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Thu, 4 Feb 2021 16:51:13 +0000 From: Raslan Darawsheh To: Slava Ovsiienko , "dev@dpdk.org" CC: Matan Azrad , Ori Kam , NBU-Contact-Thomas Monjalon , "stable@dpdk.org" Thread-Topic: [PATCH] net/mlx5: fix Tx queue size created with DevX Thread-Index: AQHW+u3lVWyDH+Zu9UO1uoRwkVzKNapINdZw Date: Thu, 4 Feb 2021 16:51:12 +0000 Message-ID: References: <20210204120409.1194-1-viacheslavo@nvidia.com> In-Reply-To: <20210204120409.1194-1-viacheslavo@nvidia.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: nvidia.com; dkim=none (message not signed) header.d=none;nvidia.com; dmarc=none action=none header.from=nvidia.com; x-originating-ip: [188.161.230.58] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 04ca03ca-7f00-49d4-b7aa-08d8c92d14ab x-ms-traffictypediagnostic: DM5PR12MB1322: x-ld-processed: 43083d15-7273-40c1-b7db-39efd9ccc17a,ExtAddr x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-header: ProcessedBy-CMR-outbound x-ms-oob-tlc-oobclassifiers: OLM:8882; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM6PR12MB2748.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 04ca03ca-7f00-49d4-b7aa-08d8c92d14ab X-MS-Exchange-CrossTenant-originalarrivaltime: 04 Feb 2021 16:51:12.9365 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: lCwRlu5lSABqCUuV9u3LF7AfihRcYMGVBOiiZ6cTfRg28G8Mk8YtonVyvUdSYiWIFocDtNwW2DtaM+WAvfjL+A== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR12MB1322 X-OriginatorOrg: Nvidia.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1612457478; bh=phxJJ4odVDkEydpqyBMUS2ofnBmyzpJZ38q2A9esg0o=; h=X-PGP-Universal:ARC-Seal:ARC-Message-Signature: ARC-Authentication-Results:From:To:CC:Subject:Thread-Topic: Thread-Index:Date:Message-ID:References:In-Reply-To: Accept-Language:Content-Language:X-MS-Has-Attach: X-MS-TNEF-Correlator:authentication-results:x-originating-ip: x-ms-publictraffictype:x-ms-office365-filtering-correlation-id: x-ms-traffictypediagnostic:x-ld-processed: x-ms-exchange-transport-forked:x-microsoft-antispam-prvs:x-header: x-ms-oob-tlc-oobclassifiers:x-ms-exchange-senderadcheck: x-microsoft-antispam:x-microsoft-antispam-message-info: x-forefront-antispam-report:x-ms-exchange-antispam-messagedata: Content-Type:Content-Transfer-Encoding:MIME-Version: X-MS-Exchange-CrossTenant-AuthAs: X-MS-Exchange-CrossTenant-AuthSource: X-MS-Exchange-CrossTenant-Network-Message-Id: X-MS-Exchange-CrossTenant-originalarrivaltime: X-MS-Exchange-CrossTenant-fromentityheader: X-MS-Exchange-CrossTenant-id:X-MS-Exchange-CrossTenant-mailboxtype: X-MS-Exchange-CrossTenant-userprincipalname: X-MS-Exchange-Transport-CrossTenantHeadersStamped:X-OriginatorOrg; b=X/GN+FepzWmCqDjQMflhMmGae3LD5ICY3oZvn1bMIZIsNPQdpxEhUjwSc/qG/s/LN X6tRr9bPR5mDkmKb1rFfB8br3+Pqb0TgvZ05l4LHy3p0nhcfnyFZSEEtjjVe0FhC8C n+5skE3zMFKSwrrllIbLiva3hP1pSOqt/IQbIPbyv2SwQ+60FKluf174abR+pdnrVf M6lPc/7Xz+0Nua84kYLlod6yWqiw0ObuiWKG86Qdygrzadq7guXnkNZJ3F3ToI8riJ ior7UquMiIV5GJ46mdxnGRg895BAEOfPLBTDQm4fENCfNr+mgpWRQL/u8tv4TGb3Gg YCuXUmnQGxSUQ== Subject: Re: [dpdk-stable] [PATCH] net/mlx5: fix Tx queue size created with DevX X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org Sender: "stable" Hi, > -----Original Message----- > From: Viacheslav Ovsiienko > Sent: Thursday, February 4, 2021 2:04 PM > To: dev@dpdk.org > Cc: Raslan Darawsheh ; Matan Azrad > ; Ori Kam ; NBU-Contact-Thomas > Monjalon ; stable@dpdk.org > Subject: [PATCH] net/mlx5: fix Tx queue size created with DevX >=20 > The number of descriptors specified for queue creation > implies the queue should be able to contain the specified > amount of packets being sent. Typically one packet takes > one queue descriptor (WQE) to be handled. If there is inline > data option enabled one packet might require more WQEs to > embrace the inline data and the overall queue size (the > number of queue descriptors) should be adjusted accordingly. >=20 > In mlx5 PMD the queues can be created either via Verbs, using > the rdma-core library or via DevX as direct kernel/firmware call. > The rdma-core does queue size adjustment internally, depending on > TSO and inline setting. The DevX approach missed this point. > This caused the queue size discrepancy and performance variations. >=20 > The patch adjusts the Tx queue size for the DexV approach > in the same as it is done in rdma-core implementation. >=20 > Fixes: 86d259cec852 ("net/mlx5: separate Tx queue object creations") > Cc: stable@dpdk.org >=20 > Signed-off-by: Viacheslav Ovsiienko Patch applied to next-net-mlx, Kindest regards, Raslan Darawsheh