From: Pavan Nikhilesh Bhagavatula <pbhagavatula@marvell.com>
To: Feifei Wang <feifei.wang2@arm.com>,
Jerin Jacob Kollanukkaran <jerinj@marvell.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
"Honnappa.Nagarahalli@arm.com" <Honnappa.Nagarahalli@arm.com>,
"nd@arm.com" <nd@arm.com>, Phil Yang <phil.yang@arm.com>,
Ruifeng Wang <ruifeng.wang@arm.com>
Subject: Re: [dpdk-dev] [EXT] [PATCH v1 3/5] app/eventdev: replace wmb with thread fence for perf test
Date: Mon, 25 Jan 2021 17:50:01 +0000 [thread overview]
Message-ID: <CO6PR18MB38280E15717DF5FDF0DD5628DEBD9@CO6PR18MB3828.namprd18.prod.outlook.com> (raw)
In-Reply-To: <20210114070830.707550-4-feifei.wang2@arm.com>
>Simply replace rte_smp barrier with atomic threand fence.
>
>Signed-off-by: Phil Yang <phil.yang@arm.com>
>Signed-off-by: Feifei Wang <feifei.wang2@arm.com>
>Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
Acked-by: Pavan Nikhilesh <pbhagavatula@marvell.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)) {
>--
>2.25.1
next prev parent reply other threads:[~2021-01-25 17:50 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-14 7:08 [dpdk-dev] [PATCH v1 0/5] refactor smp barriers in app/eventdev Feifei Wang
2021-01-14 7:08 ` [dpdk-dev] [PATCH v1 1/5] app/eventdev: fix SMP barrier bugs for perf test Feifei Wang
2021-01-25 17:50 ` [dpdk-dev] [EXT] " Pavan Nikhilesh Bhagavatula
2021-01-14 7:08 ` [dpdk-dev] [PATCH v1 2/5] app/eventdev: remove unnecessary barriers " Feifei Wang
2021-01-25 17:48 ` [dpdk-dev] [EXT] " Pavan Nikhilesh Bhagavatula
2021-01-14 7:08 ` [dpdk-dev] [PATCH v1 3/5] app/eventdev: replace wmb with thread fence " Feifei Wang
2021-01-25 17:50 ` Pavan Nikhilesh Bhagavatula [this message]
2021-01-14 7:08 ` [dpdk-dev] [PATCH v1 4/5] app/eventdev: remove unnecessary barriers for pipeline test Feifei Wang
2021-01-25 17:50 ` [dpdk-dev] [EXT] " Pavan Nikhilesh Bhagavatula
2021-01-14 7:08 ` [dpdk-dev] [PATCH v1 5/5] app/eventdev: remove unnecessary barriers for order test Feifei Wang
2021-01-25 17:49 ` [dpdk-dev] [EXT] " Pavan Nikhilesh Bhagavatula
2021-01-26 15:56 ` Jerin Jacob
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