Mercurial > hg > truffle
comparison src/cpu/x86/vm/rtmLocking.cpp @ 17780:606acabe7b5c
8031320: Use Intel RTM instructions for locks
Summary: Use RTM for inflated locks and stack locks.
Reviewed-by: iveresov, twisti, roland, dcubed
author | kvn |
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date | Thu, 20 Mar 2014 17:49:27 -0700 |
parents | |
children | 52b37289e3be |
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17778:a48e16541e6b | 17780:606acabe7b5c |
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1 /* | |
2 * Copyright (c) 2014, 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 #include "precompiled.hpp" | |
26 #include "runtime/task.hpp" | |
27 #include "runtime/rtmLocking.hpp" | |
28 | |
29 // One-shot PeriodicTask subclass for enabling RTM locking | |
30 uintx RTMLockingCounters::_calculation_flag = 0; | |
31 | |
32 class RTMLockingCalculationTask : public PeriodicTask { | |
33 public: | |
34 RTMLockingCalculationTask(size_t interval_time) : PeriodicTask(interval_time){ } | |
35 | |
36 virtual void task() { | |
37 RTMLockingCounters::_calculation_flag = 1; | |
38 // Reclaim our storage and disenroll ourself | |
39 delete this; | |
40 } | |
41 }; | |
42 | |
43 void RTMLockingCounters::init() { | |
44 if (UseRTMLocking && RTMLockingCalculationDelay > 0) { | |
45 RTMLockingCalculationTask* task = new RTMLockingCalculationTask(RTMLockingCalculationDelay); | |
46 task->enroll(); | |
47 } else { | |
48 _calculation_flag = 1; | |
49 } | |
50 } | |
51 | |
52 //------------------------------print_on------------------------------- | |
53 void RTMLockingCounters::print_on(outputStream* st) { | |
54 tty->print_cr("# rtm locks total (estimated): " UINTX_FORMAT, _total_count * RTMTotalCountIncrRate); | |
55 tty->print_cr("# rtm lock aborts : " UINTX_FORMAT, _abort_count); | |
56 for (int i = 0; i < ABORT_STATUS_LIMIT; i++) { | |
57 tty->print_cr("# rtm lock aborts %d: " UINTX_FORMAT, i, _abortX_count[i]); | |
58 } | |
59 } |