goto ffz;
do {
- r = os_random_long(&td->random_state);
+ if (td->o.use_os_rand) {
+ r = os_random_long(&td->random_state);
+ *b = (lastb - 1) * (r / ((unsigned long long) OS_RAND_MAX + 1.0));
+ } else {
+ r = __rand(&td->__random_state);
+ *b = (lastb - 1) * (r / ((unsigned long long) FRAND_MAX + 1.0));
+ }
+
dprint(FD_RANDOM, "off rand %llu\n", r);
- *b = (lastb - 1) * (r / ((unsigned long long) OS_RAND_MAX + 1.0));
+
/*
* if we are not maintaining a random map, we are done.
if (!get_next_free_block(td, f, ddir, b))
goto ret;
- r = os_random_long(&td->random_state);
+ if (td->o.use_os_rand)
+ r = os_random_long(&td->random_state);
+ else
+ r = __rand(&td->__random_state);
} while (--loops);
/*
return __get_next_offset(td, io_u);
}
+static inline int io_u_fits(struct thread_data *td, struct io_u *io_u,
+ unsigned int buflen)
+{
+ struct fio_file *f = io_u->file;
+
+ return io_u->offset + buflen <= f->io_size + td->o.start_offset;
+}
+
static unsigned int __get_next_buflen(struct thread_data *td, struct io_u *io_u)
{
const int ddir = io_u->ddir;
unsigned int uninitialized_var(buflen);
unsigned int minbs, maxbs;
- long r;
+ unsigned long r, rand_max;
assert(ddir_rw(ddir));
maxbs = td->o.max_bs[ddir];
if (minbs == maxbs)
- buflen = minbs;
- else {
- r = os_random_long(&td->bsrange_state);
+ return minbs;
+
+ if (td->o.use_os_rand)
+ rand_max = OS_RAND_MAX;
+ else
+ rand_max = FRAND_MAX;
+
+ do {
+ if (td->o.use_os_rand)
+ r = os_random_long(&td->bsrange_state);
+ else
+ r = __rand(&td->__bsrange_state);
+
if (!td->o.bssplit_nr[ddir]) {
buflen = 1 + (unsigned int) ((double) maxbs *
- (r / (OS_RAND_MAX + 1.0)));
+ (r / (rand_max + 1.0)));
if (buflen < minbs)
buflen = minbs;
} else {
buflen = bsp->bs;
perc += bsp->perc;
- if (r <= ((OS_RAND_MAX / 100L) * perc))
+ if ((r <= ((rand_max / 100L) * perc)) &&
+ io_u_fits(td, io_u, buflen))
break;
}
}
+
if (!td->o.bs_unaligned && is_power_of_2(minbs))
buflen = (buflen + minbs - 1) & ~(minbs - 1);
- }
- if (io_u->offset + buflen > io_u->file->real_file_size) {
- dprint(FD_IO, "lower buflen %u -> %u (ddir=%d)\n", buflen,
- minbs, ddir);
- buflen = minbs;
- }
+ } while (!io_u_fits(td, io_u, buflen));
return buflen;
}
static inline enum fio_ddir get_rand_ddir(struct thread_data *td)
{
unsigned int v;
- long r;
+ unsigned long r;
+
+ if (td->o.use_os_rand) {
+ r = os_random_long(&td->rwmix_state);
+ v = 1 + (int) (100.0 * (r / (OS_RAND_MAX + 1.0)));
+ } else {
+ r = __rand(&td->__rwmix_state);
+ v = 1 + (int) (100.0 * (r / (FRAND_MAX + 1.0)));
+ }
- r = os_random_long(&td->rwmix_state);
- v = 1 + (int) (100.0 * (r / (OS_RAND_MAX + 1.0)));
if (v <= td->o.rwmix[DDIR_READ])
return DDIR_READ;
int fno;
do {
- long r = os_random_long(&td->next_file_state);
int opened = 0;
+ unsigned long r;
+
+ if (td->o.use_os_rand) {
+ r = os_random_long(&td->next_file_state);
+ fno = (unsigned int) ((double) td->o.nr_files
+ * (r / (OS_RAND_MAX + 1.0)));
+ } else {
+ r = __rand(&td->__next_file_state);
+ fno = (unsigned int) ((double) td->o.nr_files
+ * (r / (FRAND_MAX + 1.0)));
+ }
- fno = (unsigned int) ((double) td->o.nr_files
- * (r / (OS_RAND_MAX + 1.0)));
f = td->files[fno];
if (fio_file_done(f))
continue;