int sys_poll_intr(struct pollfd *fds, int num_fds, int timeout)
{
int orig_timeout = timeout;
struct timespec start;
int ret;
clock_gettime_mono(&start);
while (true) {
struct timespec now;
int64_t elapsed;
ret = poll(fds, num_fds, timeout);
if (ret != -1) {
break;
}
if (errno != EINTR) {
break;
}
clock_gettime_mono(&now);
elapsed = nsec_time_diff(&now, &start);
timeout = (orig_timeout - elapsed) / 1000000;
};
return ret;
}
static void asys_fsync_do(void *private_data)
{
struct asys_job *job = (struct asys_job *)private_data;
struct asys_fsync_args *args = &job->args.fsync_args;
clock_gettime_mono(&job->start_time);
job->ret = fsync(args->fildes);
clock_gettime_mono(&job->end_time);
if (job->ret == -1) {
job->err = errno;
}
}
static void asys_pread_do(void *private_data)
{
struct asys_job *job = (struct asys_job *)private_data;
struct asys_pread_args *args = &job->args.pread_args;
clock_gettime_mono(&job->start_time);
job->ret = pread(args->fildes, args->buf, args->nbyte, args->offset);
clock_gettime_mono(&job->end_time);
if (job->ret == -1) {
job->err = errno;
}
}
static void stopwatch_stop(struct stopwatch *watch,
long long bytes_read)
{
double elapsed, rate;
if (clock_gettime_mono(&watch->stop)) {
int err = errno;
fprintf(stderr, "clock_gettime(CLOCK_MONOTONIC) failed with "
"error %d (%s)\n", err, strerror(err));
goto done;
}
elapsed = timespec_to_double(&watch->stop) -
timespec_to_double(&watch->start);
rate = (bytes_read / elapsed) / (1024 * 1024 * 1024);
printf("stopwatch: took %.5g seconds to read %lld bytes, "
"for %.5g GB/s\n", elapsed, bytes_read, rate);
printf("stopwatch: %.5g seconds\n", elapsed);
done:
free(watch);
}
static struct stopwatch *stopwatch_create(void)
{
struct stopwatch *watch;
watch = calloc(1, sizeof(struct stopwatch));
if (!watch) {
fprintf(stderr, "failed to allocate memory for stopwatch\n");
goto error;
}
if (clock_gettime_mono(&watch->start)) {
int err = errno;
fprintf(stderr, "clock_gettime(CLOCK_MONOTONIC) failed with "
"error %d (%s)\n", err, strerror(err));
goto error;
}
return watch;
error:
free(watch);
return NULL;
}
