6 static struct timeval genesis;
7 static unsigned long ns_granularity;
9 void timeval_add_msec(struct timeval *tv, unsigned int msec)
11 unsigned long adj_usec = 1000 * msec;
13 tv->tv_usec += adj_usec;
14 if (adj_usec >= 1000000) {
15 unsigned long adj_sec = adj_usec / 1000000;
17 tv->tv_usec -= adj_sec * 1000000;
18 tv->tv_sec += adj_sec;
20 if (tv->tv_usec >= 1000000){
21 tv->tv_usec -= 1000000;
27 * busy looping version for the last few usec
29 uint64_t usec_spin(unsigned int usec)
34 fio_gettime(&start, NULL);
35 while ((t = utime_since_now(&start)) < usec)
41 uint64_t usec_sleep(struct thread_data *td, unsigned long usec)
48 unsigned long ts = usec;
50 if (usec < ns_granularity) {
55 ts = usec - ns_granularity;
58 req.tv_sec = ts / 1000000;
59 ts -= 1000000 * req.tv_sec;
63 req.tv_nsec = ts * 1000;
64 fio_gettime(&tv, NULL);
66 if (nanosleep(&req, NULL) < 0)
69 ts = utime_since_now(&tv);
75 } while (!td->terminate);
80 uint64_t time_since_genesis(void)
82 return time_since_now(&genesis);
85 uint64_t mtime_since_genesis(void)
87 return mtime_since_now(&genesis);
90 uint64_t utime_since_genesis(void)
92 return utime_since_now(&genesis);
95 bool in_ramp_time(struct thread_data *td)
97 return td->o.ramp_time && !td->ramp_time_over;
100 static void parent_update_ramp(struct thread_data *td)
102 struct thread_data *parent = td->parent;
104 if (!parent || parent->ramp_time_over)
107 reset_all_stats(parent);
108 parent->ramp_time_over = 1;
109 td_set_runstate(parent, TD_RAMP);
112 bool ramp_time_over(struct thread_data *td)
116 if (!td->o.ramp_time || td->ramp_time_over)
119 fio_gettime(&tv, NULL);
120 if (utime_since(&td->epoch, &tv) >= td->o.ramp_time) {
121 td->ramp_time_over = 1;
123 td_set_runstate(td, TD_RAMP);
124 parent_update_ramp(td);
131 void fio_time_init(void)
138 * Check the granularity of the nanosleep function
140 for (i = 0; i < 10; i++) {
143 unsigned long elapsed;
145 fio_gettime(&tv, NULL);
149 nanosleep(&ts, NULL);
150 elapsed = utime_since_now(&tv);
152 if (elapsed > ns_granularity)
153 ns_granularity = elapsed;
157 void set_genesis_time(void)
159 fio_gettime(&genesis, NULL);
162 void set_epoch_time(struct thread_data *td, int log_unix_epoch)
164 fio_gettime(&td->epoch, NULL);
165 if (log_unix_epoch) {
167 gettimeofday(&tv, NULL);
168 td->unix_epoch = (unsigned long long)(tv.tv_sec) * 1000 +
169 (unsigned long long)(tv.tv_usec) / 1000;
173 void fill_start_time(struct timeval *t)
175 memcpy(t, &genesis, sizeof(genesis));