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 2A180C6FD1D for ; Tue, 28 Mar 2023 01:28:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231873AbjC1B2I (ORCPT ); Mon, 27 Mar 2023 21:28:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59454 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229611AbjC1B2G (ORCPT ); Mon, 27 Mar 2023 21:28:06 -0400 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 654F01997; Mon, 27 Mar 2023 18:28:05 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1679966885; x=1711502885; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-transfer-encoding:mime-version; bh=79nSoohHIK2XRM3gwgIAPJ9WTTJHRUWr0/i3w0IfkpU=; b=NPeKwfxO8PhYUyYInAUJQEErgBqPUiqqOWcJ9v8YN5cMlKq5O2Vfzfku ByHXJFryffaVHRZ7sOn/7gn6ZC00cTSSfEThgzRmkUS7F1+92MhbcLUAF W4ZLT0l7seCoPUxSKaqC3NgAR9+hlGfefjFdpttjHEMo5wcG8Pgw6WZZE JiY9alu4UK+0V/fyQiMpmoTm22/6QJY4kwTZbe7H0NBmlwvCo764joRED zaf64m2sQru71C2zIyXm6Nqbh7AIvBK5vEWXqU6ttGboN/AxGSGk5HZW3 ggmXdvp2EMlQh5hT3RnN1xzIKigor7vW2/at2g2qNZg1gwlXOCFRDLodh A==; X-IronPort-AV: E=McAfee;i="6600,9927,10662"; a="426702511" X-IronPort-AV: E=Sophos;i="5.98,295,1673942400"; d="scan'208";a="426702511" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Mar 2023 18:28:04 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10662"; a="827261846" X-IronPort-AV: E=Sophos;i="5.98,295,1673942400"; d="scan'208";a="827261846" Received: from orsmsx603.amr.corp.intel.com ([10.22.229.16]) by fmsmga001.fm.intel.com with ESMTP; 27 Mar 2023 18:28:04 -0700 Received: from orsmsx611.amr.corp.intel.com (10.22.229.24) by ORSMSX603.amr.corp.intel.com (10.22.229.16) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.21; Mon, 27 Mar 2023 18:28:03 -0700 Received: from orsmsx610.amr.corp.intel.com (10.22.229.23) 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 15.1.2507.21; Mon, 27 Mar 2023 18:28:03 -0700 Received: from ORSEDG601.ED.cps.intel.com (10.7.248.6) by orsmsx610.amr.corp.intel.com (10.22.229.23) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2507.21 via Frontend Transport; Mon, 27 Mar 2023 18:28:03 -0700 Received: from NAM02-DM3-obe.outbound.protection.outlook.com (104.47.56.45) by edgegateway.intel.com (134.134.137.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.1.2507.21; Mon, 27 Mar 2023 18:28:03 -0700 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=jZal5uYYVjkpwFXHPFv1lYXF/y7b/uw+fvzEwru23p+JhsqbdF+o82CpEndocPmuazDFwAnZ+0OQwfB+3ww06xeFuqqnNx/8DVExfcspgmQZYh2aDZEM7/+J4YAdzjL/auWcR5Mdvif+pFOaoNVUt8aMDRsNXcylqtUTVEdTDVrg/X6HGNC/of/BeT86uCfj40Jclpk95ssA/SMI5yihoHz9N7SuS8Icz/bfw6eBVruxq3YzVPScLiyg2cmh199V4DZgxnCddGSzPyOIB6qHo9DyO59+1zG5eLHgwqp2JGBR4x2XDjECo8xSXeAytHjB3okxnRAqWDy4yuzLAaMLsg== 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=2NQK6UWCahLQc4L/1/1nvyEJwpeRGVVle/kSeqjIJpY=; b=GnEPFQLfUOHK6VA/5/9QmoDTgkH6eKadBitD8ky9PcPlLEk/kSM7jl1/y1DQTCRFw67Gp1WQ9RZpMSIesnu6VxyCsXQPCZbV14XMLz0QdaEqnFXB7dBrv943Zca21WdBPqyVVvrcxtQxMEdOZNkvy3MxkHrin99mhOxuwe41UM+ghGOvdPg2It+JuAeZz8Z42loIKyojlapctzpaWhZafCM+MrQyebAR7JdCO8RYlx4MtDLrAO+tq4s5k/Mn1lZxLU55BO4i/twI8o5js2jJjPe5yQse5KIDbo3uIHZJqOGdqsAf/hUtRcjppQPt5JGkGUPn6o1kRKM/mQsSVw1l3A== 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 SJ1PR11MB6179.namprd11.prod.outlook.com (2603:10b6:a03:45a::17) by PH7PR11MB6858.namprd11.prod.outlook.com (2603:10b6:510:1ee::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6178.41; Tue, 28 Mar 2023 01:28:01 +0000 Received: from SJ1PR11MB6179.namprd11.prod.outlook.com ([fe80::850a:d637:5760:4f53]) by SJ1PR11MB6179.namprd11.prod.outlook.com ([fe80::850a:d637:5760:4f53%6]) with mapi id 15.20.6178.041; Tue, 28 Mar 2023 01:28:01 +0000 From: "Zhuo, Qiuxu" To: Steven Rostedt , Uladzislau Rezki CC: "Paul E . McKenney" , RCU , "quic_neeraju@quicinc.com" , Boqun Feng , Joel Fernandes , LKML , Oleksiy Avramchenko , Frederic Weisbecker Subject: RE: [PATCH 1/1] Reduce synchronize_rcu() waiting time Thread-Topic: [PATCH 1/1] Reduce synchronize_rcu() waiting time Thread-Index: AQHZW9/cgEn1/2PZAki4vZrvu1Ahi68FQZQwgAAWuoCACdu/AIAAAKGAgAA3iiA= Date: Tue, 28 Mar 2023 01:28:01 +0000 Message-ID: References: <20230321102748.127923-1-urezki@gmail.com> <20230327174844.15305988@gandalf.local.home> <20230327175059.1e8584cc@gandalf.local.home> In-Reply-To: <20230327175059.1e8584cc@gandalf.local.home> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=intel.com; x-ms-publictraffictype: Email x-ms-traffictypediagnostic: SJ1PR11MB6179:EE_|PH7PR11MB6858:EE_ x-ms-office365-filtering-correlation-id: 121a0576-d4bc-4987-b1cf-08db2f2babc1 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:SJ1PR11MB6179.namprd11.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(396003)(136003)(366004)(39860400002)(376002)(346002)(451199021)(54906003)(4326008)(8676002)(9686003)(186003)(316002)(41300700001)(110136005)(478600001)(2906002)(8936002)(122000001)(7416002)(5660300002)(82960400001)(52536014)(38100700002)(55016003)(71200400001)(53546011)(7696005)(38070700005)(33656002)(83380400001)(6506007)(26005)(64756008)(66946007)(66446008)(66476007)(76116006)(66556008)(86362001);DIR:OUT;SFP:1102; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?us-ascii?Q?DmRYOgXmCf5nv9DhcrviyZkwRzseIKeIVb7pUSr04eUEH8pnVZvV+HPkLQ25?= =?us-ascii?Q?sUcl+fu4jUi9YfJRRhuTi1GYktbOzNablRqewdyWQVbX3WEc20hGV7K+7gdm?= =?us-ascii?Q?sMAT8zC6QPqrER0q4F7YJe74SvBTDN65WufWKl5flC620FK20U6QlRVUv79D?= =?us-ascii?Q?NWP9Aa78TRhOD8h9u7UZlAE8CCvryMzLUB73KUifWreGigcDKmpt0+Myi1PD?= =?us-ascii?Q?TOaECZ6g5NtpuFXsS15CAPr67+AF9yiFM6Q87F+lyo8QdaeyfJBlmKywskm7?= =?us-ascii?Q?RChxl6eLZI6PDEhMnqYSTxyPW4qczJrN/uJycQtwV1+ZxUPbCswk4esJRyPK?= =?us-ascii?Q?cOqWdx0wqo4iiWTT3G1Vs4vOivS93S+VHOz4+fsrJHkjo6XiBVhPWH8Fuzal?= =?us-ascii?Q?ma4GXnja94A2keQinMgnRKd+gwkzRdCc9h+7LKypOdec9JCgEmF5hqqeE2Yn?= =?us-ascii?Q?yMnfv/4NU6EgXPmjk0DdtkVB0He61/jEJhVi6hKztZlxCOgjG/Xd7as1SXJa?= =?us-ascii?Q?1kP0sNdssfpOhKsj1giaOeDZXqCLq/mFvy7GorhffY8yANiqx6kJDE4zk9/+?= =?us-ascii?Q?rSALVY3JeVQqV0hpPLditsbnAmCxLAQQ/XGZ1CPBnoowdDr0edGRLR16x7fs?= =?us-ascii?Q?d6NXYk4aYYaX8p3F5V6sFFGD8uIMh5XUSjOc5LpQUsduyUgpqn0iz4rKBVdh?= =?us-ascii?Q?G4ovsKh4ddey+xyZmlPm4FGTd21xXtURl6sCpRhA1P3MYWNKYwaW0woQ9QHE?= =?us-ascii?Q?Gp1cIt053TUs97q545/IDrs+74monymLiwYrzQQ4qnWuD2nYTbR1bk2XVd2y?= =?us-ascii?Q?A3iN55gzrLhftDfiVaRhItEsVkfx5pBzf1NurIoco0sjzMMoJ7ixEL4U6R88?= =?us-ascii?Q?LK20ZkeWpytNtIA0+Fa0gLNx8Jxu8bKQeHcEKNz6VaXmkf0OkmhnEJkgeBFR?= =?us-ascii?Q?ZbHmBzafXbGXGH8cQU72tWhZ4W44JePLSNMMEuYS2H+V8emBVx4ThWipr4Pw?= =?us-ascii?Q?Av75JxDlTd9Ypgmbn900vrpWFe5AXC2U78zA0xfYFRpxVJKq67EvZ4fMJ4WE?= =?us-ascii?Q?lOeJRdc6qiHr+WAbi/r39QrNxqyjpvCnp/n/4IMyLOHuZq9Lhu1JSr1f1heG?= =?us-ascii?Q?zGAleyiWKFtJWPRxgeRv/tMGjt1PFHZJvIGe8uJRZ/Nq88fxAucDsDaIXJ/9?= =?us-ascii?Q?nf6IhcHqWTXC3J3Bvx/lVg/bBxS59L9R9sw+H80UiDti/ERRJ28XUvzRK2oT?= =?us-ascii?Q?DrZIn+Ii0/2KlSdWy5VG//HLAK24UXWII4K8WKrr8MQ8E4iXQjh+lBorOjU3?= =?us-ascii?Q?o0yjmp/3wWj2QhAYbrxRdR6JQ+D5f+tmiTzwbgJF3WUxu8EA//B8AKJKPExB?= =?us-ascii?Q?bK4og2Qt/qdM70kmpppcY4v4uxXNZkcNVsp4EsD3efeV8lnqbqJKIMpkiDYK?= =?us-ascii?Q?eQQDQHwbKaNRp/PgMRvsPLZ8R2MMA+kuvIXxbc2AbveoPGX8nSBHn3geFqcr?= =?us-ascii?Q?y3EuY1nwy7Bed7NavFw15rRwcumZ1LPturVtYu+0WeQmdN+cEzksP8XxTC97?= =?us-ascii?Q?huaRnVxJAhC3dv9oeE3JzRkL0cugoOMKSg5ZFv/C?= Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SJ1PR11MB6179.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 121a0576-d4bc-4987-b1cf-08db2f2babc1 X-MS-Exchange-CrossTenant-originalarrivaltime: 28 Mar 2023 01:28:01.4129 (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: UczV5Nj45ld8tviRJwhifYUs9vAGzd/ZeYmOX+KT4I0zI2nqkDutOlS9FAwVi2vYMTDlO7EW+Zhr66dDI6gXRg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR11MB6858 X-OriginatorOrg: intel.com Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > From: Steven Rostedt > Sent: Tuesday, March 28, 2023 5:51 AM > [...] > Subject: Re: [PATCH 1/1] Reduce synchronize_rcu() waiting time >=20 > On Mon, 27 Mar 2023 17:48:44 -0400 > Steven Rostedt wrote: >=20 > > struct my_info { > > /* store state info here */ > > }; > > > > int main(...) { > > struct tracecmd_input *handle; > > struct my_info info; > > char *file =3D argv[1]; > > > > handle =3D tracecmd_open(file); > > > > tracecmd_follow_event(handle, "rcu", "rcu_batch_start", > > batch_start, &info); > > > > tracecmd_follow_event(handle, "rcu", "rcu_batch_end", > > batch_end, &info); > > > > tracecmd_follow_event(handle, "rcu", "rcu_invoke_callback", > > invoke_callback, &info); > > > > tracecmd_iterate_events(handle, NULL, 0, NULL, NULL); > > > > tracecmd_close(handle); > > } >=20 > BTW, none of this code was actually tested, so I may have some syntax > errors. I just did this straight from memory, as it's so easy ;-) Thank you Steven for sharing the libtracecmd-based and libtraceevent-based= =20 methods for trace parsing. Good to know this. This should simplify the code= =20 to parse trace logs. Pretty useful for me/us ;-) - Qiuxu >=20 > -- Steve