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 X-Spam-Level: X-Spam-Status: No, score=-6.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D111AC4321A for ; Fri, 26 Apr 2019 06:14:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9E6372077B for ; Fri, 26 Apr 2019 06:14:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726786AbfDZGOO (ORCPT ); Fri, 26 Apr 2019 02:14:14 -0400 Received: from mga17.intel.com ([192.55.52.151]:31371 "EHLO mga17.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726343AbfDZGOO (ORCPT ); Fri, 26 Apr 2019 02:14:14 -0400 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga107.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 25 Apr 2019 23:14:13 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.60,396,1549958400"; d="scan'208";a="340963864" Received: from yhuang-dev.sh.intel.com (HELO yhuang-dev) ([10.239.159.29]) by fmsmga006.fm.intel.com with ESMTP; 25 Apr 2019 23:14:12 -0700 From: "Huang\, Ying" To: Josef Bacik Cc: kernel test robot , David Sterba , Stephen Rothwell , "lkp\@01.org" , LKML , Qu Wenruo Subject: Re: [LKP] [btrfs] 302167c50b: fio.write_bw_MBps -12.4% regression References: <20190203081802.GD10498@shao2-debian> Date: Fri, 26 Apr 2019 14:14:11 +0800 In-Reply-To: <20190203081802.GD10498@shao2-debian> (kernel test robot's message of "Sun, 3 Feb 2019 16:18:02 +0800") Message-ID: <87h8alqong.fsf@yhuang-dev.intel.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=ascii Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi, Josef, kernel test robot writes: > Greeting, > > FYI, we noticed a -12.4% regression of fio.write_bw_MBps due to commit: > > > commit: 302167c50b32e7fccc98994a91d40ddbbab04e52 ("btrfs: don't end the transaction for delayed refs in throttle") > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git pending-fixes > > in testcase: fio-basic > on test machine: 88 threads Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz with 64G memory > with following parameters: > > runtime: 300s > nr_task: 8t > disk: 1SSD > fs: btrfs > rw: randwrite > bs: 4k > ioengine: sync > test_size: 400g > cpufreq_governor: performance > ucode: 0xb00002e > > test-description: Fio is a tool that will spawn a number of threads or processes doing a particular type of I/O action as specified by the user. > test-url: https://github.com/axboe/fio > > Do you have time to take a look at this regression? Best Regards, Huang, Ying