graal-jvmci-8: src/share/vm/gc_implementation/g1/g1AllocRegion.cpp annotate

annotate src/share/vm/gc_implementation/g1/g1AllocRegion.cpp @ 3777:e8b0b0392037

7046182: G1: remove unnecessary iterations over the collection set Summary: Remove two unnecessary iterations over the collection set which are supposed to prepare the RSet's of the CSet regions for parallel iterations (we'll make sure this is done incrementally). I'll piggyback on this CR the removal of the G1_REM_SET_LOGGING code. Reviewed-by: brutisso, johnc

author	tonyp
date	Tue, 21 Jun 2011 15:23:07 -0400
parents	abdfc822206f
children	f44782f04dd4

rev	line source
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	1 /*
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	4 *
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	5 * This code is free software; you can redistribute it and/or modify it
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	6 * under the terms of the GNU General Public License version 2 only, as
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	7 * published by the Free Software Foundation.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	8 *
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	9 * This code is distributed in the hope that it will be useful, but WITHOUT
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	12 * version 2 for more details (a copy is included in the LICENSE file that
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	13 * accompanied this code).
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	14 *
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	15 * You should have received a copy of the GNU General Public License version
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	16 * 2 along with this work; if not, write to the Free Software Foundation,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	18 *
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	20 * or visit www.oracle.com if you need additional information or have any
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	21 * questions.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	22 *
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	23 */
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	24
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	25 #include "precompiled.hpp"
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	26 #include "gc_implementation/g1/g1AllocRegion.inline.hpp"
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	27 #include "gc_implementation/g1/g1CollectedHeap.inline.hpp"
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	28
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	29 G1CollectedHeap* G1AllocRegion::_g1h = NULL;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	30 HeapRegion* G1AllocRegion::_dummy_region = NULL;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	31
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	32 void G1AllocRegion::setup(G1CollectedHeap* g1h, HeapRegion* dummy_region) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	33 assert(_dummy_region == NULL, "should be set once");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	34 assert(dummy_region != NULL, "pre-condition");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	35 assert(dummy_region->free() == 0, "pre-condition");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	36
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	37 // Make sure that any allocation attempt on this region will fail
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	38 // and will not trigger any asserts.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	39 assert(allocate(dummy_region, 1, false) == NULL, "should fail");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	40 assert(par_allocate(dummy_region, 1, false) == NULL, "should fail");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	41 assert(allocate(dummy_region, 1, true) == NULL, "should fail");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	42 assert(par_allocate(dummy_region, 1, true) == NULL, "should fail");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	43
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	44 _g1h = g1h;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	45 _dummy_region = dummy_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	46 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	47
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	48 void G1AllocRegion::fill_up_remaining_space(HeapRegion* alloc_region,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	49 bool bot_updates) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	50 assert(alloc_region != NULL && alloc_region != _dummy_region,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	51 "pre-condition");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	52
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	53 // Other threads might still be trying to allocate using a CAS out
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	54 // of the region we are trying to retire, as they can do so without
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	55 // holding the lock. So, we first have to make sure that noone else
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	56 // can allocate out of it by doing a maximal allocation. Even if our
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	57 // CAS attempt fails a few times, we'll succeed sooner or later
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	58 // given that failed CAS attempts mean that the region is getting
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	59 // closed to being full.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	60 size_t free_word_size = alloc_region->free() / HeapWordSize;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	61
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	62 // This is the minimum free chunk we can turn into a dummy
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	63 // object. If the free space falls below this, then noone can
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	64 // allocate in this region anyway (all allocation requests will be
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	65 // of a size larger than this) so we won't have to perform the dummy
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	66 // allocation.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	67 size_t min_word_size_to_fill = CollectedHeap::min_fill_size();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	68
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	69 while (free_word_size >= min_word_size_to_fill) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	70 HeapWord* dummy = par_allocate(alloc_region, free_word_size, bot_updates);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	71 if (dummy != NULL) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	72 // If the allocation was successful we should fill in the space.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	73 CollectedHeap::fill_with_object(dummy, free_word_size);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	74 alloc_region->set_pre_dummy_top(dummy);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	75 break;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	76 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	77
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	78 free_word_size = alloc_region->free() / HeapWordSize;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	79 // It's also possible that someone else beats us to the
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	80 // allocation and they fill up the region. In that case, we can
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	81 // just get out of the loop.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	82 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	83 assert(alloc_region->free() / HeapWordSize < min_word_size_to_fill,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	84 "post-condition");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	85 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	86
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	87 void G1AllocRegion::retire(bool fill_up) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	88 assert(_alloc_region != NULL, ar_ext_msg(this, "not initialized properly"));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	89
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	90 trace("retiring");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	91 HeapRegion* alloc_region = _alloc_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	92 if (alloc_region != _dummy_region) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	93 // We never have to check whether the active region is empty or not,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	94 // and potentially free it if it is, given that it's guaranteed that
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	95 // it will never be empty.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	96 assert(!alloc_region->is_empty(),
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	97 ar_ext_msg(this, "the alloc region should never be empty"));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	98
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	99 if (fill_up) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	100 fill_up_remaining_space(alloc_region, _bot_updates);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	101 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	102
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	103 assert(alloc_region->used() >= _used_bytes_before,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	104 ar_ext_msg(this, "invariant"));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	105 size_t allocated_bytes = alloc_region->used() - _used_bytes_before;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	106 retire_region(alloc_region, allocated_bytes);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	107 _used_bytes_before = 0;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	108 _alloc_region = _dummy_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	109 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	110 trace("retired");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	111 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	112
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	113 HeapWord* G1AllocRegion::new_alloc_region_and_allocate(size_t word_size,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	114 bool force) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	115 assert(_alloc_region == _dummy_region, ar_ext_msg(this, "pre-condition"));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	116 assert(_used_bytes_before == 0, ar_ext_msg(this, "pre-condition"));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	117
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	118 trace("attempting region allocation");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	119 HeapRegion* new_alloc_region = allocate_new_region(word_size, force);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	120 if (new_alloc_region != NULL) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	121 new_alloc_region->reset_pre_dummy_top();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	122 // Need to do this before the allocation
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	123 _used_bytes_before = new_alloc_region->used();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	124 HeapWord* result = allocate(new_alloc_region, word_size, _bot_updates);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	125 assert(result != NULL, ar_ext_msg(this, "the allocation should succeeded"));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	126
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	127 OrderAccess::storestore();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	128 // Note that we first perform the allocation and then we store the
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	129 // region in _alloc_region. This is the reason why an active region
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	130 // can never be empty.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	131 _alloc_region = new_alloc_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	132 trace("region allocation successful");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	133 return result;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	134 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	135 trace("region allocation failed");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	136 return NULL;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	137 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	138 ShouldNotReachHere();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	139 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	140
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	141 void G1AllocRegion::fill_in_ext_msg(ar_ext_msg* msg, const char* message) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	142 msg->append("[%s] %s b: %s r: "PTR_FORMAT" u: "SIZE_FORMAT,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	143 _name, message, BOOL_TO_STR(_bot_updates),
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	144 _alloc_region, _used_bytes_before);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	145 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	146
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	147 void G1AllocRegion::init() {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	148 trace("initializing");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	149 assert(_alloc_region == NULL && _used_bytes_before == 0,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	150 ar_ext_msg(this, "pre-condition"));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	151 assert(_dummy_region != NULL, "should have been set");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	152 _alloc_region = _dummy_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	153 trace("initialized");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	154 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	155
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	156 HeapRegion* G1AllocRegion::release() {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	157 trace("releasing");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	158 HeapRegion* alloc_region = _alloc_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	159 retire(false /* fill_up */);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	160 assert(_alloc_region == _dummy_region, "post-condition of retire()");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	161 _alloc_region = NULL;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	162 trace("released");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	163 return (alloc_region == _dummy_region) ? NULL : alloc_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	164 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	165
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	166 #if G1_ALLOC_REGION_TRACING
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	167 void G1AllocRegion::trace(const char* str, size_t word_size, HeapWord* result) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	168 // All the calls to trace that set either just the size or the size
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	169 // and the result are considered part of level 2 tracing and are
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	170 // skipped during level 1 tracing.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	171 if ((word_size == 0 && result == NULL) \|\| (G1_ALLOC_REGION_TRACING > 1)) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	172 const size_t buffer_length = 128;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	173 char hr_buffer[buffer_length];
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	174 char rest_buffer[buffer_length];
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	175
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	176 HeapRegion* alloc_region = _alloc_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	177 if (alloc_region == NULL) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	178 jio_snprintf(hr_buffer, buffer_length, "NULL");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	179 } else if (alloc_region == _dummy_region) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	180 jio_snprintf(hr_buffer, buffer_length, "DUMMY");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	181 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	182 jio_snprintf(hr_buffer, buffer_length,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	183 HR_FORMAT, HR_FORMAT_PARAMS(alloc_region));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	184 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	185
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	186 if (G1_ALLOC_REGION_TRACING > 1) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	187 if (result != NULL) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	188 jio_snprintf(rest_buffer, buffer_length, SIZE_FORMAT" "PTR_FORMAT,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	189 word_size, result);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	190 } else if (word_size != 0) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	191 jio_snprintf(rest_buffer, buffer_length, SIZE_FORMAT, word_size);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	192 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	193 jio_snprintf(rest_buffer, buffer_length, "");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	194 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	195 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	196 jio_snprintf(rest_buffer, buffer_length, "");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	197 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	198
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	199 tty->print_cr("[%s] %s : %s %s", _name, hr_buffer, str, rest_buffer);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	200 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	201 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	202 #endif // G1_ALLOC_REGION_TRACING
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	203
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	204 G1AllocRegion::G1AllocRegion(const char* name,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	205 bool bot_updates)
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	206 : _name(name), _bot_updates(bot_updates),
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	207 _alloc_region(NULL), _used_bytes_before(0) { }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	208

Mercurial > hg > graal-jvmci-8

annotate src/share/vm/gc_implementation/g1/g1AllocRegion.cpp @ 3777:e8b0b0392037