LCOV - app.info - js/src/gc/Statistics.h

LCOV - code coverage report
| Current view: | directory - js/src/gc - Statistics.h (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 18 | 17 | 94.4 %
| Date: | 2012-07-07 | Functions: | 10 | 9 | 90.0 %

           1                 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
           2                 :  * vim: set ts=8 sw=4 et tw=78:
           3                 :  *
           4                 :  * ***** BEGIN LICENSE BLOCK *****
           5                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           6                 :  *
           7                 :  * The contents of this file are subject to the Mozilla Public License Version
           8                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           9                 :  * the License. You may obtain a copy of the License at
          10                 :  * http://www.mozilla.org/MPL/
          11                 :  *
          12                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          13                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          14                 :  * for the specific language governing rights and limitations under the
          15                 :  * License.
          16                 :  *
          17                 :  * The Original Code is SpiderMonkey JavaScript engine.
          18                 :  *
          19                 :  * The Initial Developer of the Original Code is
          20                 :  * the Mozilla Foundation.
          21                 :  * Portions created by the Initial Developer are Copyright (C) 2011
          22                 :  * the Initial Developer. All Rights Reserved.
          23                 :  *
          24                 :  * Contributor(s):
          25                 :  *
          26                 :  * Alternatively, the contents of this file may be used under the terms of
          27                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
          28                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          29                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          30                 :  * of those above. If you wish to allow use of your version of this file only
          31                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          32                 :  * use your version of this file under the terms of the MPL, indicate your
          33                 :  * decision by deleting the provisions above and replace them with the notice
          34                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          35                 :  * the provisions above, a recipient may use your version of this file under
          36                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          37                 :  *
          38                 :  * ***** END LICENSE BLOCK ***** */
          39                 :
          40                 : #ifndef jsgc_statistics_h___
          41                 : #define jsgc_statistics_h___
          42                 :
          43                 : #include <string.h>
          44                 :
          45                 : #include "jsfriendapi.h"
          46                 : #include "jspubtd.h"
          47                 : #include "jsutil.h"
          48                 :
          49                 : struct JSCompartment;
          50                 :
          51                 : namespace js {
          52                 : namespace gcstats {
          53                 :
          54                 : enum Phase {
          55                 :     PHASE_MARK,
          56                 :     PHASE_MARK_ROOTS,
          57                 :     PHASE_MARK_DELAYED,
          58                 :     PHASE_MARK_OTHER,
          59                 :     PHASE_SWEEP,
          60                 :     PHASE_SWEEP_OBJECT,
          61                 :     PHASE_SWEEP_STRING,
          62                 :     PHASE_SWEEP_SCRIPT,
          63                 :     PHASE_SWEEP_SHAPE,
          64                 :     PHASE_DISCARD_CODE,
          65                 :     PHASE_DISCARD_ANALYSIS,
          66                 :     PHASE_XPCONNECT,
          67                 :     PHASE_DESTROY,
          68                 :
          69                 :     PHASE_LIMIT
          70                 : };
          71                 :
          72                 : enum Stat {
          73                 :     STAT_NEW_CHUNK,
          74                 :     STAT_DESTROY_CHUNK,
          75                 :
          76                 :     STAT_LIMIT
          77                 : };
          78                 :
          79                 : static const size_t BUFFER_SIZE = 8192;
          80                 :
          81                 : struct Statistics {
          82                 :     Statistics(JSRuntime *rt);
          83                 :     ~Statistics();
          84                 :
          85                 :     void beginPhase(Phase phase);
          86                 :     void endPhase(Phase phase);
          87                 :
          88                 :     void beginSlice(JSCompartment *comp, gcreason::Reason reason);
          89                 :     void endSlice();
          90                 :
          91               0 :     void reset(const char *reason) { slices.back().resetReason = reason; }
          92           51100 :     void nonincremental(const char *reason) { nonincrementalReason = reason; }
          93                 :
          94           87238 :     void count(Stat s) {
          95           87238 :         JS_ASSERT(s < STAT_LIMIT);
          96           87238 :         counts[s]++;
          97           87238 :     }
          98                 :
          99                 :   private:
         100                 :     JSRuntime *runtime;
         101                 :
         102                 :     int64_t startupTime;
         103                 :
         104                 :     FILE *fp;
         105                 :     bool fullFormat;
         106                 :
         107                 :     JSCompartment *compartment;
         108                 :     const char *nonincrementalReason;
         109                 :
         110           51099 :     struct SliceData {
         111           51100 :         SliceData(gcreason::Reason reason, int64_t start)
         112           51100 :           : reason(reason), resetReason(NULL), start(start)
         113                 :         {
         114           51100 :             PodArrayZero(phaseTimes);
         115           51100 :         }
         116                 :
         117                 :         gcreason::Reason reason;
         118                 :         const char *resetReason;
         119                 :         int64_t start, end;
         120                 :         int64_t phaseTimes[PHASE_LIMIT];
         121                 :
         122           13332 :         int64_t duration() const { return end - start; }
         123                 :     };
         124                 :
         125                 :     Vector<SliceData, 8, SystemAllocPolicy> slices;
         126                 :
         127                 :     /* Most recent time when the given phase started. */
         128                 :     int64_t phaseStarts[PHASE_LIMIT];
         129                 :
         130                 :     /* Total time in a given phase for this GC. */
         131                 :     int64_t phaseTimes[PHASE_LIMIT];
         132                 :
         133                 :     /* Total time in a given phase over all GCs. */
         134                 :     int64_t phaseTotals[PHASE_LIMIT];
         135                 :
         136                 :     /* Number of events of this type for this GC. */
         137                 :     unsigned int counts[STAT_LIMIT];
         138                 :
         139                 :     char buffer[BUFFER_SIZE];
         140                 :     bool needComma;
         141                 :
         142                 :     void beginGC();
         143                 :     void endGC();
         144                 :
         145                 :     int64_t gcDuration();
         146                 :     double t(int64_t t);
         147                 :     void printStats();
         148                 :     void fmt(const char *f, ...);
         149                 :     void fmtIfNonzero(const char *name, double t);
         150                 :     void formatPhases(int64_t *times);
         151                 :     const char *formatData();
         152                 :
         153                 :     double computeMMU(int64_t resolution);
         154                 : };
         155                 :
         156                 : struct AutoGCSlice {
         157           51100 :     AutoGCSlice(Statistics &stats, JSCompartment *comp, gcreason::Reason reason
         158                 :                 JS_GUARD_OBJECT_NOTIFIER_PARAM)
         159           51100 :       : stats(stats) { JS_GUARD_OBJECT_NOTIFIER_INIT; stats.beginSlice(comp, reason); }
         160           51100 :     ~AutoGCSlice() { stats.endSlice(); }
         161                 :
         162                 :     Statistics &stats;
         163                 :     JS_DECL_USE_GUARD_OBJECT_NOTIFIER
         164                 : };
         165                 :
         166                 : struct AutoPhase {
         167          858146 :     AutoPhase(Statistics &stats, Phase phase JS_GUARD_OBJECT_NOTIFIER_PARAM)
         168          858146 :       : stats(stats), phase(phase) { JS_GUARD_OBJECT_NOTIFIER_INIT; stats.beginPhase(phase); }
         169          858146 :     ~AutoPhase() { stats.endPhase(phase); }
         170                 :
         171                 :     Statistics &stats;
         172                 :     Phase phase;
         173                 :     JS_DECL_USE_GUARD_OBJECT_NOTIFIER
         174                 : };
         175                 :
         176                 : } /* namespace gcstats */
         177                 : } /* namespace js */
         178                 :
         179                 : #endif /* jsgc_statistics_h___ */

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