Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 1 | #include <time.h> |
| 2 | #include <sys/time.h> |
| 3 | |
| 4 | #include "fio.h" |
| 5 | |
Jens Axboe | 263e529 | 2006-10-18 15:37:01 +0200 | [diff] [blame] | 6 | static struct timeval genesis; |
Jens Axboe | fd84146 | 2007-01-13 12:20:30 +0100 | [diff] [blame] | 7 | static unsigned long ns_granularity; |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame^] | 8 | unsigned long long genesis_cycles; |
Jens Axboe | 263e529 | 2006-10-18 15:37:01 +0200 | [diff] [blame] | 9 | |
Shawn Lewis | 1092731 | 2007-11-21 09:38:13 +0100 | [diff] [blame] | 10 | unsigned long long utime_since(struct timeval *s, struct timeval *e) |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 11 | { |
Shawn Lewis | 1092731 | 2007-11-21 09:38:13 +0100 | [diff] [blame] | 12 | long sec, usec; |
| 13 | unsigned long long ret; |
Jens Axboe | 5ec10ea | 2008-03-06 15:42:00 +0100 | [diff] [blame] | 14 | |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 15 | sec = e->tv_sec - s->tv_sec; |
| 16 | usec = e->tv_usec - s->tv_usec; |
| 17 | if (sec > 0 && usec < 0) { |
| 18 | sec--; |
| 19 | usec += 1000000; |
| 20 | } |
| 21 | |
Jens Axboe | 2bfe24b | 2007-05-21 14:27:32 +0200 | [diff] [blame] | 22 | /* |
| 23 | * time warp bug on some kernels? |
| 24 | */ |
Shawn Lewis | 1092731 | 2007-11-21 09:38:13 +0100 | [diff] [blame] | 25 | if (sec < 0 || (sec == 0 && usec < 0)) |
| 26 | return 0; |
Jens Axboe | 5ec10ea | 2008-03-06 15:42:00 +0100 | [diff] [blame] | 27 | |
Shawn Lewis | 1092731 | 2007-11-21 09:38:13 +0100 | [diff] [blame] | 28 | ret = sec * 1000000ULL + usec; |
Jens Axboe | 5ec10ea | 2008-03-06 15:42:00 +0100 | [diff] [blame] | 29 | |
Jens Axboe | 2bfe24b | 2007-05-21 14:27:32 +0200 | [diff] [blame] | 30 | return ret; |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 31 | } |
| 32 | |
Shawn Lewis | 1092731 | 2007-11-21 09:38:13 +0100 | [diff] [blame] | 33 | unsigned long long utime_since_now(struct timeval *s) |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 34 | { |
| 35 | struct timeval t; |
| 36 | |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 37 | fio_gettime(&t, NULL); |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 38 | return utime_since(s, &t); |
| 39 | } |
| 40 | |
| 41 | unsigned long mtime_since(struct timeval *s, struct timeval *e) |
| 42 | { |
Jens Axboe | 2bfe24b | 2007-05-21 14:27:32 +0200 | [diff] [blame] | 43 | long sec, usec, ret; |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 44 | |
| 45 | sec = e->tv_sec - s->tv_sec; |
| 46 | usec = e->tv_usec - s->tv_usec; |
| 47 | if (sec > 0 && usec < 0) { |
| 48 | sec--; |
| 49 | usec += 1000000; |
| 50 | } |
| 51 | |
Jens Axboe | 64b18e1 | 2007-03-27 10:03:09 +0200 | [diff] [blame] | 52 | sec *= 1000UL; |
| 53 | usec /= 1000UL; |
Jens Axboe | 2bfe24b | 2007-05-21 14:27:32 +0200 | [diff] [blame] | 54 | ret = sec + usec; |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 55 | |
Jens Axboe | 2bfe24b | 2007-05-21 14:27:32 +0200 | [diff] [blame] | 56 | /* |
| 57 | * time warp bug on some kernels? |
| 58 | */ |
| 59 | if (ret < 0) |
| 60 | ret = 0; |
| 61 | |
| 62 | return ret; |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 63 | } |
| 64 | |
| 65 | unsigned long mtime_since_now(struct timeval *s) |
| 66 | { |
| 67 | struct timeval t; |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 68 | void *p = __builtin_return_address(0); |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 69 | |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 70 | fio_gettime(&t, p); |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 71 | return mtime_since(s, &t); |
| 72 | } |
| 73 | |
| 74 | unsigned long time_since_now(struct timeval *s) |
| 75 | { |
| 76 | return mtime_since_now(s) / 1000; |
| 77 | } |
| 78 | |
| 79 | /* |
| 80 | * busy looping version for the last few usec |
| 81 | */ |
Jens Axboe | 6dd6f2c | 2008-12-10 13:24:12 +0100 | [diff] [blame] | 82 | void usec_spin(unsigned int usec) |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 83 | { |
| 84 | struct timeval start; |
| 85 | |
Jens Axboe | 02bcaa8 | 2006-11-24 10:42:00 +0100 | [diff] [blame] | 86 | fio_gettime(&start, NULL); |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 87 | while (utime_since_now(&start) < usec) |
| 88 | nop; |
| 89 | } |
| 90 | |
| 91 | void usec_sleep(struct thread_data *td, unsigned long usec) |
| 92 | { |
Jens Axboe | fd84146 | 2007-01-13 12:20:30 +0100 | [diff] [blame] | 93 | struct timespec req; |
| 94 | struct timeval tv; |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 95 | |
| 96 | do { |
Jens Axboe | fd84146 | 2007-01-13 12:20:30 +0100 | [diff] [blame] | 97 | unsigned long ts = usec; |
| 98 | |
| 99 | if (usec < ns_granularity) { |
Jens Axboe | 6dd6f2c | 2008-12-10 13:24:12 +0100 | [diff] [blame] | 100 | usec_spin(usec); |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 101 | break; |
| 102 | } |
| 103 | |
Jens Axboe | fd84146 | 2007-01-13 12:20:30 +0100 | [diff] [blame] | 104 | ts = usec - ns_granularity; |
| 105 | |
| 106 | if (ts >= 1000000) { |
| 107 | req.tv_sec = ts / 1000000; |
| 108 | ts -= 1000000 * req.tv_sec; |
| 109 | } else |
| 110 | req.tv_sec = 0; |
| 111 | |
| 112 | req.tv_nsec = ts * 1000; |
| 113 | fio_gettime(&tv, NULL); |
| 114 | |
| 115 | if (nanosleep(&req, NULL) < 0) |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 116 | break; |
| 117 | |
Jens Axboe | fd84146 | 2007-01-13 12:20:30 +0100 | [diff] [blame] | 118 | ts = utime_since_now(&tv); |
| 119 | if (ts >= usec) |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 120 | break; |
| 121 | |
Jens Axboe | fd84146 | 2007-01-13 12:20:30 +0100 | [diff] [blame] | 122 | usec -= ts; |
Jens Axboe | 3c39a37 | 2006-06-06 20:56:12 +0200 | [diff] [blame] | 123 | } while (!td->terminate); |
| 124 | } |
| 125 | |
Jens Axboe | 263e529 | 2006-10-18 15:37:01 +0200 | [diff] [blame] | 126 | unsigned long mtime_since_genesis(void) |
| 127 | { |
| 128 | return mtime_since_now(&genesis); |
| 129 | } |
| 130 | |
Jens Axboe | b29ee5b | 2008-09-11 10:17:26 +0200 | [diff] [blame] | 131 | int in_ramp_time(struct thread_data *td) |
| 132 | { |
| 133 | return td->o.ramp_time && !td->ramp_time_over; |
| 134 | } |
| 135 | |
Jens Axboe | 721938a | 2008-09-10 09:46:16 +0200 | [diff] [blame] | 136 | int ramp_time_over(struct thread_data *td) |
| 137 | { |
| 138 | struct timeval tv; |
| 139 | |
| 140 | if (!td->o.ramp_time || td->ramp_time_over) |
| 141 | return 1; |
| 142 | |
| 143 | fio_gettime(&tv, NULL); |
| 144 | if (mtime_since(&td->epoch, &tv) >= td->o.ramp_time * 1000) { |
| 145 | td->ramp_time_over = 1; |
Jens Axboe | b29ee5b | 2008-09-11 10:17:26 +0200 | [diff] [blame] | 146 | reset_all_stats(td); |
| 147 | td_set_runstate(td, TD_RAMP); |
Jens Axboe | 721938a | 2008-09-10 09:46:16 +0200 | [diff] [blame] | 148 | return 1; |
| 149 | } |
| 150 | |
| 151 | return 0; |
| 152 | } |
| 153 | |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame^] | 154 | void fio_init fio_time_init(void) |
Jens Axboe | 263e529 | 2006-10-18 15:37:01 +0200 | [diff] [blame] | 155 | { |
Jens Axboe | fd84146 | 2007-01-13 12:20:30 +0100 | [diff] [blame] | 156 | int i; |
| 157 | |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame^] | 158 | fio_clock_init(); |
| 159 | |
Jens Axboe | fd84146 | 2007-01-13 12:20:30 +0100 | [diff] [blame] | 160 | /* |
| 161 | * Check the granularity of the nanosleep function |
| 162 | */ |
| 163 | for (i = 0; i < 10; i++) { |
| 164 | struct timeval tv; |
| 165 | struct timespec ts; |
| 166 | unsigned long elapsed; |
| 167 | |
| 168 | fio_gettime(&tv, NULL); |
| 169 | ts.tv_sec = 0; |
| 170 | ts.tv_nsec = 1000; |
| 171 | |
| 172 | nanosleep(&ts, NULL); |
| 173 | elapsed = utime_since_now(&tv); |
| 174 | |
| 175 | if (elapsed > ns_granularity) |
| 176 | ns_granularity = elapsed; |
| 177 | } |
Jens Axboe | 263e529 | 2006-10-18 15:37:01 +0200 | [diff] [blame] | 178 | } |
Jens Axboe | 6043c57 | 2006-11-03 11:37:47 +0100 | [diff] [blame] | 179 | |
Jens Axboe | a2f77c9 | 2007-02-22 11:53:00 +0100 | [diff] [blame] | 180 | void set_genesis_time(void) |
| 181 | { |
| 182 | fio_gettime(&genesis, NULL); |
Jens Axboe | c223da8 | 2010-03-24 13:23:53 +0100 | [diff] [blame^] | 183 | genesis_cycles = get_cpu_clock(); |
Jens Axboe | a2f77c9 | 2007-02-22 11:53:00 +0100 | [diff] [blame] | 184 | } |
| 185 | |
Jens Axboe | 6043c57 | 2006-11-03 11:37:47 +0100 | [diff] [blame] | 186 | void fill_start_time(struct timeval *t) |
| 187 | { |
| 188 | memcpy(t, &genesis, sizeof(genesis)); |
| 189 | } |