};
static int __get_next_rand_offset(struct thread_data *td, struct fio_file *f,
- enum fio_ddir ddir, uint64_t *b)
+ enum fio_ddir ddir, uint64_t *b,
+ uint64_t lastb)
{
uint64_t r;
if (td->o.random_generator == FIO_RAND_GEN_TAUSWORTHE ||
td->o.random_generator == FIO_RAND_GEN_TAUSWORTHE64) {
- uint64_t frand_max, lastb;
- lastb = last_block(td, f, ddir);
- if (!lastb)
- return 1;
-
- frand_max = rand_max(&td->random_state);
r = __rand(&td->random_state);
dprint(FD_RANDOM, "off rand %llu\n", (unsigned long long) r);
- *b = lastb * (r / ((uint64_t) frand_max + 1.0));
+ *b = lastb * (r / (rand_max(&td->random_state) + 1.0));
} else {
uint64_t off = 0;
return 0;
}
+static int __get_next_rand_offset_zoned(struct thread_data *td,
+ struct fio_file *f, enum fio_ddir ddir,
+ uint64_t *b)
+{
+ unsigned int v, send, stotal;
+ uint64_t offset, lastb;
+ static int warned;
+ struct zone_split_index *zsi;
+
+ lastb = last_block(td, f, ddir);
+ if (!lastb)
+ return 1;
+
+ if (!td->o.zone_split_nr[ddir]) {
+bail:
+ return __get_next_rand_offset(td, f, ddir, b, lastb);
+ }
+
+ /*
+ * Generate a value, v, between 1 and 100, both inclusive
+ */
+ v = rand_between(&td->zone_state, 1, 100);
+
+ zsi = &td->zone_state_index[ddir][v - 1];
+ stotal = zsi->size_perc_prev;
+ send = zsi->size_perc;
+
+ /*
+ * Should never happen
+ */
+ if (send == -1U) {
+ if (!warned) {
+ log_err("fio: bug in zoned generation\n");
+ warned = 1;
+ }
+ goto bail;
+ }
+
+ /*
+ * 'send' is some percentage below or equal to 100 that
+ * marks the end of the current IO range. 'stotal' marks
+ * the start, in percent.
+ */
+ if (stotal)
+ offset = stotal * lastb / 100ULL;
+ else
+ offset = 0;
+
+ lastb = lastb * (send - stotal) / 100ULL;
+
+ /*
+ * Generate index from 0..send-of-lastb
+ */
+ if (__get_next_rand_offset(td, f, ddir, b, lastb) == 1)
+ return 1;
+
+ /*
+ * Add our start offset, if any
+ */
+ if (offset)
+ *b += offset;
+
+ return 0;
+}
static int flist_cmp(void *data, struct flist_head *a, struct flist_head *b)
{
static int get_off_from_method(struct thread_data *td, struct fio_file *f,
enum fio_ddir ddir, uint64_t *b)
{
- if (td->o.random_distribution == FIO_RAND_DIST_RANDOM)
- return __get_next_rand_offset(td, f, ddir, b);
- else if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
+ if (td->o.random_distribution == FIO_RAND_DIST_RANDOM) {
+ uint64_t lastb;
+
+ lastb = last_block(td, f, ddir);
+ if (!lastb)
+ return 1;
+
+ return __get_next_rand_offset(td, f, ddir, b, lastb);
+ } else if (td->o.random_distribution == FIO_RAND_DIST_ZIPF)
return __get_next_rand_offset_zipf(td, f, ddir, b);
else if (td->o.random_distribution == FIO_RAND_DIST_PARETO)
return __get_next_rand_offset_pareto(td, f, ddir, b);
else if (td->o.random_distribution == FIO_RAND_DIST_GAUSS)
return __get_next_rand_offset_gauss(td, f, ddir, b);
+ else if (td->o.random_distribution == FIO_RAND_DIST_ZONED)
+ return __get_next_rand_offset_zoned(td, f, ddir, b);
log_err("fio: unknown random distribution: %d\n", td->o.random_distribution);
return 1;
static bool should_do_random(struct thread_data *td, enum fio_ddir ddir)
{
- uint64_t frand_max;
unsigned int v;
- unsigned long r;
if (td->o.perc_rand[ddir] == 100)
return true;
- frand_max = rand_max(&td->seq_rand_state[ddir]);
- r = __rand(&td->seq_rand_state[ddir]);
- v = 1 + (int) (100.0 * (r / (frand_max + 1.0)));
+ v = rand_between(&td->seq_rand_state[ddir], 1, 100);
return v <= td->o.perc_rand[ddir];
}
static inline enum fio_ddir get_rand_ddir(struct thread_data *td)
{
- uint64_t frand_max = rand_max(&td->rwmix_state);
unsigned int v;
- unsigned long r;
- r = __rand(&td->rwmix_state);
- v = 1 + (int) (100.0 * (r / (frand_max + 1.0)));
+ v = rand_between(&td->rwmix_state, 1, 100);
if (v <= td->o.rwmix[DDIR_READ])
return DDIR_READ;
*/
static struct frand_state *get_buf_state(struct thread_data *td)
{
- uint64_t frand_max;
unsigned int v;
- unsigned long r;
if (!td->o.dedupe_percentage)
return &td->buf_state;
return &td->buf_state;
}
- frand_max = rand_max(&td->dedupe_state);
- r = __rand(&td->dedupe_state);
- v = 1 + (int) (100.0 * (r / (frand_max + 1.0)));
+ v = rand_between(&td->dedupe_state, 1, 100);
if (v <= td->o.dedupe_percentage)
return &td->buf_state_prev;