Date: Fri, 18 Oct 2002 13:30:18 -0400 (EDT) From: David Miller <dmiller@search.sparks.net> To: Luigi Rizzo <rizzo@icir.org> Cc: Attila Nagy <bra@fsn.hu>, "Kenneth D. Merry" <ken@kdm.org>, Christopher Smith <csmith@its.uq.edu.au>, hardware@FreeBSD.ORG, net@FreeBSD.ORG Subject: Re: High interrupt load on firewalls Message-ID: <Pine.BSF.4.21.0210181328230.90681-100000@search.sparks.net> In-Reply-To: <20021018101802.A82792@carp.icir.org>
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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
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