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#include <time.h>
#include <sys/time.h>
#include "fio.h"
static struct timespec genesis;
static unsigned long ns_granularity;
void timespec_add_msec(struct timespec *ts, unsigned int msec)
{
uint64_t adj_nsec = 1000000ULL * msec;
ts->tv_nsec += adj_nsec;
if (adj_nsec >= 1000000000) {
uint64_t adj_sec = adj_nsec / 1000000000;
ts->tv_nsec -= adj_sec * 1000000000;
ts->tv_sec += adj_sec;
}
if (ts->tv_nsec >= 1000000000){
ts->tv_nsec -= 1000000000;
ts->tv_sec++;
}
}
/*
* busy looping version for the last few usec
*/
uint64_t usec_spin(unsigned int usec)
{
struct timespec start;
uint64_t t;
fio_gettime(&start, NULL);
while ((t = utime_since_now(&start)) < usec)
nop;
return t;
}
/*
* busy loop for a fixed amount of cycles
*/
void cycles_spin(unsigned int n)
{
unsigned long i;
for (i=0; i < n; i++)
nop;
}
uint64_t usec_sleep(struct thread_data *td, unsigned long usec)
{
struct timespec req;
struct timespec tv;
uint64_t t = 0;
do {
unsigned long ts = usec;
if (usec < ns_granularity) {
t += usec_spin(usec);
break;
}
ts = usec - ns_granularity;
if (ts >= 1000000) {
req.tv_sec = ts / 1000000;
ts -= 1000000 * req.tv_sec;
/*
* Limit sleep to ~1 second at most, otherwise we
* don't notice then someone signaled the job to
* exit manually.
*/
if (req.tv_sec > 1)
req.tv_sec = 1;
} else
req.tv_sec = 0;
req.tv_nsec = ts * 1000;
fio_gettime(&tv, NULL);
if (nanosleep(&req, NULL) < 0)
break;
ts = utime_since_now(&tv);
t += ts;
if (ts >= usec)
break;
usec -= ts;
} while (!td->terminate);
return t;
}
uint64_t time_since_genesis(void)
{
return time_since_now(&genesis);
}
uint64_t mtime_since_genesis(void)
{
return mtime_since_now(&genesis);
}
uint64_t utime_since_genesis(void)
{
return utime_since_now(&genesis);
}
bool in_ramp_time(struct thread_data *td)
{
return td->o.ramp_time && !td->ramp_time_over;
}
static bool parent_update_ramp(struct thread_data *td)
{
struct thread_data *parent = td->parent;
if (!parent || parent->ramp_time_over)
return false;
reset_all_stats(parent);
parent->ramp_time_over = true;
td_set_runstate(parent, TD_RAMP);
return true;
}
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;
}
return false;
}
void fio_time_init(void)
{
int i;
fio_clock_init();
/*
* Check the granularity of the nanosleep function
*/
for (i = 0; i < 10; i++) {
struct timespec tv, ts;
unsigned long elapsed;
fio_gettime(&tv, NULL);
ts.tv_sec = 0;
ts.tv_nsec = 1000;
nanosleep(&ts, NULL);
elapsed = utime_since_now(&tv);
if (elapsed > ns_granularity)
ns_granularity = elapsed;
}
}
void set_genesis_time(void)
{
fio_gettime(&genesis, NULL);
}
void set_epoch_time(struct thread_data *td, clockid_t log_alternate_epoch_clock_id, clockid_t job_start_clock_id)
{
struct timespec ts;
fio_gettime(&td->epoch, NULL);
clock_gettime(log_alternate_epoch_clock_id, &ts);
td->alternate_epoch = (unsigned long long)(ts.tv_sec) * 1000 +
(unsigned long long)(ts.tv_nsec) / 1000000;
if (job_start_clock_id == log_alternate_epoch_clock_id)
{
td->job_start = td->alternate_epoch;
}
else
{
clock_gettime(job_start_clock_id, &ts);
td->job_start = (unsigned long long)(ts.tv_sec) * 1000 +
(unsigned long long)(ts.tv_nsec) / 1000000;
}
}
void fill_start_time(struct timespec *t)
{
memcpy(t, &genesis, sizeof(genesis));
}
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