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view src/share/vm/services/memBaseline.cpp @ 6408:e5768e936147
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author | Christian Wimmer <christian.wimmer@oracle.com> |
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date | Fri, 14 Sep 2012 14:21:33 -0700 |
parents | d2a62e0f25eb |
children | 716c64bda5ba |
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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 "classfile/systemDictionary.hpp" #include "memory/allocation.hpp" #include "services/memBaseline.hpp" #include "services/memTracker.hpp" MemType2Name MemBaseline::MemType2NameMap[NUMBER_OF_MEMORY_TYPE] = { {mtJavaHeap, "Java Heap"}, {mtClass, "Class"}, {mtThreadStack,"Thread Stack"}, {mtThread, "Thread"}, {mtCode, "Code"}, {mtGC, "GC"}, {mtCompiler, "Compiler"}, {mtInternal, "Internal"}, {mtOther, "Other"}, {mtSymbol, "Symbol"}, {mtNMT, "Memory Tracking"}, {mtChunk, "Pooled Free Chunks"}, {mtNone, "Unknown"} // It can happen when type tagging records are lagging // behind }; MemBaseline::MemBaseline() { _baselined = false; for (int index = 0; index < NUMBER_OF_MEMORY_TYPE; index ++) { _malloc_data[index].set_type(MemType2NameMap[index]._flag); _vm_data[index].set_type(MemType2NameMap[index]._flag); _arena_data[index].set_type(MemType2NameMap[index]._flag); } _malloc_cs = NULL; _vm_cs = NULL; _number_of_classes = 0; _number_of_threads = 0; } void MemBaseline::clear() { if (_malloc_cs != NULL) { delete _malloc_cs; _malloc_cs = NULL; } if (_vm_cs != NULL) { delete _vm_cs; _vm_cs = NULL; } reset(); } void MemBaseline::reset() { _baselined = false; _total_vm_reserved = 0; _total_vm_committed = 0; _total_malloced = 0; _number_of_classes = 0; if (_malloc_cs != NULL) _malloc_cs->clear(); if (_vm_cs != NULL) _vm_cs->clear(); for (int index = 0; index < NUMBER_OF_MEMORY_TYPE; index ++) { _malloc_data[index].clear(); _vm_data[index].clear(); _arena_data[index].clear(); } } MemBaseline::~MemBaseline() { if (_malloc_cs != NULL) { delete _malloc_cs; } if (_vm_cs != NULL) { delete _vm_cs; } } // baseline malloc'd memory records, generate overall summary and summaries by // memory types bool MemBaseline::baseline_malloc_summary(const MemPointerArray* malloc_records) { MemPointerArrayIteratorImpl mItr((MemPointerArray*)malloc_records); MemPointerRecord* mptr = (MemPointerRecord*)mItr.current(); size_t used_arena_size = 0; int index; while (mptr != NULL) { index = flag2index(FLAGS_TO_MEMORY_TYPE(mptr->flags())); size_t size = mptr->size(); _total_malloced += size; _malloc_data[index].inc(size); if (MemPointerRecord::is_arena_record(mptr->flags())) { // see if arena size record present MemPointerRecord* next_p = (MemPointerRecordEx*)mItr.peek_next(); if (MemPointerRecord::is_arena_size_record(next_p->flags())) { assert(next_p->is_size_record_of_arena(mptr), "arena records do not match"); size = next_p->size(); _arena_data[index].inc(size); used_arena_size += size; mItr.next(); } } mptr = (MemPointerRecordEx*)mItr.next(); } // substract used arena size to get size of arena chunk in free list index = flag2index(mtChunk); _malloc_data[index].reduce(used_arena_size); // we really don't know how many chunks in free list, so just set to // 0 _malloc_data[index].overwrite_counter(0); return true; } // baseline mmap'd memory records, generate overall summary and summaries by // memory types bool MemBaseline::baseline_vm_summary(const MemPointerArray* vm_records) { MemPointerArrayIteratorImpl vItr((MemPointerArray*)vm_records); VMMemRegion* vptr = (VMMemRegion*)vItr.current(); int index; while (vptr != NULL) { index = flag2index(FLAGS_TO_MEMORY_TYPE(vptr->flags())); // we use the number of thread stack to count threads if (IS_MEMORY_TYPE(vptr->flags(), mtThreadStack)) { _number_of_threads ++; } _total_vm_reserved += vptr->reserved_size(); _total_vm_committed += vptr->committed_size(); _vm_data[index].inc(vptr->reserved_size(), vptr->committed_size()); vptr = (VMMemRegion*)vItr.next(); } return true; } // baseline malloc'd memory by callsites, but only the callsites with memory allocation // over 1KB are stored. bool MemBaseline::baseline_malloc_details(const MemPointerArray* malloc_records) { assert(MemTracker::track_callsite(), "detail tracking is off"); MemPointerArrayIteratorImpl mItr((MemPointerArray*)malloc_records); MemPointerRecordEx* mptr = (MemPointerRecordEx*)mItr.current(); MallocCallsitePointer mp; if (_malloc_cs == NULL) { _malloc_cs = new (std::nothrow) MemPointerArrayImpl<MallocCallsitePointer>(64); // out of native memory if (_malloc_cs == NULL) { return false; } } else { _malloc_cs->clear(); } // baseline memory that is totaled over 1 KB while (mptr != NULL) { if (!MemPointerRecord::is_arena_size_record(mptr->flags())) { // skip thread stacks if (!IS_MEMORY_TYPE(mptr->flags(), mtThreadStack)) { if (mp.addr() != mptr->pc()) { if ((mp.amount()/K) > 0) { if (!_malloc_cs->append(&mp)) { return false; } } mp = MallocCallsitePointer(mptr->pc()); } mp.inc(mptr->size()); } } mptr = (MemPointerRecordEx*)mItr.next(); } if (mp.addr() != 0 && (mp.amount()/K) > 0) { if (!_malloc_cs->append(&mp)) { return false; } } return true; } // baseline mmap'd memory by callsites bool MemBaseline::baseline_vm_details(const MemPointerArray* vm_records) { assert(MemTracker::track_callsite(), "detail tracking is off"); VMCallsitePointer vp; MemPointerArrayIteratorImpl vItr((MemPointerArray*)vm_records); VMMemRegionEx* vptr = (VMMemRegionEx*)vItr.current(); if (_vm_cs == NULL) { _vm_cs = new (std::nothrow) MemPointerArrayImpl<VMCallsitePointer>(64); if (_vm_cs == NULL) { return false; } } else { _vm_cs->clear(); } while (vptr != NULL) { if (vp.addr() != vptr->pc()) { if (!_vm_cs->append(&vp)) { return false; } vp = VMCallsitePointer(vptr->pc()); } vp.inc(vptr->size(), vptr->committed_size()); vptr = (VMMemRegionEx*)vItr.next(); } if (vp.addr() != 0) { if (!_vm_cs->append(&vp)) { return false; } } return true; } // baseline a snapshot. If summary_only = false, memory usages aggregated by // callsites are also baselined. bool MemBaseline::baseline(MemSnapshot& snapshot, bool summary_only) { MutexLockerEx snapshot_locker(snapshot._lock, true); reset(); _baselined = baseline_malloc_summary(snapshot._alloc_ptrs) && baseline_vm_summary(snapshot._vm_ptrs); _number_of_classes = SystemDictionary::number_of_classes(); if (!summary_only && MemTracker::track_callsite() && _baselined) { ((MemPointerArray*)snapshot._alloc_ptrs)->sort((FN_SORT)malloc_sort_by_pc); ((MemPointerArray*)snapshot._vm_ptrs)->sort((FN_SORT)vm_sort_by_pc); _baselined = baseline_malloc_details(snapshot._alloc_ptrs) && baseline_vm_details(snapshot._vm_ptrs); ((MemPointerArray*)snapshot._alloc_ptrs)->sort((FN_SORT)malloc_sort_by_addr); ((MemPointerArray*)snapshot._vm_ptrs)->sort((FN_SORT)vm_sort_by_addr); } return _baselined; } int MemBaseline::flag2index(MEMFLAGS flag) const { for (int index = 0; index < NUMBER_OF_MEMORY_TYPE; index ++) { if (MemType2NameMap[index]._flag == flag) { return index; } } assert(false, "no type"); return -1; } const char* MemBaseline::type2name(MEMFLAGS type) { for (int index = 0; index < NUMBER_OF_MEMORY_TYPE; index ++) { if (MemType2NameMap[index]._flag == type) { return MemType2NameMap[index]._name; } } assert(false, "no type"); return NULL; } MemBaseline& MemBaseline::operator=(const MemBaseline& other) { _total_malloced = other._total_malloced; _total_vm_reserved = other._total_vm_reserved; _total_vm_committed = other._total_vm_committed; _baselined = other._baselined; _number_of_classes = other._number_of_classes; for (int index = 0; index < NUMBER_OF_MEMORY_TYPE; index ++) { _malloc_data[index] = other._malloc_data[index]; _vm_data[index] = other._vm_data[index]; _arena_data[index] = other._arena_data[index]; } if (MemTracker::track_callsite()) { assert(_malloc_cs != NULL && _vm_cs != NULL, "out of memory"); assert(other._malloc_cs != NULL && other._vm_cs != NULL, "not properly baselined"); _malloc_cs->clear(); _vm_cs->clear(); int index; for (index = 0; index < other._malloc_cs->length(); index ++) { _malloc_cs->append(other._malloc_cs->at(index)); } for (index = 0; index < other._vm_cs->length(); index ++) { _vm_cs->append(other._vm_cs->at(index)); } } return *this; } /* compare functions for sorting */ // sort snapshot malloc'd records in callsite pc order int MemBaseline::malloc_sort_by_pc(const void* p1, const void* p2) { assert(MemTracker::track_callsite(),"Just check"); const MemPointerRecordEx* mp1 = (const MemPointerRecordEx*)p1; const MemPointerRecordEx* mp2 = (const MemPointerRecordEx*)p2; return UNSIGNED_COMPARE(mp1->pc(), mp2->pc()); } // sort baselined malloc'd records in size order int MemBaseline::bl_malloc_sort_by_size(const void* p1, const void* p2) { assert(MemTracker::is_on(), "Just check"); const MallocCallsitePointer* mp1 = (const MallocCallsitePointer*)p1; const MallocCallsitePointer* mp2 = (const MallocCallsitePointer*)p2; return UNSIGNED_COMPARE(mp2->amount(), mp1->amount()); } // sort baselined malloc'd records in callsite pc order int MemBaseline::bl_malloc_sort_by_pc(const void* p1, const void* p2) { assert(MemTracker::is_on(), "Just check"); const MallocCallsitePointer* mp1 = (const MallocCallsitePointer*)p1; const MallocCallsitePointer* mp2 = (const MallocCallsitePointer*)p2; return UNSIGNED_COMPARE(mp1->addr(), mp2->addr()); } // sort snapshot mmap'd records in callsite pc order int MemBaseline::vm_sort_by_pc(const void* p1, const void* p2) { assert(MemTracker::track_callsite(),"Just check"); const VMMemRegionEx* mp1 = (const VMMemRegionEx*)p1; const VMMemRegionEx* mp2 = (const VMMemRegionEx*)p2; return UNSIGNED_COMPARE(mp1->pc(), mp2->pc()); } // sort baselined mmap'd records in size (reserved size) order int MemBaseline::bl_vm_sort_by_size(const void* p1, const void* p2) { assert(MemTracker::is_on(), "Just check"); const VMCallsitePointer* mp1 = (const VMCallsitePointer*)p1; const VMCallsitePointer* mp2 = (const VMCallsitePointer*)p2; return UNSIGNED_COMPARE(mp2->reserved_amount(), mp1->reserved_amount()); } // sort baselined mmap'd records in callsite pc order int MemBaseline::bl_vm_sort_by_pc(const void* p1, const void* p2) { assert(MemTracker::is_on(), "Just check"); const VMCallsitePointer* mp1 = (const VMCallsitePointer*)p1; const VMCallsitePointer* mp2 = (const VMCallsitePointer*)p2; return UNSIGNED_COMPARE(mp1->addr(), mp2->addr()); } // sort snapshot malloc'd records in memory block address order int MemBaseline::malloc_sort_by_addr(const void* p1, const void* p2) { assert(MemTracker::is_on(), "Just check"); const MemPointerRecord* mp1 = (const MemPointerRecord*)p1; const MemPointerRecord* mp2 = (const MemPointerRecord*)p2; int delta = UNSIGNED_COMPARE(mp1->addr(), mp2->addr()); assert(delta != 0, "dup pointer"); return delta; } // sort snapshot mmap'd records in memory block address order int MemBaseline::vm_sort_by_addr(const void* p1, const void* p2) { assert(MemTracker::is_on(), "Just check"); const VMMemRegion* mp1 = (const VMMemRegion*)p1; const VMMemRegion* mp2 = (const VMMemRegion*)p2; int delta = UNSIGNED_COMPARE(mp1->addr(), mp2->addr()); assert(delta != 0, "dup pointer"); return delta; }