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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: MWHPR12MB1472.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2cf8bbc7-b3c8-4d5a-743f-08d9049a0471 X-MS-Exchange-CrossTenant-originalarrivaltime: 21 Apr 2021 07:49:39.4115 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: oNbAY3gPe64VHVALBlvz4FG2aQuuseqyWpAXeAekfv7KdNKaXiHD061g4aJbwMZHUkt/10gBfUxpdD9Rs2hYzg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR12MB1917 Subject: Re: [dpdk-dev] [PATCH 2/2] pipeline: autodetect endianness of action args X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org Sender: "dev" <dev-bounces@dpdk.org> Hi, > -----Original Message----- > From: dev <dev-bounces@dpdk.org> On Behalf Of Thomas Monjalon > Sent: Tuesday, April 20, 2021 10:58 PM > To: Cristian Dumitrescu <cristian.dumitrescu@intel.com> > Cc: dev@dpdk.org > Subject: Re: [dpdk-dev] [PATCH 2/2] pipeline: autodetect endianness of > action args >=20 > 12/04/2021 01:23, Cristian Dumitrescu: > > Each table entry is made up of match fields and action data, with the > > latter made up of the action ID and the action arguments. The approach > > of having the user specify explicitly the endianness of the action > > arguments is difficult to be picked up by P4 compilers, as the P4 > > compiler is generally unaware about this aspect. > > > > This commit introduces the auto-detection of the endianness of the > > action arguments by examining the endianness of the their destination: > > network byte order (NBO) when they get copied to headers and host byte > > order (HBO) when they get copied to packet meta-data or mailboxes. > > > > The endianness specification of each action argument as part of the > > rule specification, e.g. H(...) and N(...) is removed from the rule > > file and auto-detected based on their destination. The DMA instruction > > scope is made internal, so mov instructions need to be used. The > > pattern of transferring complete headers from table entry action args > > to headers is detected, and the associated set of mov instructions > > plus header validate is internally detected and replaced with the > > internal-only DMA instruction to preserve performance. > > > > Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com> >=20 > Series applied, thanks >=20 >=20 I believe this patchset is causing the build failures in https://bugs.dpdk.= org/show_bug.cgi?id=3D683. Regards, Ali