From owner-freebsd-stable Mon Oct 8 6:42:27 2001 Delivered-To: freebsd-stable@freebsd.org Received: from proxy.centtech.com (moat.centtech.com [206.196.95.10]) by hub.freebsd.org (Postfix) with ESMTP id 54CD137B40A; Mon, 8 Oct 2001 06:42:22 -0700 (PDT) Received: from sprint.centtech.com (sprint.centtech.com [10.177.173.31]) by proxy.centtech.com (8.11.6/8.11.6) with ESMTP id f98DgL411385; Mon, 8 Oct 2001 08:42:21 -0500 (CDT) Received: from centtech.com (proton [10.177.173.77]) by sprint.centtech.com (8.9.3+Sun/8.9.3) with ESMTP id IAA06700; Mon, 8 Oct 2001 08:42:21 -0500 (CDT) Message-ID: <3BC1AD03.127B3B21@centtech.com> Date: Mon, 08 Oct 2001 08:41:23 -0500 From: Eric Anderson Reply-To: anderson@centtech.com Organization: Centaur Technology X-Mailer: Mozilla 4.78 [en] (X11; U; Linux 2.2.12 i386) X-Accept-Language: en MIME-Version: 1.0 To: Danny Braniss Cc: freebsd-hackers@freebsd.org, stable@freebsd.org Subject: Re: strange network performace References: Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG And what happens when you go from A or B to C? Have you been running a top or systat -vmstat while this is happening? I'm thinking it might be a purely IO thing, on the proc box. I have seen similar slowness with the default FreeBSD install on single proc boxes, but a few sysctl's seem to do the trick. Eric Danny Braniss wrote: > > > How many times did you run the test? Could it have been cached in host B, but not C? What about disk performance? > > Maybe one is ATA66 or 100, and tthe other is not? Host C may only be UDMA33, and possibly have a slow drive, with a > > lower amount of memory for caching. Did you rebuild kernels on any of them? > > > > so many questions :-)! > > the test were run many times, on host C the port was changed, the cable was > changed, the NIC was changed. > > the disk is not relevant, the test uses a small program i wrote that writes > from memory. > > at the moment all three run the same version of the kernel, the only diff is > that A & B are smp, and C is not. > > danny -- ------------------------------------------------------------- Eric Anderson anderson@centtech.com Centaur Technology # rm -rf /bin/laden ------------------------------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message