#include "fio.h"
-unsigned long utime_since(struct timeval *s, struct timeval *e)
-{
- double sec, usec;
+static struct timespec genesis;
+static unsigned long ns_granularity;
- sec = e->tv_sec - s->tv_sec;
- usec = e->tv_usec - s->tv_usec;
- if (sec > 0 && usec < 0) {
- sec--;
- usec += 1000000;
- }
+void timespec_add_msec(struct timespec *ts, unsigned int msec)
+{
+ uint64_t adj_nsec = 1000000ULL * msec;
- sec *= (double) 1000000;
+ ts->tv_nsec += adj_nsec;
+ if (adj_nsec >= 1000000000) {
+ uint64_t adj_sec = adj_nsec / 1000000000;
- return sec + usec;
+ ts->tv_nsec -= adj_sec * 1000000000;
+ ts->tv_sec += adj_sec;
+ }
+ if (ts->tv_nsec >= 1000000000){
+ ts->tv_nsec -= 1000000000;
+ ts->tv_sec++;
+ }
}
-static unsigned long utime_since_now(struct timeval *s)
+/*
+ * busy looping version for the last few usec
+ */
+uint64_t usec_spin(unsigned int usec)
{
- struct timeval t;
+ struct timespec start;
+ uint64_t t;
+
+ fio_gettime(&start, NULL);
+ while ((t = utime_since_now(&start)) < usec)
+ nop;
- gettimeofday(&t, NULL);
- return utime_since(s, &t);
+ return t;
}
-unsigned long mtime_since(struct timeval *s, struct timeval *e)
+uint64_t usec_sleep(struct thread_data *td, unsigned long usec)
{
- double sec, usec;
+ struct timespec req;
+ struct timespec tv;
+ uint64_t t = 0;
- sec = e->tv_sec - s->tv_sec;
- usec = e->tv_usec - s->tv_usec;
- if (sec > 0 && usec < 0) {
- sec--;
- usec += 1000000;
- }
+ do {
+ unsigned long ts = usec;
+
+ if (usec < ns_granularity) {
+ t += usec_spin(usec);
+ break;
+ }
- sec *= (double) 1000;
- usec /= (double) 1000;
+ ts = usec - ns_granularity;
- return sec + usec;
-}
+ if (ts >= 1000000) {
+ req.tv_sec = ts / 1000000;
+ ts -= 1000000 * req.tv_sec;
+ } else
+ req.tv_sec = 0;
-unsigned long mtime_since_now(struct timeval *s)
-{
- struct timeval t;
+ req.tv_nsec = ts * 1000;
+ fio_gettime(&tv, NULL);
- gettimeofday(&t, NULL);
- return mtime_since(s, &t);
+ if (nanosleep(&req, NULL) < 0)
+ break;
+
+ ts = utime_since_now(&tv);
+ t += ts;
+ if (ts >= usec)
+ break;
+
+ usec -= ts;
+ } while (!td->terminate);
+
+ return t;
}
-unsigned long time_since_now(struct timeval *s)
+uint64_t time_since_genesis(void)
{
- return mtime_since_now(s) / 1000;
+ return time_since_now(&genesis);
}
-/*
- * busy looping version for the last few usec
- */
-void __usec_sleep(unsigned int usec)
+uint64_t mtime_since_genesis(void)
{
- struct timeval start;
-
- gettimeofday(&start, NULL);
- while (utime_since_now(&start) < usec)
- nop;
+ return mtime_since_now(&genesis);
}
-void usec_sleep(struct thread_data *td, unsigned long usec)
+uint64_t utime_since_genesis(void)
{
- struct timespec req, rem;
+ return utime_since_now(&genesis);
+}
- req.tv_sec = usec / 1000000;
- req.tv_nsec = usec * 1000 - req.tv_sec * 1000000;
+bool in_ramp_time(struct thread_data *td)
+{
+ return td->o.ramp_time && !td->ramp_time_over;
+}
- do {
- if (usec < 5000) {
- __usec_sleep(usec);
- break;
- }
+static bool parent_update_ramp(struct thread_data *td)
+{
+ struct thread_data *parent = td->parent;
- rem.tv_sec = rem.tv_nsec = 0;
- if (nanosleep(&req, &rem) < 0)
- break;
+ if (!parent || parent->ramp_time_over)
+ return false;
- if ((rem.tv_sec + rem.tv_nsec) == 0)
- break;
+ reset_all_stats(parent);
+ parent->ramp_time_over = true;
+ td_set_runstate(parent, TD_RAMP);
+ return true;
+}
- req.tv_nsec = rem.tv_nsec;
- req.tv_sec = rem.tv_sec;
+bool ramp_time_over(struct thread_data *td)
+{
+ if (!td->o.ramp_time || td->ramp_time_over)
+ return true;
+
+ if (utime_since_now(&td->epoch) >= td->o.ramp_time) {
+ td->ramp_time_over = true;
+ reset_all_stats(td);
+ reset_io_stats(td);
+ td_set_runstate(td, TD_RAMP);
+
+ /*
+ * If we have a parent, the parent isn't doing IO. Hence
+ * the parent never enters do_io(), which will switch us
+ * from RAMP -> RUNNING. Do this manually here.
+ */
+ if (parent_update_ramp(td))
+ td_set_runstate(td, TD_RUNNING);
+
+ return true;
+ }
- usec = rem.tv_sec * 1000000 + rem.tv_nsec / 1000;
- } while (!td->terminate);
+ return false;
}
-void rate_throttle(struct thread_data *td, unsigned long time_spent,
- unsigned int bytes)
+void fio_time_init(void)
{
- unsigned long usec_cycle;
+ int i;
- if (!td->rate)
- return;
+ fio_clock_init();
- usec_cycle = td->rate_usec_cycle * (bytes / td->min_bs);
+ /*
+ * Check the granularity of the nanosleep function
+ */
+ for (i = 0; i < 10; i++) {
+ struct timespec tv, ts;
+ unsigned long elapsed;
- if (time_spent < usec_cycle) {
- unsigned long s = usec_cycle - time_spent;
+ fio_gettime(&tv, NULL);
+ ts.tv_sec = 0;
+ ts.tv_nsec = 1000;
- td->rate_pending_usleep += s;
- if (td->rate_pending_usleep >= 100000) {
- usec_sleep(td, td->rate_pending_usleep);
- td->rate_pending_usleep = 0;
- }
- } else {
- long overtime = time_spent - usec_cycle;
+ nanosleep(&ts, NULL);
+ elapsed = utime_since_now(&tv);
- td->rate_pending_usleep -= overtime;
+ if (elapsed > ns_granularity)
+ ns_granularity = elapsed;
}
}
+
+void set_genesis_time(void)
+{
+ fio_gettime(&genesis, NULL);
+}
+
+void set_epoch_time(struct thread_data *td, int log_unix_epoch)
+{
+ fio_gettime(&td->epoch, NULL);
+ if (log_unix_epoch) {
+ struct timeval tv;
+ gettimeofday(&tv, NULL);
+ td->unix_epoch = (unsigned long long)(tv.tv_sec) * 1000 +
+ (unsigned long long)(tv.tv_usec) / 1000;
+ }
+}
+
+void fill_start_time(struct timespec *t)
+{
+ memcpy(t, &genesis, sizeof(genesis));
+}
projects / fio.git / blobdiff