From owner-freebsd-hackers@FreeBSD.ORG Wed Apr 9 17:28:28 2003 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6599337B401; Wed, 9 Apr 2003 17:28:28 -0700 (PDT) Received: from mta6.snfc21.pbi.net (mta6.snfc21.pbi.net [206.13.28.240]) by mx1.FreeBSD.org (Postfix) with ESMTP id 0DF1843FA3; Wed, 9 Apr 2003 17:28:28 -0700 (PDT) (envelope-from hsu@FreeBSD.org) Received: from FreeBSD.org ([63.193.112.125]) by mta6.snfc21.pbi.net (iPlanet Messaging Server 5.1 HotFix 1.6 (built Oct 18 2002)) with ESMTP id <0HD30045UQMBJD@mta6.snfc21.pbi.net>; Wed, 09 Apr 2003 17:27:47 -0700 (PDT) Date: Wed, 09 Apr 2003 17:29:02 -0700 From: Jeffrey Hsu To: j_guojun@lbl.gov Message-id: <0HD30045VQMBJD@mta6.snfc21.pbi.net> MIME-version: 1.0 X-Mailer: exmh version 2.5 07/13/2001 with nmh-1.0.4 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7BIT cc: freebsd-hackers@freebsd.org cc: freebsd-performance@freebsd.org Subject: Re: tcp_output starving -- is due to mbuf get delay? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 10 Apr 2003 00:28:28 -0000 > I have change NMBCLUSTER from 2446 to 6566 to 10240, > and nothing is improved. What does netstat -m say? > Is there any way to make MGET/MCLGET not to wait? You could try changing the M_WAIT to M_NOWAIT. Finally, I hope you're running FreeBSD 4.8, because the 5.x series is known to be much slower. Jeffrey