Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261188AbTEKIzL (ORCPT ); Sun, 11 May 2003 04:55:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261190AbTEKIzL (ORCPT ); Sun, 11 May 2003 04:55:11 -0400 Received: from node-d-1ea6.a2000.nl ([62.195.30.166]:24558 "EHLO laptop.fenrus.com") by vger.kernel.org with ESMTP id S261188AbTEKIzJ (ORCPT ); Sun, 11 May 2003 04:55:09 -0400 Subject: Re: irq balancing: performance disaster From: Arjan van de Ven Reply-To: arjanv@redhat.com To: Jos Hulzink Cc: linux-kernel In-Reply-To: <200305110118.10136.josh@stack.nl> References: <200305110118.10136.josh@stack.nl> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="=-w+ycHDmHaisHxQoP0Kyx" Organization: Red Hat, Inc. Message-Id: <1052644067.1371.1.camel@laptop.fenrus.com> Mime-Version: 1.0 X-Mailer: Ximian Evolution 1.2.4 (1.2.4-2) Date: 11 May 2003 11:07:47 +0200 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1381 Lines: 43 --=-w+ycHDmHaisHxQoP0Kyx Content-Type: text/plain Content-Transfer-Encoding: quoted-printable On Sun, 2003-05-11 at 01:18, Jos Hulzink wrote: > Hi, >=20 > While tackling bug 699, it became clear to me that irq balancing is the c= ause=20 > of the performance problems I, and all people using the SMP kernel Mandra= ke=20 > 9.1 ships, are dealing with. I got the problems with 2.5.69 too. After=20 > disabling irq balancing, the system is remarkably faster, and much more=20 > responsive.=20 >=20 > For those interested in the issue, please look at bug 699. please try the following app instead: http://people.redhat.com/arjanv/irqbalance/ the in kernel irqbalancer in 2.4 kernels has some worst case behaviors at least, and the userspace implementation avoids those. --=-w+ycHDmHaisHxQoP0Kyx Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) iD8DBQA+vhLjxULwo51rQBIRAoGsAJ93UZYFqryuQuOhvQO2bBaJTVFFxgCfRt4G uYMdAmRZ9FLBJgbPmfbtxlY= =DBNa -----END PGP SIGNATURE----- --=-w+ycHDmHaisHxQoP0Kyx-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/