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=-2.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 D7207C2BA19 for ; Mon, 13 Apr 2020 08:43:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A760B206E9 for ; Mon, 13 Apr 2020 08:43:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728363AbgDMITQ (ORCPT ); Mon, 13 Apr 2020 04:19:16 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.18]:42700 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727971AbgDMITO (ORCPT ); Mon, 13 Apr 2020 04:19:14 -0400 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 699F1C00860B for ; Mon, 13 Apr 2020 01:19:14 -0700 (PDT) IronPort-SDR: YHSj5ES432f/mAs2Hv5AV/UQCXPr0hiV3x2UDkpqiuWWuJFmCptnsccBjAcJwGqAlt2YZWiqAY Y2bTMahmft4A== X-Amp-Result: UNKNOWN X-Amp-Original-Verdict: FILE UNKNOWN X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 13 Apr 2020 01:19:13 -0700 IronPort-SDR: xpFBVXMksRbqrWtgafP/j1YD8Xl1CEayw09shA+pmV9XFahtg8PJsY1zlGl2KZulP08TdRm/sz zuIvbOYomwig== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.72,378,1580803200"; d="txt'?scan'208";a="426619258" Received: from xingzhen-mobl1.ccr.corp.intel.com (HELO [10.238.5.222]) ([10.238.5.222]) by orsmga005.jf.intel.com with ESMTP; 13 Apr 2020 01:19:11 -0700 Subject: Re: [LKP] [btrfs] 8d47a0d8f7: fio.write_bw_MBps -28.6% regression To: dsterba@suse.cz, Qu Wenruo , kernel test robot , David Sterba , Linus Torvalds , Leonard Lausen , LKML , lkp@01.org References: <20190513031733.GI31424@shao2-debian> <20200410101406.GI5920@suse.cz> From: Xing Zhengjun Message-ID: <5816c503-e4d3-0b8b-4e89-a817d0b57851@linux.intel.com> Date: Mon, 13 Apr 2020 16:19:10 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <20200410101406.GI5920@suse.cz> Content-Type: multipart/mixed; boundary="------------669AD32897F11BCD272E286F" Content-Language: en-US Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This is a multi-part message in MIME format. --------------669AD32897F11BCD272E286F Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit This regression happened on "lkp-hsw-ep2", but “lkp-hsw-ep2” has been removed from the LKP tbox, so we retest the regression on another tbox “lkp-hsw-ep4”, their hardware is almost the same, "72 threads Intel(R) Xeon(R) CPU E5-2699 v3 @ 2.30GHz with 256G memory". The test result is in the attached file compare.txt. The regression is -6.7% for v5.6, the origin regression is -8.9%, it is not serious as it test on "lkp-hsw-ep2" before. On 4/10/2020 6:14 PM, David Sterba wrote: > On Fri, Apr 10, 2020 at 02:44:55PM +0800, Qu Wenruo wrote: >> On 2020/4/10 下午2:34, Xing Zhengjun wrote: >>> Hi Wenruo, >>> >>>    We test it in v5.6, the issue still exist, do you have time to take a >>> look at this? Thanks. >> >> This is expected. >> >> The extra check brings new overhead mostly equal to another CRC32 run. >> >> We believe it's worthy, as our read time tree checker has exposed quite >> some bit flip corruption. > > The test probably runs on a PMEM device so there's no slowdown from the > actual IO and the in-memory checks are measurable, though 28% is a lot, > I'd expect something like 5-10% at most. > -- Zhengjun Xing --------------669AD32897F11BCD272E286F Content-Type: text/plain; charset=UTF-8; name="compare.txt" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="compare.txt" PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KdGJveF9ncm91cC90ZXN0Y2Fz ZS9yb290ZnMva2NvbmZpZy9jb21waWxlci9kZWJ1Zy1zZXR1cC9kaXNrL2ZzL3J1bnRpbWUv bnJfdGFzay90aW1lX2Jhc2VkL3J3L2JzL2lvZW5naW5lL3Rlc3Rfc2l6ZS9jcHVmcmVxX2dv dmVybm9yL3Vjb2RlOgogIGxrcC1oc3ctZXA0L2Zpby1iYXNpYy9kZWJpYW4teDg2XzY0LTIw MTkxMTE0LmNnei94ODZfNjQtcmhlbC03LjYvZ2NjLTcvdGVzdC8ycG1lbS9idHJmcy8yMDBz LzUwJS90Yi9yYW5kd3JpdGUvNGsvbGliYWlvLzEwMEcvcGVyZm9ybWFuY2UvMHg0MwoKY29t bWl0OiAKICBmZjJhYzEwN2ZhZTI0NDBiNjg3N2M2MTVjMGFjNzg4ZDJhMTA2ZWQ3CiAgOGQ0 N2EwZDhmNzk0NzQyMmRkMzU5YWM4ZTQ2MjY4N2Y4MWE3YTEzNwogIHY1LjYKCmZmMmFjMTA3 ZmFlMjQ0MGIgOGQ0N2EwZDhmNzk0NzQyMmRkMzU5YWM4ZTQ2ICAgICAgICAgICAgICAgICAg ICAgICAgdjUuNiAKLS0tLS0tLS0tLS0tLS0tLSAtLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0gLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tIAogICAgICAgICAlc3RkZGV2ICAgICAl Y2hhbmdlICAgICAgICAgJXN0ZGRldiAgICAgJWNoYW5nZSAgICAgICAgICVzdGRkZXYKICAg ICAgICAgICAgIFwgICAgICAgICAgfCAgICAgICAgICAgICAgICBcICAgICAgICAgIHwgICAg ICAgICAgICAgICAgXCAgCiAgICAgIDAuNDQgwrEgIDclICAgICAgLTAuMSAgICAgICAgMC4z MiDCsSAgNCUgICAgICAtMC4xICAgICAgICAwLjM2IMKxIDEwJSAgZmlvLmxhdGVuY3lfMTAw MG1zJQogICAgICAwLjE2IMKxIDExJSAgICAgIC0wLjEgICAgICAgIDAuMDMgwrEgMjUlICAg ICAgLTAuMSAgICAgICAgMC4wMiDCsSAgOCUgIGZpby5sYXRlbmN5XzEwMG1zJQogICAgICA1 LjU5IMKxICAzJSAgICAgIC0wLjAgICAgICAgIDUuNTkgwrEgIDklICAgICAgKzUuNyAgICAg ICAxMS4yNiDCsSAxNSUgIGZpby5sYXRlbmN5XzEwbXMlCiAgICAgMzguMjUgICAgICAgICAg ICArMS43ICAgICAgIDM5LjkyIMKxICAzJSAgICAgICs0LjcgICAgICAgNDIuOTcgICAgICAg IGZpby5sYXRlbmN5XzIwbXMlCiAgICAgIDAuMjkgwrEgIDQlICAgICAgLTAuMSAgICAgICAg MC4xNiDCsSAgMiUgICAgICAtMC4yICAgICAgICAwLjA2IMKxIDE0JSAgZmlvLmxhdGVuY3lf MjUwbXMlCiAgICAgIDAuNTggwrEgMTclICAgICAgKzAuMSAgICAgICAgMC42NiDCsSAxMCUg ICAgICAtMC41ICAgICAgICAwLjA4IMKxICA2JSAgZmlvLmxhdGVuY3lfMjUwdXMlCiAgICAg IDAuMTcgwrEgNDMlICAgICAgKzAuMSAgICAgICAgMC4yNCDCsSAzNCUgICAgICArMC4yICAg ICAgICAwLjQwIMKxIDMwJSAgZmlvLmxhdGVuY3lfMm1zJQogICAgIDQ0LjI0ICAgICAgICAg ICAgLTQuMyAgICAgICAzOS45NSAgICAgICAgICAgIC00LjIgICAgICAgMzkuOTkgwrEgIDMl ICBmaW8ubGF0ZW5jeV80bXMlCiAgICAgIDAuMDMgwrEgIDQlICAgICAgKzAuMiAgICAgICAg MC4xOSDCsSAgMyUgICAgICArMC4xICAgICAgICAwLjE2IMKxIDEwJSAgZmlvLmxhdGVuY3lf NTAwbXMlCiAgICAgIDguNTYgwrEgIDQlICAgICAgKzIuNyAgICAgICAxMS4zMCDCsSAgOCUg ICAgICAtNi4yICAgICAgICAyLjM1IMKxICA1JSAgZmlvLmxhdGVuY3lfNTBtcyUKICAgICAg MC4wMyDCsSAyNCUgICAgICArMC4yICAgICAgICAwLjI4ICAgICAgICAgICAgKzAuNCAgICAg ICAgMC40NSDCsSAgMiUgIGZpby5sYXRlbmN5Xzc1MG1zJQogICAgICAwLjExIMKxIDM4JSAg ICAgIC0wLjAgICAgICAgIDAuMTAgwrEgMzElICAgICAgKzAuMyAgICAgICAgMC40MSDCsSAz MyUgIGZpby5sYXRlbmN5Xzc1MHVzJQogIDEzNjgyNzEzICAgICAgICAgICAgLTkuMCUgICAx MjQ1NzExOCAgICAgICAgICAgIC02LjclICAgMTI3NjQ4MjcgICAgICAgIGZpby53b3JrbG9h ZAogICAgMjY2LjM2ICAgICAgICAgICAgLTguOSUgICAgIDI0Mi43MCAgICAgICAgICAgIC02 LjUlICAgICAyNDguOTkgICAgICAgIGZpby53cml0ZV9id19NQnBzCiAgMTk5NjY2MzQgICAg ICAgICAgICArMy4xJSAgIDIwNTc4MzA0ICAgICAgICAgICAgLTkuMiUgICAxODEzMTYyNiAg ICAgICAgZmlvLndyaXRlX2NsYXRfOTAlX3VzCiAgMjE5NzY0MDUgICAgICAgICAgICArMy4y JSAgIDIyNjc1NDU2ICAgICAgICAgICAtMTIuMyUgICAxOTI2NzU4NCAgICAgICAgZmlvLndy aXRlX2NsYXRfOTUlX3VzCiAgOTI3OTg5NzYgwrEgIDUlICAgICsxMjQuMSUgICAyLjA4ZSsw OCDCsSAgMyUgICAgKzM3NS4zJSAgNC40MTFlKzA4IMKxICAyJSAgZmlvLndyaXRlX2NsYXRf OTklX3VzCiAgMTYzNTMzMDQgICAgICAgICAgICArOS43JSAgIDE3OTQyOTQyICAgICAgICAg ICAgKzcuMCUgICAxNzUwMDc4OSAgICAgICAgZmlvLndyaXRlX2NsYXRfbWVhbl91cwogIDc2 ODI4NzMyICAgICAgICAgICAgKzAuNCUgICA3NzEzMjkxMSAgICAgICAgICAgICs2LjklICAg ODIxMzU0MjQgwrEgIDIlICBmaW8ud3JpdGVfY2xhdF9zdGRkZXYKICAgICA2ODE4OCAgICAg ICAgICAgIC04LjklICAgICAgNjIxMzEgICAgICAgICAgICAtNi41JSAgICAgIDYzNzQwICAg ICAgICBmaW8ud3JpdGVfaW9wcwogICAgNTIzNDA2ICAgICAgICAgICAgKzkuNyUgICAgIDU3 NDQwMCAgICAgICAgICAgICs3LjAlICAgICA1NjAyNjAgICAgICAgIGZpby53cml0ZV9zbGF0 X21lYW5fdXMKICAxMzY0OTkxOSAgICAgICAgICAgIC0zLjglICAgMTMxMzM0NzEgICAgICAg ICAgICArNy45JSAgIDE0NzI5NzAzICAgICAgICBmaW8ud3JpdGVfc2xhdF9zdGRkZXYKCg== --------------669AD32897F11BCD272E286F-- From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: multipart/mixed; boundary="===============1881888550593868817==" MIME-Version: 1.0 From: Xing Zhengjun To: lkp@lists.01.org Subject: Re: [btrfs] 8d47a0d8f7: fio.write_bw_MBps -28.6% regression Date: Mon, 13 Apr 2020 08:20:04 +0000 Message-ID: <5816c503-e4d3-0b8b-4e89-a817d0b57851@linux.intel.com> In-Reply-To: <20200410101406.GI5920@suse.cz> List-Id: --===============1881888550593868817== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable This regression happened on "lkp-hsw-ep2", but =E2=80=9Clkp-hsw-ep2=E2=80= =9D has been = removed from the LKP tbox, so we retest the regression on another tbox = =E2=80=9Clkp-hsw-ep4=E2=80=9D, their hardware is almost the same, "72 threa= ds Intel(R) = Xeon(R) CPU E5-2699 v3 @ 2.30GHz with 256G memory". The test result is = in the attached file compare.txt. The regression is -6.7% for v5.6, the = origin regression is -8.9%, it is not serious as it test on = "lkp-hsw-ep2" before. On 4/10/2020 6:14 PM, David Sterba wrote: > On Fri, Apr 10, 2020 at 02:44:55PM +0800, Qu Wenruo wrote: >> On 2020/4/10 =E4=B8=8B=E5=8D=882:34, Xing Zhengjun wrote: >>> Hi Wenruo, >>> >>> =C2=A0=C2=A0 We test it in v5.6, the issue still exist, do you have ti= me to take a >>> look at this? Thanks. >> >> This is expected. >> >> The extra check brings new overhead mostly equal to another CRC32 run. >> >> We believe it's worthy, as our read time tree checker has exposed quite >> some bit flip corruption. > = > The test probably runs on a PMEM device so there's no slowdown from the > actual IO and the in-memory checks are measurable, though 28% is a lot, > I'd expect something like 5-10% at most. > = -- = Zhengjun Xing --===============1881888550593868817== Content-Type: text/plain MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="compare.txt" PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT0KdGJveF9ncm91cC90ZXN0Y2FzZS9yb290 ZnMva2NvbmZpZy9jb21waWxlci9kZWJ1Zy1zZXR1cC9kaXNrL2ZzL3J1bnRpbWUvbnJfdGFzay90 aW1lX2Jhc2VkL3J3L2JzL2lvZW5naW5lL3Rlc3Rfc2l6ZS9jcHVmcmVxX2dvdmVybm9yL3Vjb2Rl OgogIGxrcC1oc3ctZXA0L2Zpby1iYXNpYy9kZWJpYW4teDg2XzY0LTIwMTkxMTE0LmNnei94ODZf NjQtcmhlbC03LjYvZ2NjLTcvdGVzdC8ycG1lbS9idHJmcy8yMDBzLzUwJS90Yi9yYW5kd3JpdGUv NGsvbGliYWlvLzEwMEcvcGVyZm9ybWFuY2UvMHg0MwoKY29tbWl0OiAKICBmZjJhYzEwN2ZhZTI0 NDBiNjg3N2M2MTVjMGFjNzg4ZDJhMTA2ZWQ3CiAgOGQ0N2EwZDhmNzk0NzQyMmRkMzU5YWM4ZTQ2 MjY4N2Y4MWE3YTEzNwogIHY1LjYKCmZmMmFjMTA3ZmFlMjQ0MGIgOGQ0N2EwZDhmNzk0NzQyMmRk MzU5YWM4ZTQ2ICAgICAgICAgICAgICAgICAgICAgICAgdjUuNiAKLS0tLS0tLS0tLS0tLS0tLSAt LS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0gLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tIAog ICAgICAgICAlc3RkZGV2ICAgICAlY2hhbmdlICAgICAgICAgJXN0ZGRldiAgICAgJWNoYW5nZSAg ICAgICAgICVzdGRkZXYKICAgICAgICAgICAgIFwgICAgICAgICAgfCAgICAgICAgICAgICAgICBc ICAgICAgICAgIHwgICAgICAgICAgICAgICAgXCAgCiAgICAgIDAuNDQgwrEgIDclICAgICAgLTAu MSAgICAgICAgMC4zMiDCsSAgNCUgICAgICAtMC4xICAgICAgICAwLjM2IMKxIDEwJSAgZmlvLmxh dGVuY3lfMTAwMG1zJQogICAgICAwLjE2IMKxIDExJSAgICAgIC0wLjEgICAgICAgIDAuMDMgwrEg MjUlICAgICAgLTAuMSAgICAgICAgMC4wMiDCsSAgOCUgIGZpby5sYXRlbmN5XzEwMG1zJQogICAg ICA1LjU5IMKxICAzJSAgICAgIC0wLjAgICAgICAgIDUuNTkgwrEgIDklICAgICAgKzUuNyAgICAg ICAxMS4yNiDCsSAxNSUgIGZpby5sYXRlbmN5XzEwbXMlCiAgICAgMzguMjUgICAgICAgICAgICAr MS43ICAgICAgIDM5LjkyIMKxICAzJSAgICAgICs0LjcgICAgICAgNDIuOTcgICAgICAgIGZpby5s YXRlbmN5XzIwbXMlCiAgICAgIDAuMjkgwrEgIDQlICAgICAgLTAuMSAgICAgICAgMC4xNiDCsSAg MiUgICAgICAtMC4yICAgICAgICAwLjA2IMKxIDE0JSAgZmlvLmxhdGVuY3lfMjUwbXMlCiAgICAg IDAuNTggwrEgMTclICAgICAgKzAuMSAgICAgICAgMC42NiDCsSAxMCUgICAgICAtMC41ICAgICAg ICAwLjA4IMKxICA2JSAgZmlvLmxhdGVuY3lfMjUwdXMlCiAgICAgIDAuMTcgwrEgNDMlICAgICAg KzAuMSAgICAgICAgMC4yNCDCsSAzNCUgICAgICArMC4yICAgICAgICAwLjQwIMKxIDMwJSAgZmlv LmxhdGVuY3lfMm1zJQogICAgIDQ0LjI0ICAgICAgICAgICAgLTQuMyAgICAgICAzOS45NSAgICAg ICAgICAgIC00LjIgICAgICAgMzkuOTkgwrEgIDMlICBmaW8ubGF0ZW5jeV80bXMlCiAgICAgIDAu MDMgwrEgIDQlICAgICAgKzAuMiAgICAgICAgMC4xOSDCsSAgMyUgICAgICArMC4xICAgICAgICAw LjE2IMKxIDEwJSAgZmlvLmxhdGVuY3lfNTAwbXMlCiAgICAgIDguNTYgwrEgIDQlICAgICAgKzIu NyAgICAgICAxMS4zMCDCsSAgOCUgICAgICAtNi4yICAgICAgICAyLjM1IMKxICA1JSAgZmlvLmxh dGVuY3lfNTBtcyUKICAgICAgMC4wMyDCsSAyNCUgICAgICArMC4yICAgICAgICAwLjI4ICAgICAg ICAgICAgKzAuNCAgICAgICAgMC40NSDCsSAgMiUgIGZpby5sYXRlbmN5Xzc1MG1zJQogICAgICAw LjExIMKxIDM4JSAgICAgIC0wLjAgICAgICAgIDAuMTAgwrEgMzElICAgICAgKzAuMyAgICAgICAg MC40MSDCsSAzMyUgIGZpby5sYXRlbmN5Xzc1MHVzJQogIDEzNjgyNzEzICAgICAgICAgICAgLTku MCUgICAxMjQ1NzExOCAgICAgICAgICAgIC02LjclICAgMTI3NjQ4MjcgICAgICAgIGZpby53b3Jr bG9hZAogICAgMjY2LjM2ICAgICAgICAgICAgLTguOSUgICAgIDI0Mi43MCAgICAgICAgICAgIC02 LjUlICAgICAyNDguOTkgICAgICAgIGZpby53cml0ZV9id19NQnBzCiAgMTk5NjY2MzQgICAgICAg ICAgICArMy4xJSAgIDIwNTc4MzA0ICAgICAgICAgICAgLTkuMiUgICAxODEzMTYyNiAgICAgICAg ZmlvLndyaXRlX2NsYXRfOTAlX3VzCiAgMjE5NzY0MDUgICAgICAgICAgICArMy4yJSAgIDIyNjc1 NDU2ICAgICAgICAgICAtMTIuMyUgICAxOTI2NzU4NCAgICAgICAgZmlvLndyaXRlX2NsYXRfOTUl X3VzCiAgOTI3OTg5NzYgwrEgIDUlICAgICsxMjQuMSUgICAyLjA4ZSswOCDCsSAgMyUgICAgKzM3 NS4zJSAgNC40MTFlKzA4IMKxICAyJSAgZmlvLndyaXRlX2NsYXRfOTklX3VzCiAgMTYzNTMzMDQg ICAgICAgICAgICArOS43JSAgIDE3OTQyOTQyICAgICAgICAgICAgKzcuMCUgICAxNzUwMDc4OSAg ICAgICAgZmlvLndyaXRlX2NsYXRfbWVhbl91cwogIDc2ODI4NzMyICAgICAgICAgICAgKzAuNCUg ICA3NzEzMjkxMSAgICAgICAgICAgICs2LjklICAgODIxMzU0MjQgwrEgIDIlICBmaW8ud3JpdGVf Y2xhdF9zdGRkZXYKICAgICA2ODE4OCAgICAgICAgICAgIC04LjklICAgICAgNjIxMzEgICAgICAg ICAgICAtNi41JSAgICAgIDYzNzQwICAgICAgICBmaW8ud3JpdGVfaW9wcwogICAgNTIzNDA2ICAg ICAgICAgICAgKzkuNyUgICAgIDU3NDQwMCAgICAgICAgICAgICs3LjAlICAgICA1NjAyNjAgICAg ICAgIGZpby53cml0ZV9zbGF0X21lYW5fdXMKICAxMzY0OTkxOSAgICAgICAgICAgIC0zLjglICAg MTMxMzM0NzEgICAgICAgICAgICArNy45JSAgIDE0NzI5NzAzICAgICAgICBmaW8ud3JpdGVfc2xh dF9zdGRkZXYKCg== --===============1881888550593868817==--