memprofiler.cpp revision 8413:92457dfb91bd
1/* 2 * Copyright (c) 1998, 2015, Oracle and/or its affiliates. All rights reserved. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25#include "precompiled.hpp" 26#include "classfile/systemDictionary.hpp" 27#include "code/codeCache.hpp" 28#include "gc/shared/collectedHeap.inline.hpp" 29#include "gc/shared/generation.hpp" 30#include "interpreter/oopMapCache.hpp" 31#include "memory/resourceArea.hpp" 32#include "runtime/handles.inline.hpp" 33#include "runtime/jniHandles.hpp" 34#include "runtime/memprofiler.hpp" 35#include "runtime/mutexLocker.hpp" 36#include "runtime/os.hpp" 37#include "runtime/task.hpp" 38#include "runtime/thread.inline.hpp" 39#include "runtime/vmThread.hpp" 40 41#ifndef PRODUCT 42 43// -------------------------------------------------------- 44// MemProfilerTask 45 46class MemProfilerTask : public PeriodicTask { 47 public: 48 MemProfilerTask(int interval_time) : PeriodicTask(interval_time) {} 49 void task(); 50}; 51 52 53void MemProfilerTask::task() { 54 // Get thread lock to provide mutual exclusion, and so we can iterate safely over the thread list. 55 MutexLocker mu(Threads_lock); 56 MemProfiler::do_trace(); 57} 58 59 60//---------------------------------------------------------- 61// Implementation of MemProfiler 62 63MemProfilerTask* MemProfiler::_task = NULL; 64FILE* MemProfiler::_log_fp = NULL; 65 66 67bool MemProfiler::is_active() { 68 return _task != NULL; 69} 70 71 72void MemProfiler::engage() { 73 const char *log_name = "mprofile.log"; 74 if (!is_active()) { 75 // Create log file 76 _log_fp = fopen(log_name , "w+"); 77 if (_log_fp == NULL) { 78 fatal(err_msg("MemProfiler: Cannot create log file: %s", log_name)); 79 } 80 fprintf(_log_fp, "MemProfiler: sizes are in Kb, time is in seconds since startup\n\n"); 81 fprintf(_log_fp, " time, #thr, #cls, heap, heap, perm, perm, code, hndls, rescs, oopmp\n"); 82 fprintf(_log_fp, " used, total, used, total, total, total, total, total\n"); 83 fprintf(_log_fp, "--------------------------------------------------------------------------\n"); 84 85 _task = new MemProfilerTask(MemProfilingInterval); 86 _task->enroll(); 87 } 88} 89 90 91void MemProfiler::disengage() { 92 if (!is_active()) return; 93 // Do one last trace at disengage time 94 do_trace(); 95 96 // Close logfile 97 fprintf(_log_fp, "MemProfiler detached\n"); 98 fclose(_log_fp); 99 100 // remove MemProfilerTask 101 assert(_task != NULL, "sanity check"); 102 _task->disenroll(); 103 delete _task; 104 _task = NULL; 105} 106 107 108void MemProfiler::do_trace() { 109 // Calculate thread local sizes 110 size_t handles_memory_usage = VMThread::vm_thread()->handle_area()->size_in_bytes(); 111 size_t resource_memory_usage = VMThread::vm_thread()->resource_area()->size_in_bytes(); 112 JavaThread *cur = Threads::first(); 113 while (cur != NULL) { 114 handles_memory_usage += cur->handle_area()->size_in_bytes(); 115 resource_memory_usage += cur->resource_area()->size_in_bytes(); 116 cur = cur->next(); 117 } 118 119 // Print trace line in log 120 fprintf(_log_fp, "%6.1f,%5d,%5d," UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",", 121 os::elapsedTime(), 122 Threads::number_of_threads(), 123 SystemDictionary::number_of_classes(), 124 Universe::heap()->used() / K, 125 Universe::heap()->capacity() / K); 126 127 fprintf(_log_fp, UINTX_FORMAT_W(6) ",", CodeCache::capacity() / K); 128 129 fprintf(_log_fp, UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",%6ld\n", 130 handles_memory_usage / K, 131 resource_memory_usage / K, 132 OopMapCache::memory_usage() / K); 133 fflush(_log_fp); 134} 135 136#endif 137