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src/share/vm/runtime/memprofiler.cpp@7ee622712fcf (annotated)

src/share/vm/runtime/memprofiler.cpp

Tue, 04 Mar 2008 09:44:24 -0500

author

sbohne

date

Tue, 04 Mar 2008 09:44:24 -0500

changeset 493

7ee622712fcf

parent 435

a61af66fc99e

child 948

2328d1d3f8cf

permissions

-rw-r--r--

6666698: EnableBiasedLocking with BiasedLockingStartupDelay can block Watcher thread
Summary: Enqueue VM_EnableBiasedLocking operation asynchronously
Reviewed-by: never, xlu, kbr, acorn

duke@435	1	/*
duke@435	2	* Copyright 1998-2007 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	# include "incls/_precompiled.incl"
duke@435	26	# include "incls/_memprofiler.cpp.incl"
duke@435	27
duke@435	28	#ifndef PRODUCT
duke@435	29
duke@435	30	// --------------------------------------------------------
duke@435	31	// MemProfilerTask
duke@435	32
duke@435	33	class MemProfilerTask : public PeriodicTask {
duke@435	34	public:
duke@435	35	MemProfilerTask(int interval_time) : PeriodicTask(interval_time) {}
duke@435	36	void task();
duke@435	37	};
duke@435	38
duke@435	39
duke@435	40	void MemProfilerTask::task() {
duke@435	41	// Get thread lock to provide mutual exclusion, and so we can iterate safely over the thread list.
duke@435	42	MutexLocker mu(Threads_lock);
duke@435	43	MemProfiler::do_trace();
duke@435	44	}
duke@435	45
duke@435	46
duke@435	47	//----------------------------------------------------------
duke@435	48	// Implementation of MemProfiler
duke@435	49
duke@435	50	MemProfilerTask* MemProfiler::_task = NULL;
duke@435	51	FILE* MemProfiler::_log_fp = NULL;
duke@435	52
duke@435	53
duke@435	54	bool MemProfiler::is_active() {
duke@435	55	return _task != NULL;
duke@435	56	}
duke@435	57
duke@435	58
duke@435	59	void MemProfiler::engage() {
duke@435	60	const char *log_name = "mprofile.log";
duke@435	61	if (!is_active()) {
duke@435	62	// Create log file
duke@435	63	_log_fp = fopen(log_name , "w+");
duke@435	64	if (_log_fp == NULL) {
duke@435	65	fatal1("MemProfiler: Cannot create log file: %s", log_name);
duke@435	66	}
duke@435	67	fprintf(_log_fp, "MemProfiler: sizes are in Kb, time is in seconds since startup\n\n");
duke@435	68	fprintf(_log_fp, " time, #thr, #cls, heap, heap, perm, perm, code, hndls, rescs, oopmp\n");
duke@435	69	fprintf(_log_fp, " used, total, used, total, total, total, total, total\n");
duke@435	70	fprintf(_log_fp, "--------------------------------------------------------------------------\n");
duke@435	71
duke@435	72	_task = new MemProfilerTask(MemProfilingInterval);
duke@435	73	_task->enroll();
duke@435	74	}
duke@435	75	}
duke@435	76
duke@435	77
duke@435	78	void MemProfiler::disengage() {
duke@435	79	if (!is_active()) return;
duke@435	80	// Do one last trace at disengage time
duke@435	81	do_trace();
duke@435	82
duke@435	83	// Close logfile
duke@435	84	fprintf(_log_fp, "MemProfiler detached\n");
duke@435	85	fclose(_log_fp);
duke@435	86
duke@435	87	// remove MemProfilerTask
duke@435	88	assert(_task != NULL, "sanity check");
duke@435	89	_task->disenroll();
duke@435	90	delete _task;
duke@435	91	_task = NULL;
duke@435	92	}
duke@435	93
duke@435	94
duke@435	95	void MemProfiler::do_trace() {
duke@435	96	// Calculate thread local sizes
duke@435	97	size_t handles_memory_usage = VMThread::vm_thread()->handle_area()->size_in_bytes();
duke@435	98	size_t resource_memory_usage = VMThread::vm_thread()->resource_area()->size_in_bytes();
duke@435	99	JavaThread *cur = Threads::first();
duke@435	100	while (cur != NULL) {
duke@435	101	handles_memory_usage += cur->handle_area()->size_in_bytes();
duke@435	102	resource_memory_usage += cur->resource_area()->size_in_bytes();
duke@435	103	cur = cur->next();
duke@435	104	}
duke@435	105
duke@435	106	// Print trace line in log
duke@435	107	fprintf(_log_fp, "%6.1f,%5d,%5d,%6ld,%6ld,%6ld,%6ld,",
duke@435	108	os::elapsedTime(),
duke@435	109	Threads::number_of_threads(),
duke@435	110	SystemDictionary::number_of_classes(),
duke@435	111	Universe::heap()->used() / K,
duke@435	112	Universe::heap()->capacity() / K,
duke@435	113	Universe::heap()->permanent_used() / HWperKB,
duke@435	114	Universe::heap()->permanent_capacity() / HWperKB);
duke@435	115
duke@435	116	fprintf(_log_fp, "%6ld,", CodeCache::capacity() / K);
duke@435	117
duke@435	118	fprintf(_log_fp, "%6ld,%6ld,%6ld\n",
duke@435	119	handles_memory_usage / K,
duke@435	120	resource_memory_usage / K,
duke@435	121	OopMapCache::memory_usage() / K);
duke@435	122	fflush(_log_fp);
duke@435	123	}
duke@435	124
duke@435	125	#endif