From owner-freebsd-performance@FreeBSD.ORG Tue Jun 29 17:36:42 2004 Return-Path: Delivered-To: freebsd-performance@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3BAC016A4CE for ; Tue, 29 Jun 2004 17:36:42 +0000 (GMT) Received: from mail.trippynames.com (mail.trippynames.com [216.143.148.128]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2E57D43D54 for ; Tue, 29 Jun 2004 17:36:42 +0000 (GMT) (envelope-from sean@chittenden.org) Received: from localhost (localhost [127.0.0.1]) by mail.trippynames.com (Postfix) with ESMTP id B87FDA715C; Tue, 29 Jun 2004 10:36:41 -0700 (PDT) Received: from mail.trippynames.com ([127.0.0.1]) by localhost (rand.nxad.com [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 77731-05; Tue, 29 Jun 2004 10:36:40 -0700 (PDT) Received: from [192.168.102.100] (dsl081-160-109.sea1.dsl.speakeasy.net [64.81.160.109]) by mail.trippynames.com (Postfix) with ESMTP id 4FD55A1320; Tue, 29 Jun 2004 10:36:40 -0700 (PDT) In-Reply-To: <40E1A47D.6020709@t7ds.com.br> References: <40E1A47D.6020709@t7ds.com.br> Mime-Version: 1.0 (Apple Message framework v618) Content-Type: text/plain; charset=US-ASCII; format=flowed Message-Id: Content-Transfer-Encoding: 7bit From: Sean Chittenden Date: Tue, 29 Jun 2004 10:36:38 -0700 To: fabulous X-Mailer: Apple Mail (2.618) cc: freebsd-performance@freebsd.org Subject: Re: net.inet.tcp.sendspace X-BeenThere: freebsd-performance@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Performance/tuning List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 29 Jun 2004 17:36:42 -0000 > Is there any way to change its value according to the connection's uid > or port? Not with sysctl(8). You can by hacking the application and adding a few setsockopt(2) calls, specifically the SO_RCVBUF and SO_SNDBUF options. Here's a sample snippit you could follow: /* Add these #includes if they aren't already there */ #include #include /* Add this to the top of the function that calls listen(2) */ int rcvbuf = 4096; int sndbuf = 4096; /* And add these calls before the application makes its listen(2) call. You may find that some applications are already setting their send and receive buffer sizes. */ if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &rcvbuf, sizeof(rcvbuf)) != 0) err(EX_OSERR, "setsockopt(2) for SO_RCVBUF failed"); if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &sndbuf, sizeof(sndbuf)) != 0) err(EX_OSERR, "setsockopt(2) for SO_SNDBUF failed"); > I need small sendspaces to ircd and bigger ones to apache.. Add the above to each of the applications before they make their listen(2) calls. It's a shame more applications don't let you tweak this value via a config file. -sc -- Sean Chittenden