Mercurial > hg > truffle
annotate src/share/vm/runtime/memprofiler.cpp @ 9126:bc26f978b0ce
HotSpotResolvedObjectType: implement hasFinalizeSubclass() correctly
don't use the (wrong) cached value, but ask the runtime on each request.
Fixes regression on xml.* benchmarks @ specjvm2008. The problem was:
After the constructor of Object was deoptimized due to an assumption violation,
it was recompiled again after some time. However, on recompilation, the value
of hasFinalizeSubclass for the class was not updated and it was compiled again
with a, now wrong, assumption, which then triggers deoptimization again.
This was repeated until it hit the recompilation limit (defined by
PerMethodRecompilationCutoff), and therefore only executed by the interpreter
from now on, causing the performance regression.
author | Bernhard Urban <bernhard.urban@jku.at> |
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date | Mon, 15 Apr 2013 19:54:58 +0200 |
parents | f34d701e952e |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 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" | |
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38 #include "runtime/thread.inline.hpp" |
1972 | 39 #include "runtime/vmThread.hpp" |
0 | 40 |
41 #ifndef PRODUCT | |
42 | |
43 // -------------------------------------------------------- | |
44 // MemProfilerTask | |
45 | |
46 class MemProfilerTask : public PeriodicTask { | |
47 public: | |
48 MemProfilerTask(int interval_time) : PeriodicTask(interval_time) {} | |
49 void task(); | |
50 }; | |
51 | |
52 | |
53 void 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 | |
63 MemProfilerTask* MemProfiler::_task = NULL; | |
64 FILE* MemProfiler::_log_fp = NULL; | |
65 | |
66 | |
67 bool MemProfiler::is_active() { | |
68 return _task != NULL; | |
69 } | |
70 | |
71 | |
72 void 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) { | |
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78 fatal(err_msg("MemProfiler: Cannot create log file: %s", log_name)); |
0 | 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 | |
91 void 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 | |
108 void 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 | |
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120 fprintf(_log_fp, "%6.1f,%5d,%5d," UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",", |
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121 os::elapsedTime(), |
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122 Threads::number_of_threads(), |
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123 SystemDictionary::number_of_classes(), |
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124 Universe::heap()->used() / K, |
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125 Universe::heap()->capacity() / K); |
0 | 126 |
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127 fprintf(_log_fp, UINTX_FORMAT_W(6) ",", CodeCache::capacity() / K); |
0 | 128 |
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129 fprintf(_log_fp, UINTX_FORMAT_W(6) "," UINTX_FORMAT_W(6) ",%6ld\n", |
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130 handles_memory_usage / K, |
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131 resource_memory_usage / K, |
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132 OopMapCache::memory_usage() / K); |
0 | 133 fflush(_log_fp); |
134 } | |
135 | |
136 #endif |