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

annotate src/share/vm/gc_implementation/g1/g1AllocRegion.cpp @ 20382:b1266b08b994

8056043: Heap does not shrink within the heap after JDK-8038423 Summary: Enable shrinking within the heap by removing some code added for JDK-8054818. Enable the test case that checks that again too. Reviewed-by: jwilhelm, jmasa

author	tschatzl
date	Wed, 03 Sep 2014 09:24:07 +0200
parents	ce8f6bb717c9
children	227a9e5e4b4a

rev	line source
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	1 /*
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 6010 diff changeset	2 * Copyright (c) 2011, 2014, Oracle and/or its affiliates. All rights reserved.
2433 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"
20197 ce8f6bb717c9 8042195: Introduce umbrella header orderAccess.inline.hpp. goetz parents: 17937 diff changeset	28 #include "runtime/orderAccess.inline.hpp"
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	29
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	30 G1CollectedHeap* G1AllocRegion::_g1h = NULL;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	31 HeapRegion* G1AllocRegion::_dummy_region = NULL;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	32
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	33 void G1AllocRegion::setup(G1CollectedHeap* g1h, HeapRegion* dummy_region) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	34 assert(_dummy_region == NULL, "should be set once");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	35 assert(dummy_region != NULL, "pre-condition");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	36 assert(dummy_region->free() == 0, "pre-condition");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	37
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	38 // 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	39 // and will not trigger any asserts.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	40 assert(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(par_allocate(dummy_region, 1, false) == NULL, "should fail");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	42 assert(allocate(dummy_region, 1, true) == NULL, "should fail");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	43 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	44
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	45 _g1h = g1h;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	46 _dummy_region = dummy_region;
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
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	49 void G1AllocRegion::fill_up_remaining_space(HeapRegion* alloc_region,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	50 bool bot_updates) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	51 assert(alloc_region != NULL && alloc_region != _dummy_region,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	52 "pre-condition");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	53
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	54 // 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	55 // 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	56 // 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	57 // 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	58 // 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	59 // 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	60 // closed to being full.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	61 size_t free_word_size = alloc_region->free() / HeapWordSize;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	62
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	63 // 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	64 // 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	65 // 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	66 // 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	67 // allocation.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	68 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	69
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	70 while (free_word_size >= min_word_size_to_fill) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	71 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	72 if (dummy != NULL) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	73 // 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	74 CollectedHeap::fill_with_object(dummy, free_word_size);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	75 alloc_region->set_pre_dummy_top(dummy);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	76 break;
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
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	79 free_word_size = alloc_region->free() / HeapWordSize;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	80 // 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	81 // 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	82 // just get out of the loop.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	83 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	84 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	85 "post-condition");
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
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	88 void G1AllocRegion::retire(bool fill_up) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	89 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	90
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	91 trace("retiring");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	92 HeapRegion* alloc_region = _alloc_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	93 if (alloc_region != _dummy_region) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	94 // 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	95 // 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	96 // it will never be empty.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	97 assert(!alloc_region->is_empty(),
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	98 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	99
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	100 if (fill_up) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	101 fill_up_remaining_space(alloc_region, _bot_updates);
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
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	104 assert(alloc_region->used() >= _used_bytes_before,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	105 ar_ext_msg(this, "invariant"));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	106 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	107 retire_region(alloc_region, allocated_bytes);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	108 _used_bytes_before = 0;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	109 _alloc_region = _dummy_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	110 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	111 trace("retired");
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
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	114 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	115 bool force) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	116 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	117 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	118
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	119 trace("attempting region allocation");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	120 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	121 if (new_alloc_region != NULL) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	122 new_alloc_region->reset_pre_dummy_top();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	123 // Need to do this before the allocation
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	124 _used_bytes_before = new_alloc_region->used();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	125 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	126 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	127
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	128 OrderAccess::storestore();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	129 // 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	130 // 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	131 // can never be empty.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	132 _alloc_region = new_alloc_region;
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	133 _count += 1;
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	134 trace("region allocation successful");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	135 return result;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	136 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	137 trace("region allocation failed");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	138 return NULL;
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 ShouldNotReachHere();
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	141 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	142
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	143 void G1AllocRegion::fill_in_ext_msg(ar_ext_msg* msg, const char* message) {
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 3830 diff changeset	144 msg->append("[%s] %s c: %u b: %s r: "PTR_FORMAT" u: "SIZE_FORMAT,
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	145 _name, message, _count, BOOL_TO_STR(_bot_updates),
17937 78bbf4d43a14 8037816: Fix for 8036122 breaks build with Xcode5/clang drchase parents: 6010 diff changeset	146 p2i(_alloc_region), _used_bytes_before);
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	147 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	148
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	149 void G1AllocRegion::init() {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	150 trace("initializing");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	151 assert(_alloc_region == NULL && _used_bytes_before == 0,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	152 ar_ext_msg(this, "pre-condition"));
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	153 assert(_dummy_region != NULL, ar_ext_msg(this, "should have been set"));
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	154 _alloc_region = _dummy_region;
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	155 _count = 0;
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	156 trace("initialized");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	157 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	158
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	159 void G1AllocRegion::set(HeapRegion* alloc_region) {
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	160 trace("setting");
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	161 // We explicitly check that the region is not empty to make sure we
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	162 // maintain the "the alloc region cannot be empty" invariant.
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	163 assert(alloc_region != NULL && !alloc_region->is_empty(),
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	164 ar_ext_msg(this, "pre-condition"));
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	165 assert(_alloc_region == _dummy_region &&
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	166 _used_bytes_before == 0 && _count == 0,
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	167 ar_ext_msg(this, "pre-condition"));
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	168
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	169 _used_bytes_before = alloc_region->used();
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	170 _alloc_region = alloc_region;
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	171 _count += 1;
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	172 trace("set");
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	173 }
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	174
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	175 HeapRegion* G1AllocRegion::release() {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	176 trace("releasing");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	177 HeapRegion* alloc_region = _alloc_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	178 retire(false /* fill_up */);
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	179 assert(_alloc_region == _dummy_region,
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	180 ar_ext_msg(this, "post-condition of retire()"));
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	181 _alloc_region = NULL;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	182 trace("released");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	183 return (alloc_region == _dummy_region) ? NULL : 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
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	187 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	188 // 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	189 // 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	190 // skipped during level 1 tracing.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	191 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	192 const size_t buffer_length = 128;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	193 char hr_buffer[buffer_length];
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	194 char rest_buffer[buffer_length];
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	195
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	196 HeapRegion* alloc_region = _alloc_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	197 if (alloc_region == NULL) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	198 jio_snprintf(hr_buffer, buffer_length, "NULL");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	199 } else if (alloc_region == _dummy_region) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	200 jio_snprintf(hr_buffer, buffer_length, "DUMMY");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	201 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	202 jio_snprintf(hr_buffer, buffer_length,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	203 HR_FORMAT, HR_FORMAT_PARAMS(alloc_region));
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	204 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	205
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	206 if (G1_ALLOC_REGION_TRACING > 1) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	207 if (result != NULL) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	208 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	209 word_size, result);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	210 } else if (word_size != 0) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	211 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	212 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	213 jio_snprintf(rest_buffer, buffer_length, "");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	214 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	215 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	216 jio_snprintf(rest_buffer, buffer_length, "");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	217 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	218
6010 720b6a76dd9d 7157073: G1: type change size_t -> uint for region counts / indexes tonyp parents: 3830 diff changeset	219 tty->print_cr("[%s] %u %s : %s %s",
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	220 _name, _count, hr_buffer, str, rest_buffer);
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	221 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	222 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	223 #endif // G1_ALLOC_REGION_TRACING
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	224
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	225 G1AllocRegion::G1AllocRegion(const char* name,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	226 bool bot_updates)
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	227 : _name(name), _bot_updates(bot_updates),
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	228 _alloc_region(NULL), _count(0), _used_bytes_before(0) { }
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	229

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/g1/g1AllocRegion.cpp @ 20382:b1266b08b994