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view src/share/vm/gc_implementation/shared/hSpaceCounters.cpp @ 3766:c3f1170908be
7045330: G1: Simplify/fix the HeapRegionSeq class
7042285: G1: native memory leak during humongous object allocation
6804436: G1: heap region indices should be size_t
Summary: A series of fixes and improvements to the HeapRegionSeq class: a) replace the _regions growable array with a standard C array, b) avoid de-allocating / re-allocating HeapRegion instances when the heap shrinks / grows (fix for 7042285), c) introduce fast method to map address to HeapRegion via a "biased" array pointer, d) embed the _hrs object in G1CollectedHeap, instead of pointing to it via an indirection, e) assume that all the regions added to the HeapRegionSeq instance are contiguous, f) replace int's with size_t's for indexes (and expand that to HeapRegion as part of 6804436), g) remove unnecessary / unused methods, h) rename a couple of fields (_alloc_search_start and _seq_bottom), i) fix iterate_from() not to always start from index 0 irrespective of the region passed to it, j) add a verification method to check the HeapRegionSeq assumptions, k) always call the wrappers for _hrs.iterate(), _hrs_length(), and _hrs.at() from G1CollectedHeap, not those methods directly, and l) unify the code that expands the sequence (by either re-using or creating a new HeapRegion) and make it robust wrt to a HeapRegion allocation failing.
Reviewed-by: stefank, johnc, brutisso
author | tonyp |
---|---|
date | Fri, 10 Jun 2011 13:16:40 -0400 |
parents | b52782ae3880 |
children | d2a62e0f25eb |
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/* * Copyright (c) 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. * */ #include "precompiled.hpp" #include "gc_implementation/shared/hSpaceCounters.hpp" #include "memory/generation.hpp" #include "memory/resourceArea.hpp" HSpaceCounters::HSpaceCounters(const char* name, int ordinal, size_t max_size, size_t initial_capacity, GenerationCounters* gc) { if (UsePerfData) { EXCEPTION_MARK; ResourceMark rm; const char* cns = PerfDataManager::name_space(gc->name_space(), "space", ordinal); _name_space = NEW_C_HEAP_ARRAY(char, strlen(cns)+1); strcpy(_name_space, cns); const char* cname = PerfDataManager::counter_name(_name_space, "name"); PerfDataManager::create_string_constant(SUN_GC, cname, name, CHECK); cname = PerfDataManager::counter_name(_name_space, "maxCapacity"); PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_Bytes, (jlong)max_size, CHECK); cname = PerfDataManager::counter_name(_name_space, "capacity"); _capacity = PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, initial_capacity, CHECK); cname = PerfDataManager::counter_name(_name_space, "used"); _used = PerfDataManager::create_variable(SUN_GC, cname, PerfData::U_Bytes, (jlong) 0, CHECK); cname = PerfDataManager::counter_name(_name_space, "initCapacity"); PerfDataManager::create_constant(SUN_GC, cname, PerfData::U_Bytes, initial_capacity, CHECK); } }