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From: Feifei Wang <feifei.wang2@arm.com>
To: Jerin Jacob <jerinj@marvell.com>,
	Harry van Haaren <harry.van.haaren@intel.com>,
	Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
Cc: dev@dpdk.org, nd@arm.com, Honnappa.Nagarahalli@arm.com,
	Feifei Wang <feifei.wang2@arm.com>,
	pbhagavatula@marvell.com, stable@dpdk.org,
	Phil Yang <phil.yang@arm.com>
Subject: [dpdk-dev] [RFC PATCH v1 4/6] app/eventdev: add release barriers for pipeline test
Date: Tue, 22 Dec 2020 13:07:25 +0800
Message-ID: <20201222050728.41000-5-feifei.wang2@arm.com> (raw)
In-Reply-To: <20201222050728.41000-1-feifei.wang2@arm.com>

Add release barriers before updating the processed packets for worker
lcores to ensure the worker lcore has really finished data processing
and then it can update the processed packets number.

Fixes: 314bcf58ca8f ("app/eventdev: add pipeline queue worker functions")
Cc: pbhagavatula@marvell.com
Cc: stable@dpdk.org

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>
---
 app/test-eventdev/test_pipeline_queue.c | 64 +++++++++++++++++++++----
 1 file changed, 56 insertions(+), 8 deletions(-)

diff --git a/app/test-eventdev/test_pipeline_queue.c b/app/test-eventdev/test_pipeline_queue.c
index 7bebac34f..0c0ec0ceb 100644
--- a/app/test-eventdev/test_pipeline_queue.c
+++ b/app/test-eventdev/test_pipeline_queue.c
@@ -30,7 +30,13 @@ pipeline_queue_worker_single_stage_tx(void *arg)
 
 		if (ev.sched_type == RTE_SCHED_TYPE_ATOMIC) {
 			pipeline_event_tx(dev, port, &ev);
-			w->processed_pkts++;
+
+			/* release barrier here ensures stored operation
+			 * of the event completes before the number of
+			 * processed pkts is visible to the main core
+			 */
+			__atomic_fetch_add(&(w->processed_pkts), 1,
+					__ATOMIC_RELEASE);
 		} else {
 			ev.queue_id++;
 			pipeline_fwd_event(&ev, RTE_SCHED_TYPE_ATOMIC);
@@ -59,7 +65,13 @@ pipeline_queue_worker_single_stage_fwd(void *arg)
 		rte_event_eth_tx_adapter_txq_set(ev.mbuf, 0);
 		pipeline_fwd_event(&ev, RTE_SCHED_TYPE_ATOMIC);
 		pipeline_event_enqueue(dev, port, &ev);
-		w->processed_pkts++;
+
+		/* release barrier here ensures stored operation
+		 * of the event completes before the number of
+		 * processed pkts is visible to the main core
+		 */
+		__atomic_fetch_add(&(w->processed_pkts), 1,
+				__ATOMIC_RELEASE);
 	}
 
 	return 0;
@@ -84,7 +96,13 @@ pipeline_queue_worker_single_stage_burst_tx(void *arg)
 			if (ev[i].sched_type == RTE_SCHED_TYPE_ATOMIC) {
 				pipeline_event_tx(dev, port, &ev[i]);
 				ev[i].op = RTE_EVENT_OP_RELEASE;
-				w->processed_pkts++;
+
+				/* release barrier here ensures stored operation
+				 * of the event completes before the number of
+				 * processed pkts is visible to the main core
+				 */
+				__atomic_fetch_add(&(w->processed_pkts), 1,
+						__ATOMIC_RELEASE);
 			} else {
 				ev[i].queue_id++;
 				pipeline_fwd_event(&ev[i],
@@ -121,7 +139,13 @@ pipeline_queue_worker_single_stage_burst_fwd(void *arg)
 		}
 
 		pipeline_event_enqueue_burst(dev, port, ev, nb_rx);
-		w->processed_pkts += nb_rx;
+
+		/* release barrier here ensures stored operation
+		 * of the event completes before the number of
+		 * processed pkts is visible to the main core
+		 */
+		__atomic_fetch_add(&(w->processed_pkts), nb_rx,
+				__ATOMIC_RELEASE);
 	}
 
 	return 0;
@@ -146,7 +170,13 @@ pipeline_queue_worker_multi_stage_tx(void *arg)
 
 		if (ev.queue_id == tx_queue[ev.mbuf->port]) {
 			pipeline_event_tx(dev, port, &ev);
-			w->processed_pkts++;
+
+			/* release barrier here ensures stored operation
+			 * of the event completes before the number of
+			 * processed pkts is visible to the main core
+			 */
+			__atomic_fetch_add(&(w->processed_pkts), 1,
+					__ATOMIC_RELEASE);
 			continue;
 		}
 
@@ -180,7 +210,13 @@ pipeline_queue_worker_multi_stage_fwd(void *arg)
 			ev.queue_id = tx_queue[ev.mbuf->port];
 			rte_event_eth_tx_adapter_txq_set(ev.mbuf, 0);
 			pipeline_fwd_event(&ev, RTE_SCHED_TYPE_ATOMIC);
-			w->processed_pkts++;
+
+			/* release barrier here ensures stored operation
+			 * of the event completes before the number of
+			 * processed pkts is visible to the main core
+			 */
+			__atomic_fetch_add(&(w->processed_pkts), 1,
+					__ATOMIC_RELEASE);
 		} else {
 			ev.queue_id++;
 			pipeline_fwd_event(&ev, sched_type_list[cq_id]);
@@ -214,7 +250,13 @@ pipeline_queue_worker_multi_stage_burst_tx(void *arg)
 			if (ev[i].queue_id == tx_queue[ev[i].mbuf->port]) {
 				pipeline_event_tx(dev, port, &ev[i]);
 				ev[i].op = RTE_EVENT_OP_RELEASE;
-				w->processed_pkts++;
+
+				/* release barrier here ensures stored operation
+				 * of the event completes before the number of
+				 * processed pkts is visible to the main core
+				 */
+				__atomic_fetch_add(&(w->processed_pkts), 1,
+						__ATOMIC_RELEASE);
 				continue;
 			}
 
@@ -254,7 +296,13 @@ pipeline_queue_worker_multi_stage_burst_fwd(void *arg)
 				rte_event_eth_tx_adapter_txq_set(ev[i].mbuf, 0);
 				pipeline_fwd_event(&ev[i],
 						RTE_SCHED_TYPE_ATOMIC);
-				w->processed_pkts++;
+
+				/* release barrier here ensures stored operation
+				 * of the event completes before the number of
+				 * processed pkts is visible to the main core
+				 */
+				__atomic_fetch_add(&(w->processed_pkts), 1,
+						__ATOMIC_RELEASE);
 			} else {
 				ev[i].queue_id++;
 				pipeline_fwd_event(&ev[i],
-- 
2.17.1


  parent reply	other threads:[~2020-12-22  5:09 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-22  5:07 [dpdk-dev] [RFC PATCH v1 0/6] refactor smp barriers in app/eventdev Feifei Wang
2020-12-22  5:07 ` [dpdk-dev] [RFC PATCH v1 1/6] app/eventdev: fix SMP barrier bugs for perf test Feifei Wang
2020-12-22  5:07 ` [dpdk-dev] [RFC PATCH v1 2/6] app/eventdev: remove unnecessary barriers " Feifei Wang
2020-12-22  5:07 ` [dpdk-dev] [RFC PATCH v1 3/6] app/eventdev: replace wmb with thread fence " Feifei Wang
2020-12-22  5:07 ` Feifei Wang [this message]
2020-12-22  5:07 ` [dpdk-dev] [RFC PATCH v1 5/6] app/eventdev: remove unnecessary barriers for pipeline test Feifei Wang
2020-12-22  5:07 ` [dpdk-dev] [RFC PATCH v1 6/6] app/eventdev: remove unnecessary barriers for order test Feifei Wang
  -- strict thread matches above, loose matches on Subject: below --
2020-12-22 10:33 [dpdk-dev] [RFC PATCH v1 4/6] app/eventdev: add release barriers for pipeline test Pavan Nikhilesh Bhagavatula
2021-01-05  7:39 ` Feifei Wang
2021-01-05  9:29   ` Pavan Nikhilesh Bhagavatula
2021-01-08  7:12     ` [dpdk-dev] 回复: " Feifei Wang
2021-01-08  9:12       ` [dpdk-dev] " Pavan Nikhilesh Bhagavatula
2021-01-08 10:44         ` [dpdk-dev] 回复: " Feifei Wang
2021-01-08 10:58           ` [dpdk-dev] " Pavan Nikhilesh Bhagavatula
2021-01-11  1:57             ` [dpdk-dev] 回复: " Feifei Wang
2021-01-12  8:29             ` [dpdk-dev] " Pavan Nikhilesh Bhagavatula
2021-01-14  6:07               ` [dpdk-dev] 回复: " Feifei Wang
2020-12-22  3:22 [dpdk-dev] [RFC PATCH v1 0/6] refactor smp barriers in app/eventdev Feifei Wang
2020-12-22  3:22 ` [dpdk-dev] [RFC PATCH v1 4/6] app/eventdev: add release barriers for pipeline test Feifei Wang

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