patches for DPDK stable branches
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From: "Min Hu (Connor)" <humin29@huawei.com>
To: <dev@dpdk.org>
Cc: Huisong Li <lihuisong@huawei.com>, <stable@dpdk.org>,
	Min Hu <humin29@huawei.com>,
	Yisen Zhuang <yisen.zhuang@huawei.com>,
	Lijun Ou <oulijun@huawei.com>,
	Chengwen Feng <fengchengwen@huawei.com>
Subject: [PATCH v2 3/7] net/hns3: fix pseudo-sharing between threads
Date: Thu, 5 May 2022 20:27:03 +0800
Message-ID: <20220505122707.61182-4-humin29@huawei.com> (raw)
In-Reply-To: <20220505122707.61182-1-humin29@huawei.com>

From: Huisong Li <lihuisong@huawei.com>

Some fields in the end of 'struct hns3_rx_queue' and 'struct hns3_tx_queue'
are not accessed in the I/O path. But these fields may be accessed in other
threads, which may lead to the problem of cache pseudo-sharing of IO
threads. This patch add a cacheline alignment to avoid it.

Fixes: 9261fd3caf1f ("net/hns3: improve IO path data cache usage")
Cc: stable@dpdk.org

Signed-off-by: Huisong Li <lihuisong@huawei.com>
Signed-off-by: Min Hu (Connor) <humin29@huawei.com>
---
 drivers/net/hns3/hns3_rxtx.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/net/hns3/hns3_rxtx.h b/drivers/net/hns3/hns3_rxtx.h
index a000318357..62efc854e4 100644
--- a/drivers/net/hns3/hns3_rxtx.h
+++ b/drivers/net/hns3/hns3_rxtx.h
@@ -348,7 +348,7 @@ struct hns3_rx_queue {
 	 * The following fields are not accessed in the I/O path, so they are
 	 * placed at the end.
 	 */
-	void *io_base;
+	void *io_base __rte_cache_aligned;
 	struct hns3_adapter *hns;
 	uint64_t rx_ring_phys_addr; /* RX ring DMA address */
 	const struct rte_memzone *mz;
@@ -521,7 +521,7 @@ struct hns3_tx_queue {
 	 * The following fields are not accessed in the I/O path, so they are
 	 * placed at the end.
 	 */
-	void *io_base;
+	void *io_base __rte_cache_aligned;
 	struct hns3_adapter *hns;
 	uint64_t tx_ring_phys_addr; /* TX ring DMA address */
 	const struct rte_memzone *mz;
-- 
2.33.0


  parent reply	other threads:[~2022-05-05 12:28 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <20220406092240.52900-1-humin29@huawei.com>
     [not found] ` <20220505122707.61182-1-humin29@huawei.com>
2022-05-05 12:27   ` [PATCH v2 1/7] net/hns3: fix order of clearing imissed register in PF Min Hu (Connor)
2022-05-05 12:27   ` [PATCH v2 2/7] net/hns3: fix MAC and queues HW statistics overflow Min Hu (Connor)
2022-05-05 12:27   ` Min Hu (Connor) [this message]
2022-05-05 12:27   ` [PATCH v2 4/7] net/hns3: fix more mbufs are freed when Tx done cleanup Min Hu (Connor)
2022-05-05 12:27   ` [PATCH v2 5/7] net/hns3: fix RSS disable Min Hu (Connor)
2022-05-05 12:27   ` [PATCH v2 6/7] net/hns3: fix undo rollback when update RSS hash Min Hu (Connor)
2022-05-05 12:27   ` [PATCH v2 7/7] net/hns3: remove redundant RSS tuple field Min Hu (Connor)

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