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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DB9PR04MB9332.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 4abd7149-446d-4276-1517-08dd969ad197 X-MS-Exchange-CrossTenant-originalarrivaltime: 19 May 2025 06:03:04.1613 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: SoyF/uO96KC22BP/su15moevShdkrAXT/FjPn6PfDaEu8Lra0u6iT/2A2rcqnOGgCnZDJGjA34tPIB7CLoSzBQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PAXPR04MB8459 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 > -----Original Message----- > From: Anoob Joseph > Sent: 16 May 2025 20:11 > To: Akhil Goyal ; dev@dpdk.org > Cc: suanmingm@nvidia.com; kai.ji@intel.com; Hemant Agrawal > ; brian.dooley@intel.com; Akhil Goyal > > Subject: RE: [PATCH] doc: add limitation in using segment-sz in crypto-pe= rf > Importance: High >=20 > > Subject: [PATCH] doc: add limitation in using segment-sz in > > crypto-perf > > > > When segment-sz is given as parameter, use buffer-sz in descending > > order. > > The reason is, same scatter gather buffer list is being used for all > > packet sizes which is initialized once in the beginning. > > Now if a small packet case is run first, mbuf SG list will be trimmed > > to a smaller number of SG and rest of the SGs are lost resulting in seg= fault. > > Buffers cannot be re-initialized as that will come in datapath and will= be > costly. > > So to workaround this, if segment-sz is passed as argument, use values > > in buffer-sz in descending order. > > > > Signed-off-by: Akhil Goyal >=20 > Acked-by: Anoob Joseph Acked-by: Hemant Agrawal