From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C6100C433F5 for ; Sun, 29 May 2022 22:49:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=ju1t0Ctg/nSqDBEFUNutsXRqZQU1QO6Ag/15seN2Qdc=; b=rrhCLSbZ2+2qpw aPwmMLkDJAjoNvs0u8U9/dL0uTOpfdlE6rYJC/mY/zYpZtQtAiymewI3DOjk7afu89CjnyeAZerj5 EWJyFIV6tF9LAlTACD80SyWrYGdf94D/sXdlQVtyq3QZFMUdwqwGimPArXq8bpBS57evzXw51dpv0 6tVWCt8VMftPds3vlg6p4+EdAWX/jfVtTwGq5D6Fcw6bckyFVbBgTB6d+lgMYZEK7nqQ3uWthS6Fj o1Vl6fH1dBzAarRMaiBbiCveXnY2+oKp+X9dg4eAgmJ+0Hkuq5BjFZi/Cu/tRp/VqTPbMSGYk5coT FZlwFdga/Ti3oosFQZHQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nvRhG-004oJc-EA; Sun, 29 May 2022 22:47:42 +0000 Received: from mout.kundenserver.de ([212.227.126.131]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nvRhC-004oIp-F6 for linux-arm-kernel@lists.infradead.org; Sun, 29 May 2022 22:47:40 +0000 Received: from [192.168.1.107] ([37.4.249.170]) by mrelayeu.kundenserver.de (mreue012 [212.227.15.167]) with ESMTPSA (Nemesis) id 1MF2YC-1o20Bu1rMO-00FUaY; Mon, 30 May 2022 00:47:06 +0200 Message-ID: Date: Mon, 30 May 2022 00:47:04 +0200 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 To: Marcelo Tosatti Cc: Sebastian Andrzej Siewior , Andrew Morton , Nicolas Saenz Julienne , Borislav Petkov , Minchan Kim , Matthew Wilcox , Mel Gorman , Juri Lelli , Thomas Gleixner , "Paul E. McKenney" , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Linux ARM , Phil Elwell , regressions@lists.linux.dev References: <77d6d498-7dd9-03eb-60f2-d7e682bb1b20@i2se.com> From: Stefan Wahren In-Reply-To: X-Provags-ID: V03:K1:Q4/bnpQYeqTZyYV3rxCUCfh0mQig/0UfrYdXJ7wL/7l+YvbbS3Y 57BojHvt+El4ipo4vGh+DT+flV0nRsZHN7p2etqR+eOlMtSq8lLZOO6HR2RC4WX6LvQ0h7g g82AdyonYlGam+YlgSPwHk9cay4moHXj01AOIIy+hb5lg2AFOCAyOlDaLzZdZLjg1J0ssFq G6SFcpG464ltDyCdw/XWA== X-UI-Out-Filterresults: notjunk:1;V03:K0:oOt7M8ZsNGA=:MVLExm6p1USWJejZUx5ppd Y3n8O/ac1PQFSa31Qq1/HPpVVjsh6SSXGH8e5hoaLTMJweIzKh8/Ac4EAG+Wsk5c+IR5phq3F B35r8/d5vI5K7D112JJ/WV5QEJckNCNGCna9DOdFxjhIOK6xiRyXbYuADsoNpSVNqAQDraBTM iLQYawGmYOGebrqmHCTiaTDqS+HIF6HTrNkLEYkSSiKDLvpsXr8urnv5ti6EPWHO59lj2OcwE Soa3eaLdzZwc7+xbWb7WSggzOovKn1Nxwda8lyQWJe/G7W7qlvL58rgKTyGGpSzKMgiAGlDJG hCOhXjWdjHPEHYQfvivo8hi/CXASyuqQBH6hjksCVpY69ejhJy9zDQeIsCrbQWxHmZGWuSx7A xyQP1utQ6MVflzQrUjYAEHwEL2lRv5mu7F7cEPMCODKW6V5tVEMgQY6A4sy0OSSSBxOUNMAZJ LzMo//TQWhvN0/ZfAgMmttBs1HMSS8e5nfIuV0wKwA9SctqKGlEqCufrNGG+OVuCbjPn4pL4V MDXRtDFYQrT5uhEpdNrsZjYNiGysGsglpe/Z+Yr3ishglRjeCA7FjLsBDsRycKxl/OZlmJ1zg GMkZZa1KNRGjkcfqZXapqgbvhp/t55zgckuYtkTKtAJOAnbPqbB4zW9Fe0TvWbKZ3McD11Xtr JpOuEKIvnk9GWAWeh4jrdQhQP/0j6tUBrLtP5MJ8xwyBg4tq/v8+ShZY/y0xKjoy+gp7Z0jqp /g9lEkJSDhkUoiPXxRNwrzpc3x7q1L+yZoOesT72BJoIOzX2s+TCypsZh5M= X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220529_154738_837116_07D4F06D X-CRM114-Status: GOOD ( 17.54 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Am 25.05.22 um 17:37 schrieb Marcelo Tosatti: > On Wed, May 25, 2022 at 04:07:47PM +0200, Stefan Wahren wrote: >> Hi Marcelo, >> >> 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 was the same as Paul send. I think i need more time for investigation, >> maybe there is an issue with the application. > To clarify: they are not the same patches. Thanks for pointing out. I will test it ASAP. > >> All i noticed so far is that in good case the CPU usage is around ~ 60 % and >> higher, while in bad case the CPU is almost idle. Also the issue is not >> reproducible with arm64/defconfig. >> >>> >>> >>> _______________________________________________ >>> linux-arm-kernel mailing list >>> linux-arm-kernel@lists.infradead.org >>> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel >> _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel