o->verify_backlog = le64_to_cpu(top->verify_backlog);
o->start_delay = le64_to_cpu(top->start_delay);
+ o->start_delay_high = le64_to_cpu(top->start_delay_high);
o->timeout = le64_to_cpu(top->timeout);
o->ramp_time = le64_to_cpu(top->ramp_time);
o->zone_range = le64_to_cpu(top->zone_range);
top->size = __cpu_to_le64(o->size);
top->verify_backlog = __cpu_to_le64(o->verify_backlog);
top->start_delay = __cpu_to_le64(o->start_delay);
+ top->start_delay_high = __cpu_to_le64(o->start_delay_high);
top->timeout = __cpu_to_le64(o->timeout);
top->ramp_time = __cpu_to_le64(o->ramp_time);
top->zone_range = __cpu_to_le64(o->zone_range);
allowed. For \fBbind\fR and \fBinterleave\fR, \fBnodelist\fR allows
comma delimited list of numbers, A-B ranges, or 'all'.
.TP
-.BI startdelay \fR=\fPint
-Delay start of job for the specified number of seconds.
+.BI startdelay \fR=\fPirange
+Delay start of job for the specified number of seconds. Supports all time
+suffixes to allow specification of hours, minutes, seconds and
+milliseconds - seconds are the default if a unit is ommited.
+Can be given as a range which causes each thread to choose randomly out of the
+range.
.TP
.BI runtime \fR=\fPint
Terminate processing after the specified number of seconds.
FIO_RAND_SEQ_RAND_READ_OFF,
FIO_RAND_SEQ_RAND_WRITE_OFF,
FIO_RAND_SEQ_RAND_TRIM_OFF,
+ FIO_RAND_START_DELAY,
FIO_RAND_NR_OFFS,
};
os_random_state_t trim_state;
struct frand_state __trim_state;
};
+ union {
+ os_random_state_t delay_state;
+ struct frand_state __delay_state;
+ };
struct frand_state buf_state;
o->min_bs[DDIR_READ] == o->min_bs[DDIR_TRIM];
}
+
+static unsigned long long get_rand_start_delay(struct thread_data *td)
+{
+ unsigned long long delayrange;
+ unsigned long r;
+
+ delayrange = td->o.start_delay_high - td->o.start_delay;
+
+ if (td->o.use_os_rand) {
+ r = os_random_long(&td->delay_state);
+ delayrange = (unsigned long long) ((double) delayrange * (r / (OS_RAND_MAX + 1.0)));
+ } else {
+ r = __rand(&td->__delay_state);
+ delayrange = (unsigned long long) ((double) delayrange * (r / (FRAND_MAX + 1.0)));
+ }
+
+ delayrange += td->o.start_delay;
+ return delayrange;
+}
+
/*
* Lazy way of fixing up options that depend on each other. We could also
* define option callback handlers, but this is easier.
if (!o->file_size_high)
o->file_size_high = o->file_size_low;
+ if (o->start_delay_high)
+ o->start_delay = get_rand_start_delay(td);
+
if (o->norandommap && o->verify != VERIFY_NONE
&& !fixed_block_size(o)) {
log_err("fio: norandommap given for variable block sizes, "
os_random_seed(td->rand_seeds[FIO_RAND_FILE_SIZE_OFF], &td->file_size_state);
os_random_seed(td->rand_seeds[FIO_RAND_TRIM_OFF], &td->trim_state);
+ os_random_seed(td->rand_seeds[FIO_RAND_START_DELAY], &td->delay_state);
if (!td_random(td))
return;
init_rand_seed(&td->__file_size_state, td->rand_seeds[FIO_RAND_FILE_SIZE_OFF]);
init_rand_seed(&td->__trim_state, td->rand_seeds[FIO_RAND_TRIM_OFF]);
+ init_rand_seed(&td->__delay_state, td->rand_seeds[FIO_RAND_START_DELAY]);
if (!td_random(td))
return;
.lname = "Start delay",
.type = FIO_OPT_STR_VAL_TIME,
.off1 = td_var_offset(start_delay),
+ .off2 = td_var_offset(start_delay_high),
.help = "Only start job when this period has passed",
.def = "0",
.category = FIO_OPT_C_GENERAL,
unsigned int fdatasync_blocks;
unsigned int barrier_blocks;
unsigned long long start_delay;
+ unsigned long long start_delay_high;
unsigned long long timeout;
unsigned long long ramp_time;
unsigned int overwrite;
uint32_t fdatasync_blocks;
uint32_t barrier_blocks;
uint64_t start_delay;
+ uint64_t start_delay_high;
uint64_t timeout;
uint64_t ramp_time;
uint32_t overwrite;