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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id EDB2EC77B75 for ; Tue, 9 May 2023 06:56:08 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 7CE5028000E; Tue, 9 May 2023 02:56:08 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 77DE5280001; Tue, 9 May 2023 02:56:08 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 5D11228000E; Tue, 9 May 2023 02:56:08 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 4ADD9280001 for ; Tue, 9 May 2023 02:56:08 -0400 (EDT) Received: from smtpin20.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id C19DB1A0A38 for ; Tue, 9 May 2023 06:56:07 +0000 (UTC) X-FDA: 80769807174.20.4D8253E Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by imf06.hostedemail.com (Postfix) with ESMTP id 1C71218000F for ; Tue, 9 May 2023 06:56:02 +0000 (UTC) Authentication-Results: imf06.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=Sf4cbh80; spf=pass (imf06.hostedemail.com: domain of fengwei.yin@intel.com designates 192.55.52.93 as permitted sender) smtp.mailfrom=fengwei.yin@intel.com; dmarc=pass (policy=none) header.from=intel.com; arc=reject ("signature check failed: fail, {[1] = sig:microsoft.com:reject}") ARC-Message-Signature: i=2; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1683615364; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=+jnrYXMuMqYHmeEeGi6bkCYD7MSnzz82xX/iiv0YpwI=; b=UXnuX+A+0PBTyS2/C004MScyEEgbOhvsgNAK+C5MlJaeYhKkAIgeJh7FlRvoAV9YQwc9Zy EzvoDQiCrx6DjwzKF61K4dHR1S2CdScRZ3GKKczhyvxYVLPnIG0WgAMjpNsE80TyaRUbwo n7BBMduFj9iLALCAgZLbXkQgcoqmz6s= ARC-Seal: i=2; s=arc-20220608; d=hostedemail.com; t=1683615364; a=rsa-sha256; cv=fail; b=g1ZMmFRZ2rJZZ2gubxAO23zc25E+Z2xUIMRMSNJ752pOyZOh8FPb47r1Sb9WYv7JtDGjpF MHeaB7d8dBZmcKxpD5NjzoqQGl9yC37ILh+ZyLew1yUtl/gXIPFgJFCnaiJBaCvFVNpdvM W6vYZ9DNsaFynPtcOciRORRoubzgBUE= ARC-Authentication-Results: i=2; imf06.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=Sf4cbh80; spf=pass (imf06.hostedemail.com: domain of fengwei.yin@intel.com designates 192.55.52.93 as permitted sender) smtp.mailfrom=fengwei.yin@intel.com; dmarc=pass (policy=none) header.from=intel.com; arc=reject ("signature check failed: fail, {[1] = sig:microsoft.com:reject}") DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1683615363; x=1715151363; h=message-id:date:subject:to:cc:references:from: in-reply-to:content-transfer-encoding:mime-version; bh=FTpw8i8WzY19esPBXIN9TcafXUPqQ0xRwZEIHmLPY9w=; b=Sf4cbh80U9xf0bwC9qRUum/7QxLMnAnQDBou6tMlf0WMrChLW2LrSMdQ 0sz52BGJ4s2kxfbbJ3QaMCNTwlo98ikz4vYGQqvi5dEn4DojGIwfvKdQM zDPGQ/vxy1D1tPypytNAl3kDI5my1i8/a0gou7gBs3l+YCK87jkavGyPr JI1/iqBUWyCVqfODTuC/k41KJetcFKvYLdSLXwvqZUfjAkIdshmcecbSv KhYRh7c7TVoGy9G3CsNB9wZt8GOKkbP2wCZtLWSGlQ5SM7PlkhDDCTceH +pNTn7eNgFdp9wHkjZeaZ+AJlGDXNwHdGp3qG0yszbrkTjlQRrFLeBfO3 g==; X-IronPort-AV: E=McAfee;i="6600,9927,10704"; a="347284372" X-IronPort-AV: E=Sophos;i="5.99,261,1677571200"; d="scan'208";a="347284372" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 May 2023 23:56:01 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10704"; a="945153336" X-IronPort-AV: E=Sophos;i="5.99,261,1677571200"; d="scan'208";a="945153336" Received: from orsmsx601.amr.corp.intel.com ([10.22.229.14]) by fmsmga006.fm.intel.com with ESMTP; 08 May 2023 23:56:00 -0700 Received: from orsmsx611.amr.corp.intel.com (10.22.229.24) by ORSMSX601.amr.corp.intel.com (10.22.229.14) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.23; Mon, 8 May 2023 23:56:00 -0700 Received: from orsmsx612.amr.corp.intel.com (10.22.229.25) by ORSMSX611.amr.corp.intel.com (10.22.229.24) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.23; Mon, 8 May 2023 23:55:59 -0700 Received: from ORSEDG602.ED.cps.intel.com (10.7.248.7) by orsmsx612.amr.corp.intel.com (10.22.229.25) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.23 via Frontend Transport; Mon, 8 May 2023 23:55:59 -0700 Received: from NAM12-MW2-obe.outbound.protection.outlook.com (104.47.66.40) by edgegateway.intel.com (134.134.137.103) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.23; Mon, 8 May 2023 23:55:58 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=C14Zd8cyk1NSFxO46YbRXS+UdoXppRWcZhyXFyLk53TRqgTlFueOq/pTQeb7Pp2y8PzhQ4OWT/a59W2670d3SrT4hMDLHsEH0yKzEOOmpzGvZG0zYxc1yjuMJYH0/ZW7voX6KWmKaV1xOdNNarU0jRJBO57hiYCmGN/vLU+ZdNHnU2whSlxr26SmF1CmXRzLvxgugZDRZwRp0VCw4ZH2Suowx14YydbDKrEivaOrQFHV19TaMOJieHgj5k+nDtwOhzsydoq1uRXY5Rpb03fTsmWs5jjwPYYl4OQ9pM02uTp+leAVGZGoK2EWGgC2U4D/qoXRfJwuy9A4gFu01Ug05w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=+jnrYXMuMqYHmeEeGi6bkCYD7MSnzz82xX/iiv0YpwI=; b=TSO0/vILrpPVHZYGA6bgs5Mnm2Ts2kN+JXIRY5p/W3pthOawWrnSn2oq4UEFl2Ar3ciIfI3JFj67XIyq452WUhJ6A1xPE8xS+I/RtJTD554xkWySP7xNiAsIHVYacOM9E0jt/G7u036lqGf0MDyqgcRNnM0kbNp5jZZg3UjcvlJ+xkvyzN3ZwtIxIPPt37+5Q06yVjWoICM+3SQduTrz52ctTBcTR8eanVc36gMa3ByTTDLx9WxPTFoWmBK9tC6c7OV/We920rcwlmtyo+jC0mFapobzaamCVSgk3wHANPQiCkJYI/vd0GEoDuiQvvJmRO0EWsLiFf0/GNxV5miSOA== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=intel.com; dmarc=pass action=none header.from=intel.com; dkim=pass header.d=intel.com; arc=none Received: from CO1PR11MB4820.namprd11.prod.outlook.com (2603:10b6:303:6f::8) by IA1PR11MB6268.namprd11.prod.outlook.com (2603:10b6:208:3e4::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6363.32; Tue, 9 May 2023 06:55:57 +0000 Received: from CO1PR11MB4820.namprd11.prod.outlook.com ([fe80::d1a0:743b:4659:b72]) by CO1PR11MB4820.namprd11.prod.outlook.com ([fe80::d1a0:743b:4659:b72%7]) with mapi id 15.20.6363.033; Tue, 9 May 2023 06:55:56 +0000 Message-ID: <57453f01-ac47-b683-7296-2e6b7275edd1@intel.com> Date: Tue, 9 May 2023 14:56:57 +0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Firefox/102.0 Thunderbird/102.10.0 Subject: Re: [linus:master] [mm/mmap] 28c5609fb2: aim9.page_test.ops_per_sec -10.8% regression Content-Language: en-US To: kernel test robot , Liam Howlett CC: , , , Andrew Morton , Yu Zhao , , , References: <202305061457.ac15990c-yujie.liu@intel.com> From: Yin Fengwei In-Reply-To: <202305061457.ac15990c-yujie.liu@intel.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-ClientProxiedBy: SG2PR06CA0210.apcprd06.prod.outlook.com (2603:1096:4:68::18) To CO1PR11MB4820.namprd11.prod.outlook.com (2603:10b6:303:6f::8) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PR11MB4820:EE_|IA1PR11MB6268:EE_ X-MS-Office365-Filtering-Correlation-Id: 2ded1066-e76b-45ac-921a-08db505a6fc5 X-LD-Processed: 46c98d88-e344-4ed4-8496-4ed7712e255d,ExtAddr X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:CO1PR11MB4820.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(136003)(366004)(376002)(396003)(39860400002)(346002)(451199021)(31686004)(54906003)(4326008)(2906002)(8936002)(478600001)(316002)(66476007)(5660300002)(66556008)(8676002)(41300700001)(110136005)(66899021)(66946007)(6486002)(966005)(6506007)(6512007)(53546011)(26005)(107886003)(186003)(82960400001)(2616005)(36756003)(83380400001)(38100700002)(31696002)(86362001)(43740500002)(45980500001);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?d2o5SWhpbFZaSG9aQU9VRllDNjIxcXpmK1gzZVY1NGtDMlBmNkNVQk1lWWtT?= =?utf-8?B?dzNXVGpmZ0QrSGRSc0lqUkIySXBQZkVHL0RZTHloL29Ub0gxMEw1Rmd6Nkt2?= =?utf-8?B?aWd0cnRJYzQ3NEttM2RuZG1LVDZ6ZENOL1cwOFZ3VDdhM2FjWDZEenZSYU95?= =?utf-8?B?V2lVUHNYcmRpK202aml4UWwwbkxwUkxBK2ZldTdWdEFMcTJkVXErZ2gwNjFh?= =?utf-8?B?bTdhanhMazNBRXhCa3BqUFVPdDZuUlR1ZjRsSTl1WXZiYUtnRnBkbnc0WEhw?= =?utf-8?B?eTVGZmd4M1V6M1VFMTdnR3h5TEJ1ZmxlTlZxb0RjdTNoek1WeXFoeFJOUHJv?= =?utf-8?B?YjFLM08wUGZMbXdQL1ZLYUpBVzQ3SG5iK2pKSndKZDFFeEZjdVhERC9OUFhl?= =?utf-8?B?WDk3a0UzZ1hsVFZmSDEzbEwyaUUyVjVndEFpY2RYeXdZQ1haU1RlSVdORkox?= =?utf-8?B?UXdLSW1iQXYyR1FlcWtYb1VJeXZqdUlaQ3Y1TTM4YmdKbmRsWk90eWlaREV2?= =?utf-8?B?cWF0ZFlHT2NSeTgzcDgrMWZQOXZmZ1U0WlR5ZkxtYzlyeUFxQXdpbmxTVWJR?= =?utf-8?B?ZTV2M2JYMndHK0cvN1ByUU91Q1h1SStIcU5COGhvRlE2NWxCbERjbTBSdUlv?= =?utf-8?B?M0tPMEJxUzc2SkVrTmJlUFl1ZUh0TjY2T1F6dURXN245M3lwbEdPZG1mc2g2?= =?utf-8?B?Y0F5MnFCbURNVDRXbENSazY1Z0ZaZjYrendxbU9aSEo3a2M1R0U5Vk5tZDZw?= =?utf-8?B?T3RhNW8vMDMyTTg3RkJVVmJ2VGRyUnV5RktTNnEvNVdHWWsrR0hpbkxqSXkx?= =?utf-8?B?RisxcWs2VXR0Y25sTUhhZ3FadXl1eUJua0N1QTJtNkRSMzV4c0xDek5yenlu?= =?utf-8?B?eVltbWc5OE1Ca01kUGF0UFlOUEpVSDNWanNDb2U0RWcrQXQvN1hZZFJFWSto?= =?utf-8?B?aXZOcWR6cUVPODJJUkRsMWdIak84NkpQSUcwZWdMLzRDeWxRWXJxazY4V2Zy?= =?utf-8?B?R1dlK0pRcmxtbnFkeG1MMUlrSHV4UDdtQ0VBczV5OU1KTzZqL2Yzdzg5UFFi?= =?utf-8?B?L0VBUG9nUHFsMDV0eGw5NVp5R0lVTXQ4M2xTR3ducU5QWFh1RW55SUJFS2hi?= =?utf-8?B?UzRvVVNSYXgwZER3bzdadTJKT25PbnRPc2ZzMGNPd0s1MmJISlpyUUN5TDJZ?= =?utf-8?B?NTlGaDJaTTgrZ21aZHJ0M2Ywc0xoa3duNXhKZVd0NmlmaDhUbHlPRm5aRWJI?= =?utf-8?B?VU1LUDN1MUtTNlUzZEhOMmlpalhtaHJFZ0NnMklrWUo5TkNoVUcvY1UvRjdu?= =?utf-8?B?UmQzWUttaVJiWFJYMy9EVXVucjQ4UkRxNGF3NXVxVzJMVkxXWmd2UlZkcnBQ?= =?utf-8?B?RVpSS1hubG5IRU53cUJEMXJCcndRc3FyWENJMXljRU9Helo2Vy9GWEp0eEtq?= =?utf-8?B?RjBTVUhzdVY4RnNZck1WRmtNNzZKVkNpcktEWHlqb1ZMYzROOTRSdUxtYjF5?= =?utf-8?B?NlZWVHRWMlQzQ05rOTJQTkVvNzUwTnhRTEdBMklEd3lMWXVEbHJuV2sybER1?= =?utf-8?B?eUtoOTd1V1huSjM0ZFJIVytZR2J5dnZmeW9MZkJQVU94eVdMQ21TcWZHSDRp?= =?utf-8?B?YlJqYjBMZDY4QzExTjM0aFpKblltcGV2N0htZFhkUEgweFN2cU1mUjZ4Njk4?= =?utf-8?B?enJnc1pkYVBUaFB2TTZFUjhYWi9VajBHakpKbGhKODBkL3J3VFFUcEloM0Fo?= =?utf-8?B?K09yVFVmRHMyRnZkbjQvK0hHZEFVMC9CZkRPZ000VUFBeUhnNlp1MjlLM04x?= =?utf-8?B?TjZ6MnEyTkJjWG9XTVMxeitpS25xdkpteDFjdENMYWNTVmdtY0NGNkptNW80?= =?utf-8?B?eDlMQ0dZWUJvcGtIUG5JQm9UZVhINVRMd0FNOFdqYU80eXVEWUtTNktMZmwv?= =?utf-8?B?ZlZib0NpSFRjRTBDT1hUbTJMUTlrVFdOSnFIMm1mVVh0V0tGU05RUEh6QzhI?= =?utf-8?B?ZnB4L1NJQkUvcEwzS1ZBaWwyQ2lBSnlmMEEzMDg5cGVxRlVoRkdnKzd0VTA0?= =?utf-8?B?NnNtb05vRXU0ejdDeis1M3ZoZlhuRGhaeUxFbEVTOExQOUF6Qkkyc2ZueEQ2?= =?utf-8?Q?ogSevF7DbWw4fGVUAWJggbBsA?= X-MS-Exchange-CrossTenant-Network-Message-Id: 2ded1066-e76b-45ac-921a-08db505a6fc5 X-MS-Exchange-CrossTenant-AuthSource: CO1PR11MB4820.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 09 May 2023 06:55:55.8875 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 7X3wvg0v3rMiWBm7sydUc1NlXEpFMz8ycVmgkvsmfU5vpMI40U1qdOmVVy2wJPvayufQ4ulJ90NmFhw1Q8149w== X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR11MB6268 X-OriginatorOrg: intel.com X-Rspamd-Queue-Id: 1C71218000F X-Stat-Signature: y5mteiszd7thujrwft5qq3pyipq3mzj3 X-Rspam-User: X-Rspamd-Server: rspam09 X-HE-Tag: 1683615362-461229 X-HE-Meta: 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 wMQFTAK5 EmqB1ts/06FCo8DLfxKUoVhBgeWhZ+kIo96eC2O6G0wg2vYxZVE/JUWcDECqJ5E8xKs6Mi80fZvLwhl7EeuegAiW01jjkWVaR14/vDmNLEyvWqDPZQPrMC2MXQqF1MK6rTfGqRiojwG+1qVRA0Fj9axxu5CQ+baUS2VhhzyMWqzd3SaSGW+vV1EDli1Z0tRxhUF8NkNFGSYq18ecyG5UsHMRB/gW49ZiXcXwCAKL0e79p7lkvoGtQfPlQhrDLVlKIgCIauYF4rLERAXfdc7WjkHCbt4EX+8Ms6lVNo3TEe2BfPQlb+qh9R0HXIPsJX+8OXeoC+scb8BKRK1Zv4sqVHjMAQ4TWDQxfjq/NcpLMsVramaHfgXOWWMhjNa6u4HscQZ0ej/RPDQj89AW74eZDKWGh+g== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Hi Liam, On 5/6/23 14:20, kernel test robot wrote: > Hello, > > kernel test robot noticed a -10.8% regression of aim9.page_test.ops_per_sec on: > > commit: 28c5609fb236807910ca347ad3e26c4567998526 ("mm/mmap: preallocate maple nodes for brk vma expansion") > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master > > testcase: aim9 > test machine: 48 threads 2 sockets Intel(R) Xeon(R) CPU E5-2697 v2 @ 2.70GHz (Ivy Bridge-EP) with 112G memory > parameters: > > testtime: 5s > test: all > cpufreq_governor: performance > > If you fix the issue, kindly add following tag > | Reported-by: kernel test robot > | Link: https://lore.kernel.org/oe-lkp/202305061457.ac15990c-yujie.liu@intel.com > Some finding related: eBPF funclatency tool says the latency of function do_brk_flags() doubles with the patch 28c5609fb2. With the patch 28c5609fb2, the mas_alloc_nodes() is called much more than without the patch. In my local debugging env, I can see around 17009999 times call to mas_alloc_nodes(). The number is zero without the patch 28c5609fb2. So we are kind of sure the regression is connected to the patch. The page_test of AIM9 is doing following work with single thread: newbrk = sbrk(1024 * 1024); /* move up 1 megabyte */ while (true) { /* while not done */ newbrk = sbrk(-4096 * 16); /* deallocate some space */ for (i = 0; i < 16; i++) { /* now get it back in pieces */ newbrk = sbrk(4096); /* Get pointer to new space */ } } Is it possible that the sbrk pattern triggers the corner case? Thanks. Regards Yin, Fengwei