From owner-freebsd-current@FreeBSD.ORG Thu Nov 24 03:27:43 2005 Return-Path: X-Original-To: current@freebsd.org Delivered-To: freebsd-current@FreeBSD.ORG Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id C736C16A420; Thu, 24 Nov 2005 03:27:43 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: from elvis.mu.org (elvis.mu.org [192.203.228.196]) by mx1.FreeBSD.org (Postfix) with ESMTP id 52F2543D55; Thu, 24 Nov 2005 03:27:42 +0000 (GMT) (envelope-from kris@obsecurity.org) Received: from obsecurity.dyndns.org (elvis.mu.org [192.203.228.196]) by elvis.mu.org (Postfix) with ESMTP id 3D3521A3C28; Wed, 23 Nov 2005 19:27:42 -0800 (PST) Received: by obsecurity.dyndns.org (Postfix, from userid 1000) id 46AC451592; Wed, 23 Nov 2005 22:27:41 -0500 (EST) Date: Wed, 23 Nov 2005 22:27:41 -0500 From: Kris Kennaway To: Michael Vince Message-ID: <20051124032740.GA13569@xor.obsecurity.org> References: <20051123030304.GA84202@xor.obsecurity.org> <20051123084653.GA90927@xor.obsecurity.org> <43851A08.5080802@roq.com> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="oyUTqETQ0mS9luUI" Content-Disposition: inline In-Reply-To: <43851A08.5080802@roq.com> User-Agent: Mutt/1.4.2.1i Cc: John Polstra , net@freebsd.org, current@freebsd.org, Kris Kennaway Subject: Re: em interrupt storm X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 Nov 2005 03:27:43 -0000 --oyUTqETQ0mS9luUI Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Nov 24, 2005 at 12:40:24PM +1100, Michael Vince wrote: > chipset in all their servers. > Luckily I haven't not seen the problem on any of my Dell servers (as=20 > long as I am looking at this right). >=20 > This server has been running for a long time. > vmstat -i > interrupt total rate > irq1: atkbd0 6 0 > irq4: sio0 23433 0 > irq6: fdc0 10 0 > irq8: rtc 2631238611 128 > irq13: npx0 1 0 > irq14: ata0 99 0 The interrupt storm only happens when other interrupts are delivered to other devices, e.g. when you're doing a lot of filesystem I/O. =20 > irq16: uhci0 1507608958 73 > irq64: em0 1513106157 73 Both of these look like they might be experiencing it, since they have extremely high counts. Your USB controller shouldn't have that many interrupts, for example. > 1000 simultaneous tcp connections under a load of 35. Both seem OK. > vmstat -i > interrupt total rate > irq4: sio0 315 0 > irq13: npx0 1 0 > irq14: ata0 47 0 > irq16: uhci0 2894669 2 > irq64: em0 2890414 2 Again uhci seems to have a lot of interrupts. Kris --oyUTqETQ0mS9luUI Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFDhTMsWry0BWjoQKURApuSAKDAJN9PEgWc4aGVvTxp8JIsluAk3QCffNrr 5TEzezZZCjVRkd4tMYZV1CY= =AYDB -----END PGP SIGNATURE----- --oyUTqETQ0mS9luUI--