From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mout.kundenserver.de (mout.kundenserver.de [212.227.17.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C4C122592 for ; Wed, 1 Jun 2022 21:02:33 +0000 (UTC) Received: from [192.168.41.150] ([46.114.146.95]) by mrelayeu.kundenserver.de (mreue108 [212.227.15.183]) with ESMTPSA (Nemesis) id 1Mv2pC-1nehWB2b56-00r4FC for ; Wed, 01 Jun 2022 23:02:31 +0200 Message-ID: <79bb603e-37cb-d1dd-1e12-7ce28d7cfdae@i2se.com> Date: Wed, 1 Jun 2022 23:02:30 +0200 Precedence: bulk X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.1 Subject: Re: vchiq: Performance regression since 5.18-rc1 Content-Language: en-US From: Stefan Wahren To: regressions@lists.linux.dev References: <77d6d498-7dd9-03eb-60f2-d7e682bb1b20@i2se.com> <69590289-58ef-d32b-0459-36fa00627605@i2se.com> In-Reply-To: <69590289-58ef-d32b-0459-36fa00627605@i2se.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Provags-ID: V03:K1:phRpW5te+24a6IM9LQKTV/Cmho826c2xnzbN/kpNljmPl/r4m+P jR/ek3KaUc5r1eYYNlZQ+vJhifAxj/RerZm+p+axX2NZFt9uz8x4qkQLxB8wntcMJXqrpyp Q7F/uUW+9E749SCTqWL1v++psTlgtNaN7qL9M1LKTgwbmUmEGA9FCrsqMgP3SVw9v8TAuRY kKKNxf7HXMpQSq+k/qzqw== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:ffk7JCtDkTE=:eN8YG6IeWJvMIIzMoLKN+K /tudUpMkTWlOtPTEAqdLB7f/Huoo9rCfdfD09Vnf488FpdEmDE7TMfxhkY7Kv1jMQc1Y6cDwE JWDbnL9xspXgEpr7fg3uVRZ2A3P4EjlopnlyzrtEGzea/sYb6je42h9JamUNpuqhbcSLhs7cI mDNKuaS3STLOfiTuH2qGkvSvWr2qW+aUWshBXYV3mosJnuii6a0bouxjUhiaYVV6BKWBw/XgV XWWUK/55Yqr3X1AdPPGxo1xQKbungaj0dikJgulwOKQNsyJrwBHSoGTfiP5jOR1kdqS6zonCB yNLmIm1xbNTWxAUgCmywdRjrhDmyXGOAFI2n7TkVBvArDD+f5l8lJF628MB5GhSjt/wFoNclL 9CXF4MfFCNjPaXfhd57NulJZJgUbIpGKGcbYTOde7FqiXqJkGBw05qblz9bFTyMuvnOJVnO3l UET24sEAXRaJKEN3KB4yosTSheXe8OGqT/fIbJKikQhOd45DWkYaM082Yv3RuZhKmiJIZNIpa /WU6SW1qkh0aAWagWCuGtiTNlygPv25M30Vwrips3nkkE5AQoxmkyI1Uei4a2jjlqu8+r1yG9 XnlvCkIz/55DUQ6bS8JzRhrMf6X2RYZbnLmgzdvq8B/rFbq8TaDaSpvlZ85jOte2vyMmk5TP0 pkurXf8B0vmC5+3DpQdk2QoffJCJAYMy7iIawMIfaT4yFvvj1p2NCGRuicX28Pwza1g5Nd9oY CWbQ1MvWENHTWi06242jtM1kZttaB3e40POZjv4Oo01m/ByxOqqFgbRq/8E= |||#regzbot fixed-by: 350e15124ee3| Am 30.05.22 um 11:54 schrieb Stefan Wahren: > Hi Marcelo, > hi Sebastian, > > Am 25.05.22 um 15:56 schrieb Marcelo Tosatti: >> On Mon, May 23, 2022 at 09:09:07AM +0200, Sebastian Andrzej Siewior >> wrote: >>> On 2022-05-22 01:22:00 [+0200], Stefan Wahren wrote: >>>> Hi, >>> Hi, >>> >>>> while testing the staging/vc04_services/interface/vchiq_arm driver >>>> with my >>>> Raspberry Pi 3 B+ (multi_v7_defconfig) i noticed a huge performance >>>> regression since [ff042f4a9b050895a42cae893cc01fa2ca81b95c] mm: >>>> lru_cache_disable: replace work queue synchronization with >>>> synchronize_rcu >>>> >>>> Usually i run "vchiq_test -f 1" to see the driver is still working >>>> [1]. >>> What about >>>     https://lore.kernel.org/all/YmrWK%2FKoU1zrAxPI@fuller.cnet/ >>> >>> Sebastian >> Stefan, >> >> Can you please try the patch above ? > > this patch fixes the regression. Great > > Best regards > >> >> >> >> _______________________________________________ >> linux-arm-kernel mailing list >> linux-arm-kernel@lists.infradead.org >> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel