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; |
73df3e07 | 20 | static unsigned long long cycles_start, cycles_wrap; |
09a32402 | 21 | #endif |
4de98eb0 | 22 | int tsc_reliable = 0; |
5d879392 JA |
23 | |
24 | struct tv_valid { | |
ba458c2f | 25 | uint64_t last_cycles; |
02dcf81c JA |
26 | int last_tv_valid; |
27 | int warned; | |
5d879392 | 28 | }; |
67bf9823 | 29 | #ifdef CONFIG_TLS_THREAD |
b4ea84da | 30 | static __thread struct tv_valid static_tv_valid; |
67bf9823 | 31 | #else |
5d879392 | 32 | static pthread_key_t tv_tls_key; |
67bf9823 | 33 | #endif |
02bcaa8c | 34 | |
16de1bf9 | 35 | enum fio_cs fio_clock_source = FIO_PREFERRED_CLOCK_SOURCE; |
fa80feae | 36 | int fio_clock_source_set = 0; |
10aa136b | 37 | static enum fio_cs fio_clock_source_inited = CS_INVAL; |
c223da83 | 38 | |
02bcaa8c JA |
39 | #ifdef FIO_DEBUG_TIME |
40 | ||
41 | #define HASH_BITS 8 | |
42 | #define HASH_SIZE (1 << HASH_BITS) | |
43 | ||
01743ee1 | 44 | static struct flist_head hash[HASH_SIZE]; |
02bcaa8c JA |
45 | static int gtod_inited; |
46 | ||
47 | struct gtod_log { | |
01743ee1 | 48 | struct flist_head list; |
02bcaa8c JA |
49 | void *caller; |
50 | unsigned long calls; | |
51 | }; | |
52 | ||
53 | static struct gtod_log *find_hash(void *caller) | |
54 | { | |
55 | unsigned long h = hash_ptr(caller, HASH_BITS); | |
01743ee1 | 56 | struct flist_head *entry; |
02bcaa8c | 57 | |
01743ee1 JA |
58 | flist_for_each(entry, &hash[h]) { |
59 | struct gtod_log *log = flist_entry(entry, struct gtod_log, | |
60 | list); | |
02bcaa8c JA |
61 | |
62 | if (log->caller == caller) | |
63 | return log; | |
64 | } | |
65 | ||
66 | return NULL; | |
67 | } | |
68 | ||
d5e16441 | 69 | static void inc_caller(void *caller) |
02bcaa8c JA |
70 | { |
71 | struct gtod_log *log = find_hash(caller); | |
72 | ||
73 | if (!log) { | |
74 | unsigned long h; | |
75 | ||
76 | log = malloc(sizeof(*log)); | |
01743ee1 | 77 | INIT_FLIST_HEAD(&log->list); |
02bcaa8c JA |
78 | log->caller = caller; |
79 | log->calls = 0; | |
80 | ||
81 | h = hash_ptr(caller, HASH_BITS); | |
01743ee1 | 82 | flist_add_tail(&log->list, &hash[h]); |
02bcaa8c JA |
83 | } |
84 | ||
d5e16441 | 85 | log->calls++; |
02bcaa8c JA |
86 | } |
87 | ||
88 | static void gtod_log_caller(void *caller) | |
89 | { | |
d5e16441 JA |
90 | if (gtod_inited) |
91 | inc_caller(caller); | |
02bcaa8c JA |
92 | } |
93 | ||
94 | static void fio_exit fio_dump_gtod(void) | |
95 | { | |
96 | unsigned long total_calls = 0; | |
97 | int i; | |
98 | ||
99 | for (i = 0; i < HASH_SIZE; i++) { | |
01743ee1 | 100 | struct flist_head *entry; |
02bcaa8c JA |
101 | struct gtod_log *log; |
102 | ||
01743ee1 JA |
103 | flist_for_each(entry, &hash[i]) { |
104 | log = flist_entry(entry, struct gtod_log, list); | |
02bcaa8c | 105 | |
5ec10eaa JA |
106 | printf("function %p, calls %lu\n", log->caller, |
107 | log->calls); | |
02bcaa8c JA |
108 | total_calls += log->calls; |
109 | } | |
110 | } | |
111 | ||
112 | printf("Total %lu gettimeofday\n", total_calls); | |
113 | } | |
114 | ||
115 | static void fio_init gtod_init(void) | |
116 | { | |
117 | int i; | |
118 | ||
119 | for (i = 0; i < HASH_SIZE; i++) | |
01743ee1 | 120 | INIT_FLIST_HEAD(&hash[i]); |
02bcaa8c JA |
121 | |
122 | gtod_inited = 1; | |
123 | } | |
124 | ||
125 | #endif /* FIO_DEBUG_TIME */ | |
126 | ||
67bf9823 | 127 | #ifdef CONFIG_CLOCK_GETTIME |
9ff1c070 JA |
128 | static int fill_clock_gettime(struct timespec *ts) |
129 | { | |
67bf9823 | 130 | #ifdef CONFIG_CLOCK_MONOTONIC |
9ff1c070 JA |
131 | return clock_gettime(CLOCK_MONOTONIC, ts); |
132 | #else | |
133 | return clock_gettime(CLOCK_REALTIME, ts); | |
134 | #endif | |
135 | } | |
1e97cce9 | 136 | #endif |
67bf9823 | 137 | |
9eb271b9 | 138 | static void __fio_gettime(struct timeval *tp) |
02bcaa8c | 139 | { |
93f0b09a | 140 | struct tv_valid *tv; |
5d879392 | 141 | |
67bf9823 JA |
142 | #ifdef CONFIG_TLS_THREAD |
143 | tv = &static_tv_valid; | |
144 | #else | |
93f0b09a | 145 | tv = pthread_getspecific(tv_tls_key); |
67bf9823 | 146 | #endif |
93f0b09a | 147 | |
c223da83 | 148 | switch (fio_clock_source) { |
67bf9823 | 149 | #ifdef CONFIG_GETTIMEOFDAY |
c223da83 | 150 | case CS_GTOD: |
02bcaa8c | 151 | gettimeofday(tp, NULL); |
c223da83 | 152 | break; |
67bf9823 JA |
153 | #endif |
154 | #ifdef CONFIG_CLOCK_GETTIME | |
c223da83 | 155 | case CS_CGETTIME: { |
02bcaa8c JA |
156 | struct timespec ts; |
157 | ||
9ff1c070 | 158 | if (fill_clock_gettime(&ts) < 0) { |
c223da83 JA |
159 | log_err("fio: clock_gettime fails\n"); |
160 | assert(0); | |
02bcaa8c JA |
161 | } |
162 | ||
163 | tp->tv_sec = ts.tv_sec; | |
164 | tp->tv_usec = ts.tv_nsec / 1000; | |
c223da83 JA |
165 | break; |
166 | } | |
67bf9823 | 167 | #endif |
c223da83 JA |
168 | #ifdef ARCH_HAVE_CPU_CLOCK |
169 | case CS_CPUCLOCK: { | |
ba458c2f | 170 | uint64_t usecs, t; |
c223da83 JA |
171 | |
172 | t = get_cpu_clock(); | |
73df3e07 JA |
173 | if (t < cycles_start && !cycles_wrap) |
174 | cycles_wrap = 1; | |
175 | else if (cycles_wrap && t >= cycles_start) { | |
176 | if (!tv->warned) { | |
177 | log_err("fio: double CPU clock wrap\n"); | |
178 | tv->warned = 1; | |
179 | } | |
02dcf81c | 180 | } |
c223da83 | 181 | |
73df3e07 | 182 | t -= cycles_start; |
9eb271b9 JA |
183 | tv->last_cycles = t; |
184 | tv->last_tv_valid = 1; | |
919e789d CE |
185 | #ifdef ARCH_CPU_CLOCK_CYCLES_PER_USEC |
186 | usecs = t / ARCH_CPU_CLOCK_CYCLES_PER_USEC; | |
187 | #else | |
b3fa625b JA |
188 | if (t < max_cycles_for_mult) |
189 | usecs = (t * inv_cycles_per_usec) / 16777216UL; | |
190 | else | |
191 | usecs = t / cycles_per_usec; | |
919e789d | 192 | #endif |
c223da83 JA |
193 | tp->tv_sec = usecs / 1000000; |
194 | tp->tv_usec = usecs % 1000000; | |
c223da83 JA |
195 | break; |
196 | } | |
197 | #endif | |
198 | default: | |
199 | log_err("fio: invalid clock source %d\n", fio_clock_source); | |
200 | break; | |
02bcaa8c | 201 | } |
67bf9823 JA |
202 | } |
203 | ||
204 | #ifdef FIO_DEBUG_TIME | |
205 | void fio_gettime(struct timeval *tp, void *caller) | |
206 | #else | |
207 | void fio_gettime(struct timeval *tp, void fio_unused *caller) | |
208 | #endif | |
209 | { | |
67bf9823 JA |
210 | #ifdef FIO_DEBUG_TIME |
211 | if (!caller) | |
212 | caller = __builtin_return_address(0); | |
213 | ||
214 | gtod_log_caller(caller); | |
215 | #endif | |
27325ed5 | 216 | if (fio_unlikely(fio_gettime_offload(tp))) |
67bf9823 | 217 | return; |
67bf9823 | 218 | |
9eb271b9 | 219 | __fio_gettime(tp); |
02bcaa8c | 220 | } |
be4ecfdf | 221 | |
919e789d | 222 | #if defined(ARCH_HAVE_CPU_CLOCK) && !defined(ARCH_CPU_CLOCK_CYCLES_PER_USEC) |
c223da83 JA |
223 | static unsigned long get_cycles_per_usec(void) |
224 | { | |
225 | struct timeval s, e; | |
ba458c2f | 226 | uint64_t c_s, c_e; |
67bf9823 | 227 | enum fio_cs old_cs = fio_clock_source; |
c223da83 | 228 | |
67bf9823 JA |
229 | #ifdef CONFIG_CLOCK_GETTIME |
230 | fio_clock_source = CS_CGETTIME; | |
231 | #else | |
232 | fio_clock_source = CS_GTOD; | |
233 | #endif | |
234 | __fio_gettime(&s); | |
9ff1c070 | 235 | |
c223da83 JA |
236 | c_s = get_cpu_clock(); |
237 | do { | |
ba458c2f | 238 | uint64_t elapsed; |
c223da83 | 239 | |
67bf9823 | 240 | __fio_gettime(&e); |
9ff1c070 | 241 | |
c223da83 | 242 | elapsed = utime_since(&s, &e); |
486332e5 | 243 | if (elapsed >= 1280) { |
c223da83 JA |
244 | c_e = get_cpu_clock(); |
245 | break; | |
246 | } | |
247 | } while (1); | |
248 | ||
67bf9823 | 249 | fio_clock_source = old_cs; |
c011000d | 250 | return (c_e - c_s + 127) >> 7; |
c223da83 JA |
251 | } |
252 | ||
fa80feae JA |
253 | #define NR_TIME_ITERS 50 |
254 | ||
e259879e | 255 | static int calibrate_cpu_clock(void) |
c223da83 JA |
256 | { |
257 | double delta, mean, S; | |
ba458c2f | 258 | uint64_t avg, cycles[NR_TIME_ITERS]; |
c223da83 JA |
259 | int i, samples; |
260 | ||
c223da83 JA |
261 | cycles[0] = get_cycles_per_usec(); |
262 | S = delta = mean = 0.0; | |
fa80feae | 263 | for (i = 0; i < NR_TIME_ITERS; i++) { |
c223da83 JA |
264 | cycles[i] = get_cycles_per_usec(); |
265 | delta = cycles[i] - mean; | |
266 | if (delta) { | |
267 | mean += delta / (i + 1.0); | |
268 | S += delta * (cycles[i] - mean); | |
269 | } | |
270 | } | |
271 | ||
e259879e JA |
272 | /* |
273 | * The most common platform clock breakage is returning zero | |
274 | * indefinitely. Check for that and return failure. | |
275 | */ | |
276 | if (!cycles[0] && !cycles[NR_TIME_ITERS - 1]) | |
277 | return 1; | |
278 | ||
fa80feae | 279 | S = sqrt(S / (NR_TIME_ITERS - 1.0)); |
c223da83 JA |
280 | |
281 | samples = avg = 0; | |
fa80feae | 282 | for (i = 0; i < NR_TIME_ITERS; i++) { |
c223da83 JA |
283 | double this = cycles[i]; |
284 | ||
03e20d68 | 285 | if ((fmax(this, mean) - fmin(this, mean)) > S) |
c223da83 JA |
286 | continue; |
287 | samples++; | |
288 | avg += this; | |
289 | } | |
290 | ||
fa80feae | 291 | S /= (double) NR_TIME_ITERS; |
89db727d | 292 | mean /= 10.0; |
c223da83 | 293 | |
fa80feae | 294 | for (i = 0; i < NR_TIME_ITERS; i++) |
4b91ee8f JA |
295 | dprint(FD_TIME, "cycles[%d]=%llu\n", i, |
296 | (unsigned long long) cycles[i] / 10); | |
c223da83 | 297 | |
d7abad3d | 298 | avg /= samples; |
b0ff22d7 | 299 | avg = (avg + 5) / 10; |
4b91ee8f | 300 | dprint(FD_TIME, "avg: %llu\n", (unsigned long long) avg); |
c223da83 JA |
301 | dprint(FD_TIME, "mean=%f, S=%f\n", mean, S); |
302 | ||
303 | cycles_per_usec = avg; | |
71339117 | 304 | inv_cycles_per_usec = 16777216UL / cycles_per_usec; |
b3fa625b | 305 | max_cycles_for_mult = ~0ULL / inv_cycles_per_usec; |
71339117 | 306 | dprint(FD_TIME, "inv_cycles_per_usec=%lu\n", inv_cycles_per_usec); |
73df3e07 JA |
307 | cycles_start = get_cpu_clock(); |
308 | dprint(FD_TIME, "cycles_start=%llu\n", cycles_start); | |
e259879e | 309 | return 0; |
09a32402 JA |
310 | } |
311 | #else | |
e259879e | 312 | static int calibrate_cpu_clock(void) |
09a32402 | 313 | { |
919e789d CE |
314 | #ifdef ARCH_CPU_CLOCK_CYCLES_PER_USEC |
315 | return 0; | |
316 | #else | |
e259879e | 317 | return 1; |
09a32402 | 318 | #endif |
919e789d CE |
319 | } |
320 | #endif // ARCH_HAVE_CPU_CLOCK | |
09a32402 | 321 | |
67bf9823 | 322 | #ifndef CONFIG_TLS_THREAD |
5d879392 JA |
323 | void fio_local_clock_init(int is_thread) |
324 | { | |
325 | struct tv_valid *t; | |
326 | ||
572cfb3f | 327 | t = calloc(1, sizeof(*t)); |
9eb271b9 | 328 | if (pthread_setspecific(tv_tls_key, t)) { |
5d879392 | 329 | log_err("fio: can't set TLS key\n"); |
9eb271b9 JA |
330 | assert(0); |
331 | } | |
5d879392 JA |
332 | } |
333 | ||
334 | static void kill_tv_tls_key(void *data) | |
335 | { | |
336 | free(data); | |
337 | } | |
67bf9823 JA |
338 | #else |
339 | void fio_local_clock_init(int is_thread) | |
340 | { | |
341 | } | |
342 | #endif | |
5d879392 | 343 | |
09a32402 JA |
344 | void fio_clock_init(void) |
345 | { | |
01423eae JA |
346 | if (fio_clock_source == fio_clock_source_inited) |
347 | return; | |
348 | ||
67bf9823 | 349 | #ifndef CONFIG_TLS_THREAD |
5d879392 JA |
350 | if (pthread_key_create(&tv_tls_key, kill_tv_tls_key)) |
351 | log_err("fio: can't create TLS key\n"); | |
67bf9823 | 352 | #endif |
5d879392 | 353 | |
01423eae | 354 | fio_clock_source_inited = fio_clock_source; |
e259879e JA |
355 | |
356 | if (calibrate_cpu_clock()) | |
357 | tsc_reliable = 0; | |
fa80feae JA |
358 | |
359 | /* | |
360 | * If the arch sets tsc_reliable != 0, then it must be good enough | |
361 | * to use as THE clock source. For x86 CPUs, this means the TSC | |
362 | * runs at a constant rate and is synced across CPU cores. | |
363 | */ | |
364 | if (tsc_reliable) { | |
365 | if (!fio_clock_source_set) | |
366 | fio_clock_source = CS_CPUCLOCK; | |
367 | } else if (fio_clock_source == CS_CPUCLOCK) | |
368 | log_info("fio: clocksource=cpu may not be reliable\n"); | |
c223da83 JA |
369 | } |
370 | ||
1f440ece | 371 | uint64_t utime_since(const struct timeval *s, const struct timeval *e) |
be4ecfdf | 372 | { |
39ab7da2 | 373 | long sec, usec; |
aa60bc58 | 374 | uint64_t ret; |
39ab7da2 JA |
375 | |
376 | sec = e->tv_sec - s->tv_sec; | |
377 | usec = e->tv_usec - s->tv_usec; | |
378 | if (sec > 0 && usec < 0) { | |
379 | sec--; | |
380 | usec += 1000000; | |
381 | } | |
382 | ||
383 | /* | |
384 | * time warp bug on some kernels? | |
385 | */ | |
386 | if (sec < 0 || (sec == 0 && usec < 0)) | |
387 | return 0; | |
388 | ||
389 | ret = sec * 1000000ULL + usec; | |
390 | ||
391 | return ret; | |
be4ecfdf JA |
392 | } |
393 | ||
1f440ece | 394 | uint64_t utime_since_now(const struct timeval *s) |
be4ecfdf | 395 | { |
39ab7da2 JA |
396 | struct timeval t; |
397 | ||
398 | fio_gettime(&t, NULL); | |
399 | return utime_since(s, &t); | |
be4ecfdf | 400 | } |
783a3eb1 | 401 | |
1f440ece | 402 | uint64_t mtime_since(const struct timeval *s, const struct timeval *e) |
783a3eb1 | 403 | { |
39ab7da2 | 404 | long sec, usec, ret; |
783a3eb1 | 405 | |
39ab7da2 JA |
406 | sec = e->tv_sec - s->tv_sec; |
407 | usec = e->tv_usec - s->tv_usec; | |
408 | if (sec > 0 && usec < 0) { | |
409 | sec--; | |
410 | usec += 1000000; | |
783a3eb1 JA |
411 | } |
412 | ||
39ab7da2 JA |
413 | if (sec < 0 || (sec == 0 && usec < 0)) |
414 | return 0; | |
415 | ||
416 | sec *= 1000UL; | |
417 | usec /= 1000UL; | |
418 | ret = sec + usec; | |
419 | ||
420 | return ret; | |
783a3eb1 JA |
421 | } |
422 | ||
1f440ece | 423 | uint64_t mtime_since_now(const struct timeval *s) |
783a3eb1 | 424 | { |
39ab7da2 JA |
425 | struct timeval t; |
426 | void *p = __builtin_return_address(0); | |
783a3eb1 | 427 | |
39ab7da2 JA |
428 | fio_gettime(&t, p); |
429 | return mtime_since(s, &t); | |
430 | } | |
783a3eb1 | 431 | |
1f440ece | 432 | uint64_t time_since_now(const struct timeval *s) |
39ab7da2 JA |
433 | { |
434 | return mtime_since_now(s) / 1000; | |
783a3eb1 | 435 | } |
7d11f871 | 436 | |
67bf9823 JA |
437 | #if defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK) && \ |
438 | defined(CONFIG_SFAA) | |
7d11f871 JA |
439 | |
440 | #define CLOCK_ENTRIES 100000 | |
441 | ||
442 | struct clock_entry { | |
58002f9a JA |
443 | uint32_t seq; |
444 | uint32_t cpu; | |
ba458c2f | 445 | uint64_t tsc; |
7d11f871 JA |
446 | }; |
447 | ||
448 | struct clock_thread { | |
449 | pthread_t thread; | |
450 | int cpu; | |
451 | pthread_mutex_t lock; | |
452 | pthread_mutex_t started; | |
58002f9a | 453 | uint32_t *seq; |
7d11f871 JA |
454 | struct clock_entry *entries; |
455 | }; | |
456 | ||
58002f9a | 457 | static inline uint32_t atomic32_inc_return(uint32_t *seq) |
7d11f871 JA |
458 | { |
459 | return 1 + __sync_fetch_and_add(seq, 1); | |
460 | } | |
461 | ||
462 | static void *clock_thread_fn(void *data) | |
463 | { | |
464 | struct clock_thread *t = data; | |
465 | struct clock_entry *c; | |
466 | os_cpu_mask_t cpu_mask; | |
58002f9a | 467 | uint32_t last_seq; |
7d11f871 JA |
468 | int i; |
469 | ||
470 | memset(&cpu_mask, 0, sizeof(cpu_mask)); | |
471 | fio_cpu_set(&cpu_mask, t->cpu); | |
472 | ||
473 | if (fio_setaffinity(gettid(), cpu_mask) == -1) { | |
474 | log_err("clock setaffinity failed\n"); | |
475 | return (void *) 1; | |
476 | } | |
477 | ||
7d11f871 | 478 | pthread_mutex_lock(&t->lock); |
b9b3498e | 479 | pthread_mutex_unlock(&t->started); |
7d11f871 | 480 | |
58002f9a | 481 | last_seq = 0; |
7d11f871 JA |
482 | c = &t->entries[0]; |
483 | for (i = 0; i < CLOCK_ENTRIES; i++, c++) { | |
58002f9a JA |
484 | uint32_t seq; |
485 | uint64_t tsc; | |
7d11f871 JA |
486 | |
487 | c->cpu = t->cpu; | |
488 | do { | |
58002f9a JA |
489 | seq = atomic32_inc_return(t->seq); |
490 | if (seq < last_seq) | |
491 | break; | |
7d11f871 JA |
492 | tsc = get_cpu_clock(); |
493 | } while (seq != *t->seq); | |
494 | ||
495 | c->seq = seq; | |
496 | c->tsc = tsc; | |
497 | } | |
498 | ||
0f78b22c JA |
499 | log_info("cs: cpu%3d: %llu clocks seen\n", t->cpu, |
500 | (unsigned long long) t->entries[i - 1].tsc - t->entries[0].tsc); | |
58002f9a | 501 | |
e259879e JA |
502 | /* |
503 | * The most common platform clock breakage is returning zero | |
504 | * indefinitely. Check for that and return failure. | |
505 | */ | |
58002f9a | 506 | if (!t->entries[i - 1].tsc && !t->entries[0].tsc) |
e259879e JA |
507 | return (void *) 1; |
508 | ||
7d11f871 JA |
509 | return NULL; |
510 | } | |
511 | ||
512 | static int clock_cmp(const void *p1, const void *p2) | |
513 | { | |
514 | const struct clock_entry *c1 = p1; | |
515 | const struct clock_entry *c2 = p2; | |
516 | ||
b9b3498e JA |
517 | if (c1->seq == c2->seq) |
518 | log_err("cs: bug in atomic sequence!\n"); | |
519 | ||
7d11f871 JA |
520 | return c1->seq - c2->seq; |
521 | } | |
522 | ||
523 | int fio_monotonic_clocktest(void) | |
524 | { | |
8a1db9a1 | 525 | struct clock_thread *cthreads; |
7d11f871 JA |
526 | unsigned int nr_cpus = cpus_online(); |
527 | struct clock_entry *entries; | |
814917be | 528 | unsigned long tentries, failed = 0; |
80da8a8f | 529 | struct clock_entry *prev, *this; |
58002f9a | 530 | uint32_t seq = 0; |
caa3eb1c | 531 | unsigned int i; |
7d11f871 | 532 | |
d5e3f5d8 JA |
533 | log_info("cs: reliable_tsc: %s\n", tsc_reliable ? "yes" : "no"); |
534 | ||
b5b571a3 | 535 | #ifdef FIO_INC_DEBUG |
4f1d43c2 | 536 | fio_debug |= 1U << FD_TIME; |
b5b571a3 | 537 | #endif |
4f1d43c2 | 538 | calibrate_cpu_clock(); |
b5b571a3 | 539 | #ifdef FIO_INC_DEBUG |
4f1d43c2 | 540 | fio_debug &= ~(1U << FD_TIME); |
b5b571a3 | 541 | #endif |
4f1d43c2 | 542 | |
8a1db9a1 | 543 | cthreads = malloc(nr_cpus * sizeof(struct clock_thread)); |
7d11f871 JA |
544 | tentries = CLOCK_ENTRIES * nr_cpus; |
545 | entries = malloc(tentries * sizeof(struct clock_entry)); | |
546 | ||
547 | log_info("cs: Testing %u CPUs\n", nr_cpus); | |
548 | ||
549 | for (i = 0; i < nr_cpus; i++) { | |
8a1db9a1 | 550 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
551 | |
552 | t->cpu = i; | |
553 | t->seq = &seq; | |
554 | t->entries = &entries[i * CLOCK_ENTRIES]; | |
555 | pthread_mutex_init(&t->lock, NULL); | |
556 | pthread_mutex_init(&t->started, NULL); | |
557 | pthread_mutex_lock(&t->lock); | |
6b0110cd JA |
558 | if (pthread_create(&t->thread, NULL, clock_thread_fn, t)) { |
559 | failed++; | |
560 | nr_cpus = i; | |
561 | break; | |
562 | } | |
7d11f871 JA |
563 | } |
564 | ||
565 | for (i = 0; i < nr_cpus; i++) { | |
8a1db9a1 | 566 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
567 | |
568 | pthread_mutex_lock(&t->started); | |
569 | } | |
570 | ||
571 | for (i = 0; i < nr_cpus; i++) { | |
8a1db9a1 | 572 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
573 | |
574 | pthread_mutex_unlock(&t->lock); | |
575 | } | |
576 | ||
814917be | 577 | for (i = 0; i < nr_cpus; i++) { |
8a1db9a1 | 578 | struct clock_thread *t = &cthreads[i]; |
7d11f871 JA |
579 | void *ret; |
580 | ||
581 | pthread_join(t->thread, &ret); | |
582 | if (ret) | |
583 | failed++; | |
584 | } | |
8a1db9a1 | 585 | free(cthreads); |
7d11f871 JA |
586 | |
587 | if (failed) { | |
4e0a8fa2 | 588 | log_err("Clocksource test: %lu threads failed\n", failed); |
7d11f871 JA |
589 | goto err; |
590 | } | |
591 | ||
592 | qsort(entries, tentries, sizeof(struct clock_entry), clock_cmp); | |
593 | ||
594 | for (failed = i = 0; i < tentries; i++) { | |
80da8a8f | 595 | this = &entries[i]; |
7d11f871 JA |
596 | |
597 | if (!i) { | |
598 | prev = this; | |
599 | continue; | |
600 | } | |
601 | ||
602 | if (prev->tsc > this->tsc) { | |
603 | uint64_t diff = prev->tsc - this->tsc; | |
604 | ||
4e0a8fa2 JA |
605 | log_info("cs: CPU clock mismatch (diff=%llu):\n", |
606 | (unsigned long long) diff); | |
607 | log_info("\t CPU%3u: TSC=%llu, SEQ=%u\n", prev->cpu, (unsigned long long) prev->tsc, prev->seq); | |
608 | log_info("\t CPU%3u: TSC=%llu, SEQ=%u\n", this->cpu, (unsigned long long) this->tsc, this->seq); | |
7d11f871 JA |
609 | failed++; |
610 | } | |
611 | ||
612 | prev = this; | |
613 | } | |
614 | ||
615 | if (failed) | |
616 | log_info("cs: Failed: %lu\n", failed); | |
617 | else | |
618 | log_info("cs: Pass!\n"); | |
619 | ||
620 | err: | |
621 | free(entries); | |
622 | return !!failed; | |
623 | } | |
624 | ||
625 | #else /* defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK) */ | |
626 | ||
627 | int fio_monotonic_clocktest(void) | |
628 | { | |
629 | log_info("cs: current platform does not support CPU clocks\n"); | |
630 | return 0; | |
631 | } | |
632 | ||
633 | #endif |