Add support for randomness of any IO direction
sequential_random used to be applied to all of the IO
directions, with no possibility of having different settings
for reads, writes, and trims. Now it supports setting each of
them individually.
By default, if you do:
sequential_random=50
it will still apply to all three. If you do:
sequential_random=10,90,80
you would get reads 10% random, writes 90% random, and trims
80% random.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/init.c b/init.c
index d808eb6..b0a7c35 100644
--- a/init.c
+++ b/init.c
@@ -413,7 +413,7 @@
static int fixup_options(struct thread_data *td)
{
struct thread_options *o = &td->o;
- int ret = 0;
+ int i, ret = 0;
#ifndef FIO_HAVE_PSHARED_MUTEX
if (!o->use_thread) {
@@ -701,7 +701,10 @@
td->rand_seeds[FIO_RAND_BLOCK_OFF] = FIO_RANDSEED * td->thread_number;
os_random_seed(td->rand_seeds[FIO_RAND_BLOCK_OFF], &td->random_state);
- os_random_seed(td->rand_seeds[FIO_RAND_SEQ_RAND_OFF], &td->seq_rand_state);
+
+ os_random_seed(td->rand_seeds[FIO_RAND_SEQ_RAND_READ_OFF], &td->seq_rand_state[DDIR_READ]);
+ os_random_seed(td->rand_seeds[FIO_RAND_SEQ_RAND_WRITE_OFF], &td->seq_rand_state[DDIR_WRITE]);
+ os_random_seed(td->rand_seeds[FIO_RAND_SEQ_RAND_TRIM_OFF], &td->seq_rand_state[DDIR_TRIM]);
}
static void td_fill_rand_seeds_internal(struct thread_data *td)
@@ -723,7 +726,9 @@
td->rand_seeds[FIO_RAND_BLOCK_OFF] = FIO_RANDSEED * td->thread_number;
init_rand_seed(&td->__random_state, td->rand_seeds[FIO_RAND_BLOCK_OFF]);
- init_rand_seed(&td->__seq_rand_state, td->rand_seeds[FIO_RAND_SEQ_RAND_OFF]);
+ init_rand_seed(&td->__seq_rand_state[DDIR_READ], td->rand_seeds[FIO_RAND_SEQ_RAND_READ_OFF]);
+ init_rand_seed(&td->__seq_rand_state[DDIR_WRITE], td->rand_seeds[FIO_RAND_SEQ_RAND_WRITE_OFF]);
+ init_rand_seed(&td->__seq_rand_state[DDIR_TRIM], td->rand_seeds[FIO_RAND_SEQ_RAND_TRIM_OFF]);
}
void td_fill_rand_seeds(struct thread_data *td)