From owner-freebsd-net@FreeBSD.ORG Thu Sep 20 07:36:02 2012 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 033AC106564A; Thu, 20 Sep 2012 07:36:02 +0000 (UTC) (envelope-from lars@netapp.com) Received: from mx2.netapp.com (mx2.netapp.com [216.240.18.37]) by mx1.freebsd.org (Postfix) with ESMTP id CD4C28FC08; Thu, 20 Sep 2012 07:36:01 +0000 (UTC) X-IronPort-AV: E=Sophos;i="4.80,453,1344236400"; d="p7s'?scan'208";a="691826862" Received: from smtp1.corp.netapp.com ([10.57.156.124]) by mx2-out.netapp.com with ESMTP; 20 Sep 2012 00:35:40 -0700 Received: from vmwexceht01-prd.hq.netapp.com (vmwexceht01-prd.hq.netapp.com [10.106.76.239]) by smtp1.corp.netapp.com (8.13.1/8.13.1/NTAP-1.6) with ESMTP id q8K7Zequ007748; Thu, 20 Sep 2012 00:35:40 -0700 (PDT) Received: from SACEXCMBX01-PRD.hq.netapp.com ([169.254.2.46]) by vmwexceht01-prd.hq.netapp.com ([10.106.76.239]) with mapi id 14.02.0309.002; Thu, 20 Sep 2012 00:35:40 -0700 From: "Eggert, Lars" To: Andrey Zonov Thread-Topic: [patch] sysctls for TCP timers Thread-Index: AQHNlwFihOWSHsOU1kecbvduYbb6G5eTTGcA Date: Thu, 20 Sep 2012 07:35:38 +0000 Message-ID: References: <505AC500.6060903@FreeBSD.org> In-Reply-To: <505AC500.6060903@FreeBSD.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [10.106.53.51] Content-Type: multipart/signed; boundary="Apple-Mail=_2D847243-414C-4A71-8628-F710D2687420"; protocol="application/pkcs7-signature"; micalg=sha1 MIME-Version: 1.0 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: "freebsd-net@freebsd.org" Subject: Re: [patch] sysctls for TCP timers X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 20 Sep 2012 07:36:02 -0000 --Apple-Mail=_2D847243-414C-4A71-8628-F710D2687420 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=iso-8859-1 Hi, On Sep 20, 2012, at 9:25, Andrey Zonov wrote: > Some of them may be read google's article about tuning TCP parameters > [1]. I convert most of TCP timers to sysctls [2] and we are using this > patch for few months. We tuned net.inet.tcp.rtobase and > net.inet.tcp.syncache.rexmttime and it gives good results (especially in > conjunction with cc_htcp(4)). can you share some measurements that quantify the results? Thanks, Lars --Apple-Mail=_2D847243-414C-4A71-8628-F710D2687420--