memprofiler.cpp revision 3602:da91efe96a93 
1/*
2 * Copyright (c) 1998, 2012, 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_interface/collectedHeap.inline.hpp"
29#include "interpreter/oopMapCache.hpp"
30#include "memory/generation.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/vmThread.hpp"
39#ifdef TARGET_OS_FAMILY_linux
40# include "thread_linux.inline.hpp"
41#endif
42#ifdef TARGET_OS_FAMILY_solaris
43# include "thread_solaris.inline.hpp"
44#endif
45#ifdef TARGET_OS_FAMILY_windows
46# include "thread_windows.inline.hpp"
47#endif
48#ifdef TARGET_OS_FAMILY_bsd
49# include "thread_bsd.inline.hpp"
50#endif
51
52#ifndef PRODUCT
53
54// --------------------------------------------------------
55// MemProfilerTask
56
57class MemProfilerTask : public PeriodicTask {
58 public:
59  MemProfilerTask(int interval_time) : PeriodicTask(interval_time) {}
60  void task();
61};
62
63
64void MemProfilerTask::task() {
65  // Get thread lock to provide mutual exclusion, and so we can iterate safely over the thread list.
66  MutexLocker mu(Threads_lock);
67  MemProfiler::do_trace();
68}
69
70
71//----------------------------------------------------------
72// Implementation of MemProfiler
73
74MemProfilerTask* MemProfiler::_task   = NULL;
75FILE*            MemProfiler::_log_fp = NULL;
76
77
78bool MemProfiler::is_active() {
79  return _task != NULL;
80}
81
82
83void MemProfiler::engage() {
84  const char *log_name = "mprofile.log";
85  if (!is_active()) {
86    // Create log file
87    _log_fp = fopen(log_name , "w+");
88    if (_log_fp == NULL) {
89      fatal(err_msg("MemProfiler: Cannot create log file: %s", log_name));
90    }
91    fprintf(_log_fp, "MemProfiler: sizes are in Kb, time is in seconds since startup\n\n");
92    fprintf(_log_fp, "  time, #thr, #cls,  heap,  heap,  perm,  perm,  code, hndls, rescs, oopmp\n");
93    fprintf(_log_fp, "                     used, total,  used, total, total, total, total, total\n");
94    fprintf(_log_fp, "--------------------------------------------------------------------------\n");
95
96    _task = new MemProfilerTask(MemProfilingInterval);
97    _task->enroll();
98  }
99}
100
101
102void MemProfiler::disengage() {
103  if (!is_active()) return;
104  // Do one last trace at disengage time
105  do_trace();
106
107  // Close logfile
108  fprintf(_log_fp, "MemProfiler detached\n");
109  fclose(_log_fp);
110
111  // remove MemProfilerTask
112  assert(_task != NULL, "sanity check");
113  _task->disenroll();
114  delete _task;
115  _task = NULL;
116}
117
118
119void MemProfiler::do_trace() {
120  // Calculate thread local sizes
121  size_t handles_memory_usage    = VMThread::vm_thread()->handle_area()->size_in_bytes();
122  size_t resource_memory_usage   = VMThread::vm_thread()->resource_area()->size_in_bytes();
123  JavaThread *cur = Threads::first();
124  while (cur != NULL) {
125    handles_memory_usage  += cur->handle_area()->size_in_bytes();
126    resource_memory_usage += cur->resource_area()->size_in_bytes();
127    cur = cur->next();
128  }
129
130  // Print trace line in log
131  fprintf(_log_fp, "%6.1f,%5d,%5d," UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",",
132          os::elapsedTime(),
133          Threads::number_of_threads(),
134          SystemDictionary::number_of_classes(),
135          Universe::heap()->used() / K,
136          Universe::heap()->capacity() / K);
137
138  fprintf(_log_fp, UINTX_FORMAT_W(6) ",", CodeCache::capacity() / K);
139
140  fprintf(_log_fp, UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",%6ld\n",
141          handles_memory_usage / K,
142          resource_memory_usage / K,
143          OopMapCache::memory_usage() / K);
144  fflush(_log_fp);
145}
146
147#endif
148