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Venkataraman" , Matthew Garrett , Matthew Wilcox , Miklos Szeredi , Mimi Zohar , Paul Moore , =?UTF-8?Q?Philippe_Tr=c3=a9buchet?= , Scott Shell , "Shuah Khan" , Steve Dower , Steve Grubb , Thibaut Sautereau , Vincent Strubel , , , , , , , =?UTF-8?Q?Micka=c3=abl_Sala=c3=bcn?= References: <20211012192410.2356090-2-mic@digikod.net> <20211105064159.GB17949@xsang-OptiPlex-9020> <202111090920.4958E610D1@keescook> <95966337-b36e-f45e-6b16-f433bcb90c4d@digikod.net> From: Yin Fengwei In-Reply-To: <95966337-b36e-f45e-6b16-f433bcb90c4d@digikod.net> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-ClientProxiedBy: SG2PR06CA0115.apcprd06.prod.outlook.com (2603:1096:1:1d::17) To CO1PR11MB4820.namprd11.prod.outlook.com (2603:10b6:303:6f::8) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: c42d377b-7ae4-4adf-77dc-08d9a4c39461 X-MS-TrafficTypeDiagnostic: MWHPR11MB0013: X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8882; 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It also could be >>> related with netperf throughput testing. >> Does moving the syscall implementation somewhere else change things? >> That's a _huge_ performance change for something that isn't even called. >> What's going on here? > This regression doesn't make sense. I guess this is the result of a > flaky netperf test, maybe because the test machine was overloaded at > that time. I agree the test result looks strange. But I don't think the test machine or test methodology has issue. It's not possible the test box is overloaded when test case is running. We did test several times (> 12 times) on different days. Thanks. Regards Yin, Fengwei