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From: Feifei Wang <feifei.wang2@arm.com>
To: Jerin Jacob <jerinj@marvell.com>
Cc: dev@dpdk.org, nd@arm.com, Feifei Wang <feifei.wang2@arm.com>
Subject: [dpdk-dev] [RFC PATCH v1 6/6] app/eventdev: remove unnecessary barriers for order test
Date: Tue, 22 Dec 2020 11:22:37 +0800
Message-ID: <20201222032237.36046-7-feifei.wang2@arm.com> (raw)
In-Reply-To: <20201222032237.36046-1-feifei.wang2@arm.com>

For the wmb in order_process_stage_1 and order_process_stage_invalid in
the order test, they can be removed. This is because when the test results
are wrong, the worker core writes 'true' to t->err. Then other worker
cores, producer cores and the main core will load the 'error' index and
stop testing. So, for the worker cores, no other storing operation needs
to be guaranteed after this when errors happen.

Signed-off-by: Feifei Wang <feifei.wang2@arm.com>
Reviewed-by: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>
Reviewed-by: Ruifeng Wang <ruifeng.wang@arm.com>
---
 app/test-eventdev/test_order_common.h | 2 --
 1 file changed, 2 deletions(-)

diff --git a/app/test-eventdev/test_order_common.h b/app/test-eventdev/test_order_common.h
index 5ef840493..cd9d6009e 100644
--- a/app/test-eventdev/test_order_common.h
+++ b/app/test-eventdev/test_order_common.h
@@ -104,7 +104,6 @@ order_process_stage_1(struct test_order *const t,
 			flow, *order_mbuf_seqn(t, ev->mbuf),
 			expected_flow_seq[flow]);
 		t->err = true;
-		rte_smp_wmb();
 	}
 	/*
 	 * Events from an atomic flow of an event queue can be scheduled only to
@@ -123,7 +122,6 @@ order_process_stage_invalid(struct test_order *const t,
 {
 	evt_err("invalid queue %d", ev->queue_id);
 	t->err = true;
-	rte_smp_wmb();
 }
 
 #define ORDER_WORKER_INIT\
-- 
2.17.1


  parent reply	other threads:[~2020-12-22  3:24 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
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 1/6] app/eventdev: fix SMP barrier bugs for perf test Feifei Wang
2020-12-22  3:22 ` [dpdk-dev] [RFC PATCH v1 2/6] app/eventdev: remove unnecessary barriers " Feifei Wang
2020-12-22  3:22 ` [dpdk-dev] [RFC PATCH v1 3/6] app/eventdev: replace wmb with thread fence " Feifei Wang
2020-12-22  3:22 ` [dpdk-dev] [RFC PATCH v1 4/6] app/eventdev: add release barriers for pipeline test Feifei Wang
2020-12-22  3:22 ` [dpdk-dev] [RFC PATCH v1 5/6] app/eventdev: remove unnecessary " Feifei Wang
2020-12-22  3:22 ` Feifei Wang [this message]
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 6/6] app/eventdev: remove unnecessary barriers for order test Feifei Wang

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