Mercurial > hg > graal-compiler
view src/share/vm/gc_implementation/g1/concurrentMark.inline.hpp @ 3905:c26de9aef2ed
7071307: MethodHandle bimorphic inlining should consider the frequency
Reviewed-by: twisti, roland, kvn, iveresov
author | never |
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date | Fri, 02 Sep 2011 20:58:21 -0700 |
parents | 23d434c6290d |
children | 2ace1c4ee8da |
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/* * Copyright (c) 2001, 2011, 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. * */ #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARK_INLINE_HPP #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARK_INLINE_HPP #include "gc_implementation/g1/concurrentMark.hpp" #include "gc_implementation/g1/g1CollectedHeap.inline.hpp" inline void CMTask::push(oop obj) { HeapWord* objAddr = (HeapWord*) obj; assert(_g1h->is_in_g1_reserved(objAddr), "invariant"); assert(!_g1h->is_on_master_free_list( _g1h->heap_region_containing((HeapWord*) objAddr)), "invariant"); assert(!_g1h->is_obj_ill(obj), "invariant"); assert(_nextMarkBitMap->isMarked(objAddr), "invariant"); if (_cm->verbose_high()) { gclog_or_tty->print_cr("[%d] pushing "PTR_FORMAT, _task_id, (void*) obj); } if (!_task_queue->push(obj)) { // The local task queue looks full. We need to push some entries // to the global stack. if (_cm->verbose_medium()) { gclog_or_tty->print_cr("[%d] task queue overflow, " "moving entries to the global stack", _task_id); } move_entries_to_global_stack(); // this should succeed since, even if we overflow the global // stack, we should have definitely removed some entries from the // local queue. So, there must be space on it. bool success = _task_queue->push(obj); assert(success, "invariant"); } statsOnly( int tmp_size = _task_queue->size(); if (tmp_size > _local_max_size) { _local_max_size = tmp_size; } ++_local_pushes ); } // This determines whether the method below will check both the local // and global fingers when determining whether to push on the stack a // gray object (value 1) or whether it will only check the global one // (value 0). The tradeoffs are that the former will be a bit more // accurate and possibly push less on the stack, but it might also be // a little bit slower. #define _CHECK_BOTH_FINGERS_ 1 inline void CMTask::deal_with_reference(oop obj) { if (_cm->verbose_high()) { gclog_or_tty->print_cr("[%d] we're dealing with reference = "PTR_FORMAT, _task_id, (void*) obj); } ++_refs_reached; HeapWord* objAddr = (HeapWord*) obj; assert(obj->is_oop_or_null(true /* ignore mark word */), "Error"); if (_g1h->is_in_g1_reserved(objAddr)) { assert(obj != NULL, "null check is implicit"); if (!_nextMarkBitMap->isMarked(objAddr)) { // Only get the containing region if the object is not marked on the // bitmap (otherwise, it's a waste of time since we won't do // anything with it). HeapRegion* hr = _g1h->heap_region_containing_raw(obj); if (!hr->obj_allocated_since_next_marking(obj)) { if (_cm->verbose_high()) { gclog_or_tty->print_cr("[%d] "PTR_FORMAT" is not considered marked", _task_id, (void*) obj); } // we need to mark it first if (_nextMarkBitMap->parMark(objAddr)) { // No OrderAccess:store_load() is needed. It is implicit in the // CAS done in parMark(objAddr) above HeapWord* global_finger = _cm->finger(); #if _CHECK_BOTH_FINGERS_ // we will check both the local and global fingers if (_finger != NULL && objAddr < _finger) { if (_cm->verbose_high()) { gclog_or_tty->print_cr("[%d] below the local finger ("PTR_FORMAT"), " "pushing it", _task_id, _finger); } push(obj); } else if (_curr_region != NULL && objAddr < _region_limit) { // do nothing } else if (objAddr < global_finger) { // Notice that the global finger might be moving forward // concurrently. This is not a problem. In the worst case, we // mark the object while it is above the global finger and, by // the time we read the global finger, it has moved forward // passed this object. In this case, the object will probably // be visited when a task is scanning the region and will also // be pushed on the stack. So, some duplicate work, but no // correctness problems. if (_cm->verbose_high()) { gclog_or_tty->print_cr("[%d] below the global finger " "("PTR_FORMAT"), pushing it", _task_id, global_finger); } push(obj); } else { // do nothing } #else // _CHECK_BOTH_FINGERS_ // we will only check the global finger if (objAddr < global_finger) { // see long comment above if (_cm->verbose_high()) { gclog_or_tty->print_cr("[%d] below the global finger " "("PTR_FORMAT"), pushing it", _task_id, global_finger); } push(obj); } #endif // _CHECK_BOTH_FINGERS_ } } } } } #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARK_INLINE_HPP