From owner-freebsd-performance@FreeBSD.ORG Wed Oct 20 20:33:25 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 2617416A4CE for ; Wed, 20 Oct 2004 20:33:25 +0000 (GMT) Received: from dfmm.org (walter.dfmm.org [66.180.195.210]) by mx1.FreeBSD.org (Postfix) with ESMTP id DE2A243D1F for ; Wed, 20 Oct 2004 20:33:24 +0000 (GMT) (envelope-from jason@shalott.net) Received: (qmail 45138 invoked by uid 1000); 20 Oct 2004 20:33:24 -0000 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 20 Oct 2004 20:33:24 -0000 Date: Wed, 20 Oct 2004 13:33:24 -0700 (PDT) From: Jason Stone X-X-Sender: jason@walter To: Uwe Doering In-Reply-To: <4176C7A8.6030407@geminix.org> Message-ID: <20041020132734.B79820@walter> References: <004001c4b69d$80e21f40$0c0210ac@ADMIN1> <41766350.4080901@centtech.com><4176C7A8.6030407@geminix.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Mailman-Approved-At: Wed, 20 Oct 2004 22:06:51 +0000 cc: freebsd-performance@freebsd.org Subject: Re: decreasing interrupt CPU load 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: Wed, 20 Oct 2004 20:33:25 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 > Since you mentioned earlier that you run this on an SMP system, are you > aware that device polling is available only for single CPU kernels, that > is, not in SMP mode? I read somewhere that there wasn't a specific reason for not allowing device polling and smp to be used at the same time, and that it was fairly safe to remove the #ifdef SMP/#error block in sys/kern/kern_poll.c and compile in both smp and device polling. I haven't done this in a production environment, but I've done it on my smp desktop box, and it seems to work okay. -Jason -------------------------------------------------------------------------- Freud himself was a bit of a cold fish, and one cannot avoid the suspicion that he was insufficiently fondled when he was an infant. -- Ashley Montagu -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (FreeBSD) Comment: See https://private.idealab.com/public/jason/jason.gpg iD8DBQFBdsuUswXMWWtptckRAjP+AJwIVhDLkgL7FX4+wOkgOz05oD70IwCg2LdF N3+2mycBiVcR1jrAB1L41gc= =rMKb -----END PGP SIGNATURE-----