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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_GC_BEGIN,
56 : PHASE_WAIT_BACKGROUND_THREAD,
57 : PHASE_PURGE,
58 : PHASE_MARK,
59 : PHASE_MARK_ROOTS,
60 : PHASE_MARK_DELAYED,
61 : PHASE_MARK_OTHER,
62 : PHASE_FINALIZE_START,
63 : PHASE_SWEEP,
64 : PHASE_SWEEP_COMPARTMENTS,
65 : PHASE_SWEEP_OBJECT,
66 : PHASE_SWEEP_STRING,
67 : PHASE_SWEEP_SCRIPT,
68 : PHASE_SWEEP_SHAPE,
69 : PHASE_DISCARD_CODE,
70 : PHASE_DISCARD_ANALYSIS,
71 : PHASE_DISCARD_TI,
72 : PHASE_SWEEP_TYPES,
73 : PHASE_CLEAR_SCRIPT_ANALYSIS,
74 : PHASE_FINALIZE_END,
75 : PHASE_DESTROY,
76 : PHASE_GC_END,
77 :
78 : PHASE_LIMIT
79 : };
80 :
81 : enum Stat {
82 : STAT_NEW_CHUNK,
83 : STAT_DESTROY_CHUNK,
84 :
85 : STAT_LIMIT
86 : };
87 :
88 : class StatisticsSerializer;
89 :
90 : struct Statistics {
91 : Statistics(JSRuntime *rt);
92 : ~Statistics();
93 :
94 : void beginPhase(Phase phase);
95 : void endPhase(Phase phase);
96 :
97 : void beginSlice(int collectedCount, int compartmentCount, gcreason::Reason reason);
98 : void endSlice();
99 :
100 27 : void reset(const char *reason) { slices.back().resetReason = reason; }
101 38240 : void nonincremental(const char *reason) { nonincrementalReason = reason; }
102 :
103 80982 : void count(Stat s) {
104 80982 : JS_ASSERT(s < STAT_LIMIT);
105 80982 : counts[s]++;
106 80982 : }
107 :
108 : jschar *formatMessage();
109 : jschar *formatJSON(uint64_t timestamp);
110 :
111 : private:
112 : JSRuntime *runtime;
113 :
114 : int64_t startupTime;
115 :
116 : FILE *fp;
117 : bool fullFormat;
118 :
119 : int collectedCount;
120 : int compartmentCount;
121 : const char *nonincrementalReason;
122 :
123 38481 : struct SliceData {
124 38481 : SliceData(gcreason::Reason reason, int64_t start)
125 38481 : : reason(reason), resetReason(NULL), start(start)
126 : {
127 38481 : PodArrayZero(phaseTimes);
128 38481 : }
129 :
130 : gcreason::Reason reason;
131 : const char *resetReason;
132 : int64_t start, end;
133 : int64_t phaseTimes[PHASE_LIMIT];
134 :
135 0 : int64_t duration() const { return end - start; }
136 : };
137 :
138 : Vector<SliceData, 8, SystemAllocPolicy> slices;
139 :
140 : /* Most recent time when the given phase started. */
141 : int64_t phaseStarts[PHASE_LIMIT];
142 :
143 : /* Total time in a given phase for this GC. */
144 : int64_t phaseTimes[PHASE_LIMIT];
145 :
146 : /* Total time in a given phase over all GCs. */
147 : int64_t phaseTotals[PHASE_LIMIT];
148 :
149 : /* Number of events of this type for this GC. */
150 : unsigned int counts[STAT_LIMIT];
151 :
152 : /* Allocated space before the GC started. */
153 : size_t preBytes;
154 :
155 : void beginGC();
156 : void endGC();
157 :
158 : int64_t gcDuration();
159 : void printStats();
160 : bool formatData(StatisticsSerializer &ss, uint64_t timestamp);
161 :
162 : double computeMMU(int64_t resolution);
163 : };
164 :
165 : struct AutoGCSlice {
166 38481 : AutoGCSlice(Statistics &stats, int collectedCount, int compartmentCount, gcreason::Reason reason
167 : JS_GUARD_OBJECT_NOTIFIER_PARAM)
168 38481 : : stats(stats)
169 : {
170 38481 : JS_GUARD_OBJECT_NOTIFIER_INIT;
171 38481 : stats.beginSlice(collectedCount, compartmentCount, reason);
172 38481 : }
173 38481 : ~AutoGCSlice() { stats.endSlice(); }
174 :
175 : Statistics &stats;
176 : JS_DECL_USE_GUARD_OBJECT_NOTIFIER
177 : };
178 :
179 : struct AutoPhase {
180 1051317 : AutoPhase(Statistics &stats, Phase phase JS_GUARD_OBJECT_NOTIFIER_PARAM)
181 1051317 : : stats(stats), phase(phase) { JS_GUARD_OBJECT_NOTIFIER_INIT; stats.beginPhase(phase); }
182 1051317 : ~AutoPhase() { stats.endPhase(phase); }
183 :
184 : Statistics &stats;
185 : Phase phase;
186 : JS_DECL_USE_GUARD_OBJECT_NOTIFIER
187 : };
188 :
189 : } /* namespace gcstats */
190 : } /* namespace js */
191 :
192 : #endif /* jsgc_statistics_h___ */
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