1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
2 * vim: set ts=4 sw=4 et tw=99 ft=cpp:
4 * ***** BEGIN LICENSE BLOCK *****
5 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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/
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
17 * The Original Code is Mozilla SpiderMonkey JavaScript 1.9 code, released
20 * The Initial Developer of the Original Code is
21 * the Mozilla Corporation.
25 * Alternatively, the contents of this file may be used under the terms of
26 * either of the GNU General Public License Version 2 or later (the "GPL"),
27 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
28 * in which case the provisions of the GPL or the LGPL are applicable instead
29 * of those above. If you wish to allow use of your version of this file only
30 * under the terms of either the GPL or the LGPL, and not to allow others to
31 * use your version of this file under the terms of the MPL, indicate your
32 * decision by deleting the provisions above and replace them with the notice
33 * and other provisions required by the GPL or the LGPL. If you do not delete
34 * the provisions above, a recipient may use your version of this file under
35 * the terms of any one of the MPL, the GPL or the LGPL.
37 * ***** END LICENSE BLOCK ***** */
41 #include "jsgcstats.h"
44 #include "jsbuiltins.h"
45 #include "jscompartment.h"
48 using namespace js::gc;
50 #define UL(x) ((unsigned long)(x))
51 #define PERCENT(x,y) (100.0 * (double) (x) / (double) (y))
56 #if defined(JS_DUMP_CONSERVATIVE_GC_ROOTS) || defined(JS_GCMETER)
59 ConservativeGCStats::dump(FILE *fp)
62 for (size_t i = 0; i != JS_ARRAY_LENGTH(counter); ++i)
65 #define ULSTAT(x) ((unsigned long)(x))
66 fprintf(fp, "CONSERVATIVE STACK SCANNING:\n");
67 fprintf(fp, " number of stack words: %lu\n", ULSTAT(words));
68 fprintf(fp, " excluded, low bit set: %lu\n", ULSTAT(counter[CGCT_LOWBITSET]));
69 fprintf(fp, " not withing a chunk: %lu\n", ULSTAT(counter[CGCT_NOTCHUNK]));
70 fprintf(fp, " not within arena range: %lu\n", ULSTAT(counter[CGCT_NOTARENA]));
71 fprintf(fp, " points to free arena: %lu\n", ULSTAT(counter[CGCT_FREEARENA]));
72 fprintf(fp, " excluded, wrong tag: %lu\n", ULSTAT(counter[CGCT_WRONGTAG]));
73 fprintf(fp, " excluded, not live: %lu\n", ULSTAT(counter[CGCT_NOTLIVE]));
74 fprintf(fp, " valid GC things: %lu\n", ULSTAT(counter[CGCT_VALID]));
75 fprintf(fp, " valid but not aligned: %lu\n", ULSTAT(counter[CGCT_VALIDWITHOFFSET]));
82 UpdateCompartmentStats(JSCompartment *comp, unsigned thingKind, uint32 nlivearenas,
83 uint32 nkilledArenas, uint32 nthings)
86 JSGCArenaStats *compSt = &comp->compartmentStats[thingKind];
87 JSGCArenaStats *globSt = &comp->rt->globalArenaStats[thingKind];
88 narenas = nlivearenas + nkilledArenas;
89 JS_ASSERT(narenas >= compSt->livearenas);
91 compSt->newarenas = narenas - compSt->livearenas;
92 compSt->narenas = narenas;
93 compSt->livearenas = nlivearenas;
94 if (compSt->maxarenas < narenas)
95 compSt->maxarenas = narenas;
96 compSt->totalarenas += narenas;
98 compSt->nthings = nthings;
99 if (compSt->maxthings < nthings)
100 compSt->maxthings = nthings;
101 compSt->totalthings += nthings;
102 globSt->newarenas += compSt->newarenas;
103 globSt->narenas += narenas;
104 globSt->livearenas += compSt->livearenas;
105 globSt->totalarenas += compSt->totalarenas;
106 globSt->nthings += compSt->nthings;
107 globSt->totalthings += compSt->totalthings;
108 if (globSt->maxarenas < compSt->maxarenas)
109 globSt->maxarenas = compSt->maxarenas;
110 if (globSt->maxthings < compSt->maxthings)
111 globSt->maxthings = compSt->maxthings;
114 static const char *const GC_ARENA_NAMES[] = {
122 #if JS_HAS_XML_SUPPORT
129 JS_STATIC_ASSERT(JS_ARRAY_LENGTH(GC_ARENA_NAMES) == FINALIZE_LIMIT);
131 template <typename T>
133 GetSizeAndThings(size_t &thingSize, size_t &thingsPerArena)
135 thingSize = sizeof(T);
136 thingsPerArena = Arena<T>::ThingsPerArena;
139 #if defined JS_DUMP_CONSERVATIVE_GC_ROOTS
141 GetAlignedThing(void *thing, int thingKind)
143 Cell *cell = (Cell *)thing;
145 case FINALIZE_OBJECT0:
146 return (void *)GetArena<JSObject>(cell)->getAlignedThing(thing);
147 case FINALIZE_OBJECT2:
148 return (void *)GetArena<JSObject_Slots2>(cell)->getAlignedThing(thing);
149 case FINALIZE_OBJECT4:
150 return (void *)GetArena<JSObject_Slots4>(cell)->getAlignedThing(thing);
151 case FINALIZE_OBJECT8:
152 return (void *)GetArena<JSObject_Slots8>(cell)->getAlignedThing(thing);
153 case FINALIZE_OBJECT12:
154 return (void *)GetArena<JSObject_Slots12>(cell)->getAlignedThing(thing);
155 case FINALIZE_OBJECT16:
156 return (void *)GetArena<JSObject_Slots16>(cell)->getAlignedThing(thing);
157 case FINALIZE_STRING:
158 return (void *)GetArena<JSString>(cell)->getAlignedThing(thing);
159 case FINALIZE_EXTERNAL_STRING:
160 return (void *)GetArena<JSExternalString>(cell)->getAlignedThing(thing);
161 case FINALIZE_SHORT_STRING:
162 return (void *)GetArena<JSShortString>(cell)->getAlignedThing(thing);
163 case FINALIZE_FUNCTION:
164 return (void *)GetArena<JSFunction>(cell)->getAlignedThing(thing);
165 #if JS_HAS_XML_SUPPORT
167 return (void *)GetArena<JSXML>(cell)->getAlignedThing(thing);
176 void GetSizeAndThingsPerArena(int thingKind, size_t &thingSize, size_t &thingsPerArena)
179 case FINALIZE_OBJECT0:
180 GetSizeAndThings<JSObject>(thingSize, thingsPerArena);
182 case FINALIZE_OBJECT2:
183 GetSizeAndThings<JSObject_Slots2>(thingSize, thingsPerArena);
185 case FINALIZE_OBJECT4:
186 GetSizeAndThings<JSObject_Slots4>(thingSize, thingsPerArena);
188 case FINALIZE_OBJECT8:
189 GetSizeAndThings<JSObject_Slots8>(thingSize, thingsPerArena);
191 case FINALIZE_OBJECT12:
192 GetSizeAndThings<JSObject_Slots12>(thingSize, thingsPerArena);
194 case FINALIZE_OBJECT16:
195 GetSizeAndThings<JSObject_Slots16>(thingSize, thingsPerArena);
197 case FINALIZE_EXTERNAL_STRING:
198 case FINALIZE_STRING:
199 GetSizeAndThings<JSString>(thingSize, thingsPerArena);
201 case FINALIZE_SHORT_STRING:
202 GetSizeAndThings<JSShortString>(thingSize, thingsPerArena);
204 case FINALIZE_FUNCTION:
205 GetSizeAndThings<JSFunction>(thingSize, thingsPerArena);
207 #if JS_HAS_XML_SUPPORT
209 GetSizeAndThings<JSXML>(thingSize, thingsPerArena);
218 DumpArenaStats(JSGCArenaStats *stp, FILE *fp)
220 size_t sumArenas = 0, sumTotalArenas = 0, sumThings =0, sumMaxThings = 0;
221 size_t sumThingSize = 0, sumTotalThingSize = 0, sumArenaCapacity = 0;
222 size_t sumTotalArenaCapacity = 0, sumAlloc = 0, sumLocalAlloc = 0;
224 for (int i = 0; i < (int) FINALIZE_LIMIT; i++) {
225 JSGCArenaStats *st = &stp[i];
226 if (st->maxarenas == 0)
228 size_t thingSize = 0, thingsPerArena = 0;
229 GetSizeAndThingsPerArena(i, thingSize, thingsPerArena);
231 fprintf(fp, "%s arenas (thing size %lu, %lu things per arena):\n",
232 GC_ARENA_NAMES[i], UL(thingSize), UL(thingsPerArena));
233 fprintf(fp, " arenas before GC: %lu\n", UL(st->narenas));
234 fprintf(fp, " arenas after GC: %lu (%.1f%%)\n",
235 UL(st->livearenas), PERCENT(st->livearenas, st->narenas));
236 fprintf(fp, " max arenas: %lu\n", UL(st->maxarenas));
237 fprintf(fp, " things: %lu\n", UL(st->nthings));
238 fprintf(fp, " GC cell utilization: %.1f%%\n",
239 PERCENT(st->nthings, thingsPerArena * st->narenas));
240 fprintf(fp, " average cell utilization: %.1f%%\n",
241 PERCENT(st->totalthings, thingsPerArena * st->totalarenas));
242 fprintf(fp, " max things: %lu\n", UL(st->maxthings));
243 fprintf(fp, " alloc attempts: %lu\n", UL(st->alloc));
244 fprintf(fp, " alloc without locks: %lu (%.1f%%)\n",
245 UL(st->localalloc), PERCENT(st->localalloc, st->alloc));
246 sumArenas += st->narenas;
247 sumTotalArenas += st->totalarenas;
248 sumThings += st->nthings;
249 sumMaxThings += st->maxthings;
250 sumThingSize += thingSize * st->nthings;
251 sumTotalThingSize += size_t(thingSize * st->totalthings);
252 sumArenaCapacity += thingSize * thingsPerArena * st->narenas;
253 sumTotalArenaCapacity += thingSize * thingsPerArena * st->totalarenas;
254 sumAlloc += st->alloc;
255 sumLocalAlloc += st->localalloc;
259 fputs("Never used arenas:\n", fp);
260 for (int i = 0; i < (int) FINALIZE_LIMIT; i++) {
261 JSGCArenaStats *st = &stp[i];
262 if (st->maxarenas != 0)
264 fprintf(fp, "%s\n", GC_ARENA_NAMES[i]);
266 fprintf(fp, "\nTOTAL STATS:\n");
267 fprintf(fp, " total GC arenas: %lu\n", UL(sumArenas));
268 fprintf(fp, " total GC things: %lu\n", UL(sumThings));
269 fprintf(fp, " max total GC things: %lu\n", UL(sumMaxThings));
270 fprintf(fp, " GC cell utilization: %.1f%%\n",
271 PERCENT(sumThingSize, sumArenaCapacity));
272 fprintf(fp, " average cell utilization: %.1f%%\n",
273 PERCENT(sumTotalThingSize, sumTotalArenaCapacity));
274 fprintf(fp, " alloc attempts: %lu\n", UL(sumAlloc));
275 fprintf(fp, " alloc without locks: %lu (%.1f%%)\n",
276 UL(sumLocalAlloc), PERCENT(sumLocalAlloc, sumAlloc));
280 DumpCompartmentStats(JSCompartment *comp, FILE *fp)
282 if (comp->rt->atomsCompartment == comp)
283 fprintf(fp, "\n**** AtomsCompartment Allocation Statistics: %p ****\n\n", (void *) comp);
285 fprintf(fp, "\n**** Compartment Allocation Statistics: %p ****\n\n", (void *) comp);
287 DumpArenaStats(&comp->compartmentStats[0], fp);
298 js_DumpGCStats(JSRuntime *rt, FILE *fp)
300 #define ULSTAT(x) UL(rt->gcStats.x)
301 if (JS_WANT_GC_METER_PRINT) {
302 fprintf(fp, "\n**** Global Arena Allocation Statistics: ****\n");
303 DumpArenaStats(&rt->globalArenaStats[0], fp);
304 fprintf(fp, " bytes allocated: %lu\n", UL(rt->gcBytes));
305 fprintf(fp, " allocation failures: %lu\n", ULSTAT(fail));
306 fprintf(fp, " last ditch GC runs: %lu\n", ULSTAT(lastditch));
307 fprintf(fp, " valid lock calls: %lu\n", ULSTAT(lock));
308 fprintf(fp, " valid unlock calls: %lu\n", ULSTAT(unlock));
309 fprintf(fp, " delayed tracing calls: %lu\n", ULSTAT(unmarked));
311 fprintf(fp, " max trace later count: %lu\n", ULSTAT(maxunmarked));
313 fprintf(fp, "potentially useful GC calls: %lu\n", ULSTAT(poke));
314 fprintf(fp, " thing arenas freed so far: %lu\n\n", ULSTAT(afree));
317 if (JS_WANT_GC_PER_COMPARTMENT_PRINT)
318 for (JSCompartment **c = rt->compartments.begin(); c != rt->compartments.end(); ++c)
319 DumpCompartmentStats(*c, fp);
320 PodZero(&rt->globalArenaStats);
321 if (JS_WANT_CONSERVATIVE_GC_PRINT)
322 rt->gcStats.conservative.dump(fp);
329 #ifdef JS_DUMP_CONSERVATIVE_GC_ROOTS
331 GCMarker::dumpConservativeRoots()
333 if (!conservativeDumpFileName)
337 if (!strcmp(conservativeDumpFileName, "stdout")) {
339 } else if (!strcmp(conservativeDumpFileName, "stderr")) {
341 } else if (!(fp = fopen(conservativeDumpFileName, "aw"))) {
343 "Warning: cannot open %s to dump the conservative roots\n",
344 conservativeDumpFileName);
348 conservativeStats.dump(fp);
350 for (ConservativeRoot *i = conservativeRoots.begin();
351 i != conservativeRoots.end();
353 fprintf(fp, " %p: ", i->thing);
354 switch (GetFinalizableTraceKind(i->thingKind)) {
356 JS_NOT_REACHED("Unknown trace kind");
358 case JSTRACE_OBJECT: {
359 JSObject *obj = (JSObject *) i->thing;
360 fprintf(fp, "object %s", obj->getClass()->name);
363 case JSTRACE_STRING: {
364 JSString *str = (JSString *) i->thing;
365 if (str->isLinear()) {
367 PutEscapedString(buf, sizeof buf, str->assertIsLinear(), '"');
368 fprintf(fp, "string %s", buf);
370 fprintf(fp, "rope: length %d", (int)str->length());
374 # if JS_HAS_XML_SUPPORT
376 JSXML *xml = (JSXML *) i->thing;
377 fprintf(fp, "xml %u", (unsigned)xml->xml_class);
386 if (fp != stdout && fp != stderr)
389 #endif /* JS_DUMP_CONSERVATIVE_GC_ROOTS */
393 jsrefcount newChunkCount = 0;
394 jsrefcount destroyChunkCount = 0;
398 memset(this, 0, sizeof(GCTimer));
403 GCTimer::getFirstEnter() {
404 static uint64 firstEnter = rdtsc();
409 GCTimer::finish(bool lastGC) {
413 if (JS_WANT_GC_SUITE_PRINT) {
414 fprintf(stderr, "%f %f %f\n",
415 (double)(end - enter) / 1e6,
416 (double)(startSweep - startMark) / 1e6,
417 (double)(sweepDestroyEnd - startSweep) / 1e6);
422 gcFile = fopen("gcTimer.dat", "a");
424 fprintf(gcFile, " AppTime, Total, Mark, Sweep, FinObj,");
425 fprintf(gcFile, " FinStr, SwShapes, Destroy, +Chunks, -Chunks\n");
428 fprintf(gcFile, "%12.1f, %6.1f, %6.1f, %6.1f, %6.1f, %6.1f, %8.1f, %6.1f, ",
429 (double)(enter - getFirstEnter()) / 1e6,
430 (double)(end - enter) / 1e6,
431 (double)(startSweep - startMark) / 1e6,
432 (double)(sweepDestroyEnd - startSweep) / 1e6,
433 (double)(sweepObjectEnd - startSweep) / 1e6,
434 (double)(sweepStringEnd - sweepObjectEnd) / 1e6,
435 (double)(sweepShapeEnd - sweepStringEnd) / 1e6,
436 (double)(sweepDestroyEnd - sweepShapeEnd) / 1e6);
437 fprintf(gcFile, "%7d, %7d \n", newChunkCount,
448 destroyChunkCount = 0;