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src/share/vm/gc_implementation/shared/immutableSpace.cpp@b2ef234911c9 (annotated)

src/share/vm/gc_implementation/shared/immutableSpace.cpp

Thu, 20 Sep 2012 09:52:56 -0700

author

johnc

date

Thu, 20 Sep 2012 09:52:56 -0700

changeset 4067

b2ef234911c9

parent 4037

da91efe96a93

child 4542

db9981fd3124

permissions

-rw-r--r--

7190666: G1: assert(_unused == 0) failed: Inconsistency in PLAB stats
Summary: Reset the fields in ParGCAllocBuffer, that are used for accumulating values for the ResizePLAB sensors in PLABStats, to zero after flushing the values to the PLABStats fields. Flush PLABStats values only when retiring the final allocation buffers prior to disposing of a G1ParScanThreadState object, rather than when retiring every allocation buffer.
Reviewed-by: jwilhelm, jmasa, ysr

duke@435	1	/*
brutisso@3711	2	* Copyright (c) 2001, 2012, Oracle and/or its affiliates. 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	*
trims@1907	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907	20	* or visit www.oracle.com if you need additional information or have any
trims@1907	21	* questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
stefank@2314	25	#include "precompiled.hpp"
stefank@2314	26	#ifndef SERIALGC
stefank@2314	27	#include "gc_implementation/shared/immutableSpace.hpp"
stefank@2314	28	#include "memory/universe.hpp"
stefank@2314	29	#include "oops/oop.inline.hpp"
stefank@2314	30	#endif
duke@435	31
duke@435	32	void ImmutableSpace::initialize(MemRegion mr) {
duke@435	33	HeapWord* bottom = mr.start();
duke@435	34	HeapWord* end = mr.end();
duke@435	35
duke@435	36	assert(Universe::on_page_boundary(bottom) && Universe::on_page_boundary(end),
duke@435	37	"invalid space boundaries");
duke@435	38
duke@435	39	_bottom = bottom;
duke@435	40	_end = end;
duke@435	41	}
duke@435	42
coleenp@4037	43	void ImmutableSpace::oop_iterate(ExtendedOopClosure* cl) {
duke@435	44	HeapWord* obj_addr = bottom();
duke@435	45	HeapWord* t = end();
duke@435	46	// Could call objects iterate, but this is easier.
duke@435	47	while (obj_addr < t) {
duke@435	48	obj_addr += oop(obj_addr)->oop_iterate(cl);
duke@435	49	}
duke@435	50	}
duke@435	51
duke@435	52	void ImmutableSpace::object_iterate(ObjectClosure* cl) {
duke@435	53	HeapWord* p = bottom();
duke@435	54	while (p < end()) {
duke@435	55	cl->do_object(oop(p));
duke@435	56	p += oop(p)->size();
duke@435	57	}
duke@435	58	}
duke@435	59
duke@435	60	#ifndef PRODUCT
duke@435	61
duke@435	62	void ImmutableSpace::print_short() const {
duke@435	63	tty->print(" space " SIZE_FORMAT "K, 100%% used", capacity_in_bytes() / K);
duke@435	64	}
duke@435	65
duke@435	66	void ImmutableSpace::print() const {
duke@435	67	print_short();
duke@435	68	tty->print_cr(" [%#-6lx,%#-6lx)", bottom(), end());
duke@435	69	}
duke@435	70
duke@435	71	#endif
duke@435	72
brutisso@3711	73	void ImmutableSpace::verify() {
duke@435	74	HeapWord* p = bottom();
duke@435	75	HeapWord* t = end();
duke@435	76	HeapWord* prev_p = NULL;
duke@435	77	while (p < t) {
duke@435	78	oop(p)->verify();
duke@435	79	prev_p = p;
duke@435	80	p += oop(p)->size();
duke@435	81	}
duke@435	82	guarantee(p == end(), "end of last object must match end of space");
duke@435	83	}