Mercurial > hg > truffle

annotate src/share/vm/utilities/ticks.cpp @ 17709:f9e35a9dc8c7

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
8033792: AltHashing used jint for imprecise bit shifting Summary: AltHashing used jint the way of juint in bit shifting which could lead loss of precision. Fix by change _seed defined as juint. Reviewed-by: coleenp, ccheung Contributed-by: yumin.qi@oracle.com
author minqi
date Mon, 10 Feb 2014 21:29:14 -0800
parents 86e6d691f2e1
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
13400
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
1 /*
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
2 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
4 *
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
5 * This code is free software; you can redistribute it and/or modify it
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
6 * under the terms of the GNU General Public License version 2 only, as
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
7 * published by the Free Software Foundation.
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
8 *
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
9 * This code is distributed in the hope that it will be useful, but WITHOUT
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
12 * version 2 for more details (a copy is included in the LICENSE file that
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
13 * accompanied this code).
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
14 *
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
15 * You should have received a copy of the GNU General Public License version
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
16 * 2 along with this work; if not, write to the Free Software Foundation,
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
18 *
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
20 * or visit www.oracle.com if you need additional information or have any
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
21 * questions.
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
22 *
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
23 */
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
24
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
25 #include "precompiled.hpp"
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
26 #include "runtime/os.hpp"
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
27 #include "utilities/ticks.inline.hpp"
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
28
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
29 #ifdef ASSERT
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
30 const jlong Ticks::invalid_time_stamp = -2; // 0xFFFF FFFF`FFFF FFFE
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
31 #endif
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
32
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
33 void Ticks::stamp() {
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
34 _stamp_ticks = os::elapsed_counter();
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
35 }
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
36
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
37 const Ticks Ticks::now() {
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
38 Ticks t;
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
39 t.stamp();
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
40 return t;
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
41 }
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
42
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
43 Tickspan::Tickspan(const Ticks& end, const Ticks& start) {
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
44 assert(end.value() != Ticks::invalid_time_stamp, "end is unstamped!");
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
45 assert(start.value() != Ticks::invalid_time_stamp, "start is unstamped!");
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
46
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
47 assert(end >= start, "negative time!");
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
48
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
49 _span_ticks = end.value() - start.value();
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
50 }
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
51
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
52 template <typename ReturnType>
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
53 static ReturnType time_conversion(const Tickspan& span, TicksToTimeHelper::Unit unit) {
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
54 assert(TicksToTimeHelper::SECONDS == unit ||
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
55 TicksToTimeHelper::MILLISECONDS == unit, "invalid unit!");
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
56
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
57 ReturnType frequency_per_unit = (ReturnType)os::elapsed_frequency() / (ReturnType)unit;
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
58
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
59 return (ReturnType) ((ReturnType)span.value() / frequency_per_unit);
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
60 }
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
61
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
62 double TicksToTimeHelper::seconds(const Tickspan& span) {
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
63 return time_conversion<double>(span, SECONDS);
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
64 }
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
65
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
66 jlong TicksToTimeHelper::milliseconds(const Tickspan& span) {
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
67 return time_conversion<jlong>(span, MILLISECONDS);
86e6d691f2e1 8028128: Add a type safe alternative for working with counter based data
mgronlun
parents:
diff changeset
68 }