memprofiler.cpp revision 1410:f03d0a26bf83 
1/*
2 * Copyright 1998-2009 Sun Microsystems, Inc.  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 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
33class MemProfilerTask : public PeriodicTask {
34 public:
35  MemProfilerTask(int interval_time) : PeriodicTask(interval_time) {}
36  void task();
37};
38
39
40void 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
50MemProfilerTask* MemProfiler::_task   = NULL;
51FILE*            MemProfiler::_log_fp = NULL;
52
53
54bool MemProfiler::is_active() {
55  return _task != NULL;
56}
57
58
59void 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      fatal(err_msg("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
78void 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
95void 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
107  fprintf(_log_fp, "%6.1f,%5d,%5d," UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ","
108          UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",",
109          os::elapsedTime(),
110          Threads::number_of_threads(),
111          SystemDictionary::number_of_classes(),
112          Universe::heap()->used() / K,
113          Universe::heap()->capacity() / K,
114          Universe::heap()->permanent_used() / HWperKB,
115          Universe::heap()->permanent_capacity() / HWperKB);
116
117  fprintf(_log_fp, UINTX_FORMAT_W(6) ",", CodeCache::capacity() / K);
118
119  fprintf(_log_fp, UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",%6ld\n",
120          handles_memory_usage / K,
121          resource_memory_usage / K,
122          OopMapCache::memory_usage() / K);
123  fflush(_log_fp);
124}
125
126#endif
127