1 /* 2 * Copyright (c) 1998, 2017, 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/threadSMR.hpp" 40 #include "runtime/vmThread.hpp" 41 42 #ifndef PRODUCT 43 44 // -------------------------------------------------------- 45 // MemProfilerTask 46 47 class MemProfilerTask : public PeriodicTask { 48 public: 49 MemProfilerTask(int interval_time) : PeriodicTask(interval_time) {} 50 void task(); 51 }; 52 53 54 void MemProfilerTask::task() { 55 // Get thread lock to provide mutual exclusion, and so we can iterate safely over the thread list. 56 MutexLocker mu(Threads_lock); 57 MemProfiler::do_trace(); 58 } 59 60 61 //---------------------------------------------------------- 62 // Implementation of MemProfiler 63 64 MemProfilerTask* MemProfiler::_task = NULL; 65 FILE* MemProfiler::_log_fp = NULL; 66 67 68 bool MemProfiler::is_active() { 69 return _task != NULL; 70 } 71 72 73 void MemProfiler::engage() { 74 const char *log_name = "mprofile.log"; 75 if (!is_active()) { 76 // Create log file 77 _log_fp = fopen(log_name , "w+"); 78 if (_log_fp == NULL) { 79 fatal("MemProfiler: Cannot create log file: %s", log_name); 80 } 81 fprintf(_log_fp, "MemProfiler: sizes are in Kb, time is in seconds since startup\n\n"); 82 fprintf(_log_fp, " time, #thr, #cls, heap, heap, perm, perm, code, hndls, rescs, oopmp\n"); 83 fprintf(_log_fp, " used, total, used, total, total, total, total, total\n"); 84 fprintf(_log_fp, "--------------------------------------------------------------------------\n"); 85 86 _task = new MemProfilerTask(MemProfilingInterval); 87 _task->enroll(); 88 } 89 } 90 91 92 void MemProfiler::disengage() { 93 if (!is_active()) return; 94 // Do one last trace at disengage time 95 do_trace(); 96 97 // Close logfile 98 fprintf(_log_fp, "MemProfiler detached\n"); 99 fclose(_log_fp); 100 101 // remove MemProfilerTask 102 assert(_task != NULL, "sanity check"); 103 _task->disenroll(); 104 delete _task; 105 _task = NULL; 106 } 107 108 109 void MemProfiler::do_trace() { 110 // Calculate thread local sizes 111 size_t handles_memory_usage = VMThread::vm_thread()->handle_area()->size_in_bytes(); 112 size_t resource_memory_usage = VMThread::vm_thread()->resource_area()->size_in_bytes(); 113 { 114 JavaThreadIteratorWithHandle jtiwh; 115 for (; JavaThread *cur = jtiwh.next(); ) { 116 handles_memory_usage += cur->handle_area()->size_in_bytes(); 117 resource_memory_usage += cur->resource_area()->size_in_bytes(); 118 } 119 120 // Print trace line in log 121 fprintf(_log_fp, "%6.1f,%5d,%5d," UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",", 122 os::elapsedTime(), 123 jtiwh.length(), 124 InstanceKlass::number_of_instance_classes(), 125 Universe::heap()->used() / K, 126 Universe::heap()->capacity() / K); 127 } 128 129 fprintf(_log_fp, UINTX_FORMAT_W(6) ",", CodeCache::capacity() / K); 130 131 fprintf(_log_fp, UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",%6ld\n", 132 handles_memory_usage / K, 133 resource_memory_usage / K, 134 0L); 135 fflush(_log_fp); 136 } 137 138 #endif