Commit | Line | Data |
---|---|---|
02bcaa8c | 1 | /* |
f5cc024a | 2 | * Clock functions |
02bcaa8c | 3 | */ |
f5cc024a | 4 | |
02bcaa8c | 5 | #include <unistd.h> |
c223da83 | 6 | #include <math.h> |
02bcaa8c | 7 | #include <sys/time.h> |
03e20d68 | 8 | #include <time.h> |
02bcaa8c JA |
9 | |
10 | #include "fio.h" | |
be4ecfdf | 11 | #include "smalloc.h" |
02bcaa8c JA |
12 | |
13 | #include "hash.h" | |
7d11f871 | 14 | #include "os/os.h" |
02bcaa8c | 15 | |
919e789d | 16 | #if defined(ARCH_HAVE_CPU_CLOCK) && !defined(ARCH_CPU_CLOCK_CYCLES_PER_USEC) |
c223da83 | 17 | static unsigned long cycles_per_usec; |
71339117 | 18 | static unsigned long inv_cycles_per_usec; |
09a32402 | 19 | #endif |
4de98eb0 | 20 | int tsc_reliable = 0; |
5d879392 JA |
21 | |
22 | struct tv_valid { | |
ba458c2f | 23 | uint64_t last_cycles; |
02dcf81c JA |
24 | int last_tv_valid; |
25 | int warned; | |
5d879392 | 26 | }; |
67bf9823 | 27 | #ifdef CONFIG_TLS_THREAD |
b4ea84da | 28 | static __thread struct tv_valid static_tv_valid; |
67bf9823 | 29 | #else |
5d879392 | 30 | static pthread_key_t tv_tls_key; |
67bf9823 | 31 | #endif |
02bcaa8c | 32 | |
16de1bf9 | 33 | enum fio_cs fio_clock_source = FIO_PREFERRED_CLOCK_SOURCE; |
fa80feae | 34 | int fio_clock_source_set = 0; |
10aa136b | 35 | static enum fio_cs fio_clock_source_inited = CS_INVAL; |
c223da83 | 36 | |
02bcaa8c JA |
37 | #ifdef FIO_DEBUG_TIME |
38 | ||
39 | #define HASH_BITS 8 | |
40 | #define HASH_SIZE (1 << HASH_BITS) | |
41 | ||
01743ee1 | 42 | static struct flist_head hash[HASH_SIZE]; |
02bcaa8c JA |
43 | static int gtod_inited; |
44 | ||
45 | struct gtod_log { | |
01743ee1 | 46 | struct flist_head list; |
02bcaa8c JA |
47 | void *caller; |
48 | unsigned long calls; | |
49 | }; | |
50 | ||
51 | static struct gtod_log *find_hash(void *caller) | |
52 | { | |
53 | unsigned long h = hash_ptr(caller, HASH_BITS); | |
01743ee1 | 54 | struct flist_head *entry; |
02bcaa8c | 55 | |
01743ee1 JA |
56 | flist_for_each(entry, &hash[h]) { |
57 | struct gtod_log *log = flist_entry(entry, struct gtod_log, | |
58 | list); | |
02bcaa8c JA |
59 | |
60 | if (log->caller == caller) | |
61 | return log; | |
62 | } | |
63 | ||
64 | return NULL; | |
65 | } | |
66 | ||
67 | static struct gtod_log *find_log(void *caller) | |
68 | { | |
69 | struct gtod_log *log = find_hash(caller); | |
70 | ||
71 | if (!log) { | |
72 | unsigned long h; | |
73 | ||
74 | log = malloc(sizeof(*log)); | |
01743ee1 | 75 | INIT_FLIST_HEAD(&log->list); |
02bcaa8c JA |
76 | log->caller = caller; |
77 | log->calls = 0; | |
78 | ||
79 | h = hash_ptr(caller, HASH_BITS); | |
01743ee1 | 80 | flist_add_tail(&log->list, &hash[h]); |
02bcaa8c JA |
81 | } |
82 | ||
83 | return log; | |
84 | } | |
85 | ||
86 | static void gtod_log_caller(void *caller) | |
87 | { | |
88 | if (gtod_inited) { | |
89 | struct gtod_log *log = find_log(caller); | |
90 | ||
91 | log->calls++; | |
92 | } | |
93 | } | |
94 | ||
95 | static void fio_exit fio_dump_gtod(void) | |
96 | { | |
97 | unsigned long total_calls = 0; | |
98 | int i; | |
99 | ||
100 | for (i = 0; i < HASH_SIZE; i++) { | |
01743ee1 | 101 | struct flist_head *entry; |
02bcaa8c JA |
102 | struct gtod_log *log; |
103 | ||
01743ee1 JA |
104 | flist_for_each(entry, &hash[i]) { |
105 | log = flist_entry(entry, struct gtod_log, list); | |
02bcaa8c | 106 | |
5ec10eaa JA |
107 | printf("function %p, calls %lu\n", log->caller, |
108 | log->calls); | |
02bcaa8c JA |
109 | total_calls += log->calls; |
110 | } | |
111 | } | |
112 | ||
113 | printf("Total %lu gettimeofday\n", total_calls); | |
114 | } | |
115 | ||
116 | static void fio_init gtod_init(void) | |
117 | { | |
118 | int i; | |
119 | ||
120 | for (i = 0; i < HASH_SIZE; i++) | |
01743ee1 | 121 | INIT_FLIST_HEAD(&hash[i]); |
02bcaa8c JA |
122 | |
123 | gtod_inited = 1; | |
124 | } | |
125 | ||
126 | #endif /* FIO_DEBUG_TIME */ | |
127 | ||
67bf9823 | 128 | #ifdef CONFIG_CLOCK_GETTIME |
9ff1c070 JA |
129 | static int fill_clock_gettime(struct timespec *ts) |
130 | { | |
67bf9823 | 131 | #ifdef CONFIG_CLOCK_MONOTONIC |
9ff1c070 JA |
132 | return clock_gettime(CLOCK_MONOTONIC, ts); |
133 | #else | |
134 | return clock_gettime(CLOCK_REALTIME, ts); | |
135 | #endif | |
136 | } | |
1e97cce9 | 137 | #endif |
67bf9823 | 138 | |
9eb271b9 | 139 | static void __fio_gettime(struct timeval *tp) |
02bcaa8c | 140 | { |
93f0b09a | 141 | struct tv_valid *tv; |
5d879392 | 142 | |
67bf9823 JA |
143 | #ifdef CONFIG_TLS_THREAD |
144 | tv = &static_tv_valid; | |
145 | #else | |
93f0b09a | 146 | tv = pthread_getspecific(tv_tls_key); |
67bf9823 | 147 | #endif |
93f0b09a | 148 | |
c223da83 | 149 | switch (fio_clock_source) { |
67bf9823 | 150 | #ifdef CONFIG_GETTIMEOFDAY |
c223da83 | 151 | case CS_GTOD: |
02bcaa8c | 152 | gettimeofday(tp, NULL); |
c223da83 | 153 | break; |
67bf9823 JA |
154 | #endif |
155 | #ifdef CONFIG_CLOCK_GETTIME | |
c223da83 | 156 | case CS_CGETTIME: { |
02bcaa8c JA |
157 | struct timespec ts; |
158 | ||
9ff1c070 | 159 | if (fill_clock_gettime(&ts) < 0) { |
c223da83 JA |
160 | log_err("fio: clock_gettime fails\n"); |
161 | assert(0); | |
02bcaa8c JA |
162 | } |
163 | ||
164 | tp->tv_sec = ts.tv_sec; | |
165 | tp->tv_usec = ts.tv_nsec / 1000; | |
c223da83 JA |
166 | break; |
167 | } | |
67bf9823 | 168 | #endif |
c223da83 JA |
169 | #ifdef ARCH_HAVE_CPU_CLOCK |
170 | case CS_CPUCLOCK: { | |
ba458c2f | 171 | uint64_t usecs, t; |
c223da83 JA |
172 | |
173 | t = get_cpu_clock(); | |
02dcf81c JA |
174 | if (t < tv->last_cycles && tv->last_tv_valid && |
175 | !tv->warned) { | |
9eb271b9 | 176 | log_err("fio: CPU clock going back in time\n"); |
02dcf81c JA |
177 | tv->warned = 1; |
178 | } | |
c223da83 | 179 | |
9eb271b9 JA |
180 | tv->last_cycles = t; |
181 | tv->last_tv_valid = 1; | |
919e789d CE |
182 | #ifdef ARCH_CPU_CLOCK_CYCLES_PER_USEC |
183 | usecs = t / ARCH_CPU_CLOCK_CYCLES_PER_USEC; | |
184 | #else | |
71339117 | 185 | usecs = (t * inv_cycles_per_usec) / 16777216UL; |
919e789d | 186 | #endif |
c223da83 JA |
187 | tp->tv_sec = usecs / 1000000; |
188 | tp->tv_usec = usecs % 1000000; | |
c223da83 JA |
189 | break; |
190 | } | |
191 | #endif | |
192 | default: | |
193 | log_err("fio: invalid clock source %d\n", fio_clock_source); | |
194 | break; | |
02bcaa8c | 195 | } |
67bf9823 JA |
196 | } |
197 | ||
198 | #ifdef FIO_DEBUG_TIME | |
199 | void fio_gettime(struct timeval *tp, void *caller) | |
200 | #else | |
201 | void fio_gettime(struct timeval *tp, void fio_unused *caller) | |
202 | #endif | |
203 | { | |
67bf9823 JA |
204 | #ifdef FIO_DEBUG_TIME |
205 | if (!caller) | |
206 | caller = __builtin_return_address(0); | |
207 | ||
208 | gtod_log_caller(caller); | |
209 | #endif | |
27325ed5 | 210 | if (fio_unlikely(fio_gettime_offload(tp))) |
67bf9823 | 211 | return; |
67bf9823 | 212 | |
9eb271b9 | 213 | __fio_gettime(tp); |
02bcaa8c | 214 | } |
be4ecfdf | 215 | |
919e789d | 216 | #if defined(ARCH_HAVE_CPU_CLOCK) && !defined(ARCH_CPU_CLOCK_CYCLES_PER_USEC) |
c223da83 JA |
217 | static unsigned long get_cycles_per_usec(void) |
218 | { | |
219 | struct timeval s, e; | |
ba458c2f | 220 | uint64_t c_s, c_e; |
67bf9823 | 221 | enum fio_cs old_cs = fio_clock_source; |
c223da83 | 222 | |
67bf9823 JA |
223 | #ifdef CONFIG_CLOCK_GETTIME |
224 | fio_clock_source = CS_CGETTIME; | |
225 | #else | |
226 | fio_clock_source = CS_GTOD; | |
227 | #endif | |
228 | __fio_gettime(&s); | |
9ff1c070 | 229 | |
c223da83 JA |
230 | c_s = get_cpu_clock(); |
231 | do { | |
ba458c2f | 232 | uint64_t elapsed; |
c223da83 | 233 | |
67bf9823 | 234 | __fio_gettime(&e); |
9ff1c070 | 235 | |
c223da83 | 236 | elapsed = utime_since(&s, &e); |
486332e5 | 237 | if (elapsed >= 1280) { |
c223da83 JA |
238 | c_e = get_cpu_clock(); |
239 | break; | |
240 | } | |
241 | } while (1); | |
242 | ||
67bf9823 | 243 | fio_clock_source = old_cs; |
c011000d | 244 | return (c_e - c_s + 127) >> 7; |
c223da83 JA |
245 | } |
246 | ||
fa80feae JA |
247 | #define NR_TIME_ITERS 50 |
248 | ||
e259879e | 249 | static int calibrate_cpu_clock(void) |
c223da83 JA |
250 | { |
251 | double delta, mean, S; | |
ba458c2f | 252 | uint64_t avg, cycles[NR_TIME_ITERS]; |
c223da83 JA |
253 | int i, samples; |
254 | ||
c223da83 JA |
255 | cycles[0] = get_cycles_per_usec(); |
256 | S = delta = mean = 0.0; | |
fa80feae | 257 | for (i = 0; i < NR_TIME_ITERS; i++) { |
c223da83 JA |
258 | cycles[i] = get_cycles_per_usec(); |
259 | delta = cycles[i] - mean; | |
260 | if (delta) { | |
261 | mean += delta / (i + 1.0); | |
262 | S += delta * (cycles[i] - mean); | |
263 | } | |
264 | } | |
265 | ||
e259879e JA |
266 | /* |
267 | * The most common platform clock breakage is returning zero | |
268 | * indefinitely. Check for that and return failure. | |
269 | */ | |
270 | if (!cycles[0] && !cycles[NR_TIME_ITERS - 1]) | |
271 | return 1; | |
272 | ||
fa80feae | 273 | S = sqrt(S / (NR_TIME_ITERS - 1.0)); |
c223da83 JA |
274 | |
275 | samples = avg = 0; | |
fa80feae | 276 | for (i = 0; i < NR_TIME_ITERS; i++) { |
c223da83 JA |
277 | double this = cycles[i]; |
278 | ||
03e20d68 | 279 | if ((fmax(this, mean) - fmin(this, mean)) > S) |
c223da83 JA |
280 | continue; |
281 | samples++; | |
282 | avg += this; | |
283 | } | |
284 | ||
fa80feae | 285 | S /= (double) NR_TIME_ITERS; |
89db727d | 286 | mean /= 10.0; |
c223da83 | 287 | |
fa80feae | 288 | for (i = 0; i < NR_TIME_ITERS; i++) |
4b91ee8f JA |
289 | dprint(FD_TIME, "cycles[%d]=%llu\n", i, |
290 | (unsigned long long) cycles[i] / 10); | |
c223da83 | 291 | |
d7abad3d | 292 | avg /= samples; |
b0ff22d7 | 293 | avg = (avg + 5) / 10; |
4b91ee8f | 294 | dprint(FD_TIME, "avg: %llu\n", (unsigned long long) avg); |
c223da83 JA |
295 | dprint(FD_TIME, "mean=%f, S=%f\n", mean, S); |
296 | ||
297 | cycles_per_usec = avg; | |
71339117 JA |
298 | inv_cycles_per_usec = 16777216UL / cycles_per_usec; |
299 | dprint(FD_TIME, "inv_cycles_per_usec=%lu\n", inv_cycles_per_usec); | |
e259879e | 300 | return 0; |
09a32402 JA |
301 | } |
302 | #else | |
e259879e | 303 | static int calibrate_cpu_clock(void) |
09a32402 | 304 | { |
919e789d CE |
305 | #ifdef ARCH_CPU_CLOCK_CYCLES_PER_USEC |
306 | return 0; | |
307 | #else | |
e259879e | 308 | return 1; |
09a32402 | 309 | #endif |
919e789d CE |
310 | } |
311 | #endif // ARCH_HAVE_CPU_CLOCK | |
09a32402 | 312 | |
67bf9823 | 313 | #ifndef CONFIG_TLS_THREAD |
5d879392 JA |
314 | void fio_local_clock_init(int is_thread) |
315 | { | |
316 | struct tv_valid *t; | |
317 | ||
572cfb3f | 318 | t = calloc(1, sizeof(*t)); |
9eb271b9 | 319 | if (pthread_setspecific(tv_tls_key, t)) { |
5d879392 | 320 | log_err("fio: can't set TLS key\n"); |
9eb271b9 JA |
321 | assert(0); |
322 | } | |
5d879392 JA |
323 | } |
324 | ||
325 | static void kill_tv_tls_key(void *data) | |
326 | { | |
327 | free(data); | |
328 | } | |
67bf9823 JA |
329 | #else |
330 | void fio_local_clock_init(int is_thread) | |
331 | { | |
332 | } | |
333 | #endif | |
5d879392 | 334 | |
09a32402 JA |
335 | void fio_clock_init(void) |
336 | { | |
01423eae JA |
337 | if (fio_clock_source == fio_clock_source_inited) |
338 | return; | |
339 | ||
67bf9823 | 340 | #ifndef CONFIG_TLS_THREAD |
5d879392 JA |
341 | if (pthread_key_create(&tv_tls_key, kill_tv_tls_key)) |
342 | log_err("fio: can't create TLS key\n"); | |
67bf9823 | 343 | #endif |
5d879392 | 344 | |
01423eae | 345 | fio_clock_source_inited = fio_clock_source; |
e259879e JA |
346 | |
347 | if (calibrate_cpu_clock()) | |
348 | tsc_reliable = 0; | |
fa80feae JA |
349 | |
350 | /* | |
351 | * If the arch sets tsc_reliable != 0, then it must be good enough | |
352 | * to use as THE clock source. For x86 CPUs, this means the TSC | |
353 | * runs at a constant rate and is synced across CPU cores. | |
354 | */ | |
355 | if (tsc_reliable) { | |
356 | if (!fio_clock_source_set) | |
357 | fio_clock_source = CS_CPUCLOCK; | |
358 | } else if (fio_clock_source == CS_CPUCLOCK) | |
359 | log_info("fio: clocksource=cpu may not be reliable\n"); | |
c223da83 JA |
360 | } |
361 | ||
1f440ece | 362 | uint64_t utime_since(const struct timeval *s, const struct timeval *e) |
be4ecfdf | 363 | { |
39ab7da2 | 364 | long sec, usec; |
aa60bc58 | 365 | uint64_t ret; |
39ab7da2 JA |
366 | |
367 | sec = e->tv_sec - s->tv_sec; | |
368 | usec = e->tv_usec - s->tv_usec; | |
369 | if (sec > 0 && usec < 0) { | |
370 | sec--; | |
371 | usec += 1000000; | |
372 | } | |
373 | ||
374 | /* | |
375 | * time warp bug on some kernels? | |
376 | */ | |
377 | if (sec < 0 || (sec == 0 && usec < 0)) | |
378 | return 0; | |
379 | ||
380 | ret = sec * 1000000ULL + usec; | |
381 | ||
382 | return ret; | |
be4ecfdf JA |
383 | } |
384 | ||
1f440ece | 385 | uint64_t utime_since_now(const struct timeval *s) |
be4ecfdf | 386 | { |
39ab7da2 JA |
387 | struct timeval t; |
388 | ||
389 | fio_gettime(&t, NULL); | |
390 | return utime_since(s, &t); | |
be4ecfdf | 391 | } |
783a3eb1 | 392 | |
1f440ece | 393 | uint64_t mtime_since(const struct timeval *s, const struct timeval *e) |
783a3eb1 | 394 | { |
39ab7da2 | 395 | long sec, usec, ret; |
783a3eb1 | 396 | |
39ab7da2 JA |
397 | sec = e->tv_sec - s->tv_sec; |
398 | usec = e->tv_usec - s->tv_usec; | |
399 | if (sec > 0 && usec < 0) { | |
400 | sec--; | |
401 | usec += 1000000; | |
783a3eb1 JA |
402 | } |
403 | ||
39ab7da2 JA |
404 | if (sec < 0 || (sec == 0 && usec < 0)) |
405 | return 0; | |
406 | ||
407 | sec *= 1000UL; | |
408 | usec /= 1000UL; | |
409 | ret = sec + usec; | |
410 | ||
411 | return ret; | |
783a3eb1 JA |
412 | } |
413 | ||
1f440ece | 414 | uint64_t mtime_since_now(const struct timeval *s) |
783a3eb1 | 415 | { |
39ab7da2 JA |
416 | struct timeval t; |
417 | void *p = __builtin_return_address(0); | |
783a3eb1 | 418 | |
39ab7da2 JA |
419 | fio_gettime(&t, p); |
420 | return mtime_since(s, &t); | |
421 | } | |
783a3eb1 | 422 | |
1f440ece | 423 | uint64_t time_since_now(const struct timeval *s) |
39ab7da2 JA |
424 | { |
425 | return mtime_since_now(s) / 1000; | |
783a3eb1 | 426 | } |
7d11f871 | 427 | |
67bf9823 JA |
428 | #if defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK) && \ |
429 | defined(CONFIG_SFAA) | |
7d11f871 JA |
430 | |
431 | #define CLOCK_ENTRIES 100000 | |
432 | ||
433 | struct clock_entry { | |
58002f9a JA |
434 | uint32_t seq; |
435 | uint32_t cpu; | |
ba458c2f | 436 | uint64_t tsc; |
7d11f871 JA |
437 | }; |
438 | ||
439 | struct clock_thread { | |
440 | pthread_t thread; | |
441 | int cpu; | |
442 | pthread_mutex_t lock; | |
443 | pthread_mutex_t started; | |
58002f9a | 444 | uint32_t *seq; |
7d11f871 JA |
445 | struct clock_entry *entries; |
446 | }; | |
447 | ||
58002f9a | 448 | static inline uint32_t atomic32_inc_return(uint32_t *seq) |
7d11f871 JA |
449 | { |
450 | return 1 + __sync_fetch_and_add(seq, 1); | |
451 | } | |
452 | ||
453 | static void *clock_thread_fn(void *data) | |
454 | { | |
455 | struct clock_thread *t = data; | |
456 | struct clock_entry *c; | |
457 | os_cpu_mask_t cpu_mask; | |
58002f9a | 458 | uint32_t last_seq; |
7d11f871 JA |
459 | int i; |
460 | ||
461 | memset(&cpu_mask, 0, sizeof(cpu_mask)); | |
462 | fio_cpu_set(&cpu_mask, t->cpu); | |
463 | ||
464 | if (fio_setaffinity(gettid(), cpu_mask) == -1) { | |
465 | log_err("clock setaffinity failed\n"); | |
466 | return (void *) 1; | |
467 | } | |
468 | ||
7d11f871 | 469 | pthread_mutex_lock(&t->lock); |
b9b3498e | 470 | pthread_mutex_unlock(&t->started); |
7d11f871 | 471 | |
58002f9a | 472 | last_seq = 0; |
7d11f871 JA |
473 | c = &t->entries[0]; |
474 | for (i = 0; i < CLOCK_ENTRIES; i++, c++) { | |
58002f9a JA |
475 | uint32_t seq; |
476 | uint64_t tsc; | |
7d11f871 JA |
477 | |
478 | c->cpu = t->cpu; | |
479 | do { | |
58002f9a JA |
480 | seq = atomic32_inc_return(t->seq); |
481 | if (seq < last_seq) | |
482 | break; | |
7d11f871 JA |
483 | tsc = get_cpu_clock(); |
484 | } while (seq != *t->seq); | |
485 | ||
486 | c->seq = seq; | |
487 | c->tsc = tsc; | |
488 | } | |
489 | ||
0f78b22c JA |
490 | log_info("cs: cpu%3d: %llu clocks seen\n", t->cpu, |
491 | (unsigned long long) t->entries[i - 1].tsc - t->entries[0].tsc); | |
58002f9a | 492 | |
e259879e JA |
493 | /* |
494 | * The most common platform clock breakage is returning zero | |
495 | * indefinitely. Check for that and return failure. | |
496 | */ | |
58002f9a | 497 | if (!t->entries[i - 1].tsc && !t->entries[0].tsc) |
e259879e JA |
498 | return (void *) 1; |
499 | ||
7d11f871 JA |
500 | return NULL; |
501 | } | |
502 | ||
503 | static int clock_cmp(const void *p1, const void *p2) | |
504 | { | |
505 | const struct clock_entry *c1 = p1; | |
506 | const struct clock_entry *c2 = p2; | |
507 | ||
b9b3498e JA |
508 | if (c1->seq == c2->seq) |
509 | log_err("cs: bug in atomic sequence!\n"); | |
510 | ||
7d11f871 JA |
511 | return c1->seq - c2->seq; |
512 | } | |
513 | ||
514 | int fio_monotonic_clocktest(void) | |
515 | { | |
8a1db9a1 | 516 | struct clock_thread *cthreads; |
7d11f871 JA |
517 | unsigned int nr_cpus = cpus_online(); |
518 | struct clock_entry *entries; | |
814917be | 519 | unsigned long tentries, failed = 0; |
80da8a8f | 520 | struct clock_entry *prev, *this; |
58002f9a | 521 | uint32_t seq = 0; |
caa3eb1c | 522 | unsigned int i; |
7d11f871 | 523 | |
d5e3f5d8 JA |
524 | log_info("cs: reliable_tsc: %s\n", tsc_reliable ? "yes" : "no"); |
525 | ||
b5b571a3 | 526 | #ifdef FIO_INC_DEBUG |
4f1d43c2 | 527 | fio_debug |= 1U << FD_TIME; |
b5b571a3 | 528 | #endif |
4f1d43c2 | 529 | calibrate_cpu_clock(); |
b5b571a3 | 530 | #ifdef FIO_INC_DEBUG |
4f1d43c2 | 531 | fio_debug &= ~(1U << FD_TIME); |
b5b571a3 | 532 | #endif |
4f1d43c2 | 533 | |
8a1db9a1 | 534 | cthreads = malloc(nr_cpus * sizeof(struct clock_thread)); |
7d11f871 JA |
535 | tentries = CLOCK_ENTRIES * nr_cpus; |
536 | entries = malloc(tentries * sizeof(struct clock_entry)); | |
537 | ||
538 | log_info("cs: Testing %u CPUs\n", nr_cpus); | |
539 | ||
540 | for (i = 0; i < nr_cpus; i++) { | |
8a1db9a1 | 541 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
542 | |
543 | t->cpu = i; | |
544 | t->seq = &seq; | |
545 | t->entries = &entries[i * CLOCK_ENTRIES]; | |
546 | pthread_mutex_init(&t->lock, NULL); | |
547 | pthread_mutex_init(&t->started, NULL); | |
548 | pthread_mutex_lock(&t->lock); | |
6b0110cd JA |
549 | if (pthread_create(&t->thread, NULL, clock_thread_fn, t)) { |
550 | failed++; | |
551 | nr_cpus = i; | |
552 | break; | |
553 | } | |
7d11f871 JA |
554 | } |
555 | ||
556 | for (i = 0; i < nr_cpus; i++) { | |
8a1db9a1 | 557 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
558 | |
559 | pthread_mutex_lock(&t->started); | |
560 | } | |
561 | ||
562 | for (i = 0; i < nr_cpus; i++) { | |
8a1db9a1 | 563 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
564 | |
565 | pthread_mutex_unlock(&t->lock); | |
566 | } | |
567 | ||
814917be | 568 | for (i = 0; i < nr_cpus; i++) { |
8a1db9a1 | 569 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
570 | void *ret; |
571 | ||
572 | pthread_join(t->thread, &ret); | |
573 | if (ret) | |
574 | failed++; | |
575 | } | |
8a1db9a1 | 576 | free(cthreads); |
7d11f871 JA |
577 | |
578 | if (failed) { | |
4e0a8fa2 | 579 | log_err("Clocksource test: %lu threads failed\n", failed); |
7d11f871 JA |
580 | goto err; |
581 | } | |
582 | ||
583 | qsort(entries, tentries, sizeof(struct clock_entry), clock_cmp); | |
584 | ||
585 | for (failed = i = 0; i < tentries; i++) { | |
80da8a8f | 586 | this = &entries[i]; |
7d11f871 JA |
587 | |
588 | if (!i) { | |
589 | prev = this; | |
590 | continue; | |
591 | } | |
592 | ||
593 | if (prev->tsc > this->tsc) { | |
594 | uint64_t diff = prev->tsc - this->tsc; | |
595 | ||
4e0a8fa2 JA |
596 | log_info("cs: CPU clock mismatch (diff=%llu):\n", |
597 | (unsigned long long) diff); | |
598 | log_info("\t CPU%3u: TSC=%llu, SEQ=%u\n", prev->cpu, (unsigned long long) prev->tsc, prev->seq); | |
599 | log_info("\t CPU%3u: TSC=%llu, SEQ=%u\n", this->cpu, (unsigned long long) this->tsc, this->seq); | |
7d11f871 JA |
600 | failed++; |
601 | } | |
602 | ||
603 | prev = this; | |
604 | } | |
605 | ||
606 | if (failed) | |
607 | log_info("cs: Failed: %lu\n", failed); | |
608 | else | |
609 | log_info("cs: Pass!\n"); | |
610 | ||
611 | err: | |
612 | free(entries); | |
613 | return !!failed; | |
614 | } | |
615 | ||
616 | #else /* defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK) */ | |
617 | ||
618 | int fio_monotonic_clocktest(void) | |
619 | { | |
620 | log_info("cs: current platform does not support CPU clocks\n"); | |
621 | return 0; | |
622 | } | |
623 | ||
624 | #endif |