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Sun, 21 Feb 2021 08:14:12 +0000 From: Raslan Darawsheh To: Slava Ovsiienko , "dev@dpdk.org" CC: Matan Azrad , "stable@dpdk.org" Thread-Topic: [PATCH] net/mlx5: fix external buffer pool registration for Rx queue Thread-Index: AQHXAS8iZLxXVsfbs0O2hEsPWG/+capiUJrA Date: Sun, 21 Feb 2021 08:14:12 +0000 Message-ID: References: <20210212110630.2605-1-viacheslavo@nvidia.com> In-Reply-To: <20210212110630.2605-1-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: [188.161.229.248] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 43fb052a-6b9a-4f77-a794-08d8d640ac36 x-ms-traffictypediagnostic: DM6PR12MB4841: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-header: ProcessedBy-CMR-outbound x-ms-oob-tlc-oobclassifiers: OLM:8273; x-ms-exchange-senderadcheck: 1 x-microsoft-antispam: BCL:0; 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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: 43fb052a-6b9a-4f77-a794-08d8d640ac36 X-MS-Exchange-CrossTenant-originalarrivaltime: 21 Feb 2021 08:14:12.7439 (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: ntNEB3rZQpC1jKlBEEzy67GOWsWnOW5h/0m6g0aBNBF3tY1B2hu4YcgsVlb1U09OMsrUAPLDBkTzKoC9xBAazw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4841 X-OriginatorOrg: Nvidia.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1613895254; bh=LGuJ+Uxf7/tiJ5dwnyVpnrXSTpqOVKqmkSGxUQQ6n1E=; 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-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=bBh6KJ6ND1QEW3b66JknlU0AiuKI88qHDejm3JNKbOpcKkBiFy0TAuJvsHjO1el+X UgQMQFkNh16z48S7jC7c4DbGIaF1srPlWe8Z9bqhzc+IvFlQnzS+o+nyat+xwQ0+Ly JmdL1csOtHFe0ZLUfAtFWdZ9sNaTLwBbQsxtMyTD1UDh2Us+euD2r3zWS8rUnicA1F M6JXkgyjHQtiDozD4kZ0otHwALT3Yf/nZIVmWApb7ntBQ7wjTSBiPuyIsaX4G3CDFz ExkjcZG8lCIzUQhb84xx0RHg5/ttJa41V65Xr3ZaHDXUmWtdF/pgAM9KlIBpGVEuYa iex3XPOmxKLvQ== Subject: Re: [dpdk-stable] [PATCH] net/mlx5: fix external buffer pool registration for Rx queue 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: Friday, February 12, 2021 1:07 PM > To: dev@dpdk.org > Cc: Raslan Darawsheh ; Matan Azrad > ; stable@dpdk.org > Subject: [PATCH] net/mlx5: fix external buffer pool registration for Rx q= ueue >=20 > On Rx queue creation the mlx5 PMD registers the data buffers of the > specified pools for DMA operations. It scans the mem_list of the pools > and creates the MRs (DMA related NIC objects) for the chunks found. > If the pool is created with rte_pktmbuf_pool_create_extbuf() and > refers to the external attached buffers (whose are in the area of > application responsibility and it should explicitly register the > data buffer memory for DMA with rte_dev_dma_map() call) the chunks > contain the mbuf structures only, w/o any built-in data buffers. > Hence, DMA with mlx5 NIC never happens to this area and there is > no need to create MRs for these ones. >=20 > The extra not needed MRs were created for the pools with external > buffers causing MR cache load and performance was slightly affected. > The patch checks the mbuf pool type and skips MR creation for the > pools with external buffers. >=20 > Fixes: bdb8e5b1ea7b ("net/mlx5: allow allocated mbuf with external buffer= ") > Cc: stable@dpdk.org >=20 > Signed-off-by: Viacheslav Ovsiienko > --- Patch applied to next-net-mlx, Kindest regards, Raslan Darawsheh