• file
• revisions
• annotate
• diff
• comparison
• raw

src/share/vm/gc_implementation/g1/concurrentG1Refine.cpp@f90c822e73f8 (annotated)

src/share/vm/gc_implementation/g1/concurrentG1Refine.cpp

Wed, 27 Apr 2016 01:25:04 +0800

author

aoqi

date

Wed, 27 Apr 2016 01:25:04 +0800

changeset 0

f90c822e73f8

child 6876

710a3c8b516e

permissions

-rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#include "precompiled.hpp"
aoqi@0	26	#include "gc_implementation/g1/concurrentG1Refine.hpp"
aoqi@0	27	#include "gc_implementation/g1/concurrentG1RefineThread.hpp"
aoqi@0	28	#include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
aoqi@0	29	#include "gc_implementation/g1/g1HotCardCache.hpp"
aoqi@0	30	#include "runtime/java.hpp"
aoqi@0	31
aoqi@0	32	ConcurrentG1Refine::ConcurrentG1Refine(G1CollectedHeap* g1h) :
aoqi@0	33	_threads(NULL), _n_threads(0),
aoqi@0	34	_hot_card_cache(g1h)
aoqi@0	35	{
aoqi@0	36	// Ergomonically select initial concurrent refinement parameters
aoqi@0	37	if (FLAG_IS_DEFAULT(G1ConcRefinementGreenZone)) {
aoqi@0	38	FLAG_SET_DEFAULT(G1ConcRefinementGreenZone, MAX2<int>(ParallelGCThreads, 1));
aoqi@0	39	}
aoqi@0	40	set_green_zone(G1ConcRefinementGreenZone);
aoqi@0	41
aoqi@0	42	if (FLAG_IS_DEFAULT(G1ConcRefinementYellowZone)) {
aoqi@0	43	FLAG_SET_DEFAULT(G1ConcRefinementYellowZone, green_zone() * 3);
aoqi@0	44	}
aoqi@0	45	set_yellow_zone(MAX2<int>(G1ConcRefinementYellowZone, green_zone()));
aoqi@0	46
aoqi@0	47	if (FLAG_IS_DEFAULT(G1ConcRefinementRedZone)) {
aoqi@0	48	FLAG_SET_DEFAULT(G1ConcRefinementRedZone, yellow_zone() * 2);
aoqi@0	49	}
aoqi@0	50	set_red_zone(MAX2<int>(G1ConcRefinementRedZone, yellow_zone()));
aoqi@0	51
aoqi@0	52	_n_worker_threads = thread_num();
aoqi@0	53	// We need one extra thread to do the young gen rset size sampling.
aoqi@0	54	_n_threads = _n_worker_threads + 1;
aoqi@0	55
aoqi@0	56	reset_threshold_step();
aoqi@0	57
aoqi@0	58	_threads = NEW_C_HEAP_ARRAY(ConcurrentG1RefineThread*, _n_threads, mtGC);
aoqi@0	59
aoqi@0	60	uint worker_id_offset = DirtyCardQueueSet::num_par_ids();
aoqi@0	61
aoqi@0	62	ConcurrentG1RefineThread *next = NULL;
aoqi@0	63	for (uint i = _n_threads - 1; i != UINT_MAX; i--) {
aoqi@0	64	ConcurrentG1RefineThread* t = new ConcurrentG1RefineThread(this, next, worker_id_offset, i);
aoqi@0	65	assert(t != NULL, "Conc refine should have been created");
aoqi@0	66	if (t->osthread() == NULL) {
aoqi@0	67	vm_shutdown_during_initialization("Could not create ConcurrentG1RefineThread");
aoqi@0	68	}
aoqi@0	69
aoqi@0	70	assert(t->cg1r() == this, "Conc refine thread should refer to this");
aoqi@0	71	_threads[i] = t;
aoqi@0	72	next = t;
aoqi@0	73	}
aoqi@0	74	}
aoqi@0	75
aoqi@0	76	void ConcurrentG1Refine::reset_threshold_step() {
aoqi@0	77	if (FLAG_IS_DEFAULT(G1ConcRefinementThresholdStep)) {
aoqi@0	78	_thread_threshold_step = (yellow_zone() - green_zone()) / (worker_thread_num() + 1);
aoqi@0	79	} else {
aoqi@0	80	_thread_threshold_step = G1ConcRefinementThresholdStep;
aoqi@0	81	}
aoqi@0	82	}
aoqi@0	83
aoqi@0	84	void ConcurrentG1Refine::init() {
aoqi@0	85	_hot_card_cache.initialize();
aoqi@0	86	}
aoqi@0	87
aoqi@0	88	void ConcurrentG1Refine::stop() {
aoqi@0	89	if (_threads != NULL) {
aoqi@0	90	for (uint i = 0; i < _n_threads; i++) {
aoqi@0	91	_threads[i]->stop();
aoqi@0	92	}
aoqi@0	93	}
aoqi@0	94	}
aoqi@0	95
aoqi@0	96	void ConcurrentG1Refine::reinitialize_threads() {
aoqi@0	97	reset_threshold_step();
aoqi@0	98	if (_threads != NULL) {
aoqi@0	99	for (uint i = 0; i < _n_threads; i++) {
aoqi@0	100	_threads[i]->initialize();
aoqi@0	101	}
aoqi@0	102	}
aoqi@0	103	}
aoqi@0	104
aoqi@0	105	ConcurrentG1Refine::~ConcurrentG1Refine() {
aoqi@0	106	if (_threads != NULL) {
aoqi@0	107	for (uint i = 0; i < _n_threads; i++) {
aoqi@0	108	delete _threads[i];
aoqi@0	109	}
aoqi@0	110	FREE_C_HEAP_ARRAY(ConcurrentG1RefineThread*, _threads, mtGC);
aoqi@0	111	}
aoqi@0	112	}
aoqi@0	113
aoqi@0	114	void ConcurrentG1Refine::threads_do(ThreadClosure *tc) {
aoqi@0	115	if (_threads != NULL) {
aoqi@0	116	for (uint i = 0; i < _n_threads; i++) {
aoqi@0	117	tc->do_thread(_threads[i]);
aoqi@0	118	}
aoqi@0	119	}
aoqi@0	120	}
aoqi@0	121
aoqi@0	122	void ConcurrentG1Refine::worker_threads_do(ThreadClosure * tc) {
aoqi@0	123	if (_threads != NULL) {
aoqi@0	124	for (uint i = 0; i < worker_thread_num(); i++) {
aoqi@0	125	tc->do_thread(_threads[i]);
aoqi@0	126	}
aoqi@0	127	}
aoqi@0	128	}
aoqi@0	129
aoqi@0	130	uint ConcurrentG1Refine::thread_num() {
aoqi@0	131	uint n_threads = (G1ConcRefinementThreads > 0) ? G1ConcRefinementThreads
aoqi@0	132	: ParallelGCThreads;
aoqi@0	133	return MAX2<uint>(n_threads, 1);
aoqi@0	134	}
aoqi@0	135
aoqi@0	136	void ConcurrentG1Refine::print_worker_threads_on(outputStream* st) const {
aoqi@0	137	for (uint i = 0; i < _n_threads; ++i) {
aoqi@0	138	_threads[i]->print_on(st);
aoqi@0	139	st->cr();
aoqi@0	140	}
aoqi@0	141	}
aoqi@0	142
aoqi@0	143	ConcurrentG1RefineThread * ConcurrentG1Refine::sampling_thread() const {
aoqi@0	144	return _threads[worker_thread_num()];
aoqi@0	145	}