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Fri, 11 Jun 2021 18:30:24 +0000 From: Radhey Shyam Pandey To: Lars-Peter Clausen , "vkoul@kernel.org" , "robh+dt@kernel.org" , Michal Simek CC: "dmaengine@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , git Subject: RE: [RFC v2 PATCH 6/7] dmaengine: xilinx_dma: Use tasklet_hi_schedule for timing critical usecase Thread-Topic: [RFC v2 PATCH 6/7] dmaengine: xilinx_dma: Use tasklet_hi_schedule for timing critical usecase Thread-Index: AQHXLWnYyET0Sdl3eEuBNLLlieUfgqq1Mh8AgFotgtA= Date: Fri, 11 Jun 2021 18:30:24 +0000 Message-ID: References: <1617990965-35337-1-git-send-email-radhey.shyam.pandey@xilinx.com> <1617990965-35337-7-git-send-email-radhey.shyam.pandey@xilinx.com> <52f01459-13be-ff29-1c07-b98636169c74@metafoo.de> In-Reply-To: <52f01459-13be-ff29-1c07-b98636169c74@metafoo.de> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply X-MS-TNEF-Correlator: authentication-results: metafoo.de; 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Fri, 11 Jun 2021 18:30:24 +0000 Received: from BY5PR02MB6520.namprd02.prod.outlook.com ([fe80::d880:7694:92d6:7798]) by BY5PR02MB6520.namprd02.prod.outlook.com ([fe80::d880:7694:92d6:7798%5]) with mapi id 15.20.4219.024; Fri, 11 Jun 2021 18:30:24 +0000 From: Radhey Shyam Pandey To: Lars-Peter Clausen , "vkoul@kernel.org" , "robh+dt@kernel.org" , Michal Simek CC: "dmaengine@vger.kernel.org" , "devicetree@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "linux-kernel@vger.kernel.org" , git Subject: RE: [RFC v2 PATCH 6/7] dmaengine: xilinx_dma: Use tasklet_hi_schedule for timing critical usecase Thread-Topic: [RFC v2 PATCH 6/7] dmaengine: xilinx_dma: Use tasklet_hi_schedule for timing critical usecase Thread-Index: AQHXLWnYyET0Sdl3eEuBNLLlieUfgqq1Mh8AgFotgtA= Date: Fri, 11 Jun 2021 18:30:24 +0000 Message-ID: References: <1617990965-35337-1-git-send-email-radhey.shyam.pandey@xilinx.com> <1617990965-35337-7-git-send-email-radhey.shyam.pandey@xilinx.com> <52f01459-13be-ff29-1c07-b98636169c74@metafoo.de> In-Reply-To: <52f01459-13be-ff29-1c07-b98636169c74@metafoo.de> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-Auto-Response-Suppress: DR, RN, NRN, OOF, AutoReply X-MS-TNEF-Correlator: authentication-results: metafoo.de; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org > -----Original Message----- > From: Lars-Peter Clausen > Sent: Thursday, April 15, 2021 12:41 PM > To: Radhey Shyam Pandey ; vkoul@kernel.org; > robh+dt@kernel.org; Michal Simek > Cc: dmaengine@vger.kernel.org; devicetree@vger.kernel.org; linux-arm- > kernel@lists.infradead.org; linux-kernel@vger.kernel.org; git > > Subject: Re: [RFC v2 PATCH 6/7] dmaengine: xilinx_dma: Use > tasklet_hi_schedule for timing critical usecase > > On 4/9/21 7:56 PM, Radhey Shyam Pandey wrote: > > Schedule tasklet with high priority to ensure that callback processing > > is prioritized. It improves throughput for netdev dma clients. > Do you have specific numbers on the throughput improvement? IIRC there was ~5% performance improvement but I did that a long back on an older kernel 4.8 and after that onward I always checked overall performance (having all optimization applied). In next version i will redo incremental profiling and capture improvement % in the commit description. Thanks, Radhey _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel