From owner-freebsd-net Fri Oct 18 10:36:41 2002 Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7F5A837B401; Fri, 18 Oct 2002 10:36:40 -0700 (PDT) Received: from search.sparks.net (d-207-5-180-136.gwi.net [207.5.180.136]) by mx1.FreeBSD.org (Postfix) with ESMTP id 2662D43E9E; Fri, 18 Oct 2002 10:36:40 -0700 (PDT) (envelope-from dmiller@search.sparks.net) Received: by search.sparks.net (Postfix, from userid 100) id 4CE53D999; Fri, 18 Oct 2002 13:30:18 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by search.sparks.net (Postfix) with ESMTP id 3D224D98C; Fri, 18 Oct 2002 13:30:18 -0400 (EDT) Date: Fri, 18 Oct 2002 13:30:18 -0400 (EDT) From: David Miller To: Luigi Rizzo Cc: Attila Nagy , "Kenneth D. Merry" , Christopher Smith , hardware@FreeBSD.ORG, net@FreeBSD.ORG Subject: Re: High interrupt load on firewalls In-Reply-To: <20021018101802.A82792@carp.icir.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org On Fri, 18 Oct 2002, Luigi Rizzo wrote: > On Fri, Oct 18, 2002 at 12:59:27PM -0400, David Miller wrote: > > On Wed, 9 Oct 2002, Attila Nagy wrote: > > > > With a dc ethernet card and ~45K packets per second, an XP1700 system went > > from > 50% interrupt to < 1%. I was astounded at the change! > > that is partly cheating, because with polling, some of the work which > was done in an interrupt context is done elsewere. Still you might > have some significant load reduction, i admit :) Very significant. The system went from maxed out at 30K pps to 35% idle at > 40K pps. I suspect it's an extreme case with the dc card. I've observed less with the fxp. Thanks for all the work Luigi:) --- David To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message