graal-jvmci-8: src/share/vm/gc_implementation/g1/satbQueue.cpp annotate

annotate src/share/vm/gc_implementation/g1/satbQueue.cpp @ 23472:047a642c9729

8065579: WB method to start G1 concurrent mark cycle should be introduced Summary: Add a WhiteBox callback to the VM to start a concurrent mark cycle in G1. Reviewed-by: tschatzl, sjohanss Contributed-by: Leonid Mesnik <leonid.mesnik@oracle.com>

author	kevinw
date	Wed, 02 Dec 2015 13:58:34 +0530
parents	399885e13e90
children	dd9cc155639c

rev	line source
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	1 /*
23027 2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	2 * Copyright (c) 2001, 2015, 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"
23030 399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	32 #include "runtime/safepoint.hpp"
1972 f95d63e2154a 6989984: Use standard include model for Hospot stefank parents: 1552 diff changeset	33 #include "runtime/thread.hpp"
3979 4dfb2df418f2 6484982: G1: process references during evacuation pauses johnc parents: 2149 diff changeset	34 #include "runtime/vmThread.hpp"
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	35
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	36 PRAGMA_FORMAT_MUTE_WARNINGS_FOR_GCC
78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 17844 diff changeset	37
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	38 void ObjPtrQueue::flush() {
23027 2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	39 // Filter now to possibly save work later. If filtering empties the
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	40 // buffer then flush_impl can deallocate the buffer.
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	41 filter();
20731 42c091d63c72 8048949: Requeue queue implementation tschatzl parents: 17937 diff changeset	42 flush_impl();
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	43 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	44
23027 2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	45 // Return true if a SATB buffer entry refers to an object that
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	46 // requires marking.
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	47 //
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	48 // The entry must point into the G1 heap. In particular, it must not
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	49 // be a NULL pointer. NULL pointers are pre-filtered and never
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	50 // inserted into a SATB buffer.
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	51 //
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	52 // An entry that is below the NTAMS pointer for the containing heap
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	53 // region requires marking. Such an entry must point to a valid object.
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	54 //
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	55 // An entry that is at least the NTAMS pointer for the containing heap
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	56 // region might be any of the following, none of which should be marked.
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	57 //
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	58 // * A reference to an object allocated since marking started.
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	59 // According to SATB, such objects are implicitly kept live and do
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	60 // not need to be dealt with via SATB buffer processing.
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	61 //
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	62 // * A reference to a young generation object. Young objects are
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	63 // handled separately and are not marked by concurrent marking.
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	64 //
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	65 // * A stale reference to a young generation object. If a young
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	66 // generation object reference is recorded and not filtered out
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	67 // before being moved by a young collection, the reference becomes
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	68 // stale.
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	69 //
23027 2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	70 // * A stale reference to an eagerly reclaimed humongous object. If a
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	71 // humongous object is recorded and then reclaimed, the reference
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	72 // becomes stale.
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	73 //
23027 2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	74 // The stale reference cases are implicitly handled by the NTAMS
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	75 // comparison. Because of the possibility of stale references, buffer
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	76 // processing must be somewhat circumspect and not assume entries
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	77 // in an unfiltered buffer refer to valid objects.
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	78
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	79 inline bool requires_marking(const void* entry, G1CollectedHeap* heap) {
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	80 // Includes rejection of NULL pointers.
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	81 assert(heap->is_in_reserved(entry),
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	82 err_msg("Non-heap pointer in SATB buffer: " PTR_FORMAT, p2i(entry)));
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	83
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	84 HeapRegion* region = heap->heap_region_containing_raw(entry);
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	85 assert(region != NULL, err_msg("No region for " PTR_FORMAT, p2i(entry)));
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	86 if (entry >= region->next_top_at_mark_start()) {
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	87 return false;
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	88 }
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	89
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	90 assert(((oop)entry)->is_oop(true /* ignore mark word */),
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	91 err_msg("Invalid oop in SATB buffer: " PTR_FORMAT, p2i(entry)));
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	92
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	93 return true;
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	94 }
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	95
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	96 // This method removes entries from a SATB buffer that will not be
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	97 // useful to the concurrent marking threads. Entries are retained if
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	98 // they require marking and are not already marked. Retained entries
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	99 // are compacted toward the top of the buffer.
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	100
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	101 void ObjPtrQueue::filter() {
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	102 G1CollectedHeap* g1h = G1CollectedHeap::heap();
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	103 void** buf = _buf;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	104 size_t sz = _sz;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	105
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	106 if (buf == NULL) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	107 // nothing to do
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	108 return;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	109 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	110
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	111 // Used for sanity checking at the end of the loop.
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	112 debug_only(size_t entries = 0; size_t retained = 0;)
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	113
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	114 size_t i = sz;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	115 size_t new_index = sz;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	116
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	117 while (i > _index) {
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	118 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	119 i -= oopSize;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	120 debug_only(entries += 1;)
23027 2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	121 void** p = &buf[byte_index_to_index((int) i)];
2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	122 void* entry = *p;
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	123 // 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	124 // 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	125 // 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	126 // 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	127 *p = NULL;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	128
23027 2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	129 if (requires_marking(entry, g1h) && !g1h->isMarkedNext((oop)entry)) {
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	130 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	131 new_index -= oopSize;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	132 assert(new_index >= i,
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	133 "new_index should never be below i, as we alwaysr compact 'up'");
23027 2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	134 void** new_p = &buf[byte_index_to_index((int) new_index)];
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	135 assert(new_p >= p, "the destination location should never be below "
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	136 "the source as we always compact 'up'");
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	137 assert(*new_p == NULL,
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	138 "we should have already cleared the destination location");
23027 2e5e058881f4 8075466: SATB queue pre-filter verify found reclaimed humongous object kbarrett parents: 20762 diff changeset	139 *new_p = entry;
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	140 debug_only(retained += 1;)
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	141 }
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	142 }
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	143
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	144 #ifdef ASSERT
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	145 size_t entries_calc = (sz - _index) / oopSize;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	146 assert(entries == entries_calc, "the number of entries we counted "
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	147 "should match the number of entries we calculated");
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	148 size_t retained_calc = (sz - new_index) / oopSize;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	149 assert(retained == retained_calc, "the number of retained entries we counted "
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	150 "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	151 #endif // ASSERT
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 _index = new_index;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	154 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	155
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	156 // 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	157 // 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	158 // 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	159 // 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	160 // instead of replacing it.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	161
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	162 bool ObjPtrQueue::should_enqueue_buffer() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	163 assert(_lock == NULL \|\| _lock->owned_by_self(),
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	164 "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	165
23030 399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	166 // If G1SATBBufferEnqueueingThresholdPercent == 0 we could skip filtering.
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	167
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	168 // 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	169 // that is full.
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	170 assert(_index == 0, "pre-condition");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	171 assert(_buf != NULL, "pre-condition");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	172
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	173 filter();
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 size_t sz = _sz;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	176 size_t all_entries = sz / oopSize;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	177 size_t retained_entries = (sz - _index) / oopSize;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	178 size_t perc = retained_entries * 100 / all_entries;
2149 7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	179 bool should_enqueue = perc > (size_t) G1SATBBufferEnqueueingThresholdPercent;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	180 return should_enqueue;
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	181 }
7e37af9d69ef 7011379: G1: overly long concurrent marking cycles tonyp parents: 1972 diff changeset	182
23030 399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	183 void ObjPtrQueue::apply_closure_and_empty(SATBBufferClosure* cl) {
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	184 assert(SafepointSynchronize::is_at_safepoint(),
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	185 "SATB queues must only be processed at safepoints");
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	186 if (_buf != NULL) {
23030 399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	187 assert(_index % sizeof(void*) == 0, "invariant");
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	188 assert(_sz % sizeof(void*) == 0, "invariant");
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	189 assert(_index <= _sz, "invariant");
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	190 cl->do_buffer(_buf + byte_index_to_index((int)_index),
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	191 byte_index_to_index((int)(_sz - _index)));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	192 _index = _sz;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	193 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	194 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	195
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	196 #ifndef PRODUCT
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	197 // Helpful for debugging
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	198
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	199 void ObjPtrQueue::print(const char* name) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	200 print(name, _buf, _index, _sz);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	201 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	202
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	203 void ObjPtrQueue::print(const char* name,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	204 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	205 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	206 "index: "SIZE_FORMAT" sz: "SIZE_FORMAT,
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	207 name, buf, index, sz);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	208 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	209 #endif // PRODUCT
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	210
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	211 #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	212 #pragma warning( disable:4355 ) // 'this' : used in base member initializer list
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	213 #endif // _MSC_VER
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 SATBMarkQueueSet::SATBMarkQueueSet() :
23028 b5d14ef905b5 8078021: SATB apply_closure_to_completed_buffer should have closure argument kbarrett parents: 23027 diff changeset	216 PtrQueueSet(),
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	217 _shared_satb_queue(this, true /perm/) { }
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	218
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	219 void SATBMarkQueueSet::initialize(Monitor* cbl_mon, Mutex* fl_lock,
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	220 int process_completed_threshold,
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	221 Mutex* lock) {
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	222 PtrQueueSet::initialize(cbl_mon, fl_lock, process_completed_threshold, -1);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	223 _shared_satb_queue.set_lock(lock);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	224 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	225
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	226 void SATBMarkQueueSet::handle_zero_index_for_thread(JavaThread* t) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	227 t->satb_mark_queue().handle_zero_index();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	228 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	229
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	230 #ifdef ASSERT
17747 f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	231 void SATBMarkQueueSet::dump_active_states(bool expected_active) {
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	232 gclog_or_tty->print_cr("Expected SATB active state: %s",
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	233 expected_active ? "ACTIVE" : "INACTIVE");
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	234 gclog_or_tty->print_cr("Actual SATB active states:");
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	235 gclog_or_tty->print_cr(" Queue set: %s", is_active() ? "ACTIVE" : "INACTIVE");
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	236 for (JavaThread* t = Threads::first(); t; t = t->next()) {
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	237 gclog_or_tty->print_cr(" Thread \"%s\" queue: %s", t->name(),
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	238 t->satb_mark_queue().is_active() ? "ACTIVE" : "INACTIVE");
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	239 }
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	240 gclog_or_tty->print_cr(" Shared queue: %s",
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	241 shared_satb_queue()->is_active() ? "ACTIVE" : "INACTIVE");
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	242 }
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	243
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	244 void SATBMarkQueueSet::verify_active_states(bool expected_active) {
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	245 // Verify queue set state
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	246 if (is_active() != expected_active) {
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	247 dump_active_states(expected_active);
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	248 guarantee(false, "SATB queue set has an unexpected active state");
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	249 }
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	250
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	251 // Verify thread queue states
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	252 for (JavaThread* t = Threads::first(); t; t = t->next()) {
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	253 if (t->satb_mark_queue().is_active() != expected_active) {
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	254 dump_active_states(expected_active);
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	255 guarantee(false, "Thread SATB queue has an unexpected active state");
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	256 }
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	257 }
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	258
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	259 // Verify shared queue state
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	260 if (shared_satb_queue()->is_active() != expected_active) {
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	261 dump_active_states(expected_active);
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	262 guarantee(false, "Shared SATB queue has an unexpected active state");
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	263 }
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	264 }
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	265 #endif // ASSERT
d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	266
17747 f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	267 void SATBMarkQueueSet::set_active_all_threads(bool active, bool expected_active) {
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	268 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	269 #ifdef ASSERT
17747 f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	270 verify_active_states(expected_active);
1317 d4197f8d516a 6935821: G1: threads created during marking do not active their SATB queues tonyp parents: 1111 diff changeset	271 #endif // ASSERT
17747 f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	272 _all_active = active;
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	273 for (JavaThread* t = Threads::first(); t; t = t->next()) {
f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	274 t->satb_mark_queue().set_active(active);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	275 }
17747 f99e331f6ef6 8029162: G1: Shared SATB queue never enabled pliden parents: 6725 diff changeset	276 shared_satb_queue()->set_active(active);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	277 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	278
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	279 void SATBMarkQueueSet::filter_thread_buffers() {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	280 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	281 t->satb_mark_queue().filter();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	282 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	283 shared_satb_queue()->filter();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	284 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	285
23030 399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	286 bool SATBMarkQueueSet::apply_closure_to_completed_buffer(SATBBufferClosure* cl) {
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	287 BufferNode* nd = NULL;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	288 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	289 MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	290 if (_completed_buffers_head != NULL) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	291 nd = _completed_buffers_head;
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	292 _completed_buffers_head = nd->next();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	293 if (_completed_buffers_head == NULL) _completed_buffers_tail = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	294 _n_completed_buffers--;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	295 if (_n_completed_buffers == 0) _process_completed = false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	296 }
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 if (nd != NULL) {
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	299 void **buf = BufferNode::make_buffer_from_node(nd);
23030 399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	300 // Skip over NULL entries at beginning (e.g. push end) of buffer.
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	301 // Filtering can result in non-full completed buffers; see
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	302 // should_enqueue_buffer.
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	303 assert(_sz % sizeof(void*) == 0, "invariant");
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	304 size_t limit = ObjPtrQueue::byte_index_to_index((int)_sz);
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	305 for (size_t i = 0; i < limit; ++i) {
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	306 if (buf[i] != NULL) {
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	307 // Found the end of the block of NULLs; process the remainder.
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	308 cl->do_buffer(buf + i, limit - i);
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	309 break;
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	310 }
399885e13e90 8075215: SATB buffer processing found reclaimed humongous object kbarrett parents: 23029 diff changeset	311 }
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	312 deallocate_buffer(buf);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	313 return true;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	314 } else {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	315 return false;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	316 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	317 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	318
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	319 #ifndef PRODUCT
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	320 // Helpful for debugging
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	321
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	322 #define SATB_PRINTER_BUFFER_SIZE 256
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	323
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	324 void SATBMarkQueueSet::print_all(const char* msg) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	325 char buffer[SATB_PRINTER_BUFFER_SIZE];
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	326 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	327
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	328 gclog_or_tty->cr();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	329 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	330
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	331 BufferNode* nd = _completed_buffers_head;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	332 int i = 0;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	333 while (nd != NULL) {
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	334 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	335 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	336 ObjPtrQueue::print(buffer, buf, 0, _sz);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	337 nd = nd->next();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	338 i += 1;
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	339 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	340
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	341 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	342 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	343 t->satb_mark_queue().print(buffer);
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	344 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	345
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	346 shared_satb_queue()->print("Shared");
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	347
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	348 gclog_or_tty->cr();
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	349 }
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	350 #endif // PRODUCT
2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	351
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	352 void SATBMarkQueueSet::abandon_partial_marking() {
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	353 BufferNode* buffers_to_delete = NULL;
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	354 {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	355 MutexLockerEx x(_cbl_mon, Mutex::_no_safepoint_check_flag);
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	356 while (_completed_buffers_head != NULL) {
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	357 BufferNode* nd = _completed_buffers_head;
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	358 _completed_buffers_head = nd->next();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	359 nd->set_next(buffers_to_delete);
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	360 buffers_to_delete = nd;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	361 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	362 _completed_buffers_tail = NULL;
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	363 _n_completed_buffers = 0;
845 df6caf649ff7 6700789: G1: Enable use of compressed oops with G1 heaps ysr parents: 342 diff changeset	364 DEBUG_ONLY(assert_completed_buffer_list_len_correct_locked());
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	365 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	366 while (buffers_to_delete != NULL) {
1111 44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	367 BufferNode* nd = buffers_to_delete;
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	368 buffers_to_delete = nd->next();
44f61c24ddab 6862387: tune concurrent refinement further iveresov parents: 845 diff changeset	369 deallocate_buffer(BufferNode::make_buffer_from_node(nd));
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	370 }
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	371 assert(SafepointSynchronize::is_at_safepoint(), "Must be at safepoint.");
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	372 // So we can safely manipulate these queues.
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	373 for (JavaThread* t = Threads::first(); t; t = t->next()) {
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	374 t->satb_mark_queue().reset();
37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	375 }
4787 2ace1c4ee8da 6888336: G1: avoid explicitly marking and pushing objects in survivor spaces tonyp parents: 3979 diff changeset	376 shared_satb_queue()->reset();
342 37f87013dfd8 6711316: Open source the Garbage-First garbage collector ysr parents: diff changeset	377 }

Mercurial > hg > graal-jvmci-8

annotate src/share/vm/gc_implementation/g1/satbQueue.cpp @ 23472:047a642c9729