176 lines
3 KiB
C
176 lines
3 KiB
C
#include <time.h>
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#include <sys/time.h>
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#include "fio.h"
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static struct timeval genesis;
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static unsigned long ns_granularity;
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void timeval_add_msec(struct timeval *tv, unsigned int msec)
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{
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unsigned long adj_usec = 1000 * msec;
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tv->tv_usec += adj_usec;
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if (adj_usec >= 1000000) {
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unsigned long adj_sec = adj_usec / 1000000;
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tv->tv_usec -= adj_sec * 1000000;
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tv->tv_sec += adj_sec;
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}
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if (tv->tv_usec >= 1000000){
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tv->tv_usec -= 1000000;
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tv->tv_sec++;
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}
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}
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/*
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* busy looping version for the last few usec
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*/
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uint64_t usec_spin(unsigned int usec)
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{
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struct timeval start;
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uint64_t t;
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fio_gettime(&start, NULL);
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while ((t = utime_since_now(&start)) < usec)
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nop;
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return t;
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}
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uint64_t usec_sleep(struct thread_data *td, unsigned long usec)
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{
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struct timespec req;
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struct timeval tv;
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uint64_t t = 0;
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do {
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unsigned long ts = usec;
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if (usec < ns_granularity) {
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t += usec_spin(usec);
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break;
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}
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ts = usec - ns_granularity;
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if (ts >= 1000000) {
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req.tv_sec = ts / 1000000;
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ts -= 1000000 * req.tv_sec;
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} else
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req.tv_sec = 0;
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req.tv_nsec = ts * 1000;
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fio_gettime(&tv, NULL);
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if (nanosleep(&req, NULL) < 0)
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break;
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ts = utime_since_now(&tv);
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t += ts;
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if (ts >= usec)
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break;
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usec -= ts;
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} while (!td->terminate);
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return t;
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}
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uint64_t time_since_genesis(void)
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{
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return time_since_now(&genesis);
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}
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uint64_t mtime_since_genesis(void)
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{
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return mtime_since_now(&genesis);
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}
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uint64_t utime_since_genesis(void)
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{
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return utime_since_now(&genesis);
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}
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bool in_ramp_time(struct thread_data *td)
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{
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return td->o.ramp_time && !td->ramp_time_over;
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}
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static void parent_update_ramp(struct thread_data *td)
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{
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struct thread_data *parent = td->parent;
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if (!parent || parent->ramp_time_over)
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return;
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reset_all_stats(parent);
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parent->ramp_time_over = 1;
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td_set_runstate(parent, TD_RAMP);
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}
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bool ramp_time_over(struct thread_data *td)
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{
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struct timeval tv;
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if (!td->o.ramp_time || td->ramp_time_over)
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return true;
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fio_gettime(&tv, NULL);
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if (utime_since(&td->epoch, &tv) >= td->o.ramp_time) {
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td->ramp_time_over = 1;
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reset_all_stats(td);
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td_set_runstate(td, TD_RAMP);
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parent_update_ramp(td);
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return true;
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}
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return false;
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}
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void fio_time_init(void)
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{
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int i;
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fio_clock_init();
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/*
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* Check the granularity of the nanosleep function
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*/
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for (i = 0; i < 10; i++) {
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struct timeval tv;
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struct timespec ts;
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unsigned long elapsed;
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fio_gettime(&tv, NULL);
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ts.tv_sec = 0;
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ts.tv_nsec = 1000;
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nanosleep(&ts, NULL);
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elapsed = utime_since_now(&tv);
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if (elapsed > ns_granularity)
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ns_granularity = elapsed;
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}
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}
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void set_genesis_time(void)
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{
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fio_gettime(&genesis, NULL);
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}
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void set_epoch_time(struct thread_data *td, int log_unix_epoch)
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{
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fio_gettime(&td->epoch, NULL);
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if (log_unix_epoch) {
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struct timeval tv;
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gettimeofday(&tv, NULL);
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td->unix_epoch = (unsigned long long)(tv.tv_sec) * 1000 +
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(unsigned long long)(tv.tv_usec) / 1000;
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}
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}
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void fill_start_time(struct timeval *t)
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{
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memcpy(t, &genesis, sizeof(genesis));
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}
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