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[209.132.180.67]) by mx.google.com with ESMTP id z70si25776760pgd.86.2019.04.08.00.46.42; Mon, 08 Apr 2019 00:46:58 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726050AbfDHHqD (ORCPT + 99 others); Mon, 8 Apr 2019 03:46:03 -0400 Received: from mx2.suse.de ([195.135.220.15]:42972 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725877AbfDHHqD (ORCPT ); Mon, 8 Apr 2019 03:46:03 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 36958AFCF; Mon, 8 Apr 2019 07:46:01 +0000 (UTC) From: NeilBrown To: kernel test robot Date: Mon, 08 Apr 2019 17:45:50 +1000 Cc: Jens Axboe , Xiao Ni , Song Liu , LKML , Jens Axboe , lkp@01.org Subject: Re: [MD] 4bc034d353: aim7.jobs-per-min -86.0% regression In-Reply-To: <20190408071204.GG11264@shao2-debian> References: <20190408071204.GG11264@shao2-debian> Message-ID: <875zrpym6p.fsf@notabene.neil.brown.name> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-=-= Content-Type: text/plain On Mon, Apr 08 2019, kernel test robot wrote: > Greeting, > > FYI, we noticed a -86.0% regression of aim7.jobs-per-min due to commit: That is expected. The following commit 2bc13b83e6298486371761de503faeffd15b7534 should restore the performance. NeilBrown > > > commit: 4bc034d35377196c854236133b07730a777c4aba ("Revert "MD: fix lock contention for flush bios"") > https://git.kernel.org/cgit/linux/kernel/git/axboe/linux-block.git for-5.2/block > > in testcase: aim7 > on test machine: 40 threads Intel(R) Xeon(R) CPU E5-2690 v2 @ 3.00GHz with 384G memory > with following parameters: > > disk: 4BRD_12G > md: RAID0 > fs: xfs > test: sync_disk_rw > load: 300 > cpufreq_governor: performance > > test-description: AIM7 is a traditional UNIX system level benchmark suite which is used to test and measure the performance of multiuser system. > test-url: https://sourceforge.net/projects/aimbench/files/aim-suite7/ > > --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEG8Yp69OQ2HB7X0l6Oeye3VZigbkFAlyq/DAACgkQOeye3VZi gbn1+BAAlAciuUy7lG/qqab1gfE1NEBJZRjGSxNHfvdl12n3LKacNCbTsy8EgkmU ofGjaGGqj8UNZvRzH+ThyOR5LwBj2ng0dXGzbBQYBZQAiszPaxBwo40DEVhTX1FE apDbFEn2IPfKLShj7S8K++ehwTUeROdodbTf35TLJqWT/CyiwYfxr6mjNy1VrExc 4/Dl/ZUoWTNI9uh89tkef+y+6nLz9/C6fGFmApN4iS8QX7Zl+M3H14cL2EqFpXYr FPqEesahSigHaSu4uuBFU5JvpPXeloFTBlnJ0m8vCaGfCBph2cLqksZep07pBEcC bHF9pHOi0xZVdob7UTpA3AU5bzGyOJIjYgfVXBRC5pfgtmPe3F+d1pyeF//F6aGR Jj4BfXzE52ffC5gys05wDtH4YfQGh+LuXeU+p1AKPsoHdF0ZZkxqdDjI09WtTuof 19V6fJP3es1tsVEMWgtR9Kpcd86Eluu94qfRmHro+cc8il7fesMYuj1TrXLWJo+p WFcWIOZjZnd3niqg/JBzzxwZ0mropfjBT9uhzio4Aics8mE6nMTdZQ9FqPvYlOjZ GIGlURyT72gyb0HSzn9mHq4dy+21SyqqQzh2dutH0QiVi452qfuFqnWI3QuYUnEd WqUi51lJEdayAdQOpHr1Upr59LN3ZvYYmwfdw75/++4AYleIFSc= =NyDi -----END PGP SIGNATURE----- --=-=-=--