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comparison src/share/vm/services/nmtDCmd.cpp @ 6197:d2a62e0f25eb

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6995781: Native Memory Tracking (Phase 1) 7151532: DCmd for hotspot native memory tracking Summary: Implementation of native memory tracking phase 1, which tracks VM native memory usage, and related DCmd Reviewed-by: acorn, coleenp, fparain
author zgu
date Thu, 28 Jun 2012 17:03:16 -0400
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children 3f84e17b6bca
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6174:74533f63b116 6197:d2a62e0f25eb
1 /*
2 * Copyright (c) 2012, 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 #include "precompiled.hpp"
25 #include "services/nmtDCmd.hpp"
26 #include "services/memReporter.hpp"
27 #include "services/memTracker.hpp"
28 #include "utilities/globalDefinitions.hpp"
29
30 NMTDCmd::NMTDCmd(outputStream* output,
31 bool heap): DCmdWithParser(output, heap),
32 _summary("summary", "request runtime to report current memory summary, " \
33 "which includes total reserved and committed memory, along " \
34 "with memory usage summary by each subsytem.",
35 "BOOLEAN", false, "false"),
36 _detail("detail", "request runtime to report memory allocation >= "
37 "1K by each callsite.",
38 "BOOLEAN", false, "false"),
39 _baseline("baseline", "request runtime to baseline current memory usage, " \
40 "so it can be compared against in later time.",
41 "BOOLEAN", false, "false"),
42 _summary_diff("summary.diff", "request runtime to report memory summary " \
43 "comparison against previous baseline.",
44 "BOOLEAN", false, "false"),
45 _detail_diff("detail.diff", "request runtime to report memory detail " \
46 "comparison against previous baseline, which shows the memory " \
47 "allocation activities at different callsites.",
48 "BOOLEAN", false, "false"),
49 _shutdown("shutdown", "request runtime to shutdown itself and free the " \
50 "memory used by runtime.",
51 "BOOLEAN", false, "false"),
52 #ifndef PRODUCT
53 _debug("debug", "print tracker statistics. Debug only, not thread safe", \
54 "BOOLEAN", false, "false"),
55 #endif
56 _scale("scale", "Memory usage in which scale, KB, MB or GB",
57 "STRING", false, "KB") {
58 _dcmdparser.add_dcmd_option(&_summary);
59 _dcmdparser.add_dcmd_option(&_detail);
60 _dcmdparser.add_dcmd_option(&_baseline);
61 _dcmdparser.add_dcmd_option(&_summary_diff);
62 _dcmdparser.add_dcmd_option(&_detail_diff);
63 _dcmdparser.add_dcmd_option(&_shutdown);
64 #ifndef PRODUCT
65 _dcmdparser.add_dcmd_option(&_debug);
66 #endif
67 _dcmdparser.add_dcmd_option(&_scale);
68 }
69
70 void NMTDCmd::execute(TRAPS) {
71 const char* scale_value = _scale.value();
72 size_t scale_unit;
73 if (strcmp(scale_value, "KB") == 0 || strcmp(scale_value, "kb") == 0) {
74 scale_unit = K;
75 } else if (strcmp(scale_value, "MB") == 0 ||
76 strcmp(scale_value, "mb") == 0) {
77 scale_unit = M;
78 } else if (strcmp(scale_value, "GB") == 0 ||
79 strcmp(scale_value, "gb") == 0) {
80 scale_unit = G;
81 } else {
82 output()->print_cr("Incorrect scale value: %s", scale_value);
83 return;
84 }
85
86 int nopt = 0;
87 if(_summary.is_set()) { ++nopt; }
88 if(_detail.is_set()) { ++nopt; }
89 if(_baseline.is_set()) { ++nopt; }
90 if(_summary_diff.is_set()) { ++nopt; }
91 if(_detail_diff.is_set()) { ++nopt; }
92 if(_shutdown.is_set()) { ++nopt; }
93 #ifndef PRODUCT
94 if(_debug.is_set()) { ++nopt; }
95 #endif
96
97 if(nopt > 1) {
98 output()->print_cr("At most one of the following option can be specified: " \
99 "summary, detail, baseline, summary.diff, detail.diff, shutdown"
100 #ifndef PRODUCT
101 " ,debug"
102 #endif
103 );
104 return;
105 }
106
107 if(nopt == 0) {
108 _summary.set_value(true);
109 }
110
111 #ifndef PRODUCT
112 if (_debug.value()) {
113 output()->print_cr("debug command is NOT thread-safe, may cause crash");
114 MemTracker::print_tracker_stats(output());
115 return;
116 }
117 #endif
118
119 // native memory tracking has to be on
120 if (!MemTracker::is_on() || MemTracker::shutdown_in_progress()) {
121 // if it is not on, what's the reason?
122 output()->print_cr(MemTracker::reason());
123 return;
124 }
125
126 if (_summary.value()) {
127 BaselineTTYOutputer outputer(output());
128 MemTracker::print_memory_usage(outputer, scale_unit, true);
129 } else if (_detail.value()) {
130 BaselineTTYOutputer outputer(output());
131 MemTracker::print_memory_usage(outputer, scale_unit, false);
132 } else if (_baseline.value()) {
133 if (MemTracker::baseline()) {
134 output()->print_cr("Successfully baselined.");
135 } else {
136 output()->print_cr("Baseline failed.");
137 }
138 } else if (_summary_diff.value()) {
139 if (MemTracker::has_baseline()) {
140 BaselineTTYOutputer outputer(output());
141 MemTracker::compare_memory_usage(outputer, scale_unit, true);
142 } else {
143 output()->print_cr("No baseline to compare, run 'baseline' command first");
144 }
145 } else if (_detail_diff.value()) {
146 if (MemTracker::has_baseline()) {
147 BaselineTTYOutputer outputer(output());
148 MemTracker::compare_memory_usage(outputer, scale_unit, false);
149 } else {
150 output()->print_cr("No baseline to compare to, run 'baseline' command first");
151 }
152 } else if (_shutdown.value()) {
153 MemTracker::shutdown(MemTracker::NMT_shutdown_user);
154 output()->print_cr("Shutdown is in progress, it will take a few moments to " \
155 "completely shutdown");
156 } else {
157 ShouldNotReachHere();
158 output()->print_cr("Unknown command");
159 }
160 }
161
162 int NMTDCmd::num_arguments() {
163 ResourceMark rm;
164 NMTDCmd* dcmd = new NMTDCmd(NULL, false);
165 if (dcmd != NULL) {
166 DCmdMark mark(dcmd);
167 return dcmd->_dcmdparser.num_arguments();
168 } else {
169 return 0;
170 }
171 }
172