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 3CE33C001DE for ; Mon, 31 Jul 2023 07:29:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230036AbjGaH3Y (ORCPT ); Mon, 31 Jul 2023 03:29:24 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36224 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229479AbjGaH1R (ORCPT ); Mon, 31 Jul 2023 03:27:17 -0400 Received: from out28-225.mail.aliyun.com (out28-225.mail.aliyun.com [115.124.28.225]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DDA951BDC for ; Mon, 31 Jul 2023 00:23:56 -0700 (PDT) X-Alimail-AntiSpam: AC=SUSPECT;BC=0.6218966|-1;BR=01201311R201b1;CH=blue;DM=|SUSPECT|false|;DS=CONTINUE|ham_news_journal|0.585828-1.57954e-05-0.414156;FP=0|0|0|0|0|-1|-1|-1;HT=ay29a033018047192;MF=wangyugui@e16-tech.com;NM=1;PH=DS;RN=1;RT=1;SR=0;TI=SMTPD_---.U4dYX0i_1690788143; Received: from 192.168.2.112(mailfrom:wangyugui@e16-tech.com fp:SMTPD_---.U4dYX0i_1690788143) by smtp.aliyun-inc.com; Mon, 31 Jul 2023 15:22:27 +0800 Date: Mon, 31 Jul 2023 15:22:28 +0800 From: Wang Yugui To: linux-btrfs@vger.kernel.org Subject: btrfs write-bandwidth performance regression of 6.5-rc4/rc3 Message-Id: <20230731152223.4EFB.409509F4@e16-tech.com> MIME-Version: 1.0 Content-Type: text/plain; charset="GB2312" Content-Transfer-Encoding: 8bit X-Mailer: Becky! ver. 2.81.04 [en] Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Hi, I noticed a btrfs write-bandwidth performance regression of 6.5-rc4/rc3 with the compare to btrfs 6.4.0 test case: disk: NVMe PCIe3 SSD *4 btrfs: -m raid -d raid0 fio -name write-bandwidth -rw=write -bs=1024Ki -size=32Gi -runtime=30 -iodepth 1 -ioengine sync -zero_buffers=1 -direct=0 -end_fsync=1 -numjobs=4 -directory=/mnt/test 6.5-rc4/rc3 fio(-numjobs=4) WRITE: bw=1512MiB/s (1586MB/s) but ¡®dd conv=fsync¡¯ works well, 2.1 GiB/s. 6.4.0 fio(-numjobs=4) WRITE: bw=4147MiB/s (4349MB/s) 'git bisect' between 6.4 and 6.5 is yet not done. Best Regards Wang Yugui (wangyugui@e16-tech.com) 2023/07/31