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; |
b3fa625b | 19 | static uint64_t max_cycles_for_mult; |
09a32402 | 20 | #endif |
4de98eb0 | 21 | int tsc_reliable = 0; |
5d879392 JA |
22 | |
23 | struct tv_valid { | |
ba458c2f | 24 | uint64_t last_cycles; |
02dcf81c JA |
25 | int last_tv_valid; |
26 | int warned; | |
5d879392 | 27 | }; |
67bf9823 | 28 | #ifdef CONFIG_TLS_THREAD |
b4ea84da | 29 | static __thread struct tv_valid static_tv_valid; |
67bf9823 | 30 | #else |
5d879392 | 31 | static pthread_key_t tv_tls_key; |
67bf9823 | 32 | #endif |
02bcaa8c | 33 | |
16de1bf9 | 34 | enum fio_cs fio_clock_source = FIO_PREFERRED_CLOCK_SOURCE; |
fa80feae | 35 | int fio_clock_source_set = 0; |
10aa136b | 36 | static enum fio_cs fio_clock_source_inited = CS_INVAL; |
c223da83 | 37 | |
02bcaa8c JA |
38 | #ifdef FIO_DEBUG_TIME |
39 | ||
40 | #define HASH_BITS 8 | |
41 | #define HASH_SIZE (1 << HASH_BITS) | |
42 | ||
01743ee1 | 43 | static struct flist_head hash[HASH_SIZE]; |
02bcaa8c JA |
44 | static int gtod_inited; |
45 | ||
46 | struct gtod_log { | |
01743ee1 | 47 | struct flist_head list; |
02bcaa8c JA |
48 | void *caller; |
49 | unsigned long calls; | |
50 | }; | |
51 | ||
52 | static struct gtod_log *find_hash(void *caller) | |
53 | { | |
54 | unsigned long h = hash_ptr(caller, HASH_BITS); | |
01743ee1 | 55 | struct flist_head *entry; |
02bcaa8c | 56 | |
01743ee1 JA |
57 | flist_for_each(entry, &hash[h]) { |
58 | struct gtod_log *log = flist_entry(entry, struct gtod_log, | |
59 | list); | |
02bcaa8c JA |
60 | |
61 | if (log->caller == caller) | |
62 | return log; | |
63 | } | |
64 | ||
65 | return NULL; | |
66 | } | |
67 | ||
68 | static struct gtod_log *find_log(void *caller) | |
69 | { | |
70 | struct gtod_log *log = find_hash(caller); | |
71 | ||
72 | if (!log) { | |
73 | unsigned long h; | |
74 | ||
75 | log = malloc(sizeof(*log)); | |
01743ee1 | 76 | INIT_FLIST_HEAD(&log->list); |
02bcaa8c JA |
77 | log->caller = caller; |
78 | log->calls = 0; | |
79 | ||
80 | h = hash_ptr(caller, HASH_BITS); | |
01743ee1 | 81 | flist_add_tail(&log->list, &hash[h]); |
02bcaa8c JA |
82 | } |
83 | ||
84 | return log; | |
85 | } | |
86 | ||
87 | static void gtod_log_caller(void *caller) | |
88 | { | |
89 | if (gtod_inited) { | |
90 | struct gtod_log *log = find_log(caller); | |
91 | ||
92 | log->calls++; | |
93 | } | |
94 | } | |
95 | ||
96 | static void fio_exit fio_dump_gtod(void) | |
97 | { | |
98 | unsigned long total_calls = 0; | |
99 | int i; | |
100 | ||
101 | for (i = 0; i < HASH_SIZE; i++) { | |
01743ee1 | 102 | struct flist_head *entry; |
02bcaa8c JA |
103 | struct gtod_log *log; |
104 | ||
01743ee1 JA |
105 | flist_for_each(entry, &hash[i]) { |
106 | log = flist_entry(entry, struct gtod_log, list); | |
02bcaa8c | 107 | |
5ec10eaa JA |
108 | printf("function %p, calls %lu\n", log->caller, |
109 | log->calls); | |
02bcaa8c JA |
110 | total_calls += log->calls; |
111 | } | |
112 | } | |
113 | ||
114 | printf("Total %lu gettimeofday\n", total_calls); | |
115 | } | |
116 | ||
117 | static void fio_init gtod_init(void) | |
118 | { | |
119 | int i; | |
120 | ||
121 | for (i = 0; i < HASH_SIZE; i++) | |
01743ee1 | 122 | INIT_FLIST_HEAD(&hash[i]); |
02bcaa8c JA |
123 | |
124 | gtod_inited = 1; | |
125 | } | |
126 | ||
127 | #endif /* FIO_DEBUG_TIME */ | |
128 | ||
67bf9823 | 129 | #ifdef CONFIG_CLOCK_GETTIME |
9ff1c070 JA |
130 | static int fill_clock_gettime(struct timespec *ts) |
131 | { | |
67bf9823 | 132 | #ifdef CONFIG_CLOCK_MONOTONIC |
9ff1c070 JA |
133 | return clock_gettime(CLOCK_MONOTONIC, ts); |
134 | #else | |
135 | return clock_gettime(CLOCK_REALTIME, ts); | |
136 | #endif | |
137 | } | |
1e97cce9 | 138 | #endif |
67bf9823 | 139 | |
9eb271b9 | 140 | static void __fio_gettime(struct timeval *tp) |
02bcaa8c | 141 | { |
93f0b09a | 142 | struct tv_valid *tv; |
5d879392 | 143 | |
67bf9823 JA |
144 | #ifdef CONFIG_TLS_THREAD |
145 | tv = &static_tv_valid; | |
146 | #else | |
93f0b09a | 147 | tv = pthread_getspecific(tv_tls_key); |
67bf9823 | 148 | #endif |
93f0b09a | 149 | |
c223da83 | 150 | switch (fio_clock_source) { |
67bf9823 | 151 | #ifdef CONFIG_GETTIMEOFDAY |
c223da83 | 152 | case CS_GTOD: |
02bcaa8c | 153 | gettimeofday(tp, NULL); |
c223da83 | 154 | break; |
67bf9823 JA |
155 | #endif |
156 | #ifdef CONFIG_CLOCK_GETTIME | |
c223da83 | 157 | case CS_CGETTIME: { |
02bcaa8c JA |
158 | struct timespec ts; |
159 | ||
9ff1c070 | 160 | if (fill_clock_gettime(&ts) < 0) { |
c223da83 JA |
161 | log_err("fio: clock_gettime fails\n"); |
162 | assert(0); | |
02bcaa8c JA |
163 | } |
164 | ||
165 | tp->tv_sec = ts.tv_sec; | |
166 | tp->tv_usec = ts.tv_nsec / 1000; | |
c223da83 JA |
167 | break; |
168 | } | |
67bf9823 | 169 | #endif |
c223da83 JA |
170 | #ifdef ARCH_HAVE_CPU_CLOCK |
171 | case CS_CPUCLOCK: { | |
ba458c2f | 172 | uint64_t usecs, t; |
c223da83 JA |
173 | |
174 | t = get_cpu_clock(); | |
02dcf81c JA |
175 | if (t < tv->last_cycles && tv->last_tv_valid && |
176 | !tv->warned) { | |
9eb271b9 | 177 | log_err("fio: CPU clock going back in time\n"); |
02dcf81c JA |
178 | tv->warned = 1; |
179 | } | |
c223da83 | 180 | |
9eb271b9 JA |
181 | tv->last_cycles = t; |
182 | tv->last_tv_valid = 1; | |
919e789d CE |
183 | #ifdef ARCH_CPU_CLOCK_CYCLES_PER_USEC |
184 | usecs = t / ARCH_CPU_CLOCK_CYCLES_PER_USEC; | |
185 | #else | |
b3fa625b JA |
186 | if (t < max_cycles_for_mult) |
187 | usecs = (t * inv_cycles_per_usec) / 16777216UL; | |
188 | else | |
189 | usecs = t / cycles_per_usec; | |
919e789d | 190 | #endif |
c223da83 JA |
191 | tp->tv_sec = usecs / 1000000; |
192 | tp->tv_usec = usecs % 1000000; | |
c223da83 JA |
193 | break; |
194 | } | |
195 | #endif | |
196 | default: | |
197 | log_err("fio: invalid clock source %d\n", fio_clock_source); | |
198 | break; | |
02bcaa8c | 199 | } |
67bf9823 JA |
200 | } |
201 | ||
202 | #ifdef FIO_DEBUG_TIME | |
203 | void fio_gettime(struct timeval *tp, void *caller) | |
204 | #else | |
205 | void fio_gettime(struct timeval *tp, void fio_unused *caller) | |
206 | #endif | |
207 | { | |
67bf9823 JA |
208 | #ifdef FIO_DEBUG_TIME |
209 | if (!caller) | |
210 | caller = __builtin_return_address(0); | |
211 | ||
212 | gtod_log_caller(caller); | |
213 | #endif | |
27325ed5 | 214 | if (fio_unlikely(fio_gettime_offload(tp))) |
67bf9823 | 215 | return; |
67bf9823 | 216 | |
9eb271b9 | 217 | __fio_gettime(tp); |
02bcaa8c | 218 | } |
be4ecfdf | 219 | |
919e789d | 220 | #if defined(ARCH_HAVE_CPU_CLOCK) && !defined(ARCH_CPU_CLOCK_CYCLES_PER_USEC) |
c223da83 JA |
221 | static unsigned long get_cycles_per_usec(void) |
222 | { | |
223 | struct timeval s, e; | |
ba458c2f | 224 | uint64_t c_s, c_e; |
67bf9823 | 225 | enum fio_cs old_cs = fio_clock_source; |
c223da83 | 226 | |
67bf9823 JA |
227 | #ifdef CONFIG_CLOCK_GETTIME |
228 | fio_clock_source = CS_CGETTIME; | |
229 | #else | |
230 | fio_clock_source = CS_GTOD; | |
231 | #endif | |
232 | __fio_gettime(&s); | |
9ff1c070 | 233 | |
c223da83 JA |
234 | c_s = get_cpu_clock(); |
235 | do { | |
ba458c2f | 236 | uint64_t elapsed; |
c223da83 | 237 | |
67bf9823 | 238 | __fio_gettime(&e); |
9ff1c070 | 239 | |
c223da83 | 240 | elapsed = utime_since(&s, &e); |
486332e5 | 241 | if (elapsed >= 1280) { |
c223da83 JA |
242 | c_e = get_cpu_clock(); |
243 | break; | |
244 | } | |
245 | } while (1); | |
246 | ||
67bf9823 | 247 | fio_clock_source = old_cs; |
c011000d | 248 | return (c_e - c_s + 127) >> 7; |
c223da83 JA |
249 | } |
250 | ||
fa80feae JA |
251 | #define NR_TIME_ITERS 50 |
252 | ||
e259879e | 253 | static int calibrate_cpu_clock(void) |
c223da83 JA |
254 | { |
255 | double delta, mean, S; | |
ba458c2f | 256 | uint64_t avg, cycles[NR_TIME_ITERS]; |
c223da83 JA |
257 | int i, samples; |
258 | ||
c223da83 JA |
259 | cycles[0] = get_cycles_per_usec(); |
260 | S = delta = mean = 0.0; | |
fa80feae | 261 | for (i = 0; i < NR_TIME_ITERS; i++) { |
c223da83 JA |
262 | cycles[i] = get_cycles_per_usec(); |
263 | delta = cycles[i] - mean; | |
264 | if (delta) { | |
265 | mean += delta / (i + 1.0); | |
266 | S += delta * (cycles[i] - mean); | |
267 | } | |
268 | } | |
269 | ||
e259879e JA |
270 | /* |
271 | * The most common platform clock breakage is returning zero | |
272 | * indefinitely. Check for that and return failure. | |
273 | */ | |
274 | if (!cycles[0] && !cycles[NR_TIME_ITERS - 1]) | |
275 | return 1; | |
276 | ||
fa80feae | 277 | S = sqrt(S / (NR_TIME_ITERS - 1.0)); |
c223da83 JA |
278 | |
279 | samples = avg = 0; | |
fa80feae | 280 | for (i = 0; i < NR_TIME_ITERS; i++) { |
c223da83 JA |
281 | double this = cycles[i]; |
282 | ||
03e20d68 | 283 | if ((fmax(this, mean) - fmin(this, mean)) > S) |
c223da83 JA |
284 | continue; |
285 | samples++; | |
286 | avg += this; | |
287 | } | |
288 | ||
fa80feae | 289 | S /= (double) NR_TIME_ITERS; |
89db727d | 290 | mean /= 10.0; |
c223da83 | 291 | |
fa80feae | 292 | for (i = 0; i < NR_TIME_ITERS; i++) |
4b91ee8f JA |
293 | dprint(FD_TIME, "cycles[%d]=%llu\n", i, |
294 | (unsigned long long) cycles[i] / 10); | |
c223da83 | 295 | |
d7abad3d | 296 | avg /= samples; |
b0ff22d7 | 297 | avg = (avg + 5) / 10; |
4b91ee8f | 298 | dprint(FD_TIME, "avg: %llu\n", (unsigned long long) avg); |
c223da83 JA |
299 | dprint(FD_TIME, "mean=%f, S=%f\n", mean, S); |
300 | ||
301 | cycles_per_usec = avg; | |
71339117 | 302 | inv_cycles_per_usec = 16777216UL / cycles_per_usec; |
b3fa625b | 303 | max_cycles_for_mult = ~0ULL / inv_cycles_per_usec; |
71339117 | 304 | dprint(FD_TIME, "inv_cycles_per_usec=%lu\n", inv_cycles_per_usec); |
e259879e | 305 | return 0; |
09a32402 JA |
306 | } |
307 | #else | |
e259879e | 308 | static int calibrate_cpu_clock(void) |
09a32402 | 309 | { |
919e789d CE |
310 | #ifdef ARCH_CPU_CLOCK_CYCLES_PER_USEC |
311 | return 0; | |
312 | #else | |
e259879e | 313 | return 1; |
09a32402 | 314 | #endif |
919e789d CE |
315 | } |
316 | #endif // ARCH_HAVE_CPU_CLOCK | |
09a32402 | 317 | |
67bf9823 | 318 | #ifndef CONFIG_TLS_THREAD |
5d879392 JA |
319 | void fio_local_clock_init(int is_thread) |
320 | { | |
321 | struct tv_valid *t; | |
322 | ||
572cfb3f | 323 | t = calloc(1, sizeof(*t)); |
9eb271b9 | 324 | if (pthread_setspecific(tv_tls_key, t)) { |
5d879392 | 325 | log_err("fio: can't set TLS key\n"); |
9eb271b9 JA |
326 | assert(0); |
327 | } | |
5d879392 JA |
328 | } |
329 | ||
330 | static void kill_tv_tls_key(void *data) | |
331 | { | |
332 | free(data); | |
333 | } | |
67bf9823 JA |
334 | #else |
335 | void fio_local_clock_init(int is_thread) | |
336 | { | |
337 | } | |
338 | #endif | |
5d879392 | 339 | |
09a32402 JA |
340 | void fio_clock_init(void) |
341 | { | |
01423eae JA |
342 | if (fio_clock_source == fio_clock_source_inited) |
343 | return; | |
344 | ||
67bf9823 | 345 | #ifndef CONFIG_TLS_THREAD |
5d879392 JA |
346 | if (pthread_key_create(&tv_tls_key, kill_tv_tls_key)) |
347 | log_err("fio: can't create TLS key\n"); | |
67bf9823 | 348 | #endif |
5d879392 | 349 | |
01423eae | 350 | fio_clock_source_inited = fio_clock_source; |
e259879e JA |
351 | |
352 | if (calibrate_cpu_clock()) | |
353 | tsc_reliable = 0; | |
fa80feae JA |
354 | |
355 | /* | |
356 | * If the arch sets tsc_reliable != 0, then it must be good enough | |
357 | * to use as THE clock source. For x86 CPUs, this means the TSC | |
358 | * runs at a constant rate and is synced across CPU cores. | |
359 | */ | |
360 | if (tsc_reliable) { | |
361 | if (!fio_clock_source_set) | |
362 | fio_clock_source = CS_CPUCLOCK; | |
363 | } else if (fio_clock_source == CS_CPUCLOCK) | |
364 | log_info("fio: clocksource=cpu may not be reliable\n"); | |
c223da83 JA |
365 | } |
366 | ||
1f440ece | 367 | uint64_t utime_since(const struct timeval *s, const struct timeval *e) |
be4ecfdf | 368 | { |
39ab7da2 | 369 | long sec, usec; |
aa60bc58 | 370 | uint64_t ret; |
39ab7da2 JA |
371 | |
372 | sec = e->tv_sec - s->tv_sec; | |
373 | usec = e->tv_usec - s->tv_usec; | |
374 | if (sec > 0 && usec < 0) { | |
375 | sec--; | |
376 | usec += 1000000; | |
377 | } | |
378 | ||
379 | /* | |
380 | * time warp bug on some kernels? | |
381 | */ | |
382 | if (sec < 0 || (sec == 0 && usec < 0)) | |
383 | return 0; | |
384 | ||
385 | ret = sec * 1000000ULL + usec; | |
386 | ||
387 | return ret; | |
be4ecfdf JA |
388 | } |
389 | ||
1f440ece | 390 | uint64_t utime_since_now(const struct timeval *s) |
be4ecfdf | 391 | { |
39ab7da2 JA |
392 | struct timeval t; |
393 | ||
394 | fio_gettime(&t, NULL); | |
395 | return utime_since(s, &t); | |
be4ecfdf | 396 | } |
783a3eb1 | 397 | |
1f440ece | 398 | uint64_t mtime_since(const struct timeval *s, const struct timeval *e) |
783a3eb1 | 399 | { |
39ab7da2 | 400 | long sec, usec, ret; |
783a3eb1 | 401 | |
39ab7da2 JA |
402 | sec = e->tv_sec - s->tv_sec; |
403 | usec = e->tv_usec - s->tv_usec; | |
404 | if (sec > 0 && usec < 0) { | |
405 | sec--; | |
406 | usec += 1000000; | |
783a3eb1 JA |
407 | } |
408 | ||
39ab7da2 JA |
409 | if (sec < 0 || (sec == 0 && usec < 0)) |
410 | return 0; | |
411 | ||
412 | sec *= 1000UL; | |
413 | usec /= 1000UL; | |
414 | ret = sec + usec; | |
415 | ||
416 | return ret; | |
783a3eb1 JA |
417 | } |
418 | ||
1f440ece | 419 | uint64_t mtime_since_now(const struct timeval *s) |
783a3eb1 | 420 | { |
39ab7da2 JA |
421 | struct timeval t; |
422 | void *p = __builtin_return_address(0); | |
783a3eb1 | 423 | |
39ab7da2 JA |
424 | fio_gettime(&t, p); |
425 | return mtime_since(s, &t); | |
426 | } | |
783a3eb1 | 427 | |
1f440ece | 428 | uint64_t time_since_now(const struct timeval *s) |
39ab7da2 JA |
429 | { |
430 | return mtime_since_now(s) / 1000; | |
783a3eb1 | 431 | } |
7d11f871 | 432 | |
67bf9823 JA |
433 | #if defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK) && \ |
434 | defined(CONFIG_SFAA) | |
7d11f871 JA |
435 | |
436 | #define CLOCK_ENTRIES 100000 | |
437 | ||
438 | struct clock_entry { | |
58002f9a JA |
439 | uint32_t seq; |
440 | uint32_t cpu; | |
ba458c2f | 441 | uint64_t tsc; |
7d11f871 JA |
442 | }; |
443 | ||
444 | struct clock_thread { | |
445 | pthread_t thread; | |
446 | int cpu; | |
447 | pthread_mutex_t lock; | |
448 | pthread_mutex_t started; | |
58002f9a | 449 | uint32_t *seq; |
7d11f871 JA |
450 | struct clock_entry *entries; |
451 | }; | |
452 | ||
58002f9a | 453 | static inline uint32_t atomic32_inc_return(uint32_t *seq) |
7d11f871 JA |
454 | { |
455 | return 1 + __sync_fetch_and_add(seq, 1); | |
456 | } | |
457 | ||
458 | static void *clock_thread_fn(void *data) | |
459 | { | |
460 | struct clock_thread *t = data; | |
461 | struct clock_entry *c; | |
462 | os_cpu_mask_t cpu_mask; | |
58002f9a | 463 | uint32_t last_seq; |
7d11f871 JA |
464 | int i; |
465 | ||
466 | memset(&cpu_mask, 0, sizeof(cpu_mask)); | |
467 | fio_cpu_set(&cpu_mask, t->cpu); | |
468 | ||
469 | if (fio_setaffinity(gettid(), cpu_mask) == -1) { | |
470 | log_err("clock setaffinity failed\n"); | |
471 | return (void *) 1; | |
472 | } | |
473 | ||
7d11f871 | 474 | pthread_mutex_lock(&t->lock); |
b9b3498e | 475 | pthread_mutex_unlock(&t->started); |
7d11f871 | 476 | |
58002f9a | 477 | last_seq = 0; |
7d11f871 JA |
478 | c = &t->entries[0]; |
479 | for (i = 0; i < CLOCK_ENTRIES; i++, c++) { | |
58002f9a JA |
480 | uint32_t seq; |
481 | uint64_t tsc; | |
7d11f871 JA |
482 | |
483 | c->cpu = t->cpu; | |
484 | do { | |
58002f9a JA |
485 | seq = atomic32_inc_return(t->seq); |
486 | if (seq < last_seq) | |
487 | break; | |
7d11f871 JA |
488 | tsc = get_cpu_clock(); |
489 | } while (seq != *t->seq); | |
490 | ||
491 | c->seq = seq; | |
492 | c->tsc = tsc; | |
493 | } | |
494 | ||
0f78b22c JA |
495 | log_info("cs: cpu%3d: %llu clocks seen\n", t->cpu, |
496 | (unsigned long long) t->entries[i - 1].tsc - t->entries[0].tsc); | |
58002f9a | 497 | |
e259879e JA |
498 | /* |
499 | * The most common platform clock breakage is returning zero | |
500 | * indefinitely. Check for that and return failure. | |
501 | */ | |
58002f9a | 502 | if (!t->entries[i - 1].tsc && !t->entries[0].tsc) |
e259879e JA |
503 | return (void *) 1; |
504 | ||
7d11f871 JA |
505 | return NULL; |
506 | } | |
507 | ||
508 | static int clock_cmp(const void *p1, const void *p2) | |
509 | { | |
510 | const struct clock_entry *c1 = p1; | |
511 | const struct clock_entry *c2 = p2; | |
512 | ||
b9b3498e JA |
513 | if (c1->seq == c2->seq) |
514 | log_err("cs: bug in atomic sequence!\n"); | |
515 | ||
7d11f871 JA |
516 | return c1->seq - c2->seq; |
517 | } | |
518 | ||
519 | int fio_monotonic_clocktest(void) | |
520 | { | |
8a1db9a1 | 521 | struct clock_thread *cthreads; |
7d11f871 JA |
522 | unsigned int nr_cpus = cpus_online(); |
523 | struct clock_entry *entries; | |
814917be | 524 | unsigned long tentries, failed = 0; |
80da8a8f | 525 | struct clock_entry *prev, *this; |
58002f9a | 526 | uint32_t seq = 0; |
caa3eb1c | 527 | unsigned int i; |
7d11f871 | 528 | |
d5e3f5d8 JA |
529 | log_info("cs: reliable_tsc: %s\n", tsc_reliable ? "yes" : "no"); |
530 | ||
b5b571a3 | 531 | #ifdef FIO_INC_DEBUG |
4f1d43c2 | 532 | fio_debug |= 1U << FD_TIME; |
b5b571a3 | 533 | #endif |
4f1d43c2 | 534 | calibrate_cpu_clock(); |
b5b571a3 | 535 | #ifdef FIO_INC_DEBUG |
4f1d43c2 | 536 | fio_debug &= ~(1U << FD_TIME); |
b5b571a3 | 537 | #endif |
4f1d43c2 | 538 | |
8a1db9a1 | 539 | cthreads = malloc(nr_cpus * sizeof(struct clock_thread)); |
7d11f871 JA |
540 | tentries = CLOCK_ENTRIES * nr_cpus; |
541 | entries = malloc(tentries * sizeof(struct clock_entry)); | |
542 | ||
543 | log_info("cs: Testing %u CPUs\n", nr_cpus); | |
544 | ||
545 | for (i = 0; i < nr_cpus; i++) { | |
8a1db9a1 | 546 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
547 | |
548 | t->cpu = i; | |
549 | t->seq = &seq; | |
550 | t->entries = &entries[i * CLOCK_ENTRIES]; | |
551 | pthread_mutex_init(&t->lock, NULL); | |
552 | pthread_mutex_init(&t->started, NULL); | |
553 | pthread_mutex_lock(&t->lock); | |
6b0110cd JA |
554 | if (pthread_create(&t->thread, NULL, clock_thread_fn, t)) { |
555 | failed++; | |
556 | nr_cpus = i; | |
557 | break; | |
558 | } | |
7d11f871 JA |
559 | } |
560 | ||
561 | for (i = 0; i < nr_cpus; i++) { | |
8a1db9a1 | 562 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
563 | |
564 | pthread_mutex_lock(&t->started); | |
565 | } | |
566 | ||
567 | for (i = 0; i < nr_cpus; i++) { | |
8a1db9a1 | 568 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
569 | |
570 | pthread_mutex_unlock(&t->lock); | |
571 | } | |
572 | ||
814917be | 573 | for (i = 0; i < nr_cpus; i++) { |
8a1db9a1 | 574 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
575 | void *ret; |
576 | ||
577 | pthread_join(t->thread, &ret); | |
578 | if (ret) | |
579 | failed++; | |
580 | } | |
8a1db9a1 | 581 | free(cthreads); |
7d11f871 JA |
582 | |
583 | if (failed) { | |
4e0a8fa2 | 584 | log_err("Clocksource test: %lu threads failed\n", failed); |
7d11f871 JA |
585 | goto err; |
586 | } | |
587 | ||
588 | qsort(entries, tentries, sizeof(struct clock_entry), clock_cmp); | |
589 | ||
590 | for (failed = i = 0; i < tentries; i++) { | |
80da8a8f | 591 | this = &entries[i]; |
7d11f871 JA |
592 | |
593 | if (!i) { | |
594 | prev = this; | |
595 | continue; | |
596 | } | |
597 | ||
598 | if (prev->tsc > this->tsc) { | |
599 | uint64_t diff = prev->tsc - this->tsc; | |
600 | ||
4e0a8fa2 JA |
601 | log_info("cs: CPU clock mismatch (diff=%llu):\n", |
602 | (unsigned long long) diff); | |
603 | log_info("\t CPU%3u: TSC=%llu, SEQ=%u\n", prev->cpu, (unsigned long long) prev->tsc, prev->seq); | |
604 | log_info("\t CPU%3u: TSC=%llu, SEQ=%u\n", this->cpu, (unsigned long long) this->tsc, this->seq); | |
7d11f871 JA |
605 | failed++; |
606 | } | |
607 | ||
608 | prev = this; | |
609 | } | |
610 | ||
611 | if (failed) | |
612 | log_info("cs: Failed: %lu\n", failed); | |
613 | else | |
614 | log_info("cs: Pass!\n"); | |
615 | ||
616 | err: | |
617 | free(entries); | |
618 | return !!failed; | |
619 | } | |
620 | ||
621 | #else /* defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK) */ | |
622 | ||
623 | int fio_monotonic_clocktest(void) | |
624 | { | |
625 | log_info("cs: current platform does not support CPU clocks\n"); | |
626 | return 0; | |
627 | } | |
628 | ||
629 | #endif |