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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: SJ1PR11MB6180.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: fb8920ac-0b74-4506-45c1-08daa1c17506 X-MS-Exchange-CrossTenant-originalarrivaltime: 29 Sep 2022 02:22:28.9983 (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: iVFpO698bQZKIkhkNxFgsGuJm1dSQrgMkBBOGRtR155Umr+dSRan/hnLFR3jUPPQ7AZ0Gm/cO1+hjizNLzkoBtaGRHa6R65Vd9+FpbYCAh37C0uxfeWt+pKEV9hCFttP X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR11MB6913 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hi Andrew, Thanks for reviewing.=20 Please see my reply in-line. > -----Original Message----- > From: Andrew Lunn > Sent: Tuesday, 27 September, 2022 11:27 PM > To: Zulkifli, Muhammad Husaini > Cc: intel-wired-lan@osuosl.org; netdev@vger.kernel.org; > davem@davemloft.net; kuba@kernel.org; edumazet@google.com; Gomes, > Vinicius ; Gunasekaran, Aravindhan > ; Ahmad Tarmizi, Noor Azura > > Subject: Re: [PATCH v1 0/4] Add support for DMA timestamp for non-PTP > packets >=20 > On Tue, Sep 27, 2022 at 09:06:52PM +0800, Muhammad Husaini Zulkifli > wrote: > > The HW TX timestamps created by the NIC via socket options can be > > requested using the current network timestamps generation capability > > of SOF_TIMESTAMPING_TX_HARDWARE. The most common users of this > socket > > flag is PTP, however other packet applications that require tx > > timestamps might also ask for it. > > > > The problem is that, when there is a lot of traffic, there is a high > > chance that the timestamps for a PTP packet will be lost if both PTP > > and Non-PTP packets use the same SOF TIMESTAMPING TX HARDWARE > causing the tx timeout. > > > > DMA timestamps through socket options are not currently available to > > the user. Because if the user wants to, they can configure the > > hwtstamp config option to use the new introduced DMA Time Stamp flag > > through the setsockopt(). > > > > With these additional socket options, users can continue to utilise HW > > timestamps for PTP while specifying non-PTP packets to use DMA > > timestamps if the NIC can support them. >=20 > Although this is not actually for PTP, you probably should Cc: the PTP > maintainer for patches like this. Thanks. 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charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" Hi Andrew, Thanks for reviewing. Please see my reply in-line. > -----Original Message----- > From: Andrew Lunn > Sent: Tuesday, 27 September, 2022 11:27 PM > To: Zulkifli, Muhammad Husaini > Cc: intel-wired-lan@osuosl.org; netdev@vger.kernel.org; > davem@davemloft.net; kuba@kernel.org; edumazet@google.com; Gomes, > Vinicius ; Gunasekaran, Aravindhan > ; Ahmad Tarmizi, Noor Azura > > Subject: Re: [PATCH v1 0/4] Add support for DMA timestamp for non-PTP > packets > > On Tue, Sep 27, 2022 at 09:06:52PM +0800, Muhammad Husaini Zulkifli > wrote: > > The HW TX timestamps created by the NIC via socket options can be > > requested using the current network timestamps generation capability > > of SOF_TIMESTAMPING_TX_HARDWARE. The most common users of this > socket > > flag is PTP, however other packet applications that require tx > > timestamps might also ask for it. > > > > The problem is that, when there is a lot of traffic, there is a high > > chance that the timestamps for a PTP packet will be lost if both PTP > > and Non-PTP packets use the same SOF TIMESTAMPING TX HARDWARE > causing the tx timeout. > > > > DMA timestamps through socket options are not currently available to > > the user. Because if the user wants to, they can configure the > > hwtstamp config option to use the new introduced DMA Time Stamp flag > > through the setsockopt(). > > > > With these additional socket options, users can continue to utilise HW > > timestamps for PTP while specifying non-PTP packets to use DMA > > timestamps if the NIC can support them. > > Although this is not actually for PTP, you probably should Cc: the PTP > maintainer for patches like this. Thanks. Added Richard in the CC list. > > Andrew _______________________________________________ Intel-wired-lan mailing list Intel-wired-lan@osuosl.org https://lists.osuosl.org/mailman/listinfo/intel-wired-lan