[dpdk-dev] [RFC PATCH v1 3/6] app/eventdev: replace wmb with thread fence for perf test

[Feifei Wang]

Simply replace rte_smp barrier with atomic threand fence.

Signed-off-by: Phil Yang <phil.yang at arm.com>
Signed-off-by: Feifei Wang <feifei.wang2 at arm.com>
Reviewed-by: Honnappa Nagarahalli <Honnappa.Nagarahalli at arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang at arm.com>
---
 app/test-eventdev/test_perf_common.h | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/app/test-eventdev/test_perf_common.h b/app/test-eventdev/test_perf_common.h
index e7233e5a5..9785dc3e2 100644
--- a/app/test-eventdev/test_perf_common.h
+++ b/app/test-eventdev/test_perf_common.h
@@ -98,11 +98,11 @@ perf_process_last_stage(struct rte_mempool *const pool,
 {
 	bufs[count++] = ev->event_ptr;
 
-	/* wmb here ensures event_prt is stored before
-	 * updating the number of processed packets
-	 * for worker lcores
+	/* release fence here ensures event_prt is
+	 * stored before updating the number of
+	 * processed packets for worker lcores
 	 */
-	rte_smp_wmb();
+	rte_atomic_thread_fence(__ATOMIC_RELEASE);
 	w->processed_pkts++;
 
 	if (unlikely(count == buf_sz)) {
@@ -122,11 +122,11 @@ perf_process_last_stage_latency(struct rte_mempool *const pool,
 
 	bufs[count++] = ev->event_ptr;
 
-	/* wmb here ensures event_prt is stored before
-	 * updating the number of processed packets
-	 * for worker lcores
+	/* release fence here ensures event_prt is
+	 * stored before updating the number of
+	 * processed packets for worker lcores
 	 */
-	rte_smp_wmb();
+	rte_atomic_thread_fence(__ATOMIC_RELEASE);
 	w->processed_pkts++;
 
 	if (unlikely(count == buf_sz)) {
-- 
2.17.1