|
342
|
1 /*
|
|
|
2 * Copyright 2001-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
|
|
|
20 * CA 95054 USA or visit www.sun.com if you need additional information or
|
|
|
21 * have any questions.
|
|
|
22 *
|
|
|
23 */
|
|
|
24
|
|
|
25 # include "incls/_precompiled.incl"
|
|
|
26 # include "incls/_coTracker.cpp.incl"
|
|
|
27
|
|
|
28 COTracker* COTracker::_head = NULL;
|
|
|
29 double COTracker::_cpu_number = -1.0;
|
|
|
30
|
|
|
31 void
|
|
|
32 COTracker::resetPeriod(double now_sec, double vnow_sec) {
|
|
|
33 guarantee( _enabled, "invariant" );
|
|
|
34 _period_start_time_sec = now_sec;
|
|
|
35 _period_start_vtime_sec = vnow_sec;
|
|
|
36 }
|
|
|
37
|
|
|
38 void
|
|
|
39 COTracker::setConcOverhead(double time_stamp_sec,
|
|
|
40 double conc_overhead) {
|
|
|
41 guarantee( _enabled, "invariant" );
|
|
|
42 _conc_overhead = conc_overhead;
|
|
|
43 _time_stamp_sec = time_stamp_sec;
|
|
|
44 if (conc_overhead > 0.001)
|
|
|
45 _conc_overhead_seq.add(conc_overhead);
|
|
|
46 }
|
|
|
47
|
|
|
48 void
|
|
|
49 COTracker::reset(double starting_conc_overhead) {
|
|
|
50 guarantee( _enabled, "invariant" );
|
|
|
51 double now_sec = os::elapsedTime();
|
|
|
52 setConcOverhead(now_sec, starting_conc_overhead);
|
|
|
53 }
|
|
|
54
|
|
|
55 void
|
|
|
56 COTracker::start() {
|
|
|
57 guarantee( _enabled, "invariant" );
|
|
|
58 resetPeriod(os::elapsedTime(), os::elapsedVTime());
|
|
|
59 }
|
|
|
60
|
|
|
61 void
|
|
|
62 COTracker::update(bool force_end) {
|
|
|
63 assert( _enabled, "invariant" );
|
|
|
64 double end_time_sec = os::elapsedTime();
|
|
|
65 double elapsed_time_sec = end_time_sec - _period_start_time_sec;
|
|
|
66 if (force_end || elapsed_time_sec > _update_period_sec) {
|
|
|
67 // reached the end of the period
|
|
|
68 double end_vtime_sec = os::elapsedVTime();
|
|
|
69 double elapsed_vtime_sec = end_vtime_sec - _period_start_vtime_sec;
|
|
|
70
|
|
|
71 double conc_overhead = elapsed_vtime_sec / elapsed_time_sec;
|
|
|
72
|
|
|
73 setConcOverhead(end_time_sec, conc_overhead);
|
|
|
74 resetPeriod(end_time_sec, end_vtime_sec);
|
|
|
75 }
|
|
|
76 }
|
|
|
77
|
|
|
78 void
|
|
|
79 COTracker::updateForSTW(double start_sec, double end_sec) {
|
|
|
80 if (!_enabled)
|
|
|
81 return;
|
|
|
82
|
|
|
83 // During a STW pause, no concurrent GC thread has done any
|
|
|
84 // work. So, we can safely adjust the start of the current period by
|
|
|
85 // adding the duration of the STW pause to it, so that the STW pause
|
|
|
86 // doesn't affect the reading of the concurrent overhead (it's
|
|
|
87 // basically like excluding the time of the STW pause from the
|
|
|
88 // concurrent overhead calculation).
|
|
|
89
|
|
|
90 double stw_duration_sec = end_sec - start_sec;
|
|
|
91 guarantee( stw_duration_sec > 0.0, "invariant" );
|
|
|
92
|
|
|
93 if (outOfDate(start_sec))
|
|
|
94 _conc_overhead = 0.0;
|
|
|
95 else
|
|
|
96 _time_stamp_sec = end_sec;
|
|
|
97 _period_start_time_sec += stw_duration_sec;
|
|
|
98 _conc_overhead_seq = NumberSeq();
|
|
|
99
|
|
|
100 guarantee( os::elapsedTime() > _period_start_time_sec, "invariant" );
|
|
|
101 }
|
|
|
102
|
|
|
103 double
|
|
|
104 COTracker::predConcOverhead() {
|
|
|
105 if (_enabled) {
|
|
|
106 // tty->print(" %1.2lf", _conc_overhead_seq.maximum());
|
|
|
107 return _conc_overhead_seq.maximum();
|
|
|
108 } else {
|
|
|
109 // tty->print(" DD");
|
|
|
110 return 0.0;
|
|
|
111 }
|
|
|
112 }
|
|
|
113
|
|
|
114 void
|
|
|
115 COTracker::resetPred() {
|
|
|
116 _conc_overhead_seq = NumberSeq();
|
|
|
117 }
|
|
|
118
|
|
|
119 COTracker::COTracker(int group)
|
|
|
120 : _enabled(false),
|
|
|
121 _group(group),
|
|
|
122 _period_start_time_sec(-1.0),
|
|
|
123 _period_start_vtime_sec(-1.0),
|
|
|
124 _conc_overhead(-1.0),
|
|
|
125 _time_stamp_sec(-1.0),
|
|
|
126 _next(NULL) {
|
|
|
127 // GCOverheadReportingPeriodMS indicates how frequently the
|
|
|
128 // concurrent overhead will be recorded by the GC Overhead
|
|
|
129 // Reporter. We want to take readings less often than that. If we
|
|
|
130 // took readings more often than some of them might be lost.
|
|
|
131 _update_period_sec = ((double) GCOverheadReportingPeriodMS) / 1000.0 * 1.25;
|
|
|
132 _next = _head;
|
|
|
133 _head = this;
|
|
|
134
|
|
|
135 if (_cpu_number < 0.0)
|
|
|
136 _cpu_number = (double) os::processor_count();
|
|
|
137 }
|
|
|
138
|
|
|
139 // statics
|
|
|
140
|
|
|
141 void
|
|
|
142 COTracker::updateAllForSTW(double start_sec, double end_sec) {
|
|
|
143 for (COTracker* curr = _head; curr != NULL; curr = curr->_next) {
|
|
|
144 curr->updateForSTW(start_sec, end_sec);
|
|
|
145 }
|
|
|
146 }
|
|
|
147
|
|
|
148 double
|
|
|
149 COTracker::totalConcOverhead(double now_sec) {
|
|
|
150 double total_conc_overhead = 0.0;
|
|
|
151
|
|
|
152 for (COTracker* curr = _head; curr != NULL; curr = curr->_next) {
|
|
|
153 double conc_overhead = curr->concOverhead(now_sec);
|
|
|
154 total_conc_overhead += conc_overhead;
|
|
|
155 }
|
|
|
156
|
|
|
157 return total_conc_overhead;
|
|
|
158 }
|
|
|
159
|
|
|
160 double
|
|
|
161 COTracker::totalConcOverhead(double now_sec,
|
|
|
162 size_t group_num,
|
|
|
163 double* co_per_group) {
|
|
|
164 double total_conc_overhead = 0.0;
|
|
|
165
|
|
|
166 for (size_t i = 0; i < group_num; ++i)
|
|
|
167 co_per_group[i] = 0.0;
|
|
|
168
|
|
|
169 for (COTracker* curr = _head; curr != NULL; curr = curr->_next) {
|
|
|
170 size_t group = curr->_group;
|
|
|
171 assert( 0 <= group && group < group_num, "invariant" );
|
|
|
172 double conc_overhead = curr->concOverhead(now_sec);
|
|
|
173
|
|
|
174 co_per_group[group] += conc_overhead;
|
|
|
175 total_conc_overhead += conc_overhead;
|
|
|
176 }
|
|
|
177
|
|
|
178 return total_conc_overhead;
|
|
|
179 }
|
|
|
180
|
|
|
181 double
|
|
|
182 COTracker::totalPredConcOverhead() {
|
|
|
183 double total_pred_conc_overhead = 0.0;
|
|
|
184 for (COTracker* curr = _head; curr != NULL; curr = curr->_next) {
|
|
|
185 total_pred_conc_overhead += curr->predConcOverhead();
|
|
|
186 curr->resetPred();
|
|
|
187 }
|
|
|
188 return total_pred_conc_overhead / _cpu_number;
|
|
|
189 }
|
