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src/share/vm/gc_implementation/g1/vm_operations_g1.cpp@15c5903cf9e1 (annotated)

src/share/vm/gc_implementation/g1/vm_operations_g1.cpp

Mon, 03 Aug 2009 12:59:30 -0700

author

johnc

date

Mon, 03 Aug 2009 12:59:30 -0700

changeset 1324

15c5903cf9e1

parent 1279

bd02caa94611

child 1523

3fc996d4edd2

permissions

-rw-r--r--

6865703: G1: Parallelize hot card cache cleanup
Summary: Have the GC worker threads clear the hot card cache in parallel by having each worker thread claim a chunk of the card cache and process the cards in that chunk. The size of the chunks that each thread will claim is determined at VM initialization from the size of the card cache and the number of worker threads.
Reviewed-by: jmasa, tonyp

ysr@777	1	/*
xdono@1279	2	* Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved.
ysr@777	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
ysr@777	4	*
ysr@777	5	* This code is free software; you can redistribute it and/or modify it
ysr@777	6	* under the terms of the GNU General Public License version 2 only, as
ysr@777	7	* published by the Free Software Foundation.
ysr@777	8	*
ysr@777	9	* This code is distributed in the hope that it will be useful, but WITHOUT
ysr@777	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
ysr@777	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
ysr@777	12	* version 2 for more details (a copy is included in the LICENSE file that
ysr@777	13	* accompanied this code).
ysr@777	14	*
ysr@777	15	* You should have received a copy of the GNU General Public License version
ysr@777	16	* 2 along with this work; if not, write to the Free Software Foundation,
ysr@777	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
ysr@777	18	*
ysr@777	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
ysr@777	20	* CA 95054 USA or visit www.sun.com if you need additional information or
ysr@777	21	* have any questions.
ysr@777	22	*
ysr@777	23	*/
ysr@777	24
ysr@777	25	#include "incls/_precompiled.incl"
ysr@777	26	#include "incls/_vm_operations_g1.cpp.incl"
ysr@777	27
ysr@777	28	void VM_G1CollectForAllocation::doit() {
ysr@777	29	JvmtiGCForAllocationMarker jgcm;
ysr@777	30	G1CollectedHeap* g1h = G1CollectedHeap::heap();
ysr@777	31	_res = g1h->satisfy_failed_allocation(_size);
ysr@777	32	assert(g1h->is_in_or_null(_res), "result not in heap");
ysr@777	33	}
ysr@777	34
ysr@777	35	void VM_G1CollectFull::doit() {
ysr@777	36	JvmtiGCFullMarker jgcm;
ysr@777	37	G1CollectedHeap* g1h = G1CollectedHeap::heap();
ysr@777	38	GCCauseSetter x(g1h, _gc_cause);
ysr@777	39	g1h->do_full_collection(false /* clear_all_soft_refs */);
ysr@777	40	}
ysr@777	41
ysr@777	42	void VM_G1IncCollectionPause::doit() {
ysr@777	43	JvmtiGCForAllocationMarker jgcm;
ysr@777	44	G1CollectedHeap* g1h = G1CollectedHeap::heap();
ysr@777	45	GCCauseSetter x(g1h, GCCause::_g1_inc_collection_pause);
apetrusenko@1112	46	g1h->do_collection_pause_at_safepoint();
ysr@777	47	}
ysr@777	48
ysr@777	49	void VM_CGC_Operation::doit() {
ysr@777	50	gclog_or_tty->date_stamp(PrintGC && PrintGCDateStamps);
ysr@777	51	TraceCPUTime tcpu(PrintGCDetails, true, gclog_or_tty);
ysr@777	52	TraceTime t(_printGCMessage, PrintGC, true, gclog_or_tty);
ysr@777	53	SharedHeap* sh = SharedHeap::heap();
ysr@777	54	// This could go away if CollectedHeap gave access to _gc_is_active...
ysr@777	55	if (sh != NULL) {
ysr@777	56	IsGCActiveMark x;
ysr@777	57	_cl->do_void();
ysr@777	58	} else {
ysr@777	59	_cl->do_void();
ysr@777	60	}
ysr@777	61	}
ysr@777	62
ysr@777	63	bool VM_CGC_Operation::doit_prologue() {
ysr@777	64	Heap_lock->lock();
ysr@777	65	SharedHeap::heap()->_thread_holds_heap_lock_for_gc = true;
ysr@777	66	return true;
ysr@777	67	}
ysr@777	68
ysr@777	69	void VM_CGC_Operation::doit_epilogue() {
ysr@777	70	SharedHeap::heap()->_thread_holds_heap_lock_for_gc = false;
ysr@777	71	Heap_lock->unlock();
ysr@777	72	}