truffle: src/share/vm/runtime/sweeper.cpp annotate

annotate src/share/vm/runtime/sweeper.cpp @ 10206:0cfa93c2fcc4

8012547: Code cache flushing can get stuck reclaming of memory Summary: Keep sweeping regardless of if we are flushing Reviewed-by: kvn, twisti

author	neliasso
date	Mon, 29 Apr 2013 13:20:19 +0200
parents	da91efe96a93
children	f2110083203d

rev	line source
0 a61af66fc99e Initial load duke parents: diff changeset	1 /*
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
0 a61af66fc99e Initial load duke parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
a61af66fc99e Initial load duke parents: diff changeset	4 *
a61af66fc99e Initial load duke parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
a61af66fc99e Initial load duke parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
a61af66fc99e Initial load duke parents: diff changeset	7 * published by the Free Software Foundation.
a61af66fc99e Initial load duke parents: diff changeset	8 *
a61af66fc99e Initial load duke parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
a61af66fc99e Initial load duke parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
a61af66fc99e Initial load duke parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
a61af66fc99e Initial load duke parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
a61af66fc99e Initial load duke parents: diff changeset	13 * accompanied this code).
a61af66fc99e Initial load duke parents: diff changeset	14 *
a61af66fc99e Initial load duke parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
a61af66fc99e Initial load duke parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
a61af66fc99e Initial load duke parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
a61af66fc99e Initial load duke parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 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"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	39 #include "utilities/events.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1783 diff changeset	40 #include "utilities/xmlstream.hpp"
0 a61af66fc99e Initial load duke parents: diff changeset	41
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	42 #ifdef ASSERT
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	43
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	44 #define SWEEP(nm) record_sweep(nm, __LINE__)
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	45 // Sweeper logging code
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	46 class SweeperRecord {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	47 public:
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	48 int traversal;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	49 int invocation;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	50 int compile_id;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	51 long traversal_mark;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	52 int state;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	53 const char* kind;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	54 address vep;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	55 address uep;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	56 int line;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	57
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	58 void print() {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	59 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	60 PTR_FORMAT " state = %d traversal_mark %d line = %d",
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	61 traversal,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	62 invocation,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	63 compile_id,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	64 kind == NULL ? "" : kind,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	65 uep,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	66 vep,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	67 state,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	68 traversal_mark,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	69 line);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	70 }
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 static int _sweep_index = 0;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	74 static SweeperRecord* _records = NULL;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	75
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	76 void NMethodSweeper::report_events(int id, address entry) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	77 if (_records != NULL) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	78 for (int i = _sweep_index; i < SweeperLogEntries; i++) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	79 if (_records[i].uep == entry \|\|
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	80 _records[i].vep == entry \|\|
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	81 _records[i].compile_id == id) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	82 _records[i].print();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	83 }
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 for (int i = 0; i < _sweep_index; i++) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	86 if (_records[i].uep == entry \|\|
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	87 _records[i].vep == entry \|\|
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	88 _records[i].compile_id == id) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	89 _records[i].print();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	90 }
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 void NMethodSweeper::report_events() {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	96 if (_records != NULL) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	97 for (int i = _sweep_index; i < SweeperLogEntries; i++) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	98 // skip empty records
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	99 if (_records[i].vep == NULL) continue;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	100 _records[i].print();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	101 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	102 for (int i = 0; i < _sweep_index; i++) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	103 // skip empty records
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	104 if (_records[i].vep == NULL) continue;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	105 _records[i].print();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	106 }
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 void NMethodSweeper::record_sweep(nmethod* nm, int line) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	111 if (_records != NULL) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	112 _records[_sweep_index].traversal = _traversals;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	113 _records[_sweep_index].traversal_mark = nm->_stack_traversal_mark;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	114 _records[_sweep_index].invocation = _invocations;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	115 _records[_sweep_index].compile_id = nm->compile_id();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	116 _records[_sweep_index].kind = nm->compile_kind();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	117 _records[_sweep_index].state = nm->_state;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	118 _records[_sweep_index].vep = nm->verified_entry_point();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	119 _records[_sweep_index].uep = nm->entry_point();
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	120 _records[_sweep_index].line = line;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	121
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
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	129
0 a61af66fc99e Initial load duke parents: diff changeset	130 long NMethodSweeper::_traversals = 0; // No. of stack traversals performed
1615 ff38d05ea86f 6956958: assert(is_clean() \|\| is_call_to_compiled() \|\| is_call_to_interpreted() \|\| is_optimized() \|\| is_megam never parents: 1552 diff changeset	131 nmethod* NMethodSweeper::_current = NULL; // Current nmethod
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	132 int NMethodSweeper::_seen = 0 ; // No. of nmethods we have currently processed in current pass of CodeCache
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	133
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	134 volatile int NMethodSweeper::_invocations = 0; // No. of invocations left until we are completed with this pass
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	135 volatile int NMethodSweeper::_sweep_started = 0; // Whether a sweep is in progress.
0 a61af66fc99e Initial load duke parents: diff changeset	136
a61af66fc99e Initial load duke parents: diff changeset	137 jint NMethodSweeper::_locked_seen = 0;
a61af66fc99e Initial load duke parents: diff changeset	138 jint NMethodSweeper::_not_entrant_seen_on_stack = 0;
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	139 bool NMethodSweeper::_resweep = false;
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	140 jint NMethodSweeper::_flush_token = 0;
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	141 jlong NMethodSweeper::_last_full_flush_time = 0;
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	142 int NMethodSweeper::_highest_marked = 0;
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	143 int NMethodSweeper::_dead_compile_ids = 0;
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	144 long NMethodSweeper::_last_flush_traversal_id = 0;
0 a61af66fc99e Initial load duke parents: diff changeset	145
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	146 class MarkActivationClosure: public CodeBlobClosure {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	147 public:
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	148 virtual void do_code_blob(CodeBlob* cb) {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	149 // If we see an activation belonging to a non_entrant nmethod, we mark it.
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	150 if (cb->is_nmethod() && ((nmethod*)cb)->is_not_entrant()) {
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	151 ((nmethod*)cb)->mark_as_seen_on_stack();
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	152 }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	153 }
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	154 };
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	155 static MarkActivationClosure mark_activation_closure;
148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	156
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	157 bool NMethodSweeper::sweep_in_progress() {
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	158 return (_current != NULL);
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	159 }
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	160
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	161 void NMethodSweeper::scan_stacks() {
0 a61af66fc99e Initial load duke parents: diff changeset	162 assert(SafepointSynchronize::is_at_safepoint(), "must be executed at a safepoint");
a61af66fc99e Initial load duke parents: diff changeset	163 if (!MethodFlushing) return;
a61af66fc99e Initial load duke parents: diff changeset	164
a61af66fc99e Initial load duke parents: diff changeset	165 // No need to synchronize access, since this is always executed at a
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	166 // safepoint.
0 a61af66fc99e Initial load duke parents: diff changeset	167
a61af66fc99e Initial load duke parents: diff changeset	168 // Make sure CompiledIC_lock in unlocked, since we might update some
a61af66fc99e Initial load duke parents: diff changeset	169 // inline caches. If it is, we just bail-out and try later.
a61af66fc99e Initial load duke parents: diff changeset	170 if (CompiledIC_lock->is_locked() \|\| Patching_lock->is_locked()) return;
a61af66fc99e Initial load duke parents: diff changeset	171
a61af66fc99e Initial load duke parents: diff changeset	172 // Check for restart
a61af66fc99e Initial load duke parents: diff changeset	173 assert(CodeCache::find_blob_unsafe(_current) == _current, "Sweeper nmethod cached state invalid");
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	174 if (!sweep_in_progress() && _resweep) {
0 a61af66fc99e Initial load duke parents: diff changeset	175 _seen = 0;
a61af66fc99e Initial load duke parents: diff changeset	176 _invocations = NmethodSweepFraction;
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	177 _current = CodeCache::first_nmethod();
0 a61af66fc99e Initial load duke parents: diff changeset	178 _traversals += 1;
a61af66fc99e Initial load duke parents: diff changeset	179 if (PrintMethodFlushing) {
a61af66fc99e Initial load duke parents: diff changeset	180 tty->print_cr("### Sweep: stack traversal %d", _traversals);
a61af66fc99e Initial load duke parents: diff changeset	181 }
989 148e5441d916 6863023: need non-perm oops in code cache for JSR 292 jrose parents: 0 diff changeset	182 Threads::nmethods_do(&mark_activation_closure);
0 a61af66fc99e Initial load duke parents: diff changeset	183
a61af66fc99e Initial load duke parents: diff changeset	184 // reset the flags since we started a scan from the beginning.
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	185 _resweep = false;
0 a61af66fc99e Initial load duke parents: diff changeset	186 _locked_seen = 0;
a61af66fc99e Initial load duke parents: diff changeset	187 _not_entrant_seen_on_stack = 0;
a61af66fc99e Initial load duke parents: diff changeset	188 }
a61af66fc99e Initial load duke parents: diff changeset	189
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	190 if (UseCodeCacheFlushing) {
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	191 // only allow new flushes after the interval is complete.
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	192 jlong now = os::javaTimeMillis();
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	193 jlong max_interval = (jlong)MinCodeCacheFlushingInterval * (jlong)1000;
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	194 jlong curr_interval = now - _last_full_flush_time;
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	195 if (curr_interval > max_interval) {
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	196 _flush_token = 0;
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	197 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	198
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	199 if (!CodeCache::needs_flushing() && !CompileBroker::should_compile_new_jobs()) {
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	200 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	201 log_sweep("restart_compiler");
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	202 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	203 }
0 a61af66fc99e Initial load duke parents: diff changeset	204 }
a61af66fc99e Initial load duke parents: diff changeset	205
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	206 void NMethodSweeper::possibly_sweep() {
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	207 assert(JavaThread::current()->thread_state() == _thread_in_vm, "must run in vm mode");
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	208 if (!MethodFlushing \|\| !sweep_in_progress()) return;
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	209
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	210 if (_invocations > 0) {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	211 // Only one thread at a time will sweep
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	212 jint old = Atomic::cmpxchg( 1, &_sweep_started, 0 );
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	213 if (old != 0) {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	214 return;
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	215 }
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	216 #ifdef ASSERT
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	217 if (LogSweeper && _records == NULL) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	218 // Create the ring buffer for the logging code
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 4945 diff changeset	219 _records = NEW_C_HEAP_ARRAY(SweeperRecord, SweeperLogEntries, mtGC);
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	220 memset(_records, 0, sizeof(SweeperRecord) * SweeperLogEntries);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	221 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	222 #endif
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	223 if (_invocations > 0) {
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	224 sweep_code_cache();
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	225 _invocations--;
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	226 }
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	227 _sweep_started = 0;
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	228 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	229 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	230
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	231 void NMethodSweeper::sweep_code_cache() {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	232 #ifdef ASSERT
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	233 jlong sweep_start;
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	234 if (PrintMethodFlushing) {
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	235 sweep_start = os::javaTimeMillis();
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	236 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	237 #endif
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	238 if (PrintMethodFlushing && Verbose) {
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	239 tty->print_cr("### Sweep at %d out of %d. Invocations left: %d", _seen, CodeCache::nof_nmethods(), _invocations);
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	240 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	241
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	242 if (!CompileBroker::should_compile_new_jobs()) {
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	243 // 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	244 // in order to reach the clean state faster. Otherwise the sleeping compiler
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	245 // threads will slow down sweeping. After a few iterations the cache
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	246 // will be clean and sweeping stops (_resweep will not be set)
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	247 _invocations = 1;
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	248 }
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	249
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	250 // We want to visit all nmethods after NmethodSweepFraction
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	251 // 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	252 // 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	253 // 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	254 // stage must iterate until it there are no more nmethods.
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	255 int todo = (CodeCache::nof_nmethods() - _seen) / _invocations;
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	256
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	257 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	258 assert(!CodeCache_lock->owned_by_self(), "just checking");
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	259
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	260 {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	261 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	262
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	263 // The last invocation iterates until there are no more nmethods
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	264 for (int i = 0; (i < todo \|\| _invocations == 1) && _current != NULL; i++) {
4945 cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	265 if (SafepointSynchronize::is_synchronizing()) { // Safepoint request
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	266 if (PrintMethodFlushing && Verbose) {
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	267 tty->print_cr("### Sweep at %d out of %d, invocation: %d, yielding to safepoint", _seen, CodeCache::nof_nmethods(), _invocations);
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	268 }
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	269 MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	270
4945 cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	271 assert(Thread::current()->is_Java_thread(), "should be java thread");
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	272 JavaThread* thread = (JavaThread*)Thread::current();
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	273 ThreadBlockInVM tbivm(thread);
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	274 thread->java_suspend_self();
cfdfbeac0a5b 7145345: Code cache sweeper must cooperate with safepoints iveresov parents: 3384 diff changeset	275 }
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	276 // 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	277 // 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	278 // 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	279 nmethod* next = CodeCache::next_nmethod(_current);
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	280
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	281 // Now ready to process nmethod and give up CodeCache_lock
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	282 {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	283 MutexUnlockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag);
1615 ff38d05ea86f 6956958: assert(is_clean() \|\| is_call_to_compiled() \|\| is_call_to_interpreted() \|\| is_optimized() \|\| is_megam never parents: 1552 diff changeset	284 process_nmethod(_current);
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	285 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	286 _seen++;
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	287 _current = next;
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	288 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	289 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	290
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	291 assert(_invocations > 1 \|\| _current == NULL, "must have scanned the whole cache");
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	292
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	293 if (!sweep_in_progress() && !_resweep && (_locked_seen \|\| _not_entrant_seen_on_stack)) {
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	294 // we've completed a scan without making progress but there were
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	295 // nmethods we were unable to process either because they were
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	296 // locked or were still on stack. We don't have to aggresively
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	297 // clean them up so just stop scanning. We could scan once more
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	298 // but that complicates the control logic and it's unlikely to
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	299 // matter much.
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	300 if (PrintMethodFlushing) {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	301 tty->print_cr("### Couldn't make progress on some nmethods so stopping sweep");
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
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	305 #ifdef ASSERT
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	306 if(PrintMethodFlushing) {
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	307 jlong sweep_end = os::javaTimeMillis();
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	308 tty->print_cr("### sweeper: sweep time(%d): " INT64_FORMAT, _invocations, sweep_end - sweep_start);
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	309 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	310 #endif
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	311
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	312 if (_invocations == 1) {
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	313 log_sweep("finished");
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	314 }
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	315
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	316 // Sweeper is the only case where memory is released,
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	317 // check here if it is time to restart the compiler.
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	318 if (UseCodeCacheFlushing && !CompileBroker::should_compile_new_jobs() && !CodeCache::needs_flushing()) {
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	319 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	320 log_sweep("restart_compiler");
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	321 }
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	322 }
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	323
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	324 class NMethodMarker: public StackObj {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	325 private:
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	326 CompilerThread* _thread;
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	327 public:
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	328 NMethodMarker(nmethod* nm) {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	329 _thread = CompilerThread::current();
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	330 if (!nm->is_zombie() && !nm->is_unloaded()) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	331 // Only expose live nmethods for scanning
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	332 _thread->set_scanned_nmethod(nm);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	333 }
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	334 }
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	335 ~NMethodMarker() {
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	336 _thread->set_scanned_nmethod(NULL);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	337 }
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	338 };
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	339
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	340 void NMethodSweeper::release_nmethod(nmethod *nm) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	341 // Clean up any CompiledICHolders
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	342 {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	343 ResourceMark rm;
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	344 MutexLocker ml_patch(CompiledIC_lock);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	345 RelocIterator iter(nm);
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	346 while (iter.next()) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	347 if (iter.type() == relocInfo::virtual_call_type) {
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	348 CompiledIC::cleanup_call_site(iter.virtual_call_reloc());
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	349 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	350 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	351 }
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	352
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	353 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	354 nm->flush();
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	355 }
0 a61af66fc99e Initial load duke parents: diff changeset	356
a61af66fc99e Initial load duke parents: diff changeset	357 void NMethodSweeper::process_nmethod(nmethod *nm) {
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	358 assert(!CodeCache_lock->owned_by_self(), "just checking");
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	359
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	360 // Make sure this nmethod doesn't get unloaded during the scan,
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	361 // since the locks acquired below might safepoint.
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	362 NMethodMarker nmm(nm);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	363
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	364 SWEEP(nm);
f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	365
0 a61af66fc99e Initial load duke parents: diff changeset	366 // Skip methods that are currently referenced by the VM
a61af66fc99e Initial load duke parents: diff changeset	367 if (nm->is_locked_by_vm()) {
a61af66fc99e Initial load duke parents: diff changeset	368 // But still remember to clean-up inline caches for alive nmethods
a61af66fc99e Initial load duke parents: diff changeset	369 if (nm->is_alive()) {
a61af66fc99e Initial load duke parents: diff changeset	370 // Clean-up all inline caches that points to zombie/non-reentrant methods
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	371 MutexLocker cl(CompiledIC_lock);
0 a61af66fc99e Initial load duke parents: diff changeset	372 nm->cleanup_inline_caches();
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	373 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	374 } else {
a61af66fc99e Initial load duke parents: diff changeset	375 _locked_seen++;
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	376 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	377 }
a61af66fc99e Initial load duke parents: diff changeset	378 return;
a61af66fc99e Initial load duke parents: diff changeset	379 }
a61af66fc99e Initial load duke parents: diff changeset	380
a61af66fc99e Initial load duke parents: diff changeset	381 if (nm->is_zombie()) {
a61af66fc99e Initial load duke parents: diff changeset	382 // If it is first time, we see nmethod then we mark it. Otherwise,
a61af66fc99e Initial load duke parents: diff changeset	383 // we reclame 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	384 // there are no inline caches that refer to it.
0 a61af66fc99e Initial load duke parents: diff changeset	385 if (nm->is_marked_for_reclamation()) {
a61af66fc99e Initial load duke parents: diff changeset	386 assert(!nm->is_locked_by_vm(), "must not flush locked nmethods");
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	387 if (PrintMethodFlushing && Verbose) {
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	388 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	389 }
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	390 release_nmethod(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	391 } else {
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	392 if (PrintMethodFlushing && Verbose) {
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	393 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	394 }
0 a61af66fc99e Initial load duke parents: diff changeset	395 nm->mark_for_reclamation();
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	396 _resweep = true;
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	397 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	398 }
a61af66fc99e Initial load duke parents: diff changeset	399 } else if (nm->is_not_entrant()) {
a61af66fc99e Initial load duke parents: diff changeset	400 // If there is no current activations of this method on the
a61af66fc99e Initial load duke parents: diff changeset	401 // stack we can safely convert it to a zombie method
a61af66fc99e Initial load duke parents: diff changeset	402 if (nm->can_not_entrant_be_converted()) {
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	403 if (PrintMethodFlushing && Verbose) {
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	404 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	405 }
0 a61af66fc99e Initial load duke parents: diff changeset	406 nm->make_zombie();
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	407 _resweep = true;
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	408 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	409 } else {
a61af66fc99e Initial load duke parents: diff changeset	410 // Still alive, clean up its inline caches
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	411 MutexLocker cl(CompiledIC_lock);
0 a61af66fc99e Initial load duke parents: diff changeset	412 nm->cleanup_inline_caches();
a61af66fc99e Initial load duke parents: diff changeset	413 // we coudn't transition this nmethod so don't immediately
a61af66fc99e Initial load duke parents: diff changeset	414 // request a rescan. If this method stays on the stack for a
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	415 // long time we don't want to keep rescanning the code cache.
0 a61af66fc99e Initial load duke parents: diff changeset	416 _not_entrant_seen_on_stack++;
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	417 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	418 }
a61af66fc99e Initial load duke parents: diff changeset	419 } else if (nm->is_unloaded()) {
a61af66fc99e Initial load duke parents: diff changeset	420 // Unloaded code, just make it a zombie
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	421 if (PrintMethodFlushing && Verbose)
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	422 tty->print_cr("### Nmethod %3d/" PTR_FORMAT " (unloaded) being made zombie", nm->compile_id(), nm);
941 8b46c4d82093 4957990: Perm heap bloat in JVM ysr parents: 0 diff changeset	423 if (nm->is_osr_method()) {
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	424 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	425 // No inline caches will ever point to osr methods, so we can just remove it
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	426 release_nmethod(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	427 } else {
a61af66fc99e Initial load duke parents: diff changeset	428 nm->make_zombie();
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	429 _resweep = true;
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	430 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	431 }
a61af66fc99e Initial load duke parents: diff changeset	432 } else {
a61af66fc99e Initial load duke parents: diff changeset	433 assert(nm->is_alive(), "should be alive");
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	434
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	435 if (UseCodeCacheFlushing) {
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	436 if (nm->is_speculatively_disconnected() && !nm->is_locked_by_vm() && !nm->is_osr_method() &&
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	437 (_traversals > _last_flush_traversal_id + 2) && (nm->compile_id() < _highest_marked)) {
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	438 // This method has not been called since the forced cleanup happened
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	439 nm->make_not_entrant();
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	440 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	441 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	442
0 a61af66fc99e Initial load duke parents: diff changeset	443 // Clean-up all inline caches that points to zombie/non-reentrant methods
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	444 MutexLocker cl(CompiledIC_lock);
0 a61af66fc99e Initial load duke parents: diff changeset	445 nm->cleanup_inline_caches();
3384 f52ed367b66d 6996747: SIGSEGV in nmethod::cleanup_inline_caches / CompiledIC::verify never parents: 2482 diff changeset	446 SWEEP(nm);
0 a61af66fc99e Initial load duke parents: diff changeset	447 }
a61af66fc99e Initial load duke parents: diff changeset	448 }
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	449
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	450 // Code cache unloading: when compilers notice the code cache is getting full,
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	451 // they will call a vm op that comes here. This code attempts to speculatively
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	452 // unload the oldest half of the nmethods (based on the compile job id) by
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	453 // saving the old code in a list in the CodeCache. Then
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	454 // execution resumes. If a method so marked is not called by the second sweeper
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	455 // stack traversal after the current one, the nmethod will be marked non-entrant and
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	456 // got rid of by normal sweeping. If the method is called, the Method*'s
da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	457 // _code field is restored and the Method*/nmethod
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	458 // go back to their normal state.
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	459 void NMethodSweeper::handle_full_code_cache(bool is_full) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	460
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	461 if (is_full) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	462 // Since code cache is full, immediately stop new compiles
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	463 if (CompileBroker::set_should_compile_new_jobs(CompileBroker::stop_compilation)) {
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	464 log_sweep("disable_compiler");
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	465 }
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	466 }
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	467
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	468 // Make sure only one thread can flush
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	469 // The token is reset after CodeCacheMinimumFlushInterval in scan stacks,
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	470 // no need to check the timeout here.
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	471 jint old = Atomic::cmpxchg( 1, &_flush_token, 0 );
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	472 if (old != 0) {
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	473 return;
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	474 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	475
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	476 VM_HandleFullCodeCache op(is_full);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	477 VMThread::execute(&op);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	478
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	479 // resweep again as soon as possible
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	480 _resweep = true;
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	481 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	482
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	483 void NMethodSweeper::speculative_disconnect_nmethods(bool is_full) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	484 // If there was a race in detecting full code cache, only run
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	485 // one vm op for it or keep the compiler shut off
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	486
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	487 debug_only(jlong start = os::javaTimeMillis();)
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	488
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	489 // Traverse the code cache trying to dump the oldest nmethods
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	490 int curr_max_comp_id = CompileBroker::get_compilation_id();
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	491 int flush_target = ((curr_max_comp_id - _dead_compile_ids) / CodeCacheFlushingFraction) + _dead_compile_ids;
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	492
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	493 log_sweep("start_cleaning");
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	494
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	495 nmethod* nm = CodeCache::alive_nmethod(CodeCache::first());
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	496 jint disconnected = 0;
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	497 jint made_not_entrant = 0;
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	498 jint nmethod_count = 0;
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	499
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	500 while ((nm != NULL)){
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	501 int curr_comp_id = nm->compile_id();
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	502
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	503 // OSR methods cannot be flushed like this. Also, don't flush native methods
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	504 // since they are part of the JDK in most cases
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	505 if (!nm->is_osr_method() && !nm->is_locked_by_vm() && !nm->is_native_method()) {
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	506
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	507 // only count methods that can be speculatively disconnected
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	508 nmethod_count++;
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	509
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	510 if (nm->is_in_use() && (curr_comp_id < flush_target)) {
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	511 if ((nm->method()->code() == nm)) {
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	512 // This method has not been previously considered for
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	513 // unloading or it was restored already
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	514 CodeCache::speculatively_disconnect(nm);
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	515 disconnected++;
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	516 } else if (nm->is_speculatively_disconnected()) {
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	517 // This method was previously considered for preemptive unloading and was not called since then
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	518 CompilationPolicy::policy()->delay_compilation(nm->method());
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	519 nm->make_not_entrant();
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	520 made_not_entrant++;
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	521 }
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	522
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	523 if (curr_comp_id > _highest_marked) {
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	524 _highest_marked = curr_comp_id;
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	525 }
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	526 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	527 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	528 nm = CodeCache::alive_nmethod(CodeCache::next(nm));
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	529 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	530
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	531 // remember how many compile_ids wheren't seen last flush.
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	532 _dead_compile_ids = curr_max_comp_id - nmethod_count;
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	533
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	534 log_sweep("stop_cleaning",
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	535 "disconnected='" UINT32_FORMAT "' made_not_entrant='" UINT32_FORMAT "'",
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	536 disconnected, made_not_entrant);
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	537
1538 bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	538 // Shut off compiler. Sweeper will start over with a new stack scan and
bfe29ec02863 6950075: nmethod sweeper should operate concurrently never parents: 1202 diff changeset	539 // traversal cycle and turn it back on if it clears enough space.
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	540 if (is_full) {
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	541 _last_full_flush_time = os::javaTimeMillis();
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	542 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	543
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	544 // After two more traversals the sweeper will get rid of unrestored nmethods
10206 0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	545 _last_flush_traversal_id = _traversals;
0cfa93c2fcc4 8012547: Code cache flushing can get stuck reclaming of memory neliasso parents: 6725 diff changeset	546 _resweep = true;
1202 5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	547 #ifdef ASSERT
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	548 jlong end = os::javaTimeMillis();
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	549 if(PrintMethodFlushing && Verbose) {
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	550 tty->print_cr("### sweeper: unload time: " INT64_FORMAT, end-start);
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	551 }
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	552 #endif
5f24d0319e54 4360113: Evict nmethods when code cache gets full kvn parents: 1000 diff changeset	553 }
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	554
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	555
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	556 // 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	557 // state of the code cache if it's requested.
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	558 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	559 if (PrintMethodFlushing) {
2482 dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	560 stringStream s;
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	561 // 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	562 // 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	563 CodeCache::log_state(&s);
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	564
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	565 ttyLocker ttyl;
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	566 tty->print("### sweeper: %s ", msg);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	567 if (format != NULL) {
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	568 va_list ap;
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	569 va_start(ap, format);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	570 tty->vprint(format, ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	571 va_end(ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	572 }
2482 dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	573 tty->print_cr(s.as_string());
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	574 }
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	575
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	576 if (LogCompilation && (xtty != NULL)) {
2482 dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	577 stringStream s;
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	578 // 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	579 // 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	580 CodeCache::log_state(&s);
dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	581
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	582 ttyLocker ttyl;
1646 8d5934a77f10 6968385: malformed xml in sweeper logging never parents: 1644 diff changeset	583 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	584 if (format != NULL) {
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	585 va_list ap;
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	586 va_start(ap, format);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	587 xtty->vprint(format, ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	588 va_end(ap);
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	589 }
2482 dbccacb79c63 7036236: VM crashes assert((!inside_attrs()) \|\| is_error_reported()) failed ... iveresov parents: 2426 diff changeset	590 xtty->print(s.as_string());
1644 2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	591 xtty->stamp();
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	592 xtty->end_elem();
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	593 }
2a47bd84841f 6965184: possible races in make_not_entrant_or_zombie never parents: 1615 diff changeset	594 }

Mercurial > hg > truffle

annotate src/share/vm/runtime/sweeper.cpp @ 10206:0cfa93c2fcc4