Mercurial > hg > truffle
annotate src/share/vm/runtime/memprofiler.cpp @ 1145:e018e6884bd8
6631166: CMS: better heuristics when combatting fragmentation
Summary: Autonomic per-worker free block cache sizing, tunable coalition policies, fixes to per-size block statistics, retuned gain and bandwidth of some feedback loop filters to allow quicker reactivity to abrupt changes in ambient demand, and other heuristics to reduce fragmentation of the CMS old gen. Also tightened some assertions, including those related to locking.
Reviewed-by: jmasa
| author | ysr |
|---|---|
| date | Wed, 23 Dec 2009 09:23:54 -0800 |
| parents | 0fbdb4381b99 |
| children | f03d0a26bf83 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 579 | 2 * Copyright 1998-2009 Sun Microsystems, Inc. All Rights Reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 # include "incls/_precompiled.incl" | |
| 26 # include "incls/_memprofiler.cpp.incl" | |
| 27 | |
| 28 #ifndef PRODUCT | |
| 29 | |
| 30 // -------------------------------------------------------- | |
| 31 // MemProfilerTask | |
| 32 | |
| 33 class MemProfilerTask : public PeriodicTask { | |
| 34 public: | |
| 35 MemProfilerTask(int interval_time) : PeriodicTask(interval_time) {} | |
| 36 void task(); | |
| 37 }; | |
| 38 | |
| 39 | |
| 40 void MemProfilerTask::task() { | |
| 41 // Get thread lock to provide mutual exclusion, and so we can iterate safely over the thread list. | |
| 42 MutexLocker mu(Threads_lock); | |
| 43 MemProfiler::do_trace(); | |
| 44 } | |
| 45 | |
| 46 | |
| 47 //---------------------------------------------------------- | |
| 48 // Implementation of MemProfiler | |
| 49 | |
| 50 MemProfilerTask* MemProfiler::_task = NULL; | |
| 51 FILE* MemProfiler::_log_fp = NULL; | |
| 52 | |
| 53 | |
| 54 bool MemProfiler::is_active() { | |
| 55 return _task != NULL; | |
| 56 } | |
| 57 | |
| 58 | |
| 59 void MemProfiler::engage() { | |
| 60 const char *log_name = "mprofile.log"; | |
| 61 if (!is_active()) { | |
| 62 // Create log file | |
| 63 _log_fp = fopen(log_name , "w+"); | |
| 64 if (_log_fp == NULL) { | |
| 65 fatal1("MemProfiler: Cannot create log file: %s", log_name); | |
| 66 } | |
| 67 fprintf(_log_fp, "MemProfiler: sizes are in Kb, time is in seconds since startup\n\n"); | |
| 68 fprintf(_log_fp, " time, #thr, #cls, heap, heap, perm, perm, code, hndls, rescs, oopmp\n"); | |
| 69 fprintf(_log_fp, " used, total, used, total, total, total, total, total\n"); | |
| 70 fprintf(_log_fp, "--------------------------------------------------------------------------\n"); | |
| 71 | |
| 72 _task = new MemProfilerTask(MemProfilingInterval); | |
| 73 _task->enroll(); | |
| 74 } | |
| 75 } | |
| 76 | |
| 77 | |
| 78 void MemProfiler::disengage() { | |
| 79 if (!is_active()) return; | |
| 80 // Do one last trace at disengage time | |
| 81 do_trace(); | |
| 82 | |
| 83 // Close logfile | |
| 84 fprintf(_log_fp, "MemProfiler detached\n"); | |
| 85 fclose(_log_fp); | |
| 86 | |
| 87 // remove MemProfilerTask | |
| 88 assert(_task != NULL, "sanity check"); | |
| 89 _task->disenroll(); | |
| 90 delete _task; | |
| 91 _task = NULL; | |
| 92 } | |
| 93 | |
| 94 | |
| 95 void MemProfiler::do_trace() { | |
| 96 // Calculate thread local sizes | |
| 97 size_t handles_memory_usage = VMThread::vm_thread()->handle_area()->size_in_bytes(); | |
| 98 size_t resource_memory_usage = VMThread::vm_thread()->resource_area()->size_in_bytes(); | |
| 99 JavaThread *cur = Threads::first(); | |
| 100 while (cur != NULL) { | |
| 101 handles_memory_usage += cur->handle_area()->size_in_bytes(); | |
| 102 resource_memory_usage += cur->resource_area()->size_in_bytes(); | |
| 103 cur = cur->next(); | |
| 104 } | |
| 105 | |
| 106 // Print trace line in log | |
|
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107 fprintf(_log_fp, "%6.1f,%5d,%5d," UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) "," |
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108 UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",", |
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109 os::elapsedTime(), |
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110 Threads::number_of_threads(), |
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111 SystemDictionary::number_of_classes(), |
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112 Universe::heap()->used() / K, |
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113 Universe::heap()->capacity() / K, |
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114 Universe::heap()->permanent_used() / HWperKB, |
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115 Universe::heap()->permanent_capacity() / HWperKB); |
| 0 | 116 |
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117 fprintf(_log_fp, UINTX_FORMAT_W(6) ",", CodeCache::capacity() / K); |
| 0 | 118 |
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119 fprintf(_log_fp, UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",%6ld\n", |
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120 handles_memory_usage / K, |
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121 resource_memory_usage / K, |
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122 OopMapCache::memory_usage() / K); |
| 0 | 123 fflush(_log_fp); |
| 124 } | |
| 125 | |
| 126 #endif |