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17780
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1 /*
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2 * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #include "precompiled.hpp"
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26 #include "runtime/task.hpp"
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27 #include "runtime/rtmLocking.hpp"
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28
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29 // One-shot PeriodicTask subclass for enabling RTM locking
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30 uintx RTMLockingCounters::_calculation_flag = 0;
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31
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32 class RTMLockingCalculationTask : public PeriodicTask {
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33 public:
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34 RTMLockingCalculationTask(size_t interval_time) : PeriodicTask(interval_time){ }
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35
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36 virtual void task() {
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37 RTMLockingCounters::_calculation_flag = 1;
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38 // Reclaim our storage and disenroll ourself
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39 delete this;
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40 }
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41 };
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42
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43 void RTMLockingCounters::init() {
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44 if (UseRTMLocking && RTMLockingCalculationDelay > 0) {
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45 RTMLockingCalculationTask* task = new RTMLockingCalculationTask(RTMLockingCalculationDelay);
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46 task->enroll();
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47 } else {
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48 _calculation_flag = 1;
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49 }
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50 }
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51
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52 //------------------------------print_on-------------------------------
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53 void RTMLockingCounters::print_on(outputStream* st) {
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54 tty->print_cr("# rtm locks total (estimated): " UINTX_FORMAT, _total_count * RTMTotalCountIncrRate);
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55 tty->print_cr("# rtm lock aborts : " UINTX_FORMAT, _abort_count);
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56 for (int i = 0; i < ABORT_STATUS_LIMIT; i++) {
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57 tty->print_cr("# rtm lock aborts %d: " UINTX_FORMAT, i, _abortX_count[i]);
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58 }
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59 }
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