truffle: src/share/vm/gc_implementation/g1/satbQueue.cpp annotate

annotate src/share/vm/gc_implementation/g1/satbQueue.cpp @ 11979:8d4ff57af591

8022051: G1: Remove some unused G1 flags Reviewed-by: tschatzl, jmasa

author	brutisso
date	Thu, 01 Aug 2013 17:29:49 +0200
parents	da91efe96a93
children	89ac31a5a7a7

rev	line source
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1 /*
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	4 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	7 * published by the Free Software Foundation.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	8 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	13 * accompanied this code).
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	14 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	18 *
1552 c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1317 diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1317 diff changeset	20 * or visit www.oracle.com if you need additional information or have any
c18cbe5936b8 6941466: Oracle rebranding changes for Hotspot repositories trims parents: 1317 diff changeset	21 * questions.
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	22 *
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	23 */
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	24
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	25 #include "precompiled.hpp"
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	26 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	27 #include "gc_implementation/g1/satbQueue.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	28 #include "memory/allocation.inline.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	29 #include "memory/sharedHeap.hpp"
6725 da91efe96a93 6964458: Reimplement class meta-data storage to use native memory coleenp parents: 6197 diff changeset	30 #include "oops/oop.inline.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	31 #include "runtime/mutexLocker.hpp"
f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	32 #include "runtime/thread.hpp"
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 2149 diff changeset	33 #include "runtime/vmThread.hpp"
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	34
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	35 void ObjPtrQueue::flush() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	36 // The buffer might contain refs into the CSet. We have to filter it
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	37 // first before we flush it, otherwise we might end up with an
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	38 // enqueued buffer with refs into the CSet which breaks our invariants.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	39 filter();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	40 PtrQueue::flush();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	41 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	42
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	43 // This method removes entries from an SATB buffer that will not be
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	44 // useful to the concurrent marking threads. An entry is removed if it
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	45 // satisfies one of the following conditions:
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	46 //
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	47 // * it points to an object outside the G1 heap (G1's concurrent
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	48 // marking only visits objects inside the G1 heap),
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	49 // * it points to an object that has been allocated since marking
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	50 // started (according to SATB those objects do not need to be
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	51 // visited during marking), or
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	52 // * it points to an object that has already been marked (no need to
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	53 // process it again).
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	54 //
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	55 // The rest of the entries will be retained and are compacted towards
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	56 // the top of the buffer. Note that, because we do not allow old
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	57 // regions in the CSet during marking, all objects on the CSet regions
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	58 // are young (eden or survivors) and therefore implicitly live. So any
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	59 // references into the CSet will be removed during filtering.
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	60
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	61 void ObjPtrQueue::filter() {
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	62 G1CollectedHeap* g1h = G1CollectedHeap::heap();
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	63 void** buf = _buf;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	64 size_t sz = _sz;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	65
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	66 if (buf == NULL) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	67 // nothing to do
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	68 return;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	69 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	70
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	71 // Used for sanity checking at the end of the loop.
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	72 debug_only(size_t entries = 0; size_t retained = 0;)
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	73
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	74 size_t i = sz;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	75 size_t new_index = sz;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	76
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	77 while (i > _index) {
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	78 assert(i > 0, "we should have at least one more entry to process");
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	79 i -= oopSize;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	80 debug_only(entries += 1;)
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	81 oop* p = (oop*) &buf[byte_index_to_index((int) i)];
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	82 oop obj = *p;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	83 // NULL the entry so that unused parts of the buffer contain NULLs
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	84 // at the end. If we are going to retain it we will copy it to its
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	85 // final place. If we have retained all entries we have visited so
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	86 // far, we'll just end up copying it to the same place.
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	87 *p = NULL;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	88
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	89 bool retain = g1h->is_obj_ill(obj);
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	90 if (retain) {
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	91 assert(new_index > 0, "we should not have already filled up the buffer");
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	92 new_index -= oopSize;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	93 assert(new_index >= i,
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	94 "new_index should never be below i, as we alwaysr compact 'up'");
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	95 oop* new_p = (oop*) &buf[byte_index_to_index((int) new_index)];
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	96 assert(new_p >= p, "the destination location should never be below "
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	97 "the source as we always compact 'up'");
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	98 assert(*new_p == NULL,
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	99 "we should have already cleared the destination location");
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	100 *new_p = obj;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	101 debug_only(retained += 1;)
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	102 }
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	103 }
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	104
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	105 #ifdef ASSERT
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	106 size_t entries_calc = (sz - _index) / oopSize;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	107 assert(entries == entries_calc, "the number of entries we counted "
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	108 "should match the number of entries we calculated");
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	109 size_t retained_calc = (sz - new_index) / oopSize;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	110 assert(retained == retained_calc, "the number of retained entries we counted "
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	111 "should match the number of retained entries we calculated");
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	112 #endif // ASSERT
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	113
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	114 _index = new_index;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	115 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	116
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	117 // This method will first apply the above filtering to the buffer. If
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	118 // post-filtering a large enough chunk of the buffer has been cleared
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	119 // we can re-use the buffer (instead of enqueueing it) and we can just
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	120 // allow the mutator to carry on executing using the same buffer
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	121 // instead of replacing it.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	122
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	123 bool ObjPtrQueue::should_enqueue_buffer() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	124 assert(_lock == NULL \|\| _lock->owned_by_self(),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	125 "we should have taken the lock before calling this");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	126
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	127 // Even if G1SATBBufferEnqueueingThresholdPercent == 0 we have to
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	128 // filter the buffer given that this will remove any references into
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	129 // the CSet as we currently assume that no such refs will appear in
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	130 // enqueued buffers.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	131
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	132 // This method should only be called if there is a non-NULL buffer
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	133 // that is full.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	134 assert(_index == 0, "pre-condition");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	135 assert(_buf != NULL, "pre-condition");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	136
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	137 filter();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	138
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	139 size_t sz = _sz;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	140 size_t all_entries = sz / oopSize;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	141 size_t retained_entries = (sz - _index) / oopSize;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	142 size_t perc = retained_entries * 100 / all_entries;
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	143 bool should_enqueue = perc > (size_t) G1SATBBufferEnqueueingThresholdPercent;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	144 return should_enqueue;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	145 }
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	146
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	147 void ObjPtrQueue::apply_closure(ObjectClosure* cl) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	148 if (_buf != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	149 apply_closure_to_buffer(cl, _buf, _index, _sz);
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	150 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	151 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	152
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	153 void ObjPtrQueue::apply_closure_and_empty(ObjectClosure* cl) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	154 if (_buf != NULL) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	155 apply_closure_to_buffer(cl, _buf, _index, _sz);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	156 _index = _sz;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	157 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	158 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	159
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	160 void ObjPtrQueue::apply_closure_to_buffer(ObjectClosure* cl,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	161 void** buf, size_t index, size_t sz) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	162 if (cl == NULL) return;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	163 for (size_t i = index; i < sz; i += oopSize) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	164 oop obj = (oop)buf[byte_index_to_index((int)i)];
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	165 // There can be NULL entries because of destructors.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	166 if (obj != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	167 cl->do_object(obj);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	168 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	169 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	170 }
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 342 diff changeset	171
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	172 #ifndef PRODUCT
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	173 // Helpful for debugging
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	174
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	175 void ObjPtrQueue::print(const char* name) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	176 print(name, _buf, _index, _sz);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	177 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	178
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	179 void ObjPtrQueue::print(const char* name,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	180 void** buf, size_t index, size_t sz) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	181 gclog_or_tty->print_cr(" SATB BUFFER [%s] buf: "PTR_FORMAT" "
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	182 "index: "SIZE_FORMAT" sz: "SIZE_FORMAT,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	183 name, buf, index, sz);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	184 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	185 #endif // PRODUCT
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	186
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 342 diff changeset	187 #ifdef ASSERT
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 342 diff changeset	188 void ObjPtrQueue::verify_oops_in_buffer() {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 342 diff changeset	189 if (_buf == NULL) return;
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 342 diff changeset	190 for (size_t i = _index; i < _sz; i += oopSize) {
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 342 diff changeset	191 oop obj = (oop)_buf[byte_index_to_index((int)i)];
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 342 diff changeset	192 assert(obj != NULL && obj->is_oop(true /* ignore mark word */),
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 342 diff changeset	193 "Not an oop");
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 342 diff changeset	194 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 342 diff changeset	195 }
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 342 diff changeset	196 #endif
df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 342 diff changeset	197
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	198 #ifdef _MSC_VER // the use of 'this' below gets a warning, make it go away
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	199 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	200 #endif // _MSC_VER
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	201
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	202 SATBMarkQueueSet::SATBMarkQueueSet() :
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	203 PtrQueueSet(), _closure(NULL), _par_closures(NULL),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	204 _shared_satb_queue(this, true /perm/) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	205
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	206 void SATBMarkQueueSet::initialize(Monitor* cbl_mon, Mutex* fl_lock,
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	207 int process_completed_threshold,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	208 Mutex* lock) {
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	209 PtrQueueSet::initialize(cbl_mon, fl_lock, process_completed_threshold, -1);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	210 _shared_satb_queue.set_lock(lock);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	211 if (ParallelGCThreads > 0) {
6197 d2a62e0f25eb 6995781: Native Memory Tracking (Phase 1) zgu parents: 4787 diff changeset	212 _par_closures = NEW_C_HEAP_ARRAY(ObjectClosure*, ParallelGCThreads, mtGC);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	213 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	214 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	215
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	216 void SATBMarkQueueSet::handle_zero_index_for_thread(JavaThread* t) {
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 342 diff changeset	217 DEBUG_ONLY(t->satb_mark_queue().verify_oops_in_buffer();)
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	218 t->satb_mark_queue().handle_zero_index();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	219 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	220
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	221 #ifdef ASSERT
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	222 void SATBMarkQueueSet::dump_active_values(JavaThread* first,
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	223 bool expected_active) {
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	224 gclog_or_tty->print_cr("SATB queue active values for Java Threads");
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	225 gclog_or_tty->print_cr(" SATB queue set: active is %s",
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	226 (is_active()) ? "TRUE" : "FALSE");
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	227 gclog_or_tty->print_cr(" expected_active is %s",
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	228 (expected_active) ? "TRUE" : "FALSE");
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	229 for (JavaThread* t = first; t; t = t->next()) {
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	230 bool active = t->satb_mark_queue().is_active();
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	231 gclog_or_tty->print_cr(" thread %s, active is %s",
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	232 t->name(), (active) ? "TRUE" : "FALSE");
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	233 }
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	234 }
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	235 #endif // ASSERT
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	236
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	237 void SATBMarkQueueSet::set_active_all_threads(bool b,
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	238 bool expected_active) {
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	239 assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint.");
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	240 JavaThread* first = Threads::first();
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	241
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	242 #ifdef ASSERT
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	243 if (_all_active != expected_active) {
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	244 dump_active_values(first, expected_active);
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	245
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	246 // I leave this here as a guarantee, instead of an assert, so
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	247 // that it will still be compiled in if we choose to uncomment
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	248 // the #ifdef ASSERT in a product build. The whole block is
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	249 // within an #ifdef ASSERT so the guarantee will not be compiled
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	250 // in a product build anyway.
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	251 guarantee(false,
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	252 "SATB queue set has an unexpected active value");
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	253 }
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	254 #endif // ASSERT
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	255 _all_active = b;
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	256
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	257 for (JavaThread* t = first; t; t = t->next()) {
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	258 #ifdef ASSERT
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	259 bool active = t->satb_mark_queue().is_active();
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	260 if (active != expected_active) {
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	261 dump_active_values(first, expected_active);
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	262
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	263 // I leave this here as a guarantee, instead of an assert, so
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	264 // that it will still be compiled in if we choose to uncomment
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	265 // the #ifdef ASSERT in a product build. The whole block is
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	266 // within an #ifdef ASSERT so the guarantee will not be compiled
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	267 // in a product build anyway.
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	268 guarantee(false,
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	269 "thread has an unexpected active value in its SATB queue");
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	270 }
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	271 #endif // ASSERT
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	272 t->satb_mark_queue().set_active(b);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	273 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	274 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	275
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	276 void SATBMarkQueueSet::filter_thread_buffers() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	277 for(JavaThread* t = Threads::first(); t; t = t->next()) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	278 t->satb_mark_queue().filter();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	279 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	280 shared_satb_queue()->filter();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	281 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	282
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	283 void SATBMarkQueueSet::set_closure(ObjectClosure* closure) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	284 _closure = closure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	285 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	286
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	287 void SATBMarkQueueSet::set_par_closure(int i, ObjectClosure* par_closure) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	288 assert(ParallelGCThreads > 0 && _par_closures != NULL, "Precondition");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	289 _par_closures[i] = par_closure;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	290 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	291
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	292 void SATBMarkQueueSet::iterate_closure_all_threads() {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	293 for(JavaThread* t = Threads::first(); t; t = t->next()) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	294 t->satb_mark_queue().apply_closure_and_empty(_closure);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	295 }
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	296 shared_satb_queue()->apply_closure_and_empty(_closure);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	297 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	298
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	299 void SATBMarkQueueSet::par_iterate_closure_all_threads(int worker) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	300 SharedHeap* sh = SharedHeap::heap();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	301 int parity = sh->strong_roots_parity();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	302
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	303 for(JavaThread* t = Threads::first(); t; t = t->next()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	304 if (t->claim_oops_do(true, parity)) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	305 t->satb_mark_queue().apply_closure_and_empty(_par_closures[worker]);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	306 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	307 }
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 2149 diff changeset	308
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 2149 diff changeset	309 // We also need to claim the VMThread so that its parity is updated
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 2149 diff changeset	310 // otherwise the next call to Thread::possibly_parallel_oops_do inside
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 2149 diff changeset	311 // a StrongRootsScope might skip the VMThread because it has a stale
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 2149 diff changeset	312 // parity that matches the parity set by the StrongRootsScope
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 2149 diff changeset	313 //
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 2149 diff changeset	314 // Whichever worker succeeds in claiming the VMThread gets to do
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 2149 diff changeset	315 // the shared queue.
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 2149 diff changeset	316
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 2149 diff changeset	317 VMThread* vmt = VMThread::vm_thread();
4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 2149 diff changeset	318 if (vmt->claim_oops_do(true, parity)) {
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	319 shared_satb_queue()->apply_closure_and_empty(_par_closures[worker]);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	320 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	321 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	322
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	323 bool SATBMarkQueueSet::apply_closure_to_completed_buffer_work(bool par,
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	324 int worker) {
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	325 BufferNode* nd = NULL;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	326 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	327 MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	328 if (_completed_buffers_head != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	329 nd = _completed_buffers_head;
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	330 _completed_buffers_head = nd->next();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	331 if (_completed_buffers_head == NULL) _completed_buffers_tail = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	332 _n_completed_buffers--;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	333 if (_n_completed_buffers == 0) _process_completed = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	334 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	335 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	336 ObjectClosure* cl = (par ? _par_closures[worker] : _closure);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	337 if (nd != NULL) {
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	338 void **buf = BufferNode::make_buffer_from_node(nd);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	339 ObjPtrQueue::apply_closure_to_buffer(cl, buf, 0, _sz);
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	340 deallocate_buffer(buf);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	341 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	342 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	343 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	344 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	345 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	346
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	347 void SATBMarkQueueSet::iterate_completed_buffers_read_only(ObjectClosure* cl) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	348 assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint.");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	349 assert(cl != NULL, "pre-condition");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	350
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	351 BufferNode* nd = _completed_buffers_head;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	352 while (nd != NULL) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	353 void** buf = BufferNode::make_buffer_from_node(nd);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	354 ObjPtrQueue::apply_closure_to_buffer(cl, buf, 0, _sz);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	355 nd = nd->next();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	356 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	357 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	358
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	359 void SATBMarkQueueSet::iterate_thread_buffers_read_only(ObjectClosure* cl) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	360 assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint.");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	361 assert(cl != NULL, "pre-condition");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	362
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	363 for (JavaThread* t = Threads::first(); t; t = t->next()) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	364 t->satb_mark_queue().apply_closure(cl);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	365 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	366 shared_satb_queue()->apply_closure(cl);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	367 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	368
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	369 #ifndef PRODUCT
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	370 // Helpful for debugging
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	371
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	372 #define SATB_PRINTER_BUFFER_SIZE 256
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	373
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	374 void SATBMarkQueueSet::print_all(const char* msg) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	375 char buffer[SATB_PRINTER_BUFFER_SIZE];
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	376 assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint.");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	377
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	378 gclog_or_tty->cr();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	379 gclog_or_tty->print_cr("SATB BUFFERS [%s]", msg);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	380
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	381 BufferNode* nd = _completed_buffers_head;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	382 int i = 0;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	383 while (nd != NULL) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	384 void** buf = BufferNode::make_buffer_from_node(nd);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	385 jio_snprintf(buffer, SATB_PRINTER_BUFFER_SIZE, "Enqueued: %d", i);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	386 ObjPtrQueue::print(buffer, buf, 0, _sz);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	387 nd = nd->next();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	388 i += 1;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	389 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	390
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	391 for (JavaThread* t = Threads::first(); t; t = t->next()) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	392 jio_snprintf(buffer, SATB_PRINTER_BUFFER_SIZE, "Thread: %s", t->name());
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	393 t->satb_mark_queue().print(buffer);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	394 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	395
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	396 shared_satb_queue()->print("Shared");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	397
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	398 gclog_or_tty->cr();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	399 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	400 #endif // PRODUCT
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	401
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	402 void SATBMarkQueueSet::abandon_partial_marking() {
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	403 BufferNode* buffers_to_delete = NULL;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	404 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	405 MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	406 while (_completed_buffers_head != NULL) {
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	407 BufferNode* nd = _completed_buffers_head;
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	408 _completed_buffers_head = nd->next();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	409 nd->set_next(buffers_to_delete);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	410 buffers_to_delete = nd;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	411 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	412 _completed_buffers_tail = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	413 _n_completed_buffers = 0;
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 342 diff changeset	414 DEBUG_ONLY(assert_completed_buffer_list_len_correct_locked());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	415 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	416 while (buffers_to_delete != NULL) {
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	417 BufferNode* nd = buffers_to_delete;
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	418 buffers_to_delete = nd->next();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	419 deallocate_buffer(BufferNode::make_buffer_from_node(nd));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	420 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	421 assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	422 // So we can safely manipulate these queues.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	423 for (JavaThread* t = Threads::first(); t; t = t->next()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	424 t->satb_mark_queue().reset();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	425 }
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	426 shared_satb_queue()->reset();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	427 }

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/g1/satbQueue.cpp @ 11979:8d4ff57af591