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bdevperf: store the rand_r seed in the bdevperf_job

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This eliminates the thread-local seed variable.  But
we're also adding zipf distributions in an upcoming
patch, and we'll want to store that context in the
job rather than making it thread local.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: If8079682e7d3da8f989ee6b880edc8d3fcb4fdd8
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/7789
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Community-CI: Mellanox Build Bot
This commit is contained in:
Jim Harris 2021-05-06 23:18:58 +00:00 committed by Tomasz Zawadzki
parent e6b7e58574
commit 760452eefe
1 changed files with 3 additions and 4 deletions
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7
test/bdev/bdevperf/bdevperf.c
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@ -118,6 +118,7 @@ struct bdevperf_job {
bool flush;
bool abort;
int queue_depth;
unsigned int seed;
uint64_t io_completed;
uint64_t io_failed;
@ -826,15 +827,13 @@ bdevperf_job_get_task(struct bdevperf_job *job)
return task;
}
static __thread unsigned int seed = 0;
static void
bdevperf_submit_single(struct bdevperf_job *job, struct bdevperf_task *task)
{
uint64_t offset_in_ios;
if (job->is_random) {
offset_in_ios = rand_r(&seed) % job->size_in_ios;
offset_in_ios = rand_r(&job->seed) % job->size_in_ios;
} else {
offset_in_ios = job->offset_in_ios++;
if (job->offset_in_ios == job->size_in_ios) {
@ -884,7 +883,7 @@ bdevperf_submit_single(struct bdevperf_job *job, struct bdevperf_task *task)
} else if (job->write_zeroes) {
task->io_type = SPDK_BDEV_IO_TYPE_WRITE_ZEROES;
} else if ((job->rw_percentage == 100) ||
(job->rw_percentage != 0 && ((rand_r(&seed) % 100) < job->rw_percentage))) {
(job->rw_percentage != 0 && ((rand_r(&job->seed) % 100) < job->rw_percentage))) {
task->io_type = SPDK_BDEV_IO_TYPE_READ;
} else {
if (g_zcopy) {