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CAT:NONE; SFS:(13230001)(4636009)(36840700001)(40470700004)(46966006)(83380400001)(26005)(52536014)(336012)(186003)(36860700001)(8936002)(9686003)(7696005)(6506007)(316002)(81166007)(6200100001)(40460700003)(33656002)(70586007)(2906002)(86362001)(70206006)(55016003)(356005)(54906003)(4326008)(82310400004)(6862004)(47076005)(5660300002)(508600001)(966005)(8676002); DIR:OUT; SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Feb 2022 21:51:35.8826 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 805fbe57-5c41-4b65-1d97-08d9ea840325 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d; Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: DB5EUR03FT039.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB6PR0801MB1653 X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org The failure in ci/iol-x86_64-unit-testing on this patch seems to be unrelat= ed to the patch. > -----Original Message----- > From: Kathleen Capella > Sent: Friday, February 4, 2022 6:26 PM > Cc: dev@dpdk.org; nd ; Dharmik Thakkar > ; Honnappa Nagarahalli > ; Kathleen Capella > > Subject: [PATCH 0/2] Add logic to IAVF to count continuous DD bits for Ar= m >=20 > This patchset introduces a fix for Arm platforms to the IAVF driver that = was > added to the i40e driver in a previous patchset [1]. >=20 > The driver determines which descriptors in the HW ring reference packets > that are ready to be received by counting those descriptors whose DD bit = is > set to 1. On Arm, the reading of descriptors can be reordered. The CPU ma= y > be reading descriptors as the NIC is updating them. Tt is possbile that t= he DD > bit for a descriptor earlier in the queue is read as not set while the DD= bit for > a descriptor later in the queue is read as set. This patchset ensures onl= y > contiguous DD bits set to 1 are counted. >=20 > The first patch in this series adds this logic to the bulk Rx path. > The second patch adds this same logic to the function which reads flexibl= e Rx > descriptors. >=20 > No performance drop was observed when running l3fwd on N1SDP with a > single core. >=20 > [1] > https://patches.dpdk.org/project/dpdk/patch/20210706065404.25137-2- > joyce.kong@arm.com/ >=20 > Kathleen Capella (2): > net/iavf: count continuous DD bits for Arm > net/iavf: count continuous DD bits for Arm in flex Rx >=20 > drivers/net/iavf/iavf_rxtx.c | 52 ++++++++++++++++++++++++++++++------ > 1 file changed, 44 insertions(+), 8 deletions(-) >=20 > -- > 2.17.1