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Sat, 31 Jul 2021 17:57:23 +0000 From: Akhil Goyal To: Raja Zidane , "dev@dpdk.org" , Thomas Monjalon CC: "matan@nvidia.com" , "stable@dpdk.org" Thread-Topic: [EXT] [dpdk-dev] [PATCH] compress/mlx5: fix level translation in xform API Thread-Index: AQHXhIOvLDYu6jpKy0mJV4CRs54aH6tdYb1Q Date: Sat, 31 Jul 2021 17:57:23 +0000 Message-ID: References: <20210729141108.20908-1-rzidane@nvidia.com> In-Reply-To: <20210729141108.20908-1-rzidane@nvidia.com> Accept-Language: en-US Content-Language: en-US X-Mentions: thomas@monjalon.net 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=marvell.com; x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: fd5ff301-4708-4489-47ba-08d9544ca644 x-ms-traffictypediagnostic: CO1PR18MB4796: x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:8882; x-ms-exchange-senderadcheck: 1 x-ms-exchange-antispam-relay: 0 x-microsoft-antispam: BCL:0; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: marvell.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: CO6PR18MB4484.namprd18.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: fd5ff301-4708-4489-47ba-08d9544ca644 X-MS-Exchange-CrossTenant-originalarrivaltime: 31 Jul 2021 17:57:23.1743 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 70e1fb47-1155-421d-87fc-2e58f638b6e0 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: gKy7MUa7oxqmSVKnMZ6FgSmjOYuVKSwvBvNqZW6W9IFWLXYdAnefr9Izh/J+xnBIM4Vgobaq+5GphWNDJeyb4g== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CO1PR18MB4796 X-Proofpoint-ORIG-GUID: eychgyj0tGQhPicuECcr8Do6IVC-7Iu0 X-Proofpoint-GUID: eychgyj0tGQhPicuECcr8Do6IVC-7Iu0 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.391, 18.0.790 definitions=2021-07-31_05:2021-07-30, 2021-07-31 signatures=0 Subject: Re: [dpdk-stable] [EXT] [dpdk-dev] [PATCH] compress/mlx5: fix level translation in xform API 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" > Compression Level is interpreted by each PMD differently. > However, lower numbers give faster compression > at the expense of compression ratio, while higher numbers > may give better compression ratios but are likely slower. > The level affects the block size, which affects performance, > the bigger the block, the faster the compression is. >=20 > The problem was that higher levels caused bigger blocks: > size =3D min_block_size - 1 + level. >=20 > the solution is to reverse the above: > size =3D max_block_size + 1 - level. >=20 > Fixes: 39a2c8715f8f ("compress/mlx5: add transformation operations") > Cc: matan@nvidia.com > Cc: stable@dpdk.org >=20 > Signed-off-by: Raja Zidane > --- This patch is not acked, hence not applied for RC3. @Thomas Monjalon can you pick it directly if it gets acked?