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nvme/perf: move rand_r seed to ns_entry_

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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
ns_entry rather than making it thread local.

Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: Icc4a8b7bdbc9cd35525f2d35c9ada8e3ec0ba76c
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/7791
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 2021-05-07 00:02:40 +00:00 committed by Tomasz Zawadzki
parent bef22f45e7
commit 6ee7dd5375
1 changed files with 3 additions and 4 deletions
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7
examples/nvme/perf/perf.c
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@ -105,6 +105,7 @@ struct ns_entry {
uint32_t block_size;
uint32_t md_size;
bool md_interleave;
unsigned int seed;
bool pi_loc;
enum spdk_nvme_pi_type pi_type;
uint32_t io_flags;
@ -1341,8 +1342,6 @@ register_ctrlr(struct spdk_nvme_ctrlr *ctrlr, struct trid_entry *trid_entry)
}
}
static __thread unsigned int seed = 0;
static inline void
submit_single_io(struct perf_task *task)
{
@ -1352,7 +1351,7 @@ submit_single_io(struct perf_task *task)
struct ns_entry *entry = ns_ctx->entry;
if (g_is_random) {
offset_in_ios = rand_r(&seed) % entry->size_in_ios;
offset_in_ios = rand_r(&entry->seed) % entry->size_in_ios;
} else {
offset_in_ios = ns_ctx->offset_in_ios++;
if (ns_ctx->offset_in_ios == entry->size_in_ios) {
@ -1363,7 +1362,7 @@ submit_single_io(struct perf_task *task)
task->submit_tsc = spdk_get_ticks();
if ((g_rw_percentage == 100) ||
(g_rw_percentage != 0 && ((rand_r(&seed) % 100) < g_rw_percentage))) {
(g_rw_percentage != 0 && ((rand_r(&entry->seed) % 100) < g_rw_percentage))) {
task->is_read = true;
} else {
task->is_read = false;