Mercurial > hg > truffle
view src/share/vm/gc_implementation/g1/g1Allocator.cpp @ 21007:f84166ee0798
removed application of NodeIntrinsificationPhase in ReplacementsImpl since node intrinsification is always done during graph parsing now
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 17 Apr 2015 17:13:09 +0200 |
parents | 227a9e5e4b4a |
children |
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/* * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "gc_implementation/g1/g1Allocator.hpp" #include "gc_implementation/g1/g1CollectedHeap.hpp" #include "gc_implementation/g1/g1CollectorPolicy.hpp" #include "gc_implementation/g1/heapRegion.inline.hpp" #include "gc_implementation/g1/heapRegionSet.inline.hpp" void G1DefaultAllocator::init_mutator_alloc_region() { assert(_mutator_alloc_region.get() == NULL, "pre-condition"); _mutator_alloc_region.init(); } void G1DefaultAllocator::release_mutator_alloc_region() { _mutator_alloc_region.release(); assert(_mutator_alloc_region.get() == NULL, "post-condition"); } void G1Allocator::reuse_retained_old_region(EvacuationInfo& evacuation_info, OldGCAllocRegion* old, HeapRegion** retained_old) { HeapRegion* retained_region = *retained_old; *retained_old = NULL; // We will discard the current GC alloc region if: // a) it's in the collection set (it can happen!), // b) it's already full (no point in using it), // c) it's empty (this means that it was emptied during // a cleanup and it should be on the free list now), or // d) it's humongous (this means that it was emptied // during a cleanup and was added to the free list, but // has been subsequently used to allocate a humongous // object that may be less than the region size). if (retained_region != NULL && !retained_region->in_collection_set() && !(retained_region->top() == retained_region->end()) && !retained_region->is_empty() && !retained_region->isHumongous()) { retained_region->record_top_and_timestamp(); // The retained region was added to the old region set when it was // retired. We have to remove it now, since we don't allow regions // we allocate to in the region sets. We'll re-add it later, when // it's retired again. _g1h->_old_set.remove(retained_region); bool during_im = _g1h->g1_policy()->during_initial_mark_pause(); retained_region->note_start_of_copying(during_im); old->set(retained_region); _g1h->_hr_printer.reuse(retained_region); evacuation_info.set_alloc_regions_used_before(retained_region->used()); } } void G1DefaultAllocator::init_gc_alloc_regions(EvacuationInfo& evacuation_info) { assert_at_safepoint(true /* should_be_vm_thread */); _survivor_gc_alloc_region.init(); _old_gc_alloc_region.init(); reuse_retained_old_region(evacuation_info, &_old_gc_alloc_region, &_retained_old_gc_alloc_region); } void G1DefaultAllocator::release_gc_alloc_regions(uint no_of_gc_workers, EvacuationInfo& evacuation_info) { AllocationContext_t context = AllocationContext::current(); evacuation_info.set_allocation_regions(survivor_gc_alloc_region(context)->count() + old_gc_alloc_region(context)->count()); survivor_gc_alloc_region(context)->release(); // If we have an old GC alloc region to release, we'll save it in // _retained_old_gc_alloc_region. If we don't // _retained_old_gc_alloc_region will become NULL. This is what we // want either way so no reason to check explicitly for either // condition. _retained_old_gc_alloc_region = old_gc_alloc_region(context)->release(); if (ResizePLAB) { _g1h->_survivor_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); _g1h->_old_plab_stats.adjust_desired_plab_sz(no_of_gc_workers); } } void G1DefaultAllocator::abandon_gc_alloc_regions() { assert(survivor_gc_alloc_region(AllocationContext::current())->get() == NULL, "pre-condition"); assert(old_gc_alloc_region(AllocationContext::current())->get() == NULL, "pre-condition"); _retained_old_gc_alloc_region = NULL; } G1ParGCAllocBuffer::G1ParGCAllocBuffer(size_t gclab_word_size) : ParGCAllocBuffer(gclab_word_size), _retired(true) { } HeapWord* G1ParGCAllocator::allocate_slow(GCAllocPurpose purpose, size_t word_sz, AllocationContext_t context) { HeapWord* obj = NULL; size_t gclab_word_size = _g1h->desired_plab_sz(purpose); if (word_sz * 100 < gclab_word_size * ParallelGCBufferWastePct) { G1ParGCAllocBuffer* alloc_buf = alloc_buffer(purpose, context); add_to_alloc_buffer_waste(alloc_buf->words_remaining()); alloc_buf->retire(false /* end_of_gc */, false /* retain */); HeapWord* buf = _g1h->par_allocate_during_gc(purpose, gclab_word_size, context); if (buf == NULL) { return NULL; // Let caller handle allocation failure. } // Otherwise. alloc_buf->set_word_size(gclab_word_size); alloc_buf->set_buf(buf); obj = alloc_buf->allocate(word_sz); assert(obj != NULL, "buffer was definitely big enough..."); } else { obj = _g1h->par_allocate_during_gc(purpose, word_sz, context); } return obj; } G1DefaultParGCAllocator::G1DefaultParGCAllocator(G1CollectedHeap* g1h) : G1ParGCAllocator(g1h), _surviving_alloc_buffer(g1h->desired_plab_sz(GCAllocForSurvived)), _tenured_alloc_buffer(g1h->desired_plab_sz(GCAllocForTenured)) { _alloc_buffers[GCAllocForSurvived] = &_surviving_alloc_buffer; _alloc_buffers[GCAllocForTenured] = &_tenured_alloc_buffer; } void G1DefaultParGCAllocator::retire_alloc_buffers() { for (int ap = 0; ap < GCAllocPurposeCount; ++ap) { size_t waste = _alloc_buffers[ap]->words_remaining(); add_to_alloc_buffer_waste(waste); _alloc_buffers[ap]->flush_stats_and_retire(_g1h->stats_for_purpose((GCAllocPurpose)ap), true /* end_of_gc */, false /* retain */); } }