Mon, 09 Jun 2008 07:18:59 -0700
6711930: NUMA allocator: ParOld can create a hole less than minimal object size in the lgrp chunk
Summary: The fix takes care of three issues that can create a hole less a minimal object in the lgrp chunk
Reviewed-by: ysr, apetrusenko
duke@435 | 1 | /* |
duke@435 | 2 | * Copyright 2002-2004 Sun Microsystems, Inc. All Rights Reserved. |
duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
duke@435 | 4 | * |
duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
duke@435 | 7 | * published by the Free Software Foundation. |
duke@435 | 8 | * |
duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
duke@435 | 13 | * accompanied this code). |
duke@435 | 14 | * |
duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
duke@435 | 18 | * |
duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
duke@435 | 21 | * have any questions. |
duke@435 | 22 | * |
duke@435 | 23 | */ |
duke@435 | 24 | |
duke@435 | 25 | // A GSpaceCounter is a holder class for performance counters |
duke@435 | 26 | // that track a space; |
duke@435 | 27 | |
duke@435 | 28 | class GSpaceCounters: public CHeapObj { |
duke@435 | 29 | friend class VMStructs; |
duke@435 | 30 | |
duke@435 | 31 | private: |
duke@435 | 32 | PerfVariable* _capacity; |
duke@435 | 33 | PerfVariable* _used; |
duke@435 | 34 | |
duke@435 | 35 | // Constant PerfData types don't need to retain a reference. |
duke@435 | 36 | // However, it's a good idea to document them here. |
duke@435 | 37 | // PerfConstant* _size; |
duke@435 | 38 | |
duke@435 | 39 | Generation* _gen; |
duke@435 | 40 | char* _name_space; |
duke@435 | 41 | |
duke@435 | 42 | public: |
duke@435 | 43 | |
duke@435 | 44 | GSpaceCounters(const char* name, int ordinal, size_t max_size, Generation* g, |
duke@435 | 45 | GenerationCounters* gc, bool sampled=true); |
duke@435 | 46 | |
duke@435 | 47 | ~GSpaceCounters() { |
duke@435 | 48 | if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space); |
duke@435 | 49 | } |
duke@435 | 50 | |
duke@435 | 51 | inline void update_capacity() { |
duke@435 | 52 | _capacity->set_value(_gen->capacity()); |
duke@435 | 53 | } |
duke@435 | 54 | |
duke@435 | 55 | inline void update_used() { |
duke@435 | 56 | _used->set_value(_gen->used()); |
duke@435 | 57 | } |
duke@435 | 58 | |
duke@435 | 59 | // special version of update_used() to allow the used value to be |
duke@435 | 60 | // passed as a parameter. This method can can be used in cases were |
duke@435 | 61 | // the utilization is already known and/or when the _gen->used() |
duke@435 | 62 | // method is known to be expensive and we want to avoid unnecessary |
duke@435 | 63 | // calls to it. |
duke@435 | 64 | // |
duke@435 | 65 | inline void update_used(size_t used) { |
duke@435 | 66 | _used->set_value(used); |
duke@435 | 67 | } |
duke@435 | 68 | |
duke@435 | 69 | inline void inc_used(size_t size) { |
duke@435 | 70 | _used->inc(size); |
duke@435 | 71 | } |
duke@435 | 72 | |
duke@435 | 73 | debug_only( |
duke@435 | 74 | // for security reasons, we do not allow arbitrary reads from |
duke@435 | 75 | // the counters as they may live in shared memory. |
duke@435 | 76 | jlong used() { |
duke@435 | 77 | return _used->get_value(); |
duke@435 | 78 | } |
duke@435 | 79 | jlong capacity() { |
duke@435 | 80 | return _used->get_value(); |
duke@435 | 81 | } |
duke@435 | 82 | ) |
duke@435 | 83 | |
duke@435 | 84 | inline void update_all() { |
duke@435 | 85 | update_used(); |
duke@435 | 86 | update_capacity(); |
duke@435 | 87 | } |
duke@435 | 88 | |
duke@435 | 89 | const char* name_space() const { return _name_space; } |
duke@435 | 90 | }; |
duke@435 | 91 | |
duke@435 | 92 | class GenerationUsedHelper : public PerfLongSampleHelper { |
duke@435 | 93 | private: |
duke@435 | 94 | Generation* _gen; |
duke@435 | 95 | |
duke@435 | 96 | public: |
duke@435 | 97 | GenerationUsedHelper(Generation* g) : _gen(g) { } |
duke@435 | 98 | |
duke@435 | 99 | inline jlong take_sample() { |
duke@435 | 100 | return _gen->used(); |
duke@435 | 101 | } |
duke@435 | 102 | }; |