::initialize_size_info() {
a61af66fc99e Initial load duke parents: diff changeset	419 GenCollectorPolicy::initialize_size_info();
a61af66fc99e Initial load duke parents: diff changeset	420
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	421 // 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	422 // 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	423 // 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	424 // 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	425 // for setting the gen1 maximum.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	426 _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	427 _max_gen1_size =
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	428 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	429 min_alignment());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	430 // 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	431 // 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	432 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	433 // 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	434 // 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	435 // 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	436 // the minimum, maximum and initial sizes consistent
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	437 // 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	438 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	439 "gen0 has an unexpected minimum size");
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	440 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	441 set_min_gen1_size(
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	442 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	443 min_alignment()));
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	444 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	445 set_initial_gen1_size(
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	446 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	447 min_alignment()));
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	448
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	449 } else {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	450 // 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	451 // OldSize and then determine the consequences.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	452 set_min_gen1_size(OldSize);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	453 set_initial_gen1_size(OldSize);
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	454
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	455 // 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	456 // with other command line flags, issue a warning.
0 a61af66fc99e Initial load duke parents: diff changeset	457 // The generation minimums and the overall heap mimimum should
a61af66fc99e Initial load duke parents: diff changeset	458 // be within one heap alignment.
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	459 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	460 min_heap_byte_size()) {
0 a61af66fc99e Initial load duke parents: diff changeset	461 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	462 "generation sizes: using minimum heap = " SIZE_FORMAT,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	463 min_heap_byte_size());
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	464 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	465 if ((OldSize > _max_gen1_size)) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	466 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	467 "generation sizes: using maximum heap = " SIZE_FORMAT
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	468 " -XX:OldSize flag is being ignored",
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	469 max_heap_byte_size());
2368 dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	470 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	471 // 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	472 // 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	473 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	474 min_heap_byte_size(), OldSize)) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	475 if (PrintGCDetails && Verbose) {
2368 dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	476 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	477 SIZE_FORMAT " Maximum gen0 " SIZE_FORMAT,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	478 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	479 }
0 a61af66fc99e Initial load duke parents: diff changeset	480 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	481 // Initial size
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	482 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	483 initial_heap_byte_size(), OldSize)) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	484 if (PrintGCDetails && Verbose) {
2368 dde920245681 6896099: Integrate CMS heap ergo with default heap sizing ergo ysr parents: 1994 diff changeset	485 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	486 SIZE_FORMAT " Maximum gen0 " SIZE_FORMAT,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	487 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	488 }
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	489 }
0 a61af66fc99e Initial load duke parents: diff changeset	490 }
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	491 // Enforce the maximum gen1 size.
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	492 set_min_gen1_size(MIN2(_min_gen1_size, _max_gen1_size));
0 a61af66fc99e Initial load duke parents: diff changeset	493
13 183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	494 // 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	495 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	496 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	497
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	498 if (PrintGCDetails && Verbose) {
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	499 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	500 SIZE_FORMAT " Maximum gen1 " SIZE_FORMAT,
183f41cf8bfe 6557851: CMS: ergonomics defaults are not set with FLAG_SET_ERGO jmasa parents: 0 diff changeset	501 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	502 }
0 a61af66fc99e Initial load duke parents: diff changeset	503 }
a61af66fc99e Initial load duke parents: diff changeset	504
a61af66fc99e Initial load duke parents: diff changeset	505 HeapWord* GenCollectorPolicy::mem_allocate_work(size_t size,
a61af66fc99e Initial load duke parents: diff changeset	506 bool is_tlab,
a61af66fc99e Initial load duke parents: diff changeset	507 bool* gc_overhead_limit_was_exceeded) {
a61af66fc99e Initial load duke parents: diff changeset	508 GenCollectedHeap *gch = GenCollectedHeap::heap();
a61af66fc99e Initial load duke parents: diff changeset	509
a61af66fc99e Initial load duke parents: diff changeset	510 debug_only(gch->check_for_valid_allocation_state());
a61af66fc99e Initial load duke parents: diff changeset	511 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	512
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	513 // 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	514 // 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	515 // 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	516 *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	517
0 a61af66fc99e Initial load duke parents: diff changeset	518 HeapWord* result = NULL;
a61af66fc99e Initial load duke parents: diff changeset	519
a61af66fc99e Initial load duke parents: diff changeset	520 // Loop until the allocation is satisified,
a61af66fc99e Initial load duke parents: diff changeset	521 // or unsatisfied after GC.
a61af66fc99e Initial load duke parents: diff changeset	522 for (int try_count = 1; /* return or throw */; try_count += 1) {
a61af66fc99e Initial load duke parents: diff changeset	523 HandleMark hm; // discard any handles allocated in each iteration
a61af66fc99e Initial load duke parents: diff changeset	524
a61af66fc99e Initial load duke parents: diff changeset	525 // First allocation attempt is lock-free.
a61af66fc99e Initial load duke parents: diff changeset	526 Generation *gen0 = gch->get_gen(0);
a61af66fc99e Initial load duke parents: diff changeset	527 assert(gen0->supports_inline_contig_alloc(),
a61af66fc99e Initial load duke parents: diff changeset	528 "Otherwise, must do alloc within heap lock");
a61af66fc99e Initial load duke parents: diff changeset	529 if (gen0->should_allocate(size, is_tlab)) {
a61af66fc99e Initial load duke parents: diff changeset	530 result = gen0->par_allocate(size, is_tlab);
a61af66fc99e Initial load duke parents: diff changeset	531 if (result != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	532 assert(gch->is_in_reserved(result), "result not in heap");
a61af66fc99e Initial load duke parents: diff changeset	533 return result;
a61af66fc99e Initial load duke parents: diff changeset	534 }
a61af66fc99e Initial load duke parents: diff changeset	535 }
a61af66fc99e Initial load duke parents: diff changeset	536 unsigned int gc_count_before; // read inside the Heap_lock locked region
a61af66fc99e Initial load duke parents: diff changeset	537 {
a61af66fc99e Initial load duke parents: diff changeset	538 MutexLocker ml(Heap_lock);
a61af66fc99e Initial load duke parents: diff changeset	539 if (PrintGC && Verbose) {
a61af66fc99e Initial load duke parents: diff changeset	540 gclog_or_tty->print_cr("TwoGenerationCollectorPolicy::mem_allocate_work:"
a61af66fc99e Initial load duke parents: diff changeset	541 " attempting locked slow path allocation");
a61af66fc99e Initial load duke parents: diff changeset	542 }
a61af66fc99e Initial load duke parents: diff changeset	543 // Note that only large objects get a shot at being
a61af66fc99e Initial load duke parents: diff changeset	544 // allocated in later generations.
a61af66fc99e Initial load duke parents: diff changeset	545 bool first_only = ! should_try_older_generation_allocation(size);
a61af66fc99e Initial load duke parents: diff changeset	546
a61af66fc99e Initial load duke parents: diff changeset	547 result = gch->attempt_allocation(size, is_tlab, first_only);
a61af66fc99e Initial load duke parents: diff changeset	548 if (result != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	549 assert(gch->is_in_reserved(result), "result not in heap");
a61af66fc99e Initial load duke parents: diff changeset	550 return result;
a61af66fc99e Initial load duke parents: diff changeset	551 }
a61af66fc99e Initial load duke parents: diff changeset	552
a61af66fc99e Initial load duke parents: diff changeset	553 if (GC_locker::is_active_and_needs_gc()) {
a61af66fc99e Initial load duke parents: diff changeset	554 if (is_tlab) {
a61af66fc99e Initial load duke parents: diff changeset	555 return NULL; // Caller will retry allocating individual object
a61af66fc99e Initial load duke parents: diff changeset	556 }
a61af66fc99e Initial load duke parents: diff changeset	557 if (!gch->is_maximal_no_gc()) {
a61af66fc99e Initial load duke parents: diff changeset	558 // Try and expand heap to satisfy request
a61af66fc99e Initial load duke parents: diff changeset	559 result = expand_heap_and_allocate(size, is_tlab);
a61af66fc99e Initial load duke parents: diff changeset	560 // result could be null if we are out of space
a61af66fc99e Initial load duke parents: diff changeset	561 if (result != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	562 return result;
a61af66fc99e Initial load duke parents: diff changeset	563 }
a61af66fc99e Initial load duke parents: diff changeset	564 }
a61af66fc99e Initial load duke parents: diff changeset	565
a61af66fc99e Initial load duke parents: diff changeset	566 // If this thread is not in a jni critical section, we stall
a61af66fc99e Initial load duke parents: diff changeset	567 // the requestor until the critical section has cleared and
a61af66fc99e Initial load duke parents: diff changeset	568 // GC allowed. When the critical section clears, a GC is
a61af66fc99e Initial load duke parents: diff changeset	569 // initiated by the last thread exiting the critical section; so
a61af66fc99e Initial load duke parents: diff changeset	570 // we retry the allocation sequence from the beginning of the loop,
a61af66fc99e Initial load duke parents: diff changeset	571 // rather than causing more, now probably unnecessary, GC attempts.
a61af66fc99e Initial load duke parents: diff changeset	572 JavaThread* jthr = JavaThread::current();
a61af66fc99e Initial load duke parents: diff changeset	573 if (!jthr->in_critical()) {
a61af66fc99e Initial load duke parents: diff changeset	574 MutexUnlocker mul(Heap_lock);
a61af66fc99e Initial load duke parents: diff changeset	575 // Wait for JNI critical section to be exited
a61af66fc99e Initial load duke parents: diff changeset	576 GC_locker::stall_until_clear();
a61af66fc99e Initial load duke parents: diff changeset	577 continue;
a61af66fc99e Initial load duke parents: diff changeset	578 } else {
a61af66fc99e Initial load duke parents: diff changeset	579 if (CheckJNICalls) {
a61af66fc99e Initial load duke parents: diff changeset	580 fatal("Possible deadlock due to allocating while"
a61af66fc99e Initial load duke parents: diff changeset	581 " in jni critical section");
a61af66fc99e Initial load duke parents: diff changeset	582 }
a61af66fc99e Initial load duke parents: diff changeset	583 return NULL;
a61af66fc99e Initial load duke parents: diff changeset	584 }
a61af66fc99e Initial load duke parents: diff changeset	585 }
a61af66fc99e Initial load duke parents: diff changeset	586
a61af66fc99e Initial load duke parents: diff changeset	587 // Read the gc count while the heap lock is held.
a61af66fc99e Initial load duke parents: diff changeset	588 gc_count_before = Universe::heap()->total_collections();
a61af66fc99e Initial load duke parents: diff changeset	589 }
a61af66fc99e Initial load duke parents: diff changeset	590
a61af66fc99e Initial load duke parents: diff changeset	591 VM_GenCollectForAllocation op(size,
a61af66fc99e Initial load duke parents: diff changeset	592 is_tlab,
a61af66fc99e Initial load duke parents: diff changeset	593 gc_count_before);
a61af66fc99e Initial load duke parents: diff changeset	594 VMThread::execute(&op);
a61af66fc99e Initial load duke parents: diff changeset	595 if (op.prologue_succeeded()) {
a61af66fc99e Initial load duke parents: diff changeset	596 result = op.result();
a61af66fc99e Initial load duke parents: diff changeset	597 if (op.gc_locked()) {
a61af66fc99e Initial load duke parents: diff changeset	598 assert(result == NULL, "must be NULL if gc_locked() is true");
a61af66fc99e Initial load duke parents: diff changeset	599 continue; // retry and/or stall as necessary
a61af66fc99e Initial load duke parents: diff changeset	600 }
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	601
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	602 // 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	603 // 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	604 // 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	605 // 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	606 // 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	607
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	608 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	609 const bool softrefs_clear = all_soft_refs_clear();
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	610 assert(!limit_exceeded \|\| softrefs_clear, "Should have been cleared");
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	611 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	612 *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	613 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	614 if (op.result() != NULL) {
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	615 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	616 }
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	617 return NULL;
0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	618 }
0 a61af66fc99e Initial load duke parents: diff changeset	619 assert(result == NULL \|\| gch->is_in_reserved(result),
a61af66fc99e Initial load duke parents: diff changeset	620 "result not in heap");
a61af66fc99e Initial load duke parents: diff changeset	621 return result;
a61af66fc99e Initial load duke parents: diff changeset	622 }
a61af66fc99e Initial load duke parents: diff changeset	623
a61af66fc99e Initial load duke parents: diff changeset	624 // Give a warning if we seem to be looping forever.
a61af66fc99e Initial load duke parents: diff changeset	625 if ((QueuedAllocationWarningCount > 0) &&
a61af66fc99e Initial load duke parents: diff changeset	626 (try_count % QueuedAllocationWarningCount == 0)) {
a61af66fc99e Initial load duke parents: diff changeset	627 warning("TwoGenerationCollectorPolicy::mem_allocate_work retries %d times \n\t"
a61af66fc99e Initial load duke parents: diff changeset	628 " size=%d %s", try_count, size, is_tlab ? "(TLAB)" : "");
a61af66fc99e Initial load duke parents: diff changeset	629 }
a61af66fc99e Initial load duke parents: diff changeset	630 }
a61af66fc99e Initial load duke parents: diff changeset	631 }
a61af66fc99e Initial load duke parents: diff changeset	632
a61af66fc99e Initial load duke parents: diff changeset	633 HeapWord* GenCollectorPolicy::expand_heap_and_allocate(size_t size,
a61af66fc99e Initial load duke parents: diff changeset	634 bool is_tlab) {
a61af66fc99e Initial load duke parents: diff changeset	635 GenCollectedHeap *gch = GenCollectedHeap::heap();
a61af66fc99e Initial load duke parents: diff changeset	636 HeapWord* result = NULL;
a61af66fc99e Initial load duke parents: diff changeset	637 for (int i = number_of_generations() - 1; i >= 0 && result == NULL; i--) {
a61af66fc99e Initial load duke parents: diff changeset	638 Generation *gen = gch->get_gen(i);
a61af66fc99e Initial load duke parents: diff changeset	639 if (gen->should_allocate(size, is_tlab)) {
a61af66fc99e Initial load duke parents: diff changeset	640 result = gen->expand_and_allocate(size, is_tlab);
a61af66fc99e Initial load duke parents: diff changeset	641 }
a61af66fc99e Initial load duke parents: diff changeset	642 }
a61af66fc99e Initial load duke parents: diff changeset	643 assert(result == NULL \|\| gch->is_in_reserved(result), "result not in heap");
a61af66fc99e Initial load duke parents: diff changeset	644 return result;
a61af66fc99e Initial load duke parents: diff changeset	645 }
a61af66fc99e Initial load duke parents: diff changeset	646
a61af66fc99e Initial load duke parents: diff changeset	647 HeapWord* GenCollectorPolicy::satisfy_failed_allocation(size_t size,
a61af66fc99e Initial load duke parents: diff changeset	648 bool is_tlab) {
a61af66fc99e Initial load duke parents: diff changeset	649 GenCollectedHeap *gch = GenCollectedHeap::heap();
a61af66fc99e Initial load duke parents: diff changeset	650 GCCauseSetter x(gch, GCCause::_allocation_failure);
a61af66fc99e Initial load duke parents: diff changeset	651 HeapWord* result = NULL;
a61af66fc99e Initial load duke parents: diff changeset	652
a61af66fc99e Initial load duke parents: diff changeset	653 assert(size != 0, "Precondition violated");
a61af66fc99e Initial load duke parents: diff changeset	654 if (GC_locker::is_active_and_needs_gc()) {
a61af66fc99e Initial load duke parents: diff changeset	655 // GC locker is active; instead of a collection we will attempt
a61af66fc99e Initial load duke parents: diff changeset	656 // to expand the heap, if there's room for expansion.
a61af66fc99e Initial load duke parents: diff changeset	657 if (!gch->is_maximal_no_gc()) {
a61af66fc99e Initial load duke parents: diff changeset	658 result = expand_heap_and_allocate(size, is_tlab);
a61af66fc99e Initial load duke parents: diff changeset	659 }
a61af66fc99e Initial load duke parents: diff changeset	660 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	661 } else if (!gch->incremental_collection_will_fail(false /* don't consult_young */)) {
0 a61af66fc99e Initial load duke parents: diff changeset	662 // Do an incremental collection.
a61af66fc99e Initial load duke parents: diff changeset	663 gch->do_collection(false /* full */,
a61af66fc99e Initial load duke parents: diff changeset	664 false /* clear_all_soft_refs */,
a61af66fc99e Initial load duke parents: diff changeset	665 size /* size */,
a61af66fc99e Initial load duke parents: diff changeset	666 is_tlab /* is_tlab */,
a61af66fc99e Initial load duke parents: diff changeset	667 number_of_generations() - 1 /* max_level */);
a61af66fc99e Initial load duke parents: diff changeset	668 } else {
1994 6cd6d394f280 7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot \|\| !gch->incremental_collection_failed()) ysr parents: 1972 diff changeset	669 if (Verbose && PrintGCDetails) {
6cd6d394f280 7001033: assert(gch->gc_cause() == GCCause::_scavenge_alot \|\| !gch->incremental_collection_failed()) ysr parents: 1972 diff changeset	670 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	671 }
0 a61af66fc99e Initial load duke parents: diff changeset	672 // Try a full collection; see delta for bug id 6266275
a61af66fc99e Initial load duke parents: diff changeset	673 // for the original code and why this has been simplified
a61af66fc99e Initial load duke parents: diff changeset	674 // with from-space allocation criteria modified and
a61af66fc99e Initial load duke parents: diff changeset	675 // such allocation moved out of the safepoint path.
a61af66fc99e Initial load duke parents: diff changeset	676 gch->do_collection(true /* full */,
a61af66fc99e Initial load duke parents: diff changeset	677 false /* clear_all_soft_refs */,
a61af66fc99e Initial load duke parents: diff changeset	678 size /* size */,
a61af66fc99e Initial load duke parents: diff changeset	679 is_tlab /* is_tlab */,
a61af66fc99e Initial load duke parents: diff changeset	680 number_of_generations() - 1 /* max_level */);
a61af66fc99e Initial load duke parents: diff changeset	681 }
a61af66fc99e Initial load duke parents: diff changeset	682
a61af66fc99e Initial load duke parents: diff changeset	683 result = gch->attempt_allocation(size, is_tlab, false /first_only/);
a61af66fc99e Initial load duke parents: diff changeset	684
a61af66fc99e Initial load duke parents: diff changeset	685 if (result != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	686 assert(gch->is_in_reserved(result), "result not in heap");
a61af66fc99e Initial load duke parents: diff changeset	687 return result;
a61af66fc99e Initial load duke parents: diff changeset	688 }
a61af66fc99e Initial load duke parents: diff changeset	689
a61af66fc99e Initial load duke parents: diff changeset	690 // OK, collection failed, try expansion.
a61af66fc99e Initial load duke parents: diff changeset	691 result = expand_heap_and_allocate(size, is_tlab);
a61af66fc99e Initial load duke parents: diff changeset	692 if (result != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	693 return result;
a61af66fc99e Initial load duke parents: diff changeset	694 }
a61af66fc99e Initial load duke parents: diff changeset	695
a61af66fc99e Initial load duke parents: diff changeset	696 // If we reach this point, we're really out of memory. Try every trick
a61af66fc99e Initial load duke parents: diff changeset	697 // we can to reclaim memory. Force collection of soft references. Force
a61af66fc99e Initial load duke parents: diff changeset	698 // a complete compaction of the heap. Any additional methods for finding
a61af66fc99e Initial load duke parents: diff changeset	699 // free memory should be here, especially if they are expensive. If this
a61af66fc99e Initial load duke parents: diff changeset	700 // attempt fails, an OOM exception will be thrown.
a61af66fc99e Initial load duke parents: diff changeset	701 {
a61af66fc99e Initial load duke parents: diff changeset	702 IntFlagSetting flag_change(MarkSweepAlwaysCompactCount, 1); // Make sure the heap is fully compacted
a61af66fc99e Initial load duke parents: diff changeset	703
a61af66fc99e Initial load duke parents: diff changeset	704 gch->do_collection(true /* full */,
a61af66fc99e Initial load duke parents: diff changeset	705 true /* clear_all_soft_refs */,
a61af66fc99e Initial load duke parents: diff changeset	706 size /* size */,
a61af66fc99e Initial load duke parents: diff changeset	707 is_tlab /* is_tlab */,
a61af66fc99e Initial load duke parents: diff changeset	708 number_of_generations() - 1 /* max_level */);
a61af66fc99e Initial load duke parents: diff changeset	709 }
a61af66fc99e Initial load duke parents: diff changeset	710
a61af66fc99e Initial load duke parents: diff changeset	711 result = gch->attempt_allocation(size, is_tlab, false /* first_only */);
a61af66fc99e Initial load duke parents: diff changeset	712 if (result != NULL) {
a61af66fc99e Initial load duke parents: diff changeset	713 assert(gch->is_in_reserved(result), "result not in heap");
a61af66fc99e Initial load duke parents: diff changeset	714 return result;
a61af66fc99e Initial load duke parents: diff changeset	715 }
a61af66fc99e Initial load duke parents: diff changeset	716
1387 0bfd3fb24150 6858496: Clear all SoftReferences before an out-of-memory due to GC overhead limit. jmasa parents: 1064 diff changeset	717 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	718 "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	719
0 a61af66fc99e Initial load duke parents: diff changeset	720 // What else? We might try synchronous finalization later. If the total
a61af66fc99e Initial load duke parents: diff changeset	721 // space available is large enough for the allocation, then a more
a61af66fc99e Initial load duke parents: diff changeset	722 // complete compaction phase than we've tried so far might be
a61af66fc99e Initial load duke parents: diff changeset	723 // appropriate.
a61af66fc99e Initial load duke parents: diff changeset	724 return NULL;
a61af66fc99e Initial load duke parents: diff changeset	725 }
a61af66fc99e Initial load duke parents: diff changeset	726
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	727 MetaWord* CollectorPolicy::satisfy_failed_metadata_allocation(
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	728 ClassLoaderData* loader_data,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	729 size_t word_size,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	730 Metaspace::MetadataType mdtype) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	731 uint loop_count = 0;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	732 uint gc_count = 0;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	733 uint full_gc_count = 0;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	734
6923 3fadc0e8cffe 8000988: VM deadlock when running btree006 on windows-i586 jmasa parents: 6753 diff changeset	735 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	736
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	737 do {
6753 8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	738 MetaWord* result = NULL;
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	739 if (GC_locker::is_active_and_needs_gc()) {
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	740 // 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	741 // 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	742 // in a critical section itself.
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	743 result =
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	744 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	745 mdtype);
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	746 if (result != NULL) {
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	747 return result;
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	748 }
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	749 JavaThread* jthr = JavaThread::current();
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	750 if (!jthr->in_critical()) {
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	751 // Wait for JNI critical section to be exited
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	752 GC_locker::stall_until_clear();
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	753 // 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	754 // 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	755 // is (currently) needed for unloading classes so continue
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	756 // 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	757 continue;
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	758 } else {
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	759 if (CheckJNICalls) {
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	760 fatal("Possible deadlock due to allocating while"
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	761 " in jni critical section");
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	762 }
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	763 return NULL;
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	764 }
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	765 }
8da5e203b993 7197557: NPG: nsk/sysdict/vm/stress/chain/chain004 hangs intermittently jmasa parents: 6725 diff changeset	766
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	767 { // 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	768 MutexLocker ml(Heap_lock);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	769 gc_count = Universe::heap()->total_collections();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	770 full_gc_count = Universe::heap()->total_full_collections();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	771 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	772
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	773 // Generate a VM operation
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	774 VM_CollectForMetadataAllocation op(loader_data,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	775 word_size,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	776 mdtype,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	777 gc_count,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	778 full_gc_count,
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	779 GCCause::_metadata_GC_threshold);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	780 VMThread::execute(&op);
7446 e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	781
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	782 // 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	783 // before checking success because the prologue
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	784 // 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	785 // been locked out.
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	786 if (op.gc_locked()) {
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	787 continue;
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	788 }
e51c9860cf66 8005082: NPG: Add specialized Metachunk sizes for reflection and anonymous classloaders jmasa parents: 7180 diff changeset	789
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	790 if (op.prologue_succeeded()) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	791 return op.result();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	792 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	793 loop_count++;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	794 if ((QueuedAllocationWarningCount > 0) &&
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	795 (loop_count % QueuedAllocationWarningCount == 0)) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	796 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	797 " size=%d", loop_count, word_size);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	798 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	799 } while (true); // Until a GC is done
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	800 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 3960 diff changeset	801
0 a61af66fc99e Initial load duke parents: diff changeset	802 // Return true if any of the following is true:
a61af66fc99e Initial load duke parents: diff changeset	803 // . the allocation won't fit into the current young gen heap
a61af66fc99e Initial load duke parents: diff changeset	804 // . gc locker is occupied (jni critical section)
a61af66fc99e Initial load duke parents: diff changeset	805 // . heap memory is tight -- the most recent previous collection
a61af66fc99e Initial load duke parents: diff changeset	806 // was a full collection because a partial collection (would
a61af66fc99e Initial load duke parents: diff changeset	807 // have) failed and is likely to fail again
a61af66fc99e Initial load duke parents: diff changeset	808 bool GenCollectorPolicy::should_try_older_generation_allocation(
a61af66fc99e Initial load duke parents: diff changeset	809 size_t word_size) const {
a61af66fc99e Initial load duke parents: diff changeset	810 GenCollectedHeap* gch = GenCollectedHeap::heap();
a61af66fc99e Initial load duke parents: diff changeset	811 size_t gen0_capacity = gch->get_gen(0)->capacity_before_gc();
a61af66fc99e Initial load duke parents: diff changeset	812 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	813 \|\| 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	814 \|\| gch->incremental_collection_failed();
0 a61af66fc99e Initial load duke parents: diff changeset	815 }
a61af66fc99e Initial load duke parents: diff changeset	816
a61af66fc99e Initial load duke parents: diff changeset	817
a61af66fc99e Initial load duke parents: diff changeset	818 //
a61af66fc99e Initial load duke parents: diff changeset	819 // MarkSweepPolicy methods
a61af66fc99e Initial load duke parents: diff changeset	820 //
a61af66fc99e Initial load duke parents: diff changeset	821
a61af66fc99e Initial load duke parents: diff changeset	822 MarkSweepPolicy::MarkSweepPolicy() {
a61af66fc99e Initial load duke parents: diff changeset	823 initialize_all();
a61af66fc99e Initial load duke parents: diff changeset	824 }
a61af66fc99e Initial load duke parents: diff changeset	825
a61af66fc99e Initial load duke parents: diff changeset	826 void MarkSweepPolicy::initialize_generations() {
a61af66fc99e Initial load duke parents: diff changeset	827 _generations = new GenerationSpecPtr[number_of_generations()];
a61af66fc99e Initial load duke parents: diff changeset	828 if (_generations == NULL)
a61af66fc99e Initial load duke parents: diff changeset	829 vm_exit_during_initialization("Unable to allocate gen spec");
a61af66fc99e Initial load duke parents: diff changeset	830
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	831 if (UseParNewGC) {
0 a61af66fc99e Initial load duke parents: diff changeset	832 _generations[0] = new GenerationSpec(Generation::ParNew, _initial_gen0_size, _max_gen0_size);
a61af66fc99e Initial load duke parents: diff changeset	833 } else {
a61af66fc99e Initial load duke parents: diff changeset	834 _generations[0] = new GenerationSpec(Generation::DefNew, _initial_gen0_size, _max_gen0_size);
a61af66fc99e Initial load duke parents: diff changeset	835 }
a61af66fc99e Initial load duke parents: diff changeset	836 _generations[1] = new GenerationSpec(Generation::MarkSweepCompact, _initial_gen1_size, _max_gen1_size);
a61af66fc99e Initial load duke parents: diff changeset	837
a61af66fc99e Initial load duke parents: diff changeset	838 if (_generations[0] == NULL \|\| _generations[1] == NULL)
a61af66fc99e Initial load duke parents: diff changeset	839 vm_exit_during_initialization("Unable to allocate gen spec");
a61af66fc99e Initial load duke parents: diff changeset	840 }
a61af66fc99e Initial load duke parents: diff changeset	841
a61af66fc99e Initial load duke parents: diff changeset	842 void MarkSweepPolicy::initialize_gc_policy_counters() {
a61af66fc99e Initial load duke parents: diff changeset	843 // 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	844 if (UseParNewGC) {
0 a61af66fc99e Initial load duke parents: diff changeset	845 _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	846 } else {
0 a61af66fc99e Initial load duke parents: diff changeset	847 _gc_policy_counters = new GCPolicyCounters("Copy:MSC", 2, 3);
a61af66fc99e Initial load duke parents: diff changeset	848 }
a61af66fc99e Initial load duke parents: diff changeset	849 }

Mercurial > hg > truffle

annotate src/share/vm/memory/collectorPolicy.cpp @ 8001:db9981fd3124