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 94587EDE989 for ; Fri, 15 Sep 2023 02:40:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231723AbjIOCkj (ORCPT ); Thu, 14 Sep 2023 22:40:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51922 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230512AbjIOCkh (ORCPT ); Thu, 14 Sep 2023 22:40:37 -0400 Received: from NAM10-DM6-obe.outbound.protection.outlook.com (mail-dm6nam10on2095.outbound.protection.outlook.com [40.107.93.95]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 023A726AB for ; Thu, 14 Sep 2023 19:40:32 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=g5AcEQAks25Xyu2g/qHVGgR9xKuDF5EYl9pRX3/ooRYQSVbgkz3nL8bnPFuvBGOW0uEixP8lVhmRBREpVAMM2RZWFiJUFQG6Do/bNPDsSeG4yPV5XC1tWBa7dYJNWBn6QIzTntHXH7fZjt2/qCpBgNmt6QmLByLZTI8ae4JoVqm1tGVww7LAwBpNktqFUG494J4ZG9WENO67y4J6urY8q6iTU23XMEl4SzXFKQcfxxp3CarFZ/9T575xw904nf3HBeNyAo9NWJDucYP0HGXHFMQxVz/UF402eGFBeQNe02Qc5um9rfembvJc4mURcJrPQAKkTRbQf88CWGvzKX/qjg== 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=aEAg1tDQUaAJnpY7k0n2nvYWHLiQzAvDJlUHQxkf6R4=; b=Pv/qovqoTIXi1Q+DpEsHB7zue/2Z5RbU0TksH8JFVDS180/EVrCni4UzvE0wK4V/7ibdaB4jBkFsSBl6cvR09rF6Je8kR9KnrRd+EGskwS+KRJTJ8C5F+hCtGajGw9qDXyKHE9b+gsAnwumvBajiS02eyQpoDW0sgqwaJkbqOIC4flZ8TQHwRAy0s7+hzWRwHUu4CYbAKA5Bp8Tuuu2N8zbSaMVCujfx7YLr/mgVP7dWiq2itaIdTZBiET5ZCbmLAjI40ZJ6VfEynRIXDa52uedVGk2iI8OlpvKJC9pmJ04eVg0q9GqzlyHOTjYhbPpqmEj29S/v19wDSS5CK0qkkw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=os.amperecomputing.com; dmarc=pass action=none header.from=os.amperecomputing.com; dkim=pass header.d=os.amperecomputing.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=os.amperecomputing.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=aEAg1tDQUaAJnpY7k0n2nvYWHLiQzAvDJlUHQxkf6R4=; b=S+J/rNDvNaORGIBs91P7MG4Jz4KngZHYKHIrE8mayKWvKcPVxqEZiq7zSPeo3XI7TmYUzbacXqp+IbB+tHrgkZOMIa/2QHKhL+sQf0mY062w2PkNnAHPiMwAuWoZAhpg4bZ+LQJR3Yq6PzOp2t1bM9STPVY3pwcO1u03RLts5R0= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=os.amperecomputing.com; Received: from DM6PR01MB5259.prod.exchangelabs.com (2603:10b6:5:68::27) by PH0PR01MB6151.prod.exchangelabs.com (2603:10b6:510:18::7) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6768.38; Fri, 15 Sep 2023 02:40:29 +0000 Received: from DM6PR01MB5259.prod.exchangelabs.com ([fe80::66e5:a568:4a5b:c19a]) by DM6PR01MB5259.prod.exchangelabs.com ([fe80::66e5:a568:4a5b:c19a%6]) with mapi id 15.20.6768.036; Fri, 15 Sep 2023 02:40:28 +0000 Date: Thu, 14 Sep 2023 19:40:22 -0700 (PDT) From: "Lameter, Christopher" To: Feng Tang cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>, Vlastimil Babka , Andrew Morton , Pekka Enberg , David Rientjes , Joonsoo Kim , Roman Gushchin , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [RFC Patch 3/3] mm/slub: setup maxim per-node partial according to cpu numbers In-Reply-To: Message-ID: <21a0ba8b-bf05-0799-7c78-2a35f8c8d52a@os.amperecomputing.com> References: <20230905141348.32946-1-feng.tang@intel.com> <20230905141348.32946-4-feng.tang@intel.com> Content-Type: text/plain; charset=US-ASCII; format=flowed X-ClientProxiedBy: CH0PR13CA0039.namprd13.prod.outlook.com (2603:10b6:610:b2::14) To DM6PR01MB5259.prod.exchangelabs.com (2603:10b6:5:68::27) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6PR01MB5259:EE_|PH0PR01MB6151:EE_ X-MS-Office365-Filtering-Correlation-Id: 619f18a9-a364-4992-c36f-08dbb5951f39 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:DM6PR01MB5259.prod.exchangelabs.com;PTR:;CAT:NONE;SFS:(13230031)(346002)(376002)(136003)(39850400004)(366004)(396003)(1800799009)(186009)(451199024)(5660300002)(478600001)(41300700001)(316002)(8936002)(8676002)(2616005)(26005)(86362001)(31696002)(4326008)(6916009)(54906003)(83380400001)(31686004)(2906002)(4744005)(7416002)(38100700002)(6506007)(6512007)(6486002)(66556008)(66476007)(66946007)(6666004);DIR:OUT;SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?YBhbxfNllOxrpOmVV2zDpO0QEBvSowThon2dor67Lr0aT58GcF6WJFhMwinI?= =?us-ascii?Q?f2DGONJFOacBaN/u9FTC7ilyGH5uMbfqh1h/WlcZNRzrpqYkjqxtNsgP1UFM?= =?us-ascii?Q?aub7HWPz6bskIsioUe9nkCDjVMwpBe0JU3qYyIoxzSQP+lbL/MoRPYeJCzxH?= =?us-ascii?Q?K76Qr+7amvGedSYFp3Bvjtbx/GvvA1hNVXITk0aYh2BPyd0aJz7OgTuvSGul?= =?us-ascii?Q?j5XC72RnIoD66XvRm4BnMZ5D8RLjp8cL0Ol/AeMxiPdmsSe5Qp14GWy2iwwv?= =?us-ascii?Q?mfQXFsmtUFgzNR3gUJiapPCZk/5YiSmt5KjL7EcRdmmfSYQ1JK+ZDad/IGOP?= =?us-ascii?Q?b1PjDKnzH/j/z5+ei4tbfOes2fJHcgWaE/wJgIUugDKITpIkyzCVrM3bx/y7?= =?us-ascii?Q?uTu0PgQ5xWrBejcJZrYm8PA80XnaSxSS74POCgmvlD4LlX86y7v2h109JqJA?= =?us-ascii?Q?L305X1wNZYQmUhBm/82YtuJWRdsmbIiW75j40qlv+2tFHhuyngCSb376HgMI?= =?us-ascii?Q?3eJ47hb0GZ6P7fIK/lQrM6UxXB8JnjeThed5O5KxD8npsvpbO+sOTX3uFlQk?= =?us-ascii?Q?+mSKxkfuhl8/aVqPRnbUKFT94pkI08sKPGd6W4KRfZT1Prvn0UV4k4Enn1L4?= =?us-ascii?Q?ctt50fohwn/rpqRGbp1Uj2073mO3ce3vJCnWgNB9uIVmmws/75wFx6PE7XO/?= =?us-ascii?Q?qBsdCRjyBbI3ZJbdCnDHqDrbmdt0Zi+8BiatXczxjH2t+WQ9TrdJlB7sjSWM?= =?us-ascii?Q?98NYxrjGGlI0P3WbxMlBZ/XpILzIlPdyaSZ7gHgzuTi9ih5JZSULD/pxobXu?= =?us-ascii?Q?26EsOMPW8jn+dCDTI/L6mCJ0bdBWrpnD4KMNumcKOlfYSw/rtISh3wxVS7lY?= =?us-ascii?Q?ts+IsPOclVSw244+pKBJ+iV69xqxzK5NPrC2P3aktbAjLzThsDo806siQ7zI?= =?us-ascii?Q?BLpMd98LSZ14ZtroVSAVfjDc3rMYHwU14QK6axVAV8yrdeD4fhMDa8NAMn7Z?= =?us-ascii?Q?epPNNPLP+QKTQGF5LONSBUsRMtP7tSYW1akd10QvglEFky4GiH9iT+sRvvG/?= =?us-ascii?Q?JmrSAH9MgN3Yat5PKQTMZQ4/iBDYIV7W8xvEXRYG0hLKJq2R+itFQgHKqjaa?= =?us-ascii?Q?W1k4VVN0wjUg+xT3c17lGULYmvAnD8ak5Yf0WlP2GKqp77eA8PhmnseNLbCs?= =?us-ascii?Q?0El4bF28ORFsJ9La9xk4MfbKvqcsSJ02mJCVLlVZZqYWMY/HzyAnxTgAMJek?= =?us-ascii?Q?xSr9BrUXvxEq7+0sbWIKyCVwpjVhV1e/llAiwfHJlu54bATJu2suT6OaPJX9?= =?us-ascii?Q?SpBg8GlyhMeSNfFjgt72PgMqjstOmCnxtQ4rrdmb906t+BRoxgHQLNjRnONG?= =?us-ascii?Q?yaqi6K1cCVMfng4O5XAk9fuUp/jyBaITKpcuICbFXgBsxJZU/aiEM7UMwN8s?= =?us-ascii?Q?oVdjLaxB5BJxFGYQEO//RBiLvMIorbbLQ+diOGfXUeOywn2jxIbAeL4lRpkD?= =?us-ascii?Q?1CevMNsBikvvleuErDdUIe9cCx6QhvrkOaAZjsHqSdtAuHYf5jSlB/GMzWw1?= =?us-ascii?Q?ARtPiPzo6MKYvXprngPGErLi/EEfMRQyyBKWfKQAGWTaIxa3ANknwmV5HHjr?= =?us-ascii?Q?CpBGQUat2vXEsRQT65Brudg=3D?= X-OriginatorOrg: os.amperecomputing.com X-MS-Exchange-CrossTenant-Network-Message-Id: 619f18a9-a364-4992-c36f-08dbb5951f39 X-MS-Exchange-CrossTenant-AuthSource: DM6PR01MB5259.prod.exchangelabs.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 15 Sep 2023 02:40:28.3062 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3bc2b170-fd94-476d-b0ce-4229bdc904a7 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: v3XddJRDRf0jPj6tA2iokEwIfZKQuT3GRKt95qNC/Nf3Z536AsN/pBPQefKXfcgpdJU8o3yyq4Rsc3FOjc5o/43okQoeyq96QJivAOxqQas= X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH0PR01MB6151 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 14 Sep 2023, Feng Tang wrote: > One reason I wanted to revisit the MIN_PARTIAL is, it was changed from > 2 to 5 in 2007 by Christoph, in commit 76be895001f2 ("SLUB: Improve > hackbench speed"), the system has been much huger since then. > Currently while a per-cpu partial can already have 5 or more slabs, > the limit for a node with possible 100+ CPU could be reconsidered. Well the trick that I keep using in large systems with lots of memory is to use huge page sized page allocation. The applications on those already are using the same page size. Doing so usually removes a lot of overhead and speeds up things significantly. Try booting with "slab_min_order=9"