Mercurial > hg > truffle
view src/share/vm/services/memRecorder.cpp @ 8733:9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
Summary: Update the task local finger to the start of the next object when marking aborts, in order to avoid the redundant scanning of all 0's when the marking task restarts, if otherwise updating to the next word. In addition, reuse the routine nextObject() in routine iterate().
Reviewed-by: johnc, ysr
Contributed-by: tamao <tao.mao@oracle.com>
author | tamao |
---|---|
date | Tue, 05 Mar 2013 15:36:56 -0800 |
parents | 4102b59539ce |
children | 1f4355cee9a2 |
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/* * Copyright (c) 2012, 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 "runtime/atomic.hpp" #include "services/memBaseline.hpp" #include "services/memRecorder.hpp" #include "services/memPtr.hpp" #include "services/memTracker.hpp" MemPointer* SequencedRecordIterator::next_record() { MemPointerRecord* itr_cur = (MemPointerRecord*)_itr.current(); if (itr_cur == NULL) { return itr_cur; } MemPointerRecord* itr_next = (MemPointerRecord*)_itr.next(); // don't collapse virtual memory records while (itr_next != NULL && !itr_cur->is_vm_pointer() && !itr_next->is_vm_pointer() && same_kind(itr_cur, itr_next)) { itr_cur = itr_next; itr_next = (MemPointerRecord*)_itr.next(); } return itr_cur; } volatile jint MemRecorder::_instance_count = 0; MemRecorder::MemRecorder() { assert(MemTracker::is_on(), "Native memory tracking is off"); Atomic::inc(&_instance_count); set_generation(); if (MemTracker::track_callsite()) { _pointer_records = new (std::nothrow)FixedSizeMemPointerArray<SeqMemPointerRecordEx, DEFAULT_RECORDER_PTR_ARRAY_SIZE>(); } else { _pointer_records = new (std::nothrow)FixedSizeMemPointerArray<SeqMemPointerRecord, DEFAULT_RECORDER_PTR_ARRAY_SIZE>(); } _next = NULL; if (_pointer_records != NULL) { // recode itself record((address)this, (MemPointerRecord::malloc_tag()|mtNMT|otNMTRecorder), sizeof(MemRecorder), CALLER_PC); record((address)_pointer_records, (MemPointerRecord::malloc_tag()|mtNMT|otNMTRecorder), _pointer_records->instance_size(),CURRENT_PC); } } MemRecorder::~MemRecorder() { if (_pointer_records != NULL) { if (MemTracker::is_on()) { MemTracker::record_free((address)_pointer_records, mtNMT); MemTracker::record_free((address)this, mtNMT); } delete _pointer_records; } // delete all linked recorders while (_next != NULL) { MemRecorder* tmp = _next; _next = _next->next(); tmp->set_next(NULL); delete tmp; } Atomic::dec(&_instance_count); } // Sorting order: // 1. memory block address // 2. mem pointer record tags // 3. sequence number int MemRecorder::sort_record_fn(const void* e1, const void* e2) { const MemPointerRecord* p1 = (const MemPointerRecord*)e1; const MemPointerRecord* p2 = (const MemPointerRecord*)e2; int delta = UNSIGNED_COMPARE(p1->addr(), p2->addr()); if (delta == 0) { int df = UNSIGNED_COMPARE((p1->flags() & MemPointerRecord::tag_masks), (p2->flags() & MemPointerRecord::tag_masks)); if (df == 0) { assert(p1->seq() != p2->seq(), "dup seq"); return p1->seq() - p2->seq(); } else { return df; } } else { return delta; } } bool MemRecorder::record(address p, MEMFLAGS flags, size_t size, address pc) { #ifdef ASSERT if (MemPointerRecord::is_virtual_memory_record(flags)) { assert((flags & MemPointerRecord::tag_masks) != 0, "bad virtual memory record"); } else { assert((flags & MemPointerRecord::tag_masks) == MemPointerRecord::malloc_tag() || (flags & MemPointerRecord::tag_masks) == MemPointerRecord::free_tag() || IS_ARENA_OBJ(flags), "bad malloc record"); } // a recorder should only hold records within the same generation unsigned long cur_generation = SequenceGenerator::current_generation(); assert(cur_generation == _generation, "this thread did not enter sync point"); #endif if (MemTracker::track_callsite()) { SeqMemPointerRecordEx ap(p, flags, size, pc); debug_only(check_dup_seq(ap.seq());) return _pointer_records->append(&ap); } else { SeqMemPointerRecord ap(p, flags, size); debug_only(check_dup_seq(ap.seq());) return _pointer_records->append(&ap); } } // iterator for alloc pointers SequencedRecordIterator MemRecorder::pointer_itr() { assert(_pointer_records != NULL, "just check"); _pointer_records->sort((FN_SORT)sort_record_fn); return SequencedRecordIterator(_pointer_records); } void MemRecorder::set_generation() { _generation = SequenceGenerator::current_generation(); } #ifdef ASSERT void MemRecorder::check_dup_seq(jint seq) const { MemPointerArrayIteratorImpl itr(_pointer_records); MemPointerRecord* rc = (MemPointerRecord*)itr.current(); while (rc != NULL) { assert(rc->seq() != seq, "dup seq"); rc = (MemPointerRecord*)itr.next(); } } #endif