graal-compiler: src/share/vm/runtime/sweeper.cpp annotate

annotate src/share/vm/runtime/sweeper.cpp @ 13074:78da3894b86f

8027593: performance drop with constrained codecache starting with hs25 b111 Summary: Fixed proper sweeping of small code cache sizes Reviewed-by: kvn, iveresov

author	anoll
date	Tue, 12 Nov 2013 09:32:50 +0100
parents	510fbd28919c
children	096c224171c4 938e1e64e28f

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1538 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1538 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: 1538 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: 1783 diff changeset	25 #include "precompiled.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	26 #include "code/codeCache.hpp"
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	27 #include "code/compiledIC.hpp"
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	28 #include "code/icBuffer.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	29 #include "code/nmethod.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	30 #include "compiler/compileBroker.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	31 #include "memory/resourceArea.hpp"
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	32 #include "oops/method.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	33 #include "runtime/atomic.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	34 #include "runtime/compilationPolicy.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	35 #include "runtime/mutexLocker.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	36 #include "runtime/os.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	37 #include "runtime/sweeper.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	38 #include "runtime/vm_operations.hpp"
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	39 #include "trace/tracing.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	40 #include "utilities/events.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	41 #include "utilities/xmlstream.hpp"
0 a61af66fc99e Initial load duke parents: diff changeset	42
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	43 #ifdef ASSERT
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	44
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	45 #define SWEEP(nm) record_sweep(nm, __LINE__)
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	46 // Sweeper logging code
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	47 class SweeperRecord {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	48 public:
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	49 int traversal;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	50 int invocation;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	51 int compile_id;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	52 long traversal_mark;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	53 int state;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	54 const char* kind;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	55 address vep;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	56 address uep;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	57 int line;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	58
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	59 void print() {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	60 tty->print_cr("traversal = %d invocation = %d compile_id = %d %s uep = " PTR_FORMAT " vep = "
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	61 PTR_FORMAT " state = %d traversal_mark %d line = %d",
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	62 traversal,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	63 invocation,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	64 compile_id,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	65 kind == NULL ? "" : kind,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	66 uep,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	67 vep,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	68 state,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	69 traversal_mark,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	70 line);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	71 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	72 };
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	73
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	74 static int _sweep_index = 0;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	75 static SweeperRecord* _records = NULL;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	76
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	77 void NMethodSweeper::report_events(int id, address entry) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	78 if (_records != NULL) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	79 for (int i = _sweep_index; i < SweeperLogEntries; i++) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	80 if (_records[i].uep == entry \|\|
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	81 _records[i].vep == entry \|\|
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	82 _records[i].compile_id == id) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	83 _records[i].print();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	84 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	85 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	86 for (int i = 0; i < _sweep_index; i++) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	87 if (_records[i].uep == entry \|\|
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	88 _records[i].vep == entry \|\|
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	89 _records[i].compile_id == id) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	90 _records[i].print();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	91 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	92 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	93 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	94 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	95
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	96 void NMethodSweeper::report_events() {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	97 if (_records != NULL) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	98 for (int i = _sweep_index; i < SweeperLogEntries; i++) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	99 // skip empty records
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	100 if (_records[i].vep == NULL) continue;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	101 _records[i].print();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	102 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	103 for (int i = 0; i < _sweep_index; i++) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	104 // skip empty records
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	105 if (_records[i].vep == NULL) continue;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	106 _records[i].print();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	107 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	108 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	109 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	110
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	111 void NMethodSweeper::record_sweep(nmethod* nm, int line) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	112 if (_records != NULL) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	113 _records[_sweep_index].traversal = _traversals;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	114 _records[_sweep_index].traversal_mark = nm->_stack_traversal_mark;
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	115 _records[_sweep_index].invocation = _sweep_fractions_left;
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	116 _records[_sweep_index].compile_id = nm->compile_id();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	117 _records[_sweep_index].kind = nm->compile_kind();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	118 _records[_sweep_index].state = nm->_state;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	119 _records[_sweep_index].vep = nm->verified_entry_point();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	120 _records[_sweep_index].uep = nm->entry_point();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	121 _records[_sweep_index].line = line;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	122 _sweep_index = (_sweep_index + 1) % SweeperLogEntries;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	123 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	124 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	125 #else
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	126 #define SWEEP(nm)
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	127 #endif
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	128
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	129 nmethod* NMethodSweeper::_current = NULL; // Current nmethod
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	130 long NMethodSweeper::_traversals = 0; // Stack scan count, also sweep ID.
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	131 long NMethodSweeper::_time_counter = 0; // Virtual time used to periodically invoke sweeper
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	132 long NMethodSweeper::_last_sweep = 0; // Value of _time_counter when the last sweep happened
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	133 int NMethodSweeper::_seen = 0; // Nof. nmethod we have currently processed in current pass of CodeCache
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	134 int NMethodSweeper::_flushed_count = 0; // Nof. nmethods flushed in current sweep
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	135 int NMethodSweeper::_zombified_count = 0; // Nof. nmethods made zombie in current sweep
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	136 int NMethodSweeper::_marked_for_reclamation_count = 0; // Nof. nmethods marked for reclaim in current sweep
0 a61af66fc99e Initial load duke parents: diff changeset	137
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	138 volatile bool NMethodSweeper::_should_sweep = true; // Indicates if we should invoke the sweeper
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	139 volatile int NMethodSweeper::_sweep_fractions_left = 0; // Nof. invocations left until we are completed with this pass
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	140 volatile int NMethodSweeper::_sweep_started = 0; // Flag to control conc sweeper
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	141 volatile int NMethodSweeper::_bytes_changed = 0; // Counts the total nmethod size if the nmethod changed from:
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	142 // 1) alive -> not_entrant
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	143 // 2) not_entrant -> zombie
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	144 // 3) zombie -> marked_for_reclamation
0 a61af66fc99e Initial load duke parents: diff changeset	145
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	146 int NMethodSweeper::_total_nof_methods_reclaimed = 0; // Accumulated nof methods flushed
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	147 jlong NMethodSweeper::_total_time_sweeping = 0; // Accumulated time sweeping
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	148 jlong NMethodSweeper::_total_time_this_sweep = 0; // Total time this sweep
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	149 jlong NMethodSweeper::_peak_sweep_time = 0; // Peak time for a full sweep
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	150 jlong NMethodSweeper::_peak_sweep_fraction_time = 0; // Peak time sweeping one fraction
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	151 int NMethodSweeper::_hotness_counter_reset_val = 0;
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	152
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	153
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	154 class MarkActivationClosure: public CodeBlobClosure {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	155 public:
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	156 virtual void do_code_blob(CodeBlob* cb) {
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	157 if (cb->is_nmethod()) {
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	158 nmethod* nm = (nmethod*)cb;
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	159 nm->set_hotness_counter(NMethodSweeper::hotness_counter_reset_val());
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	160 // If we see an activation belonging to a non_entrant nmethod, we mark it.
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	161 if (nm->is_not_entrant()) {
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	162 nm->mark_as_seen_on_stack();
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	163 }
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	164 }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	165 }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	166 };
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	167 static MarkActivationClosure mark_activation_closure;
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	168
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	169 class SetHotnessClosure: public CodeBlobClosure {
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	170 public:
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	171 virtual void do_code_blob(CodeBlob* cb) {
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	172 if (cb->is_nmethod()) {
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	173 nmethod* nm = (nmethod*)cb;
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	174 nm->set_hotness_counter(NMethodSweeper::hotness_counter_reset_val());
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	175 }
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	176 }
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	177 };
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	178 static SetHotnessClosure set_hotness_closure;
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	179
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	180
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	181 int NMethodSweeper::hotness_counter_reset_val() {
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	182 if (_hotness_counter_reset_val == 0) {
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	183 _hotness_counter_reset_val = (ReservedCodeCacheSize < M) ? 1 : (ReservedCodeCacheSize / M) * 2;
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	184 }
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	185 return _hotness_counter_reset_val;
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	186 }
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	187 bool NMethodSweeper::sweep_in_progress() {
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	188 return (_current != NULL);
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	189 }
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	190
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	191 // Scans the stacks of all Java threads and marks activations of not-entrant methods.
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	192 // No need to synchronize access, since 'mark_active_nmethods' is always executed at a
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	193 // safepoint.
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	194 void NMethodSweeper::mark_active_nmethods() {
0 a61af66fc99e Initial load duke parents: diff changeset	195 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at a safepoint");
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	196 // If we do not want to reclaim not-entrant or zombie methods there is no need
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	197 // to scan stacks
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	198 if (!MethodFlushing) {
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	199 return;
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	200 }
0 a61af66fc99e Initial load duke parents: diff changeset	201
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	202 // Increase time so that we can estimate when to invoke the sweeper again.
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	203 _time_counter++;
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	204
0 a61af66fc99e Initial load duke parents: diff changeset	205 // Check for restart
a61af66fc99e Initial load duke parents: diff changeset	206 assert(CodeCache::find_blob_unsafe(_current) == _current, "Sweeper nmethod cached state invalid");
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	207 if (!sweep_in_progress()) {
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	208 _seen = 0;
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	209 _sweep_fractions_left = NmethodSweepFraction;
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	210 _current = CodeCache::first_nmethod();
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	211 _traversals += 1;
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	212 _total_time_this_sweep = 0;
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	213
0 a61af66fc99e Initial load duke parents: diff changeset	214 if (PrintMethodFlushing) {
a61af66fc99e Initial load duke parents: diff changeset	215 tty->print_cr("### Sweep: stack traversal %d", _traversals);
a61af66fc99e Initial load duke parents: diff changeset	216 }
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	217 Threads::nmethods_do(&mark_activation_closure);
0 a61af66fc99e Initial load duke parents: diff changeset	218
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	219 } else {
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	220 // Only set hotness counter
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	221 Threads::nmethods_do(&set_hotness_closure);
0 a61af66fc99e Initial load duke parents: diff changeset	222 }
a61af66fc99e Initial load duke parents: diff changeset	223
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	224 OrderAccess::storestore();
0 a61af66fc99e Initial load duke parents: diff changeset	225 }
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	226 /**
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	227 * This function invokes the sweeper if at least one of the three conditions is met:
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	228 * (1) The code cache is getting full
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	229 * (2) There are sufficient state changes in/since the last sweep.
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	230 * (3) We have not been sweeping for 'some time'
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	231 */
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	232 void NMethodSweeper::possibly_sweep() {
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	233 assert(JavaThread::current()->thread_state() == _thread_in_vm, "must run in vm mode");
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	234 if (!MethodFlushing \|\| !sweep_in_progress()) {
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	235 return;
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	236 }
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	237
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	238 // If there was no state change while nmethod sweeping, 'should_sweep' will be false.
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	239 // This is one of the two places where should_sweep can be set to true. The general
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	240 // idea is as follows: If there is enough free space in the code cache, there is no
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	241 // need to invoke the sweeper. The following formula (which determines whether to invoke
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	242 // the sweeper or not) depends on the assumption that for larger ReservedCodeCacheSizes
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	243 // we need less frequent sweeps than for smaller ReservedCodecCacheSizes. Furthermore,
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	244 // the formula considers how much space in the code cache is currently used. Here are
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	245 // some examples that will (hopefully) help in understanding.
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	246 //
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	247 // Small ReservedCodeCacheSizes: (e.g., < 16M) We invoke the sweeper every time, since
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	248 // the result of the division is 0. This
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	249 // keeps the used code cache size small
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	250 // (important for embedded Java)
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	251 // Large ReservedCodeCacheSize : (e.g., 256M + code cache is 10% full). The formula
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	252 // computes: (256 / 16) - 1 = 15
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	253 // As a result, we invoke the sweeper after
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	254 // 15 invocations of 'mark_active_nmethods.
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	255 // Large ReservedCodeCacheSize: (e.g., 256M + code Cache is 90% full). The formula
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	256 // computes: (256 / 16) - 10 = 6.
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	257 if (!_should_sweep) {
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	258 int time_since_last_sweep = _time_counter - _last_sweep;
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	259 double wait_until_next_sweep = (ReservedCodeCacheSize / (16 * M)) - time_since_last_sweep -
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	260 CodeCache::reverse_free_ratio();
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	261
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	262 if ((wait_until_next_sweep <= 0.0) \|\| !CompileBroker::should_compile_new_jobs()) {
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	263 _should_sweep = true;
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	264 }
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	265 }
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	266
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	267 if (_should_sweep && _sweep_fractions_left > 0) {
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	268 // Only one thread at a time will sweep
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	269 jint old = Atomic::cmpxchg( 1, &_sweep_started, 0 );
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	270 if (old != 0) {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	271 return;
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	272 }
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	273 #ifdef ASSERT
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	274 if (LogSweeper && _records == NULL) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	275 // Create the ring buffer for the logging code
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 4945 diff changeset	276 _records = NEW_C_HEAP_ARRAY(SweeperRecord, SweeperLogEntries, mtGC);
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	277 memset(_records, 0, sizeof(SweeperRecord) * SweeperLogEntries);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	278 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	279 #endif
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	280
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	281 if (_sweep_fractions_left > 0) {
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	282 sweep_code_cache();
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	283 _sweep_fractions_left--;
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	284 }
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	285
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	286 // We are done with sweeping the code cache once.
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	287 if (_sweep_fractions_left == 0) {
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	288 _last_sweep = _time_counter;
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	289 // Reset flag; temporarily disables sweeper
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	290 _should_sweep = false;
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	291 // If there was enough state change, 'possibly_enable_sweeper()'
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	292 // sets '_should_sweep' to true
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	293 possibly_enable_sweeper();
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	294 // Reset _bytes_changed only if there was enough state change. _bytes_changed
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	295 // can further increase by calls to 'report_state_change'.
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	296 if (_should_sweep) {
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	297 _bytes_changed = 0;
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	298 }
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	299 }
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	300 _sweep_started = 0;
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	301 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	302 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	303
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	304 void NMethodSweeper::sweep_code_cache() {
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	305 jlong sweep_start_counter = os::elapsed_counter();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	306
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	307 _flushed_count = 0;
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	308 _zombified_count = 0;
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	309 _marked_for_reclamation_count = 0;
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	310
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	311 if (PrintMethodFlushing && Verbose) {
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	312 tty->print_cr("### Sweep at %d out of %d. Invocations left: %d", _seen, CodeCache::nof_nmethods(), _sweep_fractions_left);
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	313 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	314
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	315 if (!CompileBroker::should_compile_new_jobs()) {
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	316 // If we have turned off compilations we might as well do full sweeps
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	317 // in order to reach the clean state faster. Otherwise the sleeping compiler
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	318 // threads will slow down sweeping.
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	319 _sweep_fractions_left = 1;
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	320 }
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	321
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	322 // We want to visit all nmethods after NmethodSweepFraction
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	323 // invocations so divide the remaining number of nmethods by the
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	324 // remaining number of invocations. This is only an estimate since
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	325 // the number of nmethods changes during the sweep so the final
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	326 // stage must iterate until it there are no more nmethods.
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	327 int todo = (CodeCache::nof_nmethods() - _seen) / _sweep_fractions_left;
12266 ab274453d37f 8022883: Assertion failed: sweptCount >= flushedCount + markedCount + zombifiedCount anoll parents: 10405 diff changeset	328 int swept_count = 0;
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	329
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	330
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	331 assert(!SafepointSynchronize::is_at_safepoint(), "should not be in safepoint when we get here");
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	332 assert(!CodeCache_lock->owned_by_self(), "just checking");
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	333
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	334 int freed_memory = 0;
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	335 {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	336 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	337
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	338 // The last invocation iterates until there are no more nmethods
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	339 for (int i = 0; (i < todo \|\| _sweep_fractions_left == 1) && _current != NULL; i++) {
12266 ab274453d37f 8022883: Assertion failed: sweptCount >= flushedCount + markedCount + zombifiedCount anoll parents: 10405 diff changeset	340 swept_count++;
4945 cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	341 if (SafepointSynchronize::is_synchronizing()) { // Safepoint request
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	342 if (PrintMethodFlushing && Verbose) {
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	343 tty->print_cr("### Sweep at %d out of %d, invocation: %d, yielding to safepoint", _seen, CodeCache::nof_nmethods(), _sweep_fractions_left);
4945 cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	344 }
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	345 MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	346
4945 cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	347 assert(Thread::current()->is_Java_thread(), "should be java thread");
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	348 JavaThread* thread = (JavaThread*)Thread::current();
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	349 ThreadBlockInVM tbivm(thread);
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	350 thread->java_suspend_self();
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	351 }
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	352 // Since we will give up the CodeCache_lock, always skip ahead
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	353 // to the next nmethod. Other blobs can be deleted by other
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	354 // threads but nmethods are only reclaimed by the sweeper.
1615 ff38d05ea86f 6956958: assert(is_clean() \|\| is_call_to_compiled() \|\| is_call_to_interpreted() \|\| is_optimized() \|\| is_megam never parents: 1552 diff changeset	355 nmethod* next = CodeCache::next_nmethod(_current);
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	356
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	357 // Now ready to process nmethod and give up CodeCache_lock
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	358 {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	359 MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	360 freed_memory += process_nmethod(_current);
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	361 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	362 _seen++;
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	363 _current = next;
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	364 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	365 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	366
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	367 assert(_sweep_fractions_left > 1 \|\| _current == NULL, "must have scanned the whole cache");
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	368
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	369 jlong sweep_end_counter = os::elapsed_counter();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	370 jlong sweep_time = sweep_end_counter - sweep_start_counter;
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	371 _total_time_sweeping += sweep_time;
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	372 _total_time_this_sweep += sweep_time;
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	373 _peak_sweep_fraction_time = MAX2(sweep_time, _peak_sweep_fraction_time);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	374 _total_nof_methods_reclaimed += _flushed_count;
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	375
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	376 EventSweepCodeCache event(UNTIMED);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	377 if (event.should_commit()) {
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	378 event.set_starttime(sweep_start_counter);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	379 event.set_endtime(sweep_end_counter);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	380 event.set_sweepIndex(_traversals);
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	381 event.set_sweepFractionIndex(NmethodSweepFraction - _sweep_fractions_left + 1);
12266 ab274453d37f 8022883: Assertion failed: sweptCount >= flushedCount + markedCount + zombifiedCount anoll parents: 10405 diff changeset	382 event.set_sweptCount(swept_count);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	383 event.set_flushedCount(_flushed_count);
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	384 event.set_markedCount(_marked_for_reclamation_count);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	385 event.set_zombifiedCount(_zombified_count);
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	386 event.commit();
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	387 }
f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	388
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	389 #ifdef ASSERT
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	390 if(PrintMethodFlushing) {
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	391 tty->print_cr("### sweeper: sweep time(%d): " INT64_FORMAT, _sweep_fractions_left, (jlong)sweep_time);
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	392 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	393 #endif
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	394
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	395 if (_sweep_fractions_left == 1) {
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	396 _peak_sweep_time = MAX2(_peak_sweep_time, _total_time_this_sweep);
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	397 log_sweep("finished");
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	398 }
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	399
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	400 // Sweeper is the only case where memory is released, check here if it
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	401 // is time to restart the compiler. Only checking if there is a certain
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	402 // amount of free memory in the code cache might lead to re-enabling
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	403 // compilation although no memory has been released. For example, there are
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	404 // cases when compilation was disabled although there is 4MB (or more) free
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	405 // memory in the code cache. The reason is code cache fragmentation. Therefore,
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	406 // it only makes sense to re-enable compilation if we have actually freed memory.
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	407 // Note that typically several kB are released for sweeping 16MB of the code
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	408 // cache. As a result, 'freed_memory' > 0 to restart the compiler.
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	409 if (!CompileBroker::should_compile_new_jobs() && (freed_memory > 0)) {
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	410 CompileBroker::set_should_compile_new_jobs(CompileBroker::run_compilation);
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	411 log_sweep("restart_compiler");
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	412 }
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	413 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	414
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	415 /**
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	416 * This function updates the sweeper statistics that keep track of nmethods
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	417 * state changes. If there is 'enough' state change, the sweeper is invoked
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	418 * as soon as possible. There can be data races on _bytes_changed. The data
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	419 * races are benign, since it does not matter if we loose a couple of bytes.
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	420 * In the worst case we call the sweeper a little later. Also, we are guaranteed
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	421 * to invoke the sweeper if the code cache gets full.
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	422 */
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	423 void NMethodSweeper::report_state_change(nmethod* nm) {
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	424 _bytes_changed += nm->total_size();
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	425 possibly_enable_sweeper();
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	426 }
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	427
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	428 /**
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	429 * Function determines if there was 'enough' state change in the code cache to invoke
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	430 * the sweeper again. Currently, we determine 'enough' as more than 1% state change in
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	431 * the code cache since the last sweep.
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	432 */
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	433 void NMethodSweeper::possibly_enable_sweeper() {
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	434 double percent_changed = ((double)_bytes_changed / (double)ReservedCodeCacheSize) * 100;
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	435 if (percent_changed > 1.0) {
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	436 _should_sweep = true;
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	437 }
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	438 }
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	439
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	440 class NMethodMarker: public StackObj {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	441 private:
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	442 CompilerThread* _thread;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	443 public:
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	444 NMethodMarker(nmethod* nm) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	445 _thread = CompilerThread::current();
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	446 if (!nm->is_zombie() && !nm->is_unloaded()) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	447 // Only expose live nmethods for scanning
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	448 _thread->set_scanned_nmethod(nm);
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	449 }
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	450 }
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	451 ~NMethodMarker() {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	452 _thread->set_scanned_nmethod(NULL);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	453 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	454 };
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	455
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	456 void NMethodSweeper::release_nmethod(nmethod *nm) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	457 // Clean up any CompiledICHolders
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	458 {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	459 ResourceMark rm;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	460 MutexLocker ml_patch(CompiledIC_lock);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	461 RelocIterator iter(nm);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	462 while (iter.next()) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	463 if (iter.type() == relocInfo::virtual_call_type) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	464 CompiledIC::cleanup_call_site(iter.virtual_call_reloc());
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	465 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	466 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	467 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	468
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	469 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	470 nm->flush();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	471 }
0 a61af66fc99e Initial load duke parents: diff changeset	472
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	473 int NMethodSweeper::process_nmethod(nmethod *nm) {
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	474 assert(!CodeCache_lock->owned_by_self(), "just checking");
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	475
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	476 int freed_memory = 0;
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	477 // Make sure this nmethod doesn't get unloaded during the scan,
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	478 // since safepoints may happen during acquired below locks.
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	479 NMethodMarker nmm(nm);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	480 SWEEP(nm);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	481
0 a61af66fc99e Initial load duke parents: diff changeset	482 // Skip methods that are currently referenced by the VM
a61af66fc99e Initial load duke parents: diff changeset	483 if (nm->is_locked_by_vm()) {
a61af66fc99e Initial load duke parents: diff changeset	484 // But still remember to clean-up inline caches for alive nmethods
a61af66fc99e Initial load duke parents: diff changeset	485 if (nm->is_alive()) {
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	486 // Clean inline caches that point to zombie/non-entrant methods
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	487 MutexLocker cl(CompiledIC_lock);
0 a61af66fc99e Initial load duke parents: diff changeset	488 nm->cleanup_inline_caches();
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	489 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	490 }
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	491 return freed_memory;
0 a61af66fc99e Initial load duke parents: diff changeset	492 }
a61af66fc99e Initial load duke parents: diff changeset	493
a61af66fc99e Initial load duke parents: diff changeset	494 if (nm->is_zombie()) {
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	495 // If it is the first time we see nmethod then we mark it. Otherwise,
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	496 // we reclaim it. When we have seen a zombie method twice, we know that
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	497 // there are no inline caches that refer to it.
0 a61af66fc99e Initial load duke parents: diff changeset	498 if (nm->is_marked_for_reclamation()) {
a61af66fc99e Initial load duke parents: diff changeset	499 assert(!nm->is_locked_by_vm(), "must not flush locked nmethods");
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	500 if (PrintMethodFlushing && Verbose) {
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	501 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (marked for reclamation) being flushed", nm->compile_id(), nm);
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	502 }
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	503 freed_memory = nm->total_size();
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	504 release_nmethod(nm);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	505 _flushed_count++;
0 a61af66fc99e Initial load duke parents: diff changeset	506 } else {
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	507 if (PrintMethodFlushing && Verbose) {
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	508 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (zombie) being marked for reclamation", nm->compile_id(), nm);
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	509 }
0 a61af66fc99e Initial load duke parents: diff changeset	510 nm->mark_for_reclamation();
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	511 // Keep track of code cache state change
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	512 _bytes_changed += nm->total_size();
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	513 _marked_for_reclamation_count++;
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	514 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	515 }
a61af66fc99e Initial load duke parents: diff changeset	516 } else if (nm->is_not_entrant()) {
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	517 // If there are no current activations of this method on the
0 a61af66fc99e Initial load duke parents: diff changeset	518 // stack we can safely convert it to a zombie method
a61af66fc99e Initial load duke parents: diff changeset	519 if (nm->can_not_entrant_be_converted()) {
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	520 if (PrintMethodFlushing && Verbose) {
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	521 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (not entrant) being made zombie", nm->compile_id(), nm);
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	522 }
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	523 // Code cache state change is tracked in make_zombie()
0 a61af66fc99e Initial load duke parents: diff changeset	524 nm->make_zombie();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	525 _zombified_count++;
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	526 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	527 } else {
a61af66fc99e Initial load duke parents: diff changeset	528 // Still alive, clean up its inline caches
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	529 MutexLocker cl(CompiledIC_lock);
0 a61af66fc99e Initial load duke parents: diff changeset	530 nm->cleanup_inline_caches();
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	531 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	532 }
a61af66fc99e Initial load duke parents: diff changeset	533 } else if (nm->is_unloaded()) {
a61af66fc99e Initial load duke parents: diff changeset	534 // Unloaded code, just make it a zombie
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	535 if (PrintMethodFlushing && Verbose) {
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	536 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (unloaded) being made zombie", nm->compile_id(), nm);
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	537 }
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	538 if (nm->is_osr_method()) {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	539 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	540 // No inline caches will ever point to osr methods, so we can just remove it
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	541 freed_memory = nm->total_size();
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	542 release_nmethod(nm);
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	543 _flushed_count++;
0 a61af66fc99e Initial load duke parents: diff changeset	544 } else {
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	545 // Code cache state change is tracked in make_zombie()
0 a61af66fc99e Initial load duke parents: diff changeset	546 nm->make_zombie();
10405 f2110083203d 8005849: JEP 167: Event-Based JVM Tracing sla parents: 10206 diff changeset	547 _zombified_count++;
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	548 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	549 }
a61af66fc99e Initial load duke parents: diff changeset	550 } else {
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	551 if (UseCodeCacheFlushing) {
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	552 if (!nm->is_locked_by_vm() && !nm->is_osr_method() && !nm->is_native_method()) {
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	553 // Do not make native methods and OSR-methods not-entrant
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	554 nm->dec_hotness_counter();
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	555 // Get the initial value of the hotness counter. This value depends on the
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	556 // ReservedCodeCacheSize
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	557 int reset_val = hotness_counter_reset_val();
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	558 int time_since_reset = reset_val - nm->hotness_counter();
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	559 double threshold = -reset_val + (CodeCache::reverse_free_ratio() * NmethodSweepActivity);
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	560 // The less free space in the code cache we have - the bigger reverse_free_ratio() is.
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	561 // I.e., 'threshold' increases with lower available space in the code cache and a higher
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	562 // NmethodSweepActivity. If the current hotness counter - which decreases from its initial
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	563 // value until it is reset by stack walking - is smaller than the computed threshold, the
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	564 // corresponding nmethod is considered for removal.
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	565 if ((NmethodSweepActivity > 0) && (nm->hotness_counter() < threshold) && (time_since_reset > 10)) {
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	566 // A method is marked as not-entrant if the method is
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	567 // 1) 'old enough': nm->hotness_counter() < threshold
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	568 // 2) The method was in_use for a minimum amount of time: (time_since_reset > 10)
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	569 // The second condition is necessary if we are dealing with very small code cache
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	570 // sizes (e.g., <10m) and the code cache size is too small to hold all hot methods.
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	571 // The second condition ensures that methods are not immediately made not-entrant
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	572 // after compilation.
510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	573 nm->make_not_entrant();
13074 78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	574 // Code cache state change is tracked in make_not_entrant()
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	575 if (PrintMethodFlushing && Verbose) {
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	576 tty->print_cr("### Nmethod %d/" PTR_FORMAT "made not-entrant: hotness counter %d/%d threshold %f",
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	577 nm->compile_id(), nm, nm->hotness_counter(), reset_val, threshold);
78da3894b86f 8027593: performance drop with constrained codecache starting with hs25 b111 anoll parents: 12324 diff changeset	578 }
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	579 }
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	580 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	581 }
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	582 // Clean-up all inline caches that point to zombie/non-reentrant methods
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	583 MutexLocker cl(CompiledIC_lock);
0 a61af66fc99e Initial load duke parents: diff changeset	584 nm->cleanup_inline_caches();
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	585 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	586 }
12324 510fbd28919c 8020151: PSR:PERF Large performance regressions when code cache is filled anoll parents: 12266 diff changeset	587 return freed_memory;
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	588 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	589
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	590 // Print out some state information about the current sweep and the
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	591 // state of the code cache if it's requested.
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	592 void NMethodSweeper::log_sweep(const char* msg, const char* format, ...) {
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	593 if (PrintMethodFlushing) {
2482 dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	594 stringStream s;
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	595 // Dump code cache state into a buffer before locking the tty,
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	596 // because log_state() will use locks causing lock conflicts.
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	597 CodeCache::log_state(&s);
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	598
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	599 ttyLocker ttyl;
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	600 tty->print("### sweeper: %s ", msg);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	601 if (format != NULL) {
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	602 va_list ap;
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	603 va_start(ap, format);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	604 tty->vprint(format, ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	605 va_end(ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	606 }
2482 dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	607 tty->print_cr(s.as_string());
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	608 }
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	609
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	610 if (LogCompilation && (xtty != NULL)) {
2482 dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	611 stringStream s;
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	612 // Dump code cache state into a buffer before locking the tty,
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	613 // because log_state() will use locks causing lock conflicts.
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	614 CodeCache::log_state(&s);
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	615
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	616 ttyLocker ttyl;
1646 8d5934a77f10 6968385: malformed xml in sweeper logging never parents: 1644 diff changeset	617 xtty->begin_elem("sweeper state='%s' traversals='" INTX_FORMAT "' ", msg, (intx)traversal_count());
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	618 if (format != NULL) {
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	619 va_list ap;
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	620 va_start(ap, format);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	621 xtty->vprint(format, ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	622 va_end(ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	623 }
2482 dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	624 xtty->print(s.as_string());
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	625 xtty->stamp();
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	626 xtty->end_elem();
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	627 }
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	628 }

Mercurial > hg > graal-compiler

annotate src/share/vm/runtime/sweeper.cpp @ 13074:78da3894b86f