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 { | |
23 | struct timeval last_tv; | |
ba458c2f | 24 | uint64_t last_cycles; |
5d879392 JA |
25 | int last_tv_valid; |
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 JA |
138 | |
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(); | |
93f0b09a | 174 | if (tv && t < tv->last_cycles) { |
c223da83 | 175 | dprint(FD_TIME, "CPU clock going back in time\n"); |
93f0b09a JA |
176 | t = tv->last_cycles; |
177 | } else if (tv) | |
178 | tv->last_cycles = t; | |
c223da83 | 179 | |
919e789d CE |
180 | #ifdef ARCH_CPU_CLOCK_CYCLES_PER_USEC |
181 | usecs = t / ARCH_CPU_CLOCK_CYCLES_PER_USEC; | |
182 | #else | |
71339117 | 183 | usecs = (t * inv_cycles_per_usec) / 16777216UL; |
919e789d | 184 | #endif |
c223da83 JA |
185 | tp->tv_sec = usecs / 1000000; |
186 | tp->tv_usec = usecs % 1000000; | |
c223da83 JA |
187 | break; |
188 | } | |
189 | #endif | |
190 | default: | |
191 | log_err("fio: invalid clock source %d\n", fio_clock_source); | |
192 | break; | |
02bcaa8c | 193 | } |
3e488920 | 194 | |
67bf9823 JA |
195 | return tv; |
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 | { | |
204 | struct tv_valid *tv; | |
205 | ||
206 | #ifdef FIO_DEBUG_TIME | |
207 | if (!caller) | |
208 | caller = __builtin_return_address(0); | |
209 | ||
210 | gtod_log_caller(caller); | |
211 | #endif | |
225ba9e3 | 212 | if (fio_unlikely(fio_tv)) { |
67bf9823 JA |
213 | memcpy(tp, fio_tv, sizeof(*tp)); |
214 | return; | |
215 | } | |
216 | ||
217 | tv = __fio_gettime(tp); | |
218 | ||
3e488920 JA |
219 | /* |
220 | * If Linux is using the tsc clock on non-synced processors, | |
221 | * sometimes time can appear to drift backwards. Fix that up. | |
222 | */ | |
93f0b09a JA |
223 | if (tv) { |
224 | if (tv->last_tv_valid) { | |
225 | if (tp->tv_sec < tv->last_tv.tv_sec) | |
226 | tp->tv_sec = tv->last_tv.tv_sec; | |
227 | else if (tv->last_tv.tv_sec == tp->tv_sec && | |
228 | tp->tv_usec < tv->last_tv.tv_usec) | |
229 | tp->tv_usec = tv->last_tv.tv_usec; | |
5d879392 | 230 | } |
93f0b09a JA |
231 | tv->last_tv_valid = 1; |
232 | memcpy(&tv->last_tv, tp, sizeof(*tp)); | |
3e488920 | 233 | } |
02bcaa8c | 234 | } |
be4ecfdf | 235 | |
919e789d | 236 | #if defined(ARCH_HAVE_CPU_CLOCK) && !defined(ARCH_CPU_CLOCK_CYCLES_PER_USEC) |
c223da83 JA |
237 | static unsigned long get_cycles_per_usec(void) |
238 | { | |
239 | struct timeval s, e; | |
ba458c2f | 240 | uint64_t c_s, c_e; |
67bf9823 | 241 | enum fio_cs old_cs = fio_clock_source; |
c223da83 | 242 | |
67bf9823 JA |
243 | #ifdef CONFIG_CLOCK_GETTIME |
244 | fio_clock_source = CS_CGETTIME; | |
245 | #else | |
246 | fio_clock_source = CS_GTOD; | |
247 | #endif | |
248 | __fio_gettime(&s); | |
9ff1c070 | 249 | |
c223da83 JA |
250 | c_s = get_cpu_clock(); |
251 | do { | |
ba458c2f | 252 | uint64_t elapsed; |
c223da83 | 253 | |
67bf9823 | 254 | __fio_gettime(&e); |
9ff1c070 | 255 | |
c223da83 | 256 | elapsed = utime_since(&s, &e); |
486332e5 | 257 | if (elapsed >= 1280) { |
c223da83 JA |
258 | c_e = get_cpu_clock(); |
259 | break; | |
260 | } | |
261 | } while (1); | |
262 | ||
67bf9823 | 263 | fio_clock_source = old_cs; |
c011000d | 264 | return (c_e - c_s + 127) >> 7; |
c223da83 JA |
265 | } |
266 | ||
fa80feae JA |
267 | #define NR_TIME_ITERS 50 |
268 | ||
e259879e | 269 | static int calibrate_cpu_clock(void) |
c223da83 JA |
270 | { |
271 | double delta, mean, S; | |
ba458c2f | 272 | uint64_t avg, cycles[NR_TIME_ITERS]; |
c223da83 JA |
273 | int i, samples; |
274 | ||
c223da83 JA |
275 | cycles[0] = get_cycles_per_usec(); |
276 | S = delta = mean = 0.0; | |
fa80feae | 277 | for (i = 0; i < NR_TIME_ITERS; i++) { |
c223da83 JA |
278 | cycles[i] = get_cycles_per_usec(); |
279 | delta = cycles[i] - mean; | |
280 | if (delta) { | |
281 | mean += delta / (i + 1.0); | |
282 | S += delta * (cycles[i] - mean); | |
283 | } | |
284 | } | |
285 | ||
e259879e JA |
286 | /* |
287 | * The most common platform clock breakage is returning zero | |
288 | * indefinitely. Check for that and return failure. | |
289 | */ | |
290 | if (!cycles[0] && !cycles[NR_TIME_ITERS - 1]) | |
291 | return 1; | |
292 | ||
fa80feae | 293 | S = sqrt(S / (NR_TIME_ITERS - 1.0)); |
c223da83 JA |
294 | |
295 | samples = avg = 0; | |
fa80feae | 296 | for (i = 0; i < NR_TIME_ITERS; i++) { |
c223da83 JA |
297 | double this = cycles[i]; |
298 | ||
03e20d68 | 299 | if ((fmax(this, mean) - fmin(this, mean)) > S) |
c223da83 JA |
300 | continue; |
301 | samples++; | |
302 | avg += this; | |
303 | } | |
304 | ||
fa80feae | 305 | S /= (double) NR_TIME_ITERS; |
89db727d | 306 | mean /= 10.0; |
c223da83 | 307 | |
fa80feae | 308 | for (i = 0; i < NR_TIME_ITERS; i++) |
4b91ee8f JA |
309 | dprint(FD_TIME, "cycles[%d]=%llu\n", i, |
310 | (unsigned long long) cycles[i] / 10); | |
c223da83 | 311 | |
d7abad3d | 312 | avg /= samples; |
b0ff22d7 | 313 | avg = (avg + 5) / 10; |
4b91ee8f | 314 | dprint(FD_TIME, "avg: %llu\n", (unsigned long long) avg); |
c223da83 JA |
315 | dprint(FD_TIME, "mean=%f, S=%f\n", mean, S); |
316 | ||
317 | cycles_per_usec = avg; | |
71339117 JA |
318 | inv_cycles_per_usec = 16777216UL / cycles_per_usec; |
319 | dprint(FD_TIME, "inv_cycles_per_usec=%lu\n", inv_cycles_per_usec); | |
e259879e | 320 | return 0; |
09a32402 JA |
321 | } |
322 | #else | |
e259879e | 323 | static int calibrate_cpu_clock(void) |
09a32402 | 324 | { |
919e789d CE |
325 | #ifdef ARCH_CPU_CLOCK_CYCLES_PER_USEC |
326 | return 0; | |
327 | #else | |
e259879e | 328 | return 1; |
09a32402 | 329 | #endif |
919e789d CE |
330 | } |
331 | #endif // ARCH_HAVE_CPU_CLOCK | |
09a32402 | 332 | |
67bf9823 | 333 | #ifndef CONFIG_TLS_THREAD |
5d879392 JA |
334 | void fio_local_clock_init(int is_thread) |
335 | { | |
336 | struct tv_valid *t; | |
337 | ||
572cfb3f | 338 | t = calloc(1, sizeof(*t)); |
5d879392 JA |
339 | if (pthread_setspecific(tv_tls_key, t)) |
340 | log_err("fio: can't set TLS key\n"); | |
341 | } | |
342 | ||
343 | static void kill_tv_tls_key(void *data) | |
344 | { | |
345 | free(data); | |
346 | } | |
67bf9823 JA |
347 | #else |
348 | void fio_local_clock_init(int is_thread) | |
349 | { | |
350 | } | |
351 | #endif | |
5d879392 | 352 | |
09a32402 JA |
353 | void fio_clock_init(void) |
354 | { | |
01423eae JA |
355 | if (fio_clock_source == fio_clock_source_inited) |
356 | return; | |
357 | ||
67bf9823 | 358 | #ifndef CONFIG_TLS_THREAD |
5d879392 JA |
359 | if (pthread_key_create(&tv_tls_key, kill_tv_tls_key)) |
360 | log_err("fio: can't create TLS key\n"); | |
67bf9823 | 361 | #endif |
5d879392 | 362 | |
01423eae | 363 | fio_clock_source_inited = fio_clock_source; |
e259879e JA |
364 | |
365 | if (calibrate_cpu_clock()) | |
366 | tsc_reliable = 0; | |
fa80feae JA |
367 | |
368 | /* | |
369 | * If the arch sets tsc_reliable != 0, then it must be good enough | |
370 | * to use as THE clock source. For x86 CPUs, this means the TSC | |
371 | * runs at a constant rate and is synced across CPU cores. | |
372 | */ | |
373 | if (tsc_reliable) { | |
374 | if (!fio_clock_source_set) | |
375 | fio_clock_source = CS_CPUCLOCK; | |
376 | } else if (fio_clock_source == CS_CPUCLOCK) | |
377 | log_info("fio: clocksource=cpu may not be reliable\n"); | |
c223da83 JA |
378 | } |
379 | ||
aa60bc58 | 380 | uint64_t utime_since(struct timeval *s, struct timeval *e) |
be4ecfdf | 381 | { |
39ab7da2 | 382 | long sec, usec; |
aa60bc58 | 383 | uint64_t ret; |
39ab7da2 JA |
384 | |
385 | sec = e->tv_sec - s->tv_sec; | |
386 | usec = e->tv_usec - s->tv_usec; | |
387 | if (sec > 0 && usec < 0) { | |
388 | sec--; | |
389 | usec += 1000000; | |
390 | } | |
391 | ||
392 | /* | |
393 | * time warp bug on some kernels? | |
394 | */ | |
395 | if (sec < 0 || (sec == 0 && usec < 0)) | |
396 | return 0; | |
397 | ||
398 | ret = sec * 1000000ULL + usec; | |
399 | ||
400 | return ret; | |
be4ecfdf JA |
401 | } |
402 | ||
aa60bc58 | 403 | uint64_t utime_since_now(struct timeval *s) |
be4ecfdf | 404 | { |
39ab7da2 JA |
405 | struct timeval t; |
406 | ||
407 | fio_gettime(&t, NULL); | |
408 | return utime_since(s, &t); | |
be4ecfdf | 409 | } |
783a3eb1 | 410 | |
aa60bc58 | 411 | uint64_t mtime_since(struct timeval *s, struct timeval *e) |
783a3eb1 | 412 | { |
39ab7da2 | 413 | long sec, usec, ret; |
783a3eb1 | 414 | |
39ab7da2 JA |
415 | sec = e->tv_sec - s->tv_sec; |
416 | usec = e->tv_usec - s->tv_usec; | |
417 | if (sec > 0 && usec < 0) { | |
418 | sec--; | |
419 | usec += 1000000; | |
783a3eb1 JA |
420 | } |
421 | ||
39ab7da2 JA |
422 | if (sec < 0 || (sec == 0 && usec < 0)) |
423 | return 0; | |
424 | ||
425 | sec *= 1000UL; | |
426 | usec /= 1000UL; | |
427 | ret = sec + usec; | |
428 | ||
429 | return ret; | |
783a3eb1 JA |
430 | } |
431 | ||
aa60bc58 | 432 | uint64_t mtime_since_now(struct timeval *s) |
783a3eb1 | 433 | { |
39ab7da2 JA |
434 | struct timeval t; |
435 | void *p = __builtin_return_address(0); | |
783a3eb1 | 436 | |
39ab7da2 JA |
437 | fio_gettime(&t, p); |
438 | return mtime_since(s, &t); | |
439 | } | |
783a3eb1 | 440 | |
aa60bc58 | 441 | uint64_t time_since_now(struct timeval *s) |
39ab7da2 JA |
442 | { |
443 | return mtime_since_now(s) / 1000; | |
783a3eb1 | 444 | } |
7d11f871 | 445 | |
67bf9823 JA |
446 | #if defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK) && \ |
447 | defined(CONFIG_SFAA) | |
7d11f871 JA |
448 | |
449 | #define CLOCK_ENTRIES 100000 | |
450 | ||
451 | struct clock_entry { | |
58002f9a JA |
452 | uint32_t seq; |
453 | uint32_t cpu; | |
ba458c2f | 454 | uint64_t tsc; |
7d11f871 JA |
455 | }; |
456 | ||
457 | struct clock_thread { | |
458 | pthread_t thread; | |
459 | int cpu; | |
460 | pthread_mutex_t lock; | |
461 | pthread_mutex_t started; | |
58002f9a | 462 | uint32_t *seq; |
7d11f871 JA |
463 | struct clock_entry *entries; |
464 | }; | |
465 | ||
58002f9a | 466 | static inline uint32_t atomic32_inc_return(uint32_t *seq) |
7d11f871 JA |
467 | { |
468 | return 1 + __sync_fetch_and_add(seq, 1); | |
469 | } | |
470 | ||
471 | static void *clock_thread_fn(void *data) | |
472 | { | |
473 | struct clock_thread *t = data; | |
474 | struct clock_entry *c; | |
475 | os_cpu_mask_t cpu_mask; | |
58002f9a | 476 | uint32_t last_seq; |
7d11f871 JA |
477 | int i; |
478 | ||
479 | memset(&cpu_mask, 0, sizeof(cpu_mask)); | |
480 | fio_cpu_set(&cpu_mask, t->cpu); | |
481 | ||
482 | if (fio_setaffinity(gettid(), cpu_mask) == -1) { | |
483 | log_err("clock setaffinity failed\n"); | |
484 | return (void *) 1; | |
485 | } | |
486 | ||
7d11f871 | 487 | pthread_mutex_lock(&t->lock); |
b9b3498e | 488 | pthread_mutex_unlock(&t->started); |
7d11f871 | 489 | |
58002f9a | 490 | last_seq = 0; |
7d11f871 JA |
491 | c = &t->entries[0]; |
492 | for (i = 0; i < CLOCK_ENTRIES; i++, c++) { | |
58002f9a JA |
493 | uint32_t seq; |
494 | uint64_t tsc; | |
7d11f871 JA |
495 | |
496 | c->cpu = t->cpu; | |
497 | do { | |
58002f9a JA |
498 | seq = atomic32_inc_return(t->seq); |
499 | if (seq < last_seq) | |
500 | break; | |
7d11f871 JA |
501 | tsc = get_cpu_clock(); |
502 | } while (seq != *t->seq); | |
503 | ||
504 | c->seq = seq; | |
505 | c->tsc = tsc; | |
506 | } | |
507 | ||
0f78b22c JA |
508 | log_info("cs: cpu%3d: %llu clocks seen\n", t->cpu, |
509 | (unsigned long long) t->entries[i - 1].tsc - t->entries[0].tsc); | |
58002f9a | 510 | |
e259879e JA |
511 | /* |
512 | * The most common platform clock breakage is returning zero | |
513 | * indefinitely. Check for that and return failure. | |
514 | */ | |
58002f9a | 515 | if (!t->entries[i - 1].tsc && !t->entries[0].tsc) |
e259879e JA |
516 | return (void *) 1; |
517 | ||
7d11f871 JA |
518 | return NULL; |
519 | } | |
520 | ||
521 | static int clock_cmp(const void *p1, const void *p2) | |
522 | { | |
523 | const struct clock_entry *c1 = p1; | |
524 | const struct clock_entry *c2 = p2; | |
525 | ||
b9b3498e JA |
526 | if (c1->seq == c2->seq) |
527 | log_err("cs: bug in atomic sequence!\n"); | |
528 | ||
7d11f871 JA |
529 | return c1->seq - c2->seq; |
530 | } | |
531 | ||
532 | int fio_monotonic_clocktest(void) | |
533 | { | |
534 | struct clock_thread *threads; | |
535 | unsigned int nr_cpus = cpus_online(); | |
536 | struct clock_entry *entries; | |
814917be | 537 | unsigned long tentries, failed = 0; |
80da8a8f | 538 | struct clock_entry *prev, *this; |
58002f9a | 539 | uint32_t seq = 0; |
caa3eb1c | 540 | unsigned int i; |
7d11f871 | 541 | |
d5e3f5d8 JA |
542 | log_info("cs: reliable_tsc: %s\n", tsc_reliable ? "yes" : "no"); |
543 | ||
4f1d43c2 JA |
544 | fio_debug |= 1U << FD_TIME; |
545 | calibrate_cpu_clock(); | |
546 | fio_debug &= ~(1U << FD_TIME); | |
547 | ||
7d11f871 JA |
548 | threads = malloc(nr_cpus * sizeof(struct clock_thread)); |
549 | tentries = CLOCK_ENTRIES * nr_cpus; | |
550 | entries = malloc(tentries * sizeof(struct clock_entry)); | |
551 | ||
552 | log_info("cs: Testing %u CPUs\n", nr_cpus); | |
553 | ||
554 | for (i = 0; i < nr_cpus; i++) { | |
555 | struct clock_thread *t = &threads[i]; | |
556 | ||
557 | t->cpu = i; | |
558 | t->seq = &seq; | |
559 | t->entries = &entries[i * CLOCK_ENTRIES]; | |
560 | pthread_mutex_init(&t->lock, NULL); | |
561 | pthread_mutex_init(&t->started, NULL); | |
562 | pthread_mutex_lock(&t->lock); | |
6b0110cd JA |
563 | if (pthread_create(&t->thread, NULL, clock_thread_fn, t)) { |
564 | failed++; | |
565 | nr_cpus = i; | |
566 | break; | |
567 | } | |
7d11f871 JA |
568 | } |
569 | ||
570 | for (i = 0; i < nr_cpus; i++) { | |
571 | struct clock_thread *t = &threads[i]; | |
572 | ||
573 | pthread_mutex_lock(&t->started); | |
574 | } | |
575 | ||
576 | for (i = 0; i < nr_cpus; i++) { | |
577 | struct clock_thread *t = &threads[i]; | |
578 | ||
579 | pthread_mutex_unlock(&t->lock); | |
580 | } | |
581 | ||
814917be | 582 | for (i = 0; i < nr_cpus; i++) { |
7d11f871 JA |
583 | struct clock_thread *t = &threads[i]; |
584 | void *ret; | |
585 | ||
586 | pthread_join(t->thread, &ret); | |
587 | if (ret) | |
588 | failed++; | |
589 | } | |
590 | free(threads); | |
591 | ||
592 | if (failed) { | |
4e0a8fa2 | 593 | log_err("Clocksource test: %lu threads failed\n", failed); |
7d11f871 JA |
594 | goto err; |
595 | } | |
596 | ||
597 | qsort(entries, tentries, sizeof(struct clock_entry), clock_cmp); | |
598 | ||
599 | for (failed = i = 0; i < tentries; i++) { | |
80da8a8f | 600 | this = &entries[i]; |
7d11f871 JA |
601 | |
602 | if (!i) { | |
603 | prev = this; | |
604 | continue; | |
605 | } | |
606 | ||
607 | if (prev->tsc > this->tsc) { | |
608 | uint64_t diff = prev->tsc - this->tsc; | |
609 | ||
4e0a8fa2 JA |
610 | log_info("cs: CPU clock mismatch (diff=%llu):\n", |
611 | (unsigned long long) diff); | |
612 | log_info("\t CPU%3u: TSC=%llu, SEQ=%u\n", prev->cpu, (unsigned long long) prev->tsc, prev->seq); | |
613 | log_info("\t CPU%3u: TSC=%llu, SEQ=%u\n", this->cpu, (unsigned long long) this->tsc, this->seq); | |
7d11f871 JA |
614 | failed++; |
615 | } | |
616 | ||
617 | prev = this; | |
618 | } | |
619 | ||
620 | if (failed) | |
621 | log_info("cs: Failed: %lu\n", failed); | |
622 | else | |
623 | log_info("cs: Pass!\n"); | |
624 | ||
625 | err: | |
626 | free(entries); | |
627 | return !!failed; | |
628 | } | |
629 | ||
630 | #else /* defined(FIO_HAVE_CPU_AFFINITY) && defined(ARCH_HAVE_CPU_CLOCK) */ | |
631 | ||
632 | int fio_monotonic_clocktest(void) | |
633 | { | |
634 | log_info("cs: current platform does not support CPU clocks\n"); | |
635 | return 0; | |
636 | } | |
637 | ||
638 | #endif |