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Thu, 16 Aug 2018 20:46:06 +0000 From: Yongseok Koh To: "dev@dpdk.org" CC: Shahaf Shuler Thread-Topic: [PATCH] doc: add mlx5 limitation of RSS hash result Thread-Index: AQHUM+/2T1nQJCUpcE6TltDSG6ehFqTC3GwA Date: Thu, 16 Aug 2018 20:46:06 +0000 Message-ID: References: <20180814165747.16148-1-yskoh@mellanox.com> In-Reply-To: <20180814165747.16148-1-yskoh@mellanox.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=yskoh@mellanox.com; x-originating-ip: [209.116.155.178] x-ms-publictraffictype: Email x-microsoft-exchange-diagnostics: 1; DB3PR0502MB4043; 6:rgAZGw/dT1oxYDTjqs/SNXN35EYh9jm1+UAapwImNTBCs1qWsGy04PJ3Ci8UGi4k3UWXQyTi+FnpXle4PH3UqIjMMKoBK8/qV/R5YF5A8uYvntMXda7bb4079lggZQuhI/fEXAqAj/91maIfbtRtWq/XXt3KzhjdF9MmBRKxXH6HlFfdvUCOaRccsvwEec3LeSKTSsVd8gP3AAeHmfPcFIxSTeX2QMNq38DlIsn1U+d5iPshCudgObGwedECTNbx3uIQ51/1jEqnnbDAVobrh9JAJsNAXDXdeM8dqvhAk6OL/f18AeivfjchV5FFISsCMsqdit2gSIrDyZvHEfHAMlMf2pS/ZTErhtdNI2PGDGPTpR4HBJ/XWsMxsg+EfdZNX5q6oaAMlk+ayfvHjIKNhG63H8uwX3YzsmpCnJmMzys5wVAf7Q+H9SoQy4P6Kj4c40p9p4GyS/TlwkdNCgjxBg==; 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DIR:OUT; SFP:1101; SCL:1; SRVR:DB3PR0502MB4043; H:DB3PR0502MB3980.eurprd05.prod.outlook.com; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: mellanox.com does not designate permitted sender hosts) x-microsoft-antispam-message-info: E1wVsXrG2g6yrNbSJWRIwCVESmGqVsrijX8GOK2cp0husIQf4c4FEnxBPDqvevIrQevpMruzx7hygfSuhjFiCu0xyrQfaj7zMZROaDGpa18NZ9FUPF2CHIYte2yB+4SxM10ECQ9VF4Q6thZfexWnuE6WOPbSnMS9pP37hO1I5YbtsGzXTEpiMTg6pmry5Mwc8x+0MQqSCMlgmml6zm2aseqb5fN9NTln01umQC+4IKt8IIyzHRvs+EBg4wZryclyNJV2btDDpIpAPHa9SHmHW35070sb1HrlZqjNhyy5wTTrY4ygXSMmp2R9UGHwX2FLVBpcUPuqs0HZs0hAqRTxDg7y5+06z4tJRRUL/Bz/DeE= spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="us-ascii" Content-ID: <3280DE26C63DDC4480EF1FF6D23B395E@eurprd05.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Mellanox.com X-MS-Exchange-CrossTenant-Network-Message-Id: 9704a333-a9df-45f4-b002-08d603b949d8 X-MS-Exchange-CrossTenant-originalarrivaltime: 16 Aug 2018 20:46:06.1337 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: a652971c-7d2e-4d9b-a6a4-d149256f461b X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB3PR0502MB4043 Subject: Re: [dpdk-dev] [PATCH] doc: add mlx5 limitation of RSS hash result X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 16 Aug 2018 20:46:08 -0000 > On Aug 14, 2018, at 9:57 AM, Yongseok Koh wrote: >=20 > Signed-off-by: Yongseok Koh > --- > doc/guides/nics/mlx5.rst | 6 ++++++ > 1 file changed, 6 insertions(+) >=20 > diff --git a/doc/guides/nics/mlx5.rst b/doc/guides/nics/mlx5.rst > index 52e1213cf5..cbcc233d03 100644 > --- a/doc/guides/nics/mlx5.rst > +++ b/doc/guides/nics/mlx5.rst > @@ -136,6 +136,12 @@ Limitations > enabled (``rxq_cqe_comp_en``) at the same time, RSS hash result is not = fully > supported. Some Rx packets may not have PKT_RX_RSS_HASH. >=20 > +- In general, PKT_RX_RSS_HASH shall be set in a received mbuf if RSS is = enabled > + and the packet is subject to hash cacalculation. However, in case of > + vectorized Rx (``rx_vec_en``), PKT_RX_RSS_HASH will always be set as l= ong as > + RSS is enabled. Zero hash result (mbuf->hash.rss) means the packet isn= 't > + subject to the configured RSS hash type and the flag should be disrega= rded. > + > Statistics > ---------- I have to take it back. We concluded there's a bug in the implementation and decided to fix this is= sue. Thanks, Yongseok=