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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: PH7PR11MB6006.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 96eb024e-0d6b-4526-bbb2-08da54e8dd93 X-MS-Exchange-CrossTenant-originalarrivaltime: 23 Jun 2022 07:20:35.2783 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: q1eFdwGPaIrl2UYiWqiK1e9sPma3ra/NQP9s+YumJu4CtqTicypgYWkau7GUDmaasTsbrcYjv2UTxlwrIaeUoQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ1PR11MB6251 X-OriginatorOrg: intel.com 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 > -----Original Message----- > From: Wang, YuanX > Sent: Wednesday, June 22, 2022 5:26 PM > To: maxime.coquelin@redhat.com; Xia, Chenbo ; > dev@dpdk.org > Cc: Hu, Jiayu ; He, Xingguang > ; Jiang, Cheng1 ; Wang, > YuanX ; stable@dpdk.org; Ling, WeiX > > Subject: [PATCH v4] examples/vhost: fix retry logic on eth rx path >=20 > drain_eth_rx() uses rte_vhost_avail_entries() to calculate the available > entries to determine if a retry is required. > However, this function only works with split rings, and calculating packe= d > rings will return the wrong value and cause unnecessary retries resulting= in a > significant performance penalty. >=20 > This patch fix that by using the difference between tx/rx burst as the re= try > condition. >=20 > Fixes: be800696c26e ("examples/vhost: use burst enqueue and dequeue > from lib") > Cc: stable@dpdk.org >=20 > Signed-off-by: Yuan Wang > Tested-by: Wei Ling > --- > V4: Fix fiexs tag. > V3: Fix mbuf index. > V2: Rebase to 22.07 rc1. > --- Tested-by: Wei Ling