1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/gc_implementation/shared/gSpaceCounters.hpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,114 @@
1.4 +/*
1.5 + * Copyright (c) 2002, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_GSPACECOUNTERS_HPP
1.29 +#define SHARE_VM_GC_IMPLEMENTATION_SHARED_GSPACECOUNTERS_HPP
1.30 +
1.31 +#include "utilities/macros.hpp"
1.32 +#if INCLUDE_ALL_GCS
1.33 +#include "gc_implementation/shared/generationCounters.hpp"
1.34 +#include "memory/generation.hpp"
1.35 +#include "runtime/perfData.hpp"
1.36 +#endif // INCLUDE_ALL_GCS
1.37 +
1.38 +// A GSpaceCounter is a holder class for performance counters
1.39 +// that track a space;
1.40 +
1.41 +class GSpaceCounters: public CHeapObj<mtGC> {
1.42 + friend class VMStructs;
1.43 +
1.44 + private:
1.45 + PerfVariable* _capacity;
1.46 + PerfVariable* _used;
1.47 +
1.48 + // Constant PerfData types don't need to retain a reference.
1.49 + // However, it's a good idea to document them here.
1.50 + // PerfConstant* _size;
1.51 +
1.52 + Generation* _gen;
1.53 + char* _name_space;
1.54 +
1.55 + public:
1.56 +
1.57 + GSpaceCounters(const char* name, int ordinal, size_t max_size, Generation* g,
1.58 + GenerationCounters* gc, bool sampled=true);
1.59 +
1.60 + ~GSpaceCounters() {
1.61 + if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space, mtGC);
1.62 + }
1.63 +
1.64 + inline void update_capacity() {
1.65 + _capacity->set_value(_gen->capacity());
1.66 + }
1.67 +
1.68 + inline void update_used() {
1.69 + _used->set_value(_gen->used());
1.70 + }
1.71 +
1.72 + // special version of update_used() to allow the used value to be
1.73 + // passed as a parameter. This method can can be used in cases were
1.74 + // the utilization is already known and/or when the _gen->used()
1.75 + // method is known to be expensive and we want to avoid unnecessary
1.76 + // calls to it.
1.77 + //
1.78 + inline void update_used(size_t used) {
1.79 + _used->set_value(used);
1.80 + }
1.81 +
1.82 + inline void inc_used(size_t size) {
1.83 + _used->inc(size);
1.84 + }
1.85 +
1.86 + debug_only(
1.87 + // for security reasons, we do not allow arbitrary reads from
1.88 + // the counters as they may live in shared memory.
1.89 + jlong used() {
1.90 + return _used->get_value();
1.91 + }
1.92 + jlong capacity() {
1.93 + return _used->get_value();
1.94 + }
1.95 + )
1.96 +
1.97 + inline void update_all() {
1.98 + update_used();
1.99 + update_capacity();
1.100 + }
1.101 +
1.102 + const char* name_space() const { return _name_space; }
1.103 +};
1.104 +
1.105 +class GenerationUsedHelper : public PerfLongSampleHelper {
1.106 + private:
1.107 + Generation* _gen;
1.108 +
1.109 + public:
1.110 + GenerationUsedHelper(Generation* g) : _gen(g) { }
1.111 +
1.112 + inline jlong take_sample() {
1.113 + return _gen->used();
1.114 + }
1.115 +};
1.116 +
1.117 +#endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_GSPACECOUNTERS_HPP
