comparison src/share/vm/gc_implementation/g1/g1RemSetSummary.hpp @ 4769:e72f7eecc96d

8013895: G1: G1SummarizeRSetStats output on Linux needs improvemen Summary: Fixed the output of G1SummarizeRSetStats: too small datatype for the number of concurrently processed cards, added concurrent remembered set thread time retrieval for Linux and Windows (BSD uses os::elapsedTime() now), and other cleanup. The information presented during VM operation is now relative to the previous output, not always cumulative if G1SummarizeRSetStatsPeriod > 0. At VM exit, the code prints a cumulative summary. Reviewed-by: johnc, jwilhelm
author tschatzl
date Tue, 28 May 2013 09:32:06 +0200
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children 7ec10139bf37
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-1:000000000000 0:11fc1d255c25
1 /*
2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSETSUMMARY_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSETSUMMARY_HPP
27
28 #include "utilities/ostream.hpp"
29
30 class G1RemSet;
31
32 // A G1RemSetSummary manages statistical information about the G1RemSet
33
34 class G1RemSetSummary VALUE_OBJ_CLASS_SPEC {
35 private:
36 friend class GetRSThreadVTimeClosure;
37
38 G1RemSet* _remset;
39
40 G1RemSet* remset() const {
41 return _remset;
42 }
43
44 size_t _num_refined_cards;
45 size_t _num_processed_buf_mutator;
46 size_t _num_processed_buf_rs_threads;
47
48 size_t _num_coarsenings;
49
50 double* _rs_threads_vtimes;
51 size_t _num_vtimes;
52
53 double _sampling_thread_vtime;
54
55 void set_rs_thread_vtime(uint thread, double value);
56 void set_sampling_thread_vtime(double value) {
57 _sampling_thread_vtime = value;
58 }
59
60 void free_and_null() {
61 if (_rs_threads_vtimes) {
62 FREE_C_HEAP_ARRAY(double, _rs_threads_vtimes, mtGC);
63 _rs_threads_vtimes = NULL;
64 _num_vtimes = 0;
65 }
66 }
67
68 // update this summary with current data from various places
69 void update();
70
71 public:
72 G1RemSetSummary() : _remset(NULL), _num_refined_cards(0),
73 _num_processed_buf_mutator(0), _num_processed_buf_rs_threads(0), _num_coarsenings(0),
74 _rs_threads_vtimes(NULL), _num_vtimes(0), _sampling_thread_vtime(0.0f) {
75 }
76
77 ~G1RemSetSummary() {
78 free_and_null();
79 }
80
81 // set the counters in this summary to the values of the others
82 void set(G1RemSetSummary* other);
83 // subtract all counters from the other summary, and set them in the current
84 void subtract_from(G1RemSetSummary* other);
85
86 // initialize and get the first sampling
87 void initialize(G1RemSet* remset, uint num_workers);
88
89 void print_on(outputStream* out);
90
91 double rs_thread_vtime(uint thread) const;
92
93 double sampling_thread_vtime() const {
94 return _sampling_thread_vtime;
95 }
96
97 size_t num_concurrent_refined_cards() const {
98 return _num_refined_cards;
99 }
100
101 size_t num_processed_buf_mutator() const {
102 return _num_processed_buf_mutator;
103 }
104
105 size_t num_processed_buf_rs_threads() const {
106 return _num_processed_buf_rs_threads;
107 }
108
109 size_t num_processed_buf_total() const {
110 return num_processed_buf_mutator() + num_processed_buf_rs_threads();
111 }
112
113 size_t num_coarsenings() const {
114 return _num_coarsenings;
115 }
116 };
117
118 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_G1REMSETSUMMARY_HPP