truffle: src/share/vm/gc_implementation/g1/g1AllocRegion.cpp annotate

annotate src/share/vm/gc_implementation/g1/g1AllocRegion.cpp @ 2433:abdfc822206f

7023069: G1: Introduce symmetric locking in the slow allocation path 7023151: G1: refactor the code that operates on _cur_alloc_region to be re-used for allocs by the GC threads 7018286: G1: humongous allocation attempts should take the GC locker into account Summary: First, this change replaces the asymmetric locking scheme in the G1 slow alloc path by a summetric one. Second, it factors out the code that operates on _cur_alloc_region so that it can be re-used for allocations by the GC threads in the future. Reviewed-by: stefank, brutisso, johnc

author	tonyp
date	Wed, 30 Mar 2011 10:26:59 -0400
parents
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 > truffle

annotate src/share/vm/gc_implementation/g1/g1AllocRegion.cpp @ 2433:abdfc822206f