Mercurial > hg > graal-compiler
diff src/share/vm/services/mallocTracker.cpp @ 20360:833b0f92429a
8046598: Scalable Native memory tracking development
Summary: Enhance scalability of native memory tracking
Reviewed-by: coleenp, ctornqvi, gtriantafill
author | zgu |
---|---|
date | Wed, 27 Aug 2014 08:19:12 -0400 |
parents | |
children | 1ff288f0dae4 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/services/mallocTracker.cpp Wed Aug 27 08:19:12 2014 -0400 @@ -0,0 +1,200 @@ +/* + * 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 "runtime/atomic.hpp" +#include "runtime/atomic.inline.hpp" +#include "services/mallocSiteTable.hpp" +#include "services/mallocTracker.hpp" +#include "services/mallocTracker.inline.hpp" +#include "services/memTracker.hpp" + +size_t MallocMemorySummary::_snapshot[CALC_OBJ_SIZE_IN_TYPE(MallocMemorySnapshot, size_t)]; + +// Total malloc'd memory amount +size_t MallocMemorySnapshot::total() const { + size_t amount = 0; + for (int index = 0; index < mt_number_of_types; index ++) { + amount += _malloc[index].malloc_size(); + } + amount += _tracking_header.size() + total_arena(); + return amount; +} + +// Total malloc'd memory used by arenas +size_t MallocMemorySnapshot::total_arena() const { + size_t amount = 0; + for (int index = 0; index < mt_number_of_types; index ++) { + amount += _malloc[index].arena_size(); + } + return amount; +} + + +void MallocMemorySnapshot::reset() { + _tracking_header.reset(); + for (int index = 0; index < mt_number_of_types; index ++) { + _malloc[index].reset(); + } +} + +// Make adjustment by subtracting chunks used by arenas +// from total chunks to get total free chunck size +void MallocMemorySnapshot::make_adjustment() { + size_t arena_size = total_arena(); + int chunk_idx = NMTUtil::flag_to_index(mtChunk); + _malloc[chunk_idx].record_free(arena_size); +} + + +void MallocMemorySummary::initialize() { + assert(sizeof(_snapshot) >= sizeof(MallocMemorySnapshot), "Sanity Check"); + // Uses placement new operator to initialize static area. + ::new ((void*)_snapshot)MallocMemorySnapshot(); +} + +void MallocHeader::release() const { + // Tracking already shutdown, no housekeeping is needed anymore + if (MemTracker::tracking_level() <= NMT_minimal) return; + + MallocMemorySummary::record_free(size(), flags()); + MallocMemorySummary::record_free_malloc_header(sizeof(MallocHeader)); + if (tracking_level() == NMT_detail) { + MallocSiteTable::deallocation_at(size(), _bucket_idx, _pos_idx); + } +} + +bool MallocHeader::record_malloc_site(const NativeCallStack& stack, size_t size, + size_t* bucket_idx, size_t* pos_idx) const { + bool ret = MallocSiteTable::allocation_at(stack, size, bucket_idx, pos_idx); + + // Something went wrong, could be OOM or overflow malloc site table. + // We want to keep tracking data under OOM circumstance, so transition to + // summary tracking. + if (!ret) { + MemTracker::transition_to(NMT_summary); + } + return ret; +} + +bool MallocHeader::get_stack(NativeCallStack& stack) const { + return MallocSiteTable::access_stack(stack, _bucket_idx, _pos_idx); +} + +bool MallocTracker::initialize(NMT_TrackingLevel level) { + if (level >= NMT_summary) { + MallocMemorySummary::initialize(); + } + + if (level == NMT_detail) { + return MallocSiteTable::initialize(); + } + return true; +} + +bool MallocTracker::transition(NMT_TrackingLevel from, NMT_TrackingLevel to) { + assert(from != NMT_off, "Can not transition from off state"); + assert(to != NMT_off, "Can not transition to off state"); + if (from == NMT_minimal) { + MallocMemorySummary::reset(); + } + + if (to == NMT_detail) { + assert(from == NMT_minimal || from == NMT_summary, "Just check"); + return MallocSiteTable::initialize(); + } else if (from == NMT_detail) { + assert(to == NMT_minimal || to == NMT_summary, "Just check"); + MallocSiteTable::shutdown(); + } + return true; +} + +// Record a malloc memory allocation +void* MallocTracker::record_malloc(void* malloc_base, size_t size, MEMFLAGS flags, + const NativeCallStack& stack, NMT_TrackingLevel level) { + void* memblock; // the address for user data + MallocHeader* header = NULL; + + if (malloc_base == NULL) { + return NULL; + } + + // Check malloc size, size has to <= MAX_MALLOC_SIZE. This is only possible on 32-bit + // systems, when malloc size >= 1GB, but is is safe to assume it won't happen. + if (size > MAX_MALLOC_SIZE) { + fatal("Should not use malloc for big memory block, use virtual memory instead"); + } + // Uses placement global new operator to initialize malloc header + switch(level) { + case NMT_off: + return malloc_base; + case NMT_minimal: { + MallocHeader* hdr = ::new (malloc_base) MallocHeader(); + break; + } + case NMT_summary: { + header = ::new (malloc_base) MallocHeader(size, flags); + break; + } + case NMT_detail: { + header = ::new (malloc_base) MallocHeader(size, flags, stack); + break; + } + default: + ShouldNotReachHere(); + } + memblock = (void*)((char*)malloc_base + sizeof(MallocHeader)); + + // The alignment check: 8 bytes alignment for 32 bit systems. + // 16 bytes alignment for 64-bit systems. + assert(((size_t)memblock & (sizeof(size_t) * 2 - 1)) == 0, "Alignment check"); + + // Sanity check + assert(get_memory_tracking_level(memblock) == level, + "Wrong tracking level"); + +#ifdef ASSERT + if (level > NMT_minimal) { + // Read back + assert(get_size(memblock) == size, "Wrong size"); + assert(get_flags(memblock) == flags, "Wrong flags"); + } +#endif + + return memblock; +} + +void* MallocTracker::record_free(void* memblock) { + // Never turned on + if (MemTracker::tracking_level() == NMT_off || + memblock == NULL) { + return memblock; + } + MallocHeader* header = malloc_header(memblock); + header->release(); + + return (void*)header; +} + +