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 | ||
d5e16441 | 68 | static void inc_caller(void *caller) |
02bcaa8c JA |
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 | ||
d5e16441 | 84 | log->calls++; |
02bcaa8c JA |
85 | } |
86 | ||
87 | static void gtod_log_caller(void *caller) | |
88 | { | |
d5e16441 JA |
89 | if (gtod_inited) |
90 | inc_caller(caller); | |
02bcaa8c JA |
91 | } |
92 | ||
93 | static void fio_exit fio_dump_gtod(void) | |
94 | { | |
95 | unsigned long total_calls = 0; | |
96 | int i; | |
97 | ||
98 | for (i = 0; i < HASH_SIZE; i++) { | |
01743ee1 | 99 | struct flist_head *entry; |
02bcaa8c JA |
100 | struct gtod_log *log; |
101 | ||
01743ee1 JA |
102 | flist_for_each(entry, &hash[i]) { |
103 | log = flist_entry(entry, struct gtod_log, list); | |
02bcaa8c | 104 | |
5ec10eaa JA |
105 | printf("function %p, calls %lu\n", log->caller, |
106 | log->calls); | |
02bcaa8c JA |
107 | total_calls += log->calls; |
108 | } | |
109 | } | |
110 | ||
111 | printf("Total %lu gettimeofday\n", total_calls); | |
112 | } | |
113 | ||
114 | static void fio_init gtod_init(void) | |
115 | { | |
116 | int i; | |
117 | ||
118 | for (i = 0; i < HASH_SIZE; i++) | |
01743ee1 | 119 | INIT_FLIST_HEAD(&hash[i]); |
02bcaa8c JA |
120 | |
121 | gtod_inited = 1; | |
122 | } | |
123 | ||
124 | #endif /* FIO_DEBUG_TIME */ | |
125 | ||
67bf9823 | 126 | #ifdef CONFIG_CLOCK_GETTIME |
9ff1c070 JA |
127 | static int fill_clock_gettime(struct timespec *ts) |
128 | { | |
67bf9823 | 129 | #ifdef CONFIG_CLOCK_MONOTONIC |
9ff1c070 JA |
130 | return clock_gettime(CLOCK_MONOTONIC, ts); |
131 | #else | |
132 | return clock_gettime(CLOCK_REALTIME, ts); | |
133 | #endif | |
134 | } | |
1e97cce9 | 135 | #endif |
67bf9823 | 136 | |
9eb271b9 | 137 | static void __fio_gettime(struct timeval *tp) |
02bcaa8c | 138 | { |
93f0b09a | 139 | struct tv_valid *tv; |
5d879392 | 140 | |
67bf9823 JA |
141 | #ifdef CONFIG_TLS_THREAD |
142 | tv = &static_tv_valid; | |
143 | #else | |
93f0b09a | 144 | tv = pthread_getspecific(tv_tls_key); |
67bf9823 | 145 | #endif |
93f0b09a | 146 | |
c223da83 | 147 | switch (fio_clock_source) { |
67bf9823 | 148 | #ifdef CONFIG_GETTIMEOFDAY |
c223da83 | 149 | case CS_GTOD: |
02bcaa8c | 150 | gettimeofday(tp, NULL); |
c223da83 | 151 | break; |
67bf9823 JA |
152 | #endif |
153 | #ifdef CONFIG_CLOCK_GETTIME | |
c223da83 | 154 | case CS_CGETTIME: { |
02bcaa8c JA |
155 | struct timespec ts; |
156 | ||
9ff1c070 | 157 | if (fill_clock_gettime(&ts) < 0) { |
c223da83 JA |
158 | log_err("fio: clock_gettime fails\n"); |
159 | assert(0); | |
02bcaa8c JA |
160 | } |
161 | ||
162 | tp->tv_sec = ts.tv_sec; | |
163 | tp->tv_usec = ts.tv_nsec / 1000; | |
c223da83 JA |
164 | break; |
165 | } | |
67bf9823 | 166 | #endif |
c223da83 JA |
167 | #ifdef ARCH_HAVE_CPU_CLOCK |
168 | case CS_CPUCLOCK: { | |
ba458c2f | 169 | uint64_t usecs, t; |
c223da83 JA |
170 | |
171 | t = get_cpu_clock(); | |
02dcf81c JA |
172 | if (t < tv->last_cycles && tv->last_tv_valid && |
173 | !tv->warned) { | |
9eb271b9 | 174 | log_err("fio: CPU clock going back in time\n"); |
02dcf81c JA |
175 | tv->warned = 1; |
176 | } | |
c223da83 | 177 | |
9eb271b9 JA |
178 | tv->last_cycles = t; |
179 | tv->last_tv_valid = 1; | |
919e789d CE |
180 | #ifdef ARCH_CPU_CLOCK_CYCLES_PER_USEC |
181 | usecs = t / ARCH_CPU_CLOCK_CYCLES_PER_USEC; | |
182 | #else | |
b3fa625b JA |
183 | if (t < max_cycles_for_mult) |
184 | usecs = (t * inv_cycles_per_usec) / 16777216UL; | |
185 | else | |
186 | usecs = t / cycles_per_usec; | |
919e789d | 187 | #endif |
c223da83 JA |
188 | tp->tv_sec = usecs / 1000000; |
189 | tp->tv_usec = usecs % 1000000; | |
c223da83 JA |
190 | break; |
191 | } | |
192 | #endif | |
193 | default: | |
194 | log_err("fio: invalid clock source %d\n", fio_clock_source); | |
195 | break; | |
02bcaa8c | 196 | } |
67bf9823 JA |
197 | } |
198 | ||
199 | #ifdef FIO_DEBUG_TIME | |
200 | void fio_gettime(struct timeval *tp, void *caller) | |
201 | #else | |
202 | void fio_gettime(struct timeval *tp, void fio_unused *caller) | |
203 | #endif | |
204 | { | |
67bf9823 JA |
205 | #ifdef FIO_DEBUG_TIME |
206 | if (!caller) | |
207 | caller = __builtin_return_address(0); | |
208 | ||
209 | gtod_log_caller(caller); | |
210 | #endif | |
27325ed5 | 211 | if (fio_unlikely(fio_gettime_offload(tp))) |
67bf9823 | 212 | return; |
67bf9823 | 213 | |
9eb271b9 | 214 | __fio_gettime(tp); |
02bcaa8c | 215 | } |
be4ecfdf | 216 | |
919e789d | 217 | #if defined(ARCH_HAVE_CPU_CLOCK) && !defined(ARCH_CPU_CLOCK_CYCLES_PER_USEC) |
c223da83 JA |
218 | static unsigned long get_cycles_per_usec(void) |
219 | { | |
220 | struct timeval s, e; | |
ba458c2f | 221 | uint64_t c_s, c_e; |
67bf9823 | 222 | enum fio_cs old_cs = fio_clock_source; |
c223da83 | 223 | |
67bf9823 JA |
224 | #ifdef CONFIG_CLOCK_GETTIME |
225 | fio_clock_source = CS_CGETTIME; | |
226 | #else | |
227 | fio_clock_source = CS_GTOD; | |
228 | #endif | |
229 | __fio_gettime(&s); | |
9ff1c070 | 230 | |
c223da83 JA |
231 | c_s = get_cpu_clock(); |
232 | do { | |
ba458c2f | 233 | uint64_t elapsed; |
c223da83 | 234 | |
67bf9823 | 235 | __fio_gettime(&e); |
9ff1c070 | 236 | |
c223da83 | 237 | elapsed = utime_since(&s, &e); |
486332e5 | 238 | if (elapsed >= 1280) { |
c223da83 JA |
239 | c_e = get_cpu_clock(); |
240 | break; | |
241 | } | |
242 | } while (1); | |
243 | ||
67bf9823 | 244 | fio_clock_source = old_cs; |
c011000d | 245 | return (c_e - c_s + 127) >> 7; |
c223da83 JA |
246 | } |
247 | ||
fa80feae JA |
248 | #define NR_TIME_ITERS 50 |
249 | ||
e259879e | 250 | static int calibrate_cpu_clock(void) |
c223da83 JA |
251 | { |
252 | double delta, mean, S; | |
ba458c2f | 253 | uint64_t avg, cycles[NR_TIME_ITERS]; |
c223da83 JA |
254 | int i, samples; |
255 | ||
c223da83 JA |
256 | cycles[0] = get_cycles_per_usec(); |
257 | S = delta = mean = 0.0; | |
fa80feae | 258 | for (i = 0; i < NR_TIME_ITERS; i++) { |
c223da83 JA |
259 | cycles[i] = get_cycles_per_usec(); |
260 | delta = cycles[i] - mean; | |
261 | if (delta) { | |
262 | mean += delta / (i + 1.0); | |
263 | S += delta * (cycles[i] - mean); | |
264 | } | |
265 | } | |
266 | ||
e259879e JA |
267 | /* |
268 | * The most common platform clock breakage is returning zero | |
269 | * indefinitely. Check for that and return failure. | |
270 | */ | |
271 | if (!cycles[0] && !cycles[NR_TIME_ITERS - 1]) | |
272 | return 1; | |
273 | ||
fa80feae | 274 | S = sqrt(S / (NR_TIME_ITERS - 1.0)); |
c223da83 JA |
275 | |
276 | samples = avg = 0; | |
fa80feae | 277 | for (i = 0; i < NR_TIME_ITERS; i++) { |
c223da83 JA |
278 | double this = cycles[i]; |
279 | ||
03e20d68 | 280 | if ((fmax(this, mean) - fmin(this, mean)) > S) |
c223da83 JA |
281 | continue; |
282 | samples++; | |
283 | avg += this; | |
284 | } | |
285 | ||
fa80feae | 286 | S /= (double) NR_TIME_ITERS; |
89db727d | 287 | mean /= 10.0; |
c223da83 | 288 | |
fa80feae | 289 | for (i = 0; i < NR_TIME_ITERS; i++) |
4b91ee8f JA |
290 | dprint(FD_TIME, "cycles[%d]=%llu\n", i, |
291 | (unsigned long long) cycles[i] / 10); | |
c223da83 | 292 | |
d7abad3d | 293 | avg /= samples; |
b0ff22d7 | 294 | avg = (avg + 5) / 10; |
4b91ee8f | 295 | dprint(FD_TIME, "avg: %llu\n", (unsigned long long) avg); |
c223da83 JA |
296 | dprint(FD_TIME, "mean=%f, S=%f\n", mean, S); |
297 | ||
298 | cycles_per_usec = avg; | |
71339117 | 299 | inv_cycles_per_usec = 16777216UL / cycles_per_usec; |
b3fa625b | 300 | max_cycles_for_mult = ~0ULL / inv_cycles_per_usec; |
71339117 | 301 | dprint(FD_TIME, "inv_cycles_per_usec=%lu\n", inv_cycles_per_usec); |
e259879e | 302 | return 0; |
09a32402 JA |
303 | } |
304 | #else | |
e259879e | 305 | static int calibrate_cpu_clock(void) |
09a32402 | 306 | { |
919e789d CE |
307 | #ifdef ARCH_CPU_CLOCK_CYCLES_PER_USEC |
308 | return 0; | |
309 | #else | |
e259879e | 310 | return 1; |
09a32402 | 311 | #endif |
919e789d CE |
312 | } |
313 | #endif // ARCH_HAVE_CPU_CLOCK | |
09a32402 | 314 | |
67bf9823 | 315 | #ifndef CONFIG_TLS_THREAD |
5d879392 JA |
316 | void fio_local_clock_init(int is_thread) |
317 | { | |
318 | struct tv_valid *t; | |
319 | ||
572cfb3f | 320 | t = calloc(1, sizeof(*t)); |
9eb271b9 | 321 | if (pthread_setspecific(tv_tls_key, t)) { |
5d879392 | 322 | log_err("fio: can't set TLS key\n"); |
9eb271b9 JA |
323 | assert(0); |
324 | } | |
5d879392 JA |
325 | } |
326 | ||
327 | static void kill_tv_tls_key(void *data) | |
328 | { | |
329 | free(data); | |
330 | } | |
67bf9823 JA |
331 | #else |
332 | void fio_local_clock_init(int is_thread) | |
333 | { | |
334 | } | |
335 | #endif | |
5d879392 | 336 | |
09a32402 JA |
337 | void fio_clock_init(void) |
338 | { | |
01423eae JA |
339 | if (fio_clock_source == fio_clock_source_inited) |
340 | return; | |
341 | ||
67bf9823 | 342 | #ifndef CONFIG_TLS_THREAD |
5d879392 JA |
343 | if (pthread_key_create(&tv_tls_key, kill_tv_tls_key)) |
344 | log_err("fio: can't create TLS key\n"); | |
67bf9823 | 345 | #endif |
5d879392 | 346 | |
01423eae | 347 | fio_clock_source_inited = fio_clock_source; |
e259879e JA |
348 | |
349 | if (calibrate_cpu_clock()) | |
350 | tsc_reliable = 0; | |
fa80feae JA |
351 | |
352 | /* | |
353 | * If the arch sets tsc_reliable != 0, then it must be good enough | |
354 | * to use as THE clock source. For x86 CPUs, this means the TSC | |
355 | * runs at a constant rate and is synced across CPU cores. | |
356 | */ | |
357 | if (tsc_reliable) { | |
358 | if (!fio_clock_source_set) | |
359 | fio_clock_source = CS_CPUCLOCK; | |
360 | } else if (fio_clock_source == CS_CPUCLOCK) | |
361 | log_info("fio: clocksource=cpu may not be reliable\n"); | |
c223da83 JA |
362 | } |
363 | ||
1f440ece | 364 | uint64_t utime_since(const struct timeval *s, const struct timeval *e) |
be4ecfdf | 365 | { |
39ab7da2 | 366 | long sec, usec; |
aa60bc58 | 367 | uint64_t ret; |
39ab7da2 JA |
368 | |
369 | sec = e->tv_sec - s->tv_sec; | |
370 | usec = e->tv_usec - s->tv_usec; | |
371 | if (sec > 0 && usec < 0) { | |
372 | sec--; | |
373 | usec += 1000000; | |
374 | } | |
375 | ||
376 | /* | |
377 | * time warp bug on some kernels? | |
378 | */ | |
379 | if (sec < 0 || (sec == 0 && usec < 0)) | |
380 | return 0; | |
381 | ||
382 | ret = sec * 1000000ULL + usec; | |
383 | ||
384 | return ret; | |
be4ecfdf JA |
385 | } |
386 | ||
1f440ece | 387 | uint64_t utime_since_now(const struct timeval *s) |
be4ecfdf | 388 | { |
39ab7da2 JA |
389 | struct timeval t; |
390 | ||
391 | fio_gettime(&t, NULL); | |
392 | return utime_since(s, &t); | |
be4ecfdf | 393 | } |
783a3eb1 | 394 | |
1f440ece | 395 | uint64_t mtime_since(const struct timeval *s, const struct timeval *e) |
783a3eb1 | 396 | { |
39ab7da2 | 397 | long sec, usec, ret; |
783a3eb1 | 398 | |
39ab7da2 JA |
399 | sec = e->tv_sec - s->tv_sec; |
400 | usec = e->tv_usec - s->tv_usec; | |
401 | if (sec > 0 && usec < 0) { | |
402 | sec--; | |
403 | usec += 1000000; | |
783a3eb1 JA |
404 | } |
405 | ||
39ab7da2 JA |
406 | if (sec < 0 || (sec == 0 && usec < 0)) |
407 | return 0; | |
408 | ||
409 | sec *= 1000UL; | |
410 | usec /= 1000UL; | |
411 | ret = sec + usec; | |
412 | ||
413 | return ret; | |
783a3eb1 JA |
414 | } |
415 | ||
1f440ece | 416 | uint64_t mtime_since_now(const struct timeval *s) |
783a3eb1 | 417 | { |
39ab7da2 JA |
418 | struct timeval t; |
419 | void *p = __builtin_return_address(0); | |
783a3eb1 | 420 | |
39ab7da2 JA |
421 | fio_gettime(&t, p); |
422 | return mtime_since(s, &t); | |
423 | } | |
783a3eb1 | 424 | |
1f440ece | 425 | uint64_t time_since_now(const struct timeval *s) |
39ab7da2 JA |
426 | { |
427 | return mtime_since_now(s) / 1000; | |
783a3eb1 | 428 | } |
7d11f871 | 429 | |
67bf9823 JA |
430 | #if defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK) && \ |
431 | defined(CONFIG_SFAA) | |
7d11f871 JA |
432 | |
433 | #define CLOCK_ENTRIES 100000 | |
434 | ||
435 | struct clock_entry { | |
58002f9a JA |
436 | uint32_t seq; |
437 | uint32_t cpu; | |
ba458c2f | 438 | uint64_t tsc; |
7d11f871 JA |
439 | }; |
440 | ||
441 | struct clock_thread { | |
442 | pthread_t thread; | |
443 | int cpu; | |
444 | pthread_mutex_t lock; | |
445 | pthread_mutex_t started; | |
58002f9a | 446 | uint32_t *seq; |
7d11f871 JA |
447 | struct clock_entry *entries; |
448 | }; | |
449 | ||
58002f9a | 450 | static inline uint32_t atomic32_inc_return(uint32_t *seq) |
7d11f871 JA |
451 | { |
452 | return 1 + __sync_fetch_and_add(seq, 1); | |
453 | } | |
454 | ||
455 | static void *clock_thread_fn(void *data) | |
456 | { | |
457 | struct clock_thread *t = data; | |
458 | struct clock_entry *c; | |
459 | os_cpu_mask_t cpu_mask; | |
58002f9a | 460 | uint32_t last_seq; |
7d11f871 JA |
461 | int i; |
462 | ||
463 | memset(&cpu_mask, 0, sizeof(cpu_mask)); | |
464 | fio_cpu_set(&cpu_mask, t->cpu); | |
465 | ||
466 | if (fio_setaffinity(gettid(), cpu_mask) == -1) { | |
467 | log_err("clock setaffinity failed\n"); | |
468 | return (void *) 1; | |
469 | } | |
470 | ||
7d11f871 | 471 | pthread_mutex_lock(&t->lock); |
b9b3498e | 472 | pthread_mutex_unlock(&t->started); |
7d11f871 | 473 | |
58002f9a | 474 | last_seq = 0; |
7d11f871 JA |
475 | c = &t->entries[0]; |
476 | for (i = 0; i < CLOCK_ENTRIES; i++, c++) { | |
58002f9a JA |
477 | uint32_t seq; |
478 | uint64_t tsc; | |
7d11f871 JA |
479 | |
480 | c->cpu = t->cpu; | |
481 | do { | |
58002f9a JA |
482 | seq = atomic32_inc_return(t->seq); |
483 | if (seq < last_seq) | |
484 | break; | |
7d11f871 JA |
485 | tsc = get_cpu_clock(); |
486 | } while (seq != *t->seq); | |
487 | ||
488 | c->seq = seq; | |
489 | c->tsc = tsc; | |
490 | } | |
491 | ||
0f78b22c JA |
492 | log_info("cs: cpu%3d: %llu clocks seen\n", t->cpu, |
493 | (unsigned long long) t->entries[i - 1].tsc - t->entries[0].tsc); | |
58002f9a | 494 | |
e259879e JA |
495 | /* |
496 | * The most common platform clock breakage is returning zero | |
497 | * indefinitely. Check for that and return failure. | |
498 | */ | |
58002f9a | 499 | if (!t->entries[i - 1].tsc && !t->entries[0].tsc) |
e259879e JA |
500 | return (void *) 1; |
501 | ||
7d11f871 JA |
502 | return NULL; |
503 | } | |
504 | ||
505 | static int clock_cmp(const void *p1, const void *p2) | |
506 | { | |
507 | const struct clock_entry *c1 = p1; | |
508 | const struct clock_entry *c2 = p2; | |
509 | ||
b9b3498e JA |
510 | if (c1->seq == c2->seq) |
511 | log_err("cs: bug in atomic sequence!\n"); | |
512 | ||
7d11f871 JA |
513 | return c1->seq - c2->seq; |
514 | } | |
515 | ||
516 | int fio_monotonic_clocktest(void) | |
517 | { | |
8a1db9a1 | 518 | struct clock_thread *cthreads; |
7d11f871 JA |
519 | unsigned int nr_cpus = cpus_online(); |
520 | struct clock_entry *entries; | |
814917be | 521 | unsigned long tentries, failed = 0; |
80da8a8f | 522 | struct clock_entry *prev, *this; |
58002f9a | 523 | uint32_t seq = 0; |
caa3eb1c | 524 | unsigned int i; |
7d11f871 | 525 | |
d5e3f5d8 JA |
526 | log_info("cs: reliable_tsc: %s\n", tsc_reliable ? "yes" : "no"); |
527 | ||
b5b571a3 | 528 | #ifdef FIO_INC_DEBUG |
4f1d43c2 | 529 | fio_debug |= 1U << FD_TIME; |
b5b571a3 | 530 | #endif |
4f1d43c2 | 531 | calibrate_cpu_clock(); |
b5b571a3 | 532 | #ifdef FIO_INC_DEBUG |
4f1d43c2 | 533 | fio_debug &= ~(1U << FD_TIME); |
b5b571a3 | 534 | #endif |
4f1d43c2 | 535 | |
8a1db9a1 | 536 | cthreads = malloc(nr_cpus * sizeof(struct clock_thread)); |
7d11f871 JA |
537 | tentries = CLOCK_ENTRIES * nr_cpus; |
538 | entries = malloc(tentries * sizeof(struct clock_entry)); | |
539 | ||
540 | log_info("cs: Testing %u CPUs\n", nr_cpus); | |
541 | ||
542 | for (i = 0; i < nr_cpus; i++) { | |
8a1db9a1 | 543 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
544 | |
545 | t->cpu = i; | |
546 | t->seq = &seq; | |
547 | t->entries = &entries[i * CLOCK_ENTRIES]; | |
548 | pthread_mutex_init(&t->lock, NULL); | |
549 | pthread_mutex_init(&t->started, NULL); | |
550 | pthread_mutex_lock(&t->lock); | |
6b0110cd JA |
551 | if (pthread_create(&t->thread, NULL, clock_thread_fn, t)) { |
552 | failed++; | |
553 | nr_cpus = i; | |
554 | break; | |
555 | } | |
7d11f871 JA |
556 | } |
557 | ||
558 | for (i = 0; i < nr_cpus; i++) { | |
8a1db9a1 | 559 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
560 | |
561 | pthread_mutex_lock(&t->started); | |
562 | } | |
563 | ||
564 | for (i = 0; i < nr_cpus; i++) { | |
8a1db9a1 | 565 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
566 | |
567 | pthread_mutex_unlock(&t->lock); | |
568 | } | |
569 | ||
814917be | 570 | for (i = 0; i < nr_cpus; i++) { |
8a1db9a1 | 571 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
572 | void *ret; |
573 | ||
574 | pthread_join(t->thread, &ret); | |
575 | if (ret) | |
576 | failed++; | |
577 | } | |
8a1db9a1 | 578 | free(cthreads); |
7d11f871 JA |
579 | |
580 | if (failed) { | |
4e0a8fa2 | 581 | log_err("Clocksource test: %lu threads failed\n", failed); |
7d11f871 JA |
582 | goto err; |
583 | } | |
584 | ||
585 | qsort(entries, tentries, sizeof(struct clock_entry), clock_cmp); | |
586 | ||
587 | for (failed = i = 0; i < tentries; i++) { | |
80da8a8f | 588 | this = &entries[i]; |
7d11f871 JA |
589 | |
590 | if (!i) { | |
591 | prev = this; | |
592 | continue; | |
593 | } | |
594 | ||
595 | if (prev->tsc > this->tsc) { | |
596 | uint64_t diff = prev->tsc - this->tsc; | |
597 | ||
4e0a8fa2 JA |
598 | log_info("cs: CPU clock mismatch (diff=%llu):\n", |
599 | (unsigned long long) diff); | |
600 | log_info("\t CPU%3u: TSC=%llu, SEQ=%u\n", prev->cpu, (unsigned long long) prev->tsc, prev->seq); | |
601 | log_info("\t CPU%3u: TSC=%llu, SEQ=%u\n", this->cpu, (unsigned long long) this->tsc, this->seq); | |
7d11f871 JA |
602 | failed++; |
603 | } | |
604 | ||
605 | prev = this; | |
606 | } | |
607 | ||
608 | if (failed) | |
609 | log_info("cs: Failed: %lu\n", failed); | |
610 | else | |
611 | log_info("cs: Pass!\n"); | |
612 | ||
613 | err: | |
614 | free(entries); | |
615 | return !!failed; | |
616 | } | |
617 | ||
618 | #else /* defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK) */ | |
619 | ||
620 | int fio_monotonic_clocktest(void) | |
621 | { | |
622 | log_info("cs: current platform does not support CPU clocks\n"); | |
623 | return 0; | |
624 | } | |
625 | ||
626 | #endif |