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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F75AC32789 for ; Tue, 23 Aug 2022 20:35:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229933AbiHWUfX (ORCPT ); Tue, 23 Aug 2022 16:35:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44882 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231644AbiHWUfE (ORCPT ); Tue, 23 Aug 2022 16:35:04 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C0D32491CF for ; Tue, 23 Aug 2022 13:15:59 -0700 (PDT) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 7B6C4336A3; Tue, 23 Aug 2022 20:15:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_rsa; t=1661285758; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=ylLNO1fgckMQ5w81w1kel4JxKH9A6EdW63n6gd8KoHE=; b=cUvZqq9x8zguNrUikQwVS/Vigz3Rjm1raZg80myaDuOPoQmzgzP3wZ2WCtqvSQa23+iLoM M+82sNwgadc7I/zT4f61s0DBI9xFBjE8ZEK8ZtZly+hvpPsVt2GNw66Crqp2iThbwINVPB d7RB45Hskxl4qqv2vUPZbf4N2lOATh4= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.cz; s=susede2_ed25519; t=1661285758; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=ylLNO1fgckMQ5w81w1kel4JxKH9A6EdW63n6gd8KoHE=; b=ZFGVAfO1nKInv/f130Wc60um+9hztgPNEABclC13LAXGkwgPoIUCMnS/JTjIX0k6ldRJ6a isfHs2mivapT9uCw== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 680EC13A89; Tue, 23 Aug 2022 20:15:58 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id ZlNjGX41BWPGAQAAMHmgww (envelope-from ); Tue, 23 Aug 2022 20:15:58 +0000 Received: by quack3.suse.cz (Postfix, from userid 1000) id DF4E5A067B; Tue, 23 Aug 2022 22:15:57 +0200 (CEST) From: Jan Kara To: Ted Tso Cc: , Thorsten Leemhuis , Ojaswin Mujoo , Stefan Wahren , Harshad Shirwadkar , Jan Kara Subject: [PATCH 0/2] ext4: Fix performance regression with mballoc Date: Tue, 23 Aug 2022 22:15:52 +0200 Message-Id: <20220823134508.27854-1-jack@suse.cz> X-Mailer: git-send-email 2.35.3 MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1218; h=from:subject:message-id; bh=6TD0Hniho0zrt3E1zoZv0H/hS0BhvhWUEtZ3IoG9V0E=; b=owEBbQGS/pANAwAIAZydqgc/ZEDZAcsmYgBjBTVyOY7S0aoenEcikcYosX1ydyc0sL4oZ42AUFg3 AgYn1BKJATMEAAEIAB0WIQSrWdEr1p4yirVVKBycnaoHP2RA2QUCYwU1cgAKCRCcnaoHP2RA2VPbB/ sFn/0qmHE8iHDsZF+UMJOcSXCVdI3zqNwtFnqhf5SvnGKTywXTPoaUbXfxppWeDyqI9f1RqgnO1HUk qDgP0m5UmGxtgppb4IkqV5+M/P95BGfZUFuo1JuJbGitup4zdxhPwvAHthNdIm5PNm9mUuYhgPHNMS 2Zp40jqt7DEl1uR0esaf6JU23DKYseuCqthNuFgqaCvldHnNw/slgdj1MmcNa/S7112v5mF0HkPmGF pjfF6TGR/F7f7zjCoUBaJS+Jx9OYSwyTYfyBLdvGYzqO54gntrScvDNCSMJZmcMFZcNhD37ei54oHe pnAH3VGDT/eWS8hiNiA6Virn6mbhGE X-Developer-Key: i=jack@suse.cz; a=openpgp; fpr=93C6099A142276A28BBE35D815BC833443038D8C Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-ext4@vger.kernel.org Hello, So I have implemented mballoc improvements to avoid spreading allocations even with mb_optimize_scan=1. It fixes the performance regression I was able to reproduce with reaim on my test machine: mb_optimize_scan=0 mb_optimize_scan=1 patched Hmean disk-1 2076.12 ( 0.00%) 2099.37 ( 1.12%) 2032.52 ( -2.10%) Hmean disk-41 92481.20 ( 0.00%) 83787.47 * -9.40%* 90308.37 ( -2.35%) Hmean disk-81 155073.39 ( 0.00%) 135527.05 * -12.60%* 154285.71 ( -0.51%) Hmean disk-121 185109.64 ( 0.00%) 166284.93 * -10.17%* 185298.62 ( 0.10%) Hmean disk-161 229890.53 ( 0.00%) 207563.39 * -9.71%* 232883.32 * 1.30%* Hmean disk-201 223333.33 ( 0.00%) 203235.59 * -9.00%* 221446.93 ( -0.84%) Hmean disk-241 235735.25 ( 0.00%) 217705.51 * -7.65%* 239483.27 * 1.59%* Hmean disk-281 266772.15 ( 0.00%) 241132.72 * -9.61%* 263108.62 ( -1.37%) Hmean disk-321 265435.50 ( 0.00%) 245412.84 * -7.54%* 267277.27 ( 0.69%) Stefan, can you please test whether these patches fix the problem for you as well? Comments & review welcome. Honza