Date: Wed, 23 Nov 2005 22:27:41 -0500 From: Kris Kennaway <kris@obsecurity.org> To: Michael Vince <mv@roq.com> Cc: John Polstra <jdp@polstra.com>, net@freebsd.org, current@freebsd.org, Kris Kennaway <kris@obsecurity.org> Subject: Re: em interrupt storm Message-ID: <20051124032740.GA13569@xor.obsecurity.org> In-Reply-To: <43851A08.5080802@roq.com> References: <20051123030304.GA84202@xor.obsecurity.org> <XFMail.20051122205449.jdp@polstra.com> <20051123084653.GA90927@xor.obsecurity.org> <43851A08.5080802@roq.com>
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--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--
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