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

annotate src/share/vm/gc_implementation/g1/g1AllocRegion.cpp @ 4710:41406797186b

7113012: G1: rename not-fully-young GCs as "mixed" Summary: Renamed partially-young GCs as mixed and fully-young GCs as young. Change all external output that includes those terms (GC log and GC ergo log) as well as any comments, fields, methods, etc. The changeset also includes very minor code tidying up (added some curly brackets). Reviewed-by: johnc, brutisso

author	tonyp
date	Fri, 16 Dec 2011 02:14:27 -0500
parents	f44782f04dd4
children	720b6a76dd9d

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;
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	132 _count += 1;
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	133 trace("region allocation successful");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	134 return result;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	135 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	136 trace("region allocation failed");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	137 return NULL;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	138 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	139 ShouldNotReachHere();
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
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	142 void G1AllocRegion::fill_in_ext_msg(ar_ext_msg* msg, const char* message) {
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	143 msg->append("[%s] %s c: "SIZE_FORMAT" b: %s r: "PTR_FORMAT" u: "SIZE_FORMAT,
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	144 _name, message, _count, BOOL_TO_STR(_bot_updates),
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	145 _alloc_region, _used_bytes_before);
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
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	148 void G1AllocRegion::init() {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	149 trace("initializing");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	150 assert(_alloc_region == NULL && _used_bytes_before == 0,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	151 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	152 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	153 _alloc_region = _dummy_region;
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	154 _count = 0;
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	155 trace("initialized");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	156 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	157
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	158 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	159 trace("setting");
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	160 // 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	161 // 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	162 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	163 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	164 assert(_alloc_region == _dummy_region &&
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	165 _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	166 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	167
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	168 _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	169 _alloc_region = alloc_region;
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	170 _count += 1;
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	171 trace("set");
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	172 }
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	173
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	174 HeapRegion* G1AllocRegion::release() {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	175 trace("releasing");
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 retire(false /* fill_up */);
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	178 assert(_alloc_region == _dummy_region,
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	179 ar_ext_msg(this, "post-condition of retire()"));
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	180 _alloc_region = NULL;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	181 trace("released");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	182 return (alloc_region == _dummy_region) ? NULL : alloc_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	183 }
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 #if G1_ALLOC_REGION_TRACING
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	186 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	187 // 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	188 // 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	189 // skipped during level 1 tracing.
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	190 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	191 const size_t buffer_length = 128;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	192 char hr_buffer[buffer_length];
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	193 char 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 HeapRegion* alloc_region = _alloc_region;
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	196 if (alloc_region == NULL) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	197 jio_snprintf(hr_buffer, buffer_length, "NULL");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	198 } else if (alloc_region == _dummy_region) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	199 jio_snprintf(hr_buffer, buffer_length, "DUMMY");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	200 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	201 jio_snprintf(hr_buffer, buffer_length,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	202 HR_FORMAT, HR_FORMAT_PARAMS(alloc_region));
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
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	205 if (G1_ALLOC_REGION_TRACING > 1) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	206 if (result != NULL) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	207 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	208 word_size, result);
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	209 } else if (word_size != 0) {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	210 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	211 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	212 jio_snprintf(rest_buffer, buffer_length, "");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	213 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	214 } else {
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	215 jio_snprintf(rest_buffer, buffer_length, "");
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	216 }
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	217
3830 f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	218 tty->print_cr("[%s] "SIZE_FORMAT" %s : %s %s",
f44782f04dd4 7039627: G1: avoid BOT updates for survivor allocations and dirty survivor regions incrementally tonyp parents: 2433 diff changeset	219 _name, _count, hr_buffer, str, rest_buffer);
2433 abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	220 }
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 #endif // G1_ALLOC_REGION_TRACING
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	223
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	224 G1AllocRegion::G1AllocRegion(const char* name,
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	225 bool bot_updates)
abdfc822206f 7023069: G1: Introduce symmetric locking in the slow allocation path tonyp parents: diff changeset	226 : _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	227 _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	228

Mercurial > hg > truffle

annotate src/share/vm/gc_implementation/g1/g1AllocRegion.cpp @ 4710:41406797186b