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Content-Language: en-US To: Thomas Monjalon , Ajit Khaparde Cc: dev@dpdk.org, Aman Singh , Yuying Zhang , Somnath Kotur , Nithin Dabilpuram , Kiran Kumar K , Sunil Kumar Kori , Satha Rao , Hemant Agrawal , Sachin Saxena , Simei Su , Wenjun Wu , Qi Zhang , Xiao Wang , Beilei Xing , Qiming Yang , Jiawen Wu , Jian Wang , david.marchand@redhat.com, Olivier MATZ References: <20230203132810.14187-1-thomas@monjalon.net> <3062773.CbtlEUcBR6@thomas> From: Ferruh Yigit Autocrypt: addr=ferruh.yigit@amd.com; keydata= xsFNBGJDD3EBEAC/M7Tk/DfQSmP1K96vyzdhfSBzlCaGtcxNXorq4fALruqVsD3oi0yfyEz9 4YN8x7py0o9EL8ZdpOX0skc0AMCDAaw033uWhCn0GLMeGRKUbfOAPvL6ecSDvGD7CJIO9j0J eZUvasBgPdM/435PEr9DmC6Ggzdzt8IuG4PoLi5jpFSfcqxZFCCxLUDEo/w0nuguk2FTuYJg B2zEZ4JTBZrw7hIHiFh8D8hr6YA6a5uTofq1tr+l048lbtdFUl8TR0aIExVzE4Z8qKZlcE+9 RQaewjK5Al1jLE4sHdmd3GN+IvgDF3D/fLsi25SKJDeGSdeHkOmaX0qGeM4WKIfU6iARRCiQ N3AmBIxZ/A7UXBKLaOyZ+/i3sE6Wb53nrO4i8+0K2Qwyh6LjTeiJAIjYKN43ppxz3DaI+QwQ 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X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB6887 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 On 11/2/2023 10:17 PM, Thomas Monjalon wrote: > 02/11/2023 22:21, Ajit Khaparde: >> On Thu, Nov 2, 2023 at 2:13 PM Ferruh Yigit wrote: >>> On 6/25/2023 4:45 PM, Thomas Monjalon wrote: >>>> 23/06/2023 16:00, Ferruh Yigit: >>>>> On 2/3/2023 1:28 PM, Thomas Monjalon wrote: >>>>>> The option RTE_LIBRTE_IEEE1588 has no effect on any library >>>>>> unlike its name. >>>>>> >>>>>> Also we are suppose to enable/disable features dynamically, >>>>>> not at compilation time. >>>>>> >>>>>> And the best is that this macro is neither documented, >>>>>> nor in rte_config.h. >>>>>> >>>>>> It looks to be a mistake keeping this flag, so it is removed, >>>>>> meaning always enabled. >>>>>> PS: it is disabling vector paths of some drivers. >>>>>> >>>>> >>>>> PTP (IEEE1588) processing brings additional overhead to datapath. >>>>> >>>>> Agree that it is not good to have undocumented compile macro, but just >>>>> removing it may cause performance degradation. >>>>> >>>>> It may be possible to have separate burst function that supports PTP and >>>>> driver configures it when application explicitly request it with a new >>>>> offload flag (although it is not exactly an offload), what do you think? >>>> >>>> The best is to enable dynamically with different functions. >>> >>> There was no comment from driver maintainers. > > If I made a baby when sending this patch, it would be a birth today. > Isn't it enough time to warn maintainers? > >>> Perhaps better option is plan flag removal and execute it, like to >>> remove the flag in 24.11 LTS, this gives enough time for drivers to update. > > You want to give time for one more baby? > >>> If this sounds good, I can send a deprecation notice to record this plan. >> +1 > > Which plan? 2 babies? > > :) remove compile flag in 24.11 LTS. But we may end up in same situation in 24.11, some drivers not being ready, so we should merge this patch very early in the 24.11 to give time to drivers to fix if they were not ready at that time. Other option is merge this patch in 24.07, so that vendors which were not ready can plan a fix for 24.11? Although enforcing an update by breaking the driver is not best planning, it may be an efficient one.