Date: Sun, 22 Jan 2006 17:25:33 -0500 From: Kris Kennaway <kris@obsecurity.org> To: Tobias Roth <roth@iam.unibe.ch> Cc: stable@freebsd.org Subject: Re: system laggy under load, SCHED_BSD Message-ID: <20060122222532.GA62073@xor.obsecurity.org> In-Reply-To: <20060122220028.GB1379@droopy.unibe.ch> References: <20060122220028.GB1379@droopy.unibe.ch>
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--pWyiEgJYm5f9v55/ Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Jan 22, 2006 at 11:00:28PM +0100, Tobias Roth wrote: > Hi >=20 > Since some time, I experience extremely bad system behaviour under > load. For instance when compiling something, or unpacking a large > archive, the system is almost unusable, even the mouse pointer > reacts sloppy. >=20 > My system: >=20 > 6.0-STABLE FreeBSD 6.0-STABLE #7: Sun Jan 22 15:53:39 CET 2006 i386 >=20 > I use SCHED_BSD. >=20 > How can I diagnose the problem, or provide more information? What > factors might influence what I experience? I cannot give a more precise > point in time as when this started, since I switched versions and > systems a few times recently. This has been discussed a number of times: the short answer is to look for interrupt storms (vmstat -i), interrupt sharing (also vmstat -i), and in particular shared interrupts involving usb or other drivers still under Giant. Kris --pWyiEgJYm5f9v55/ Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.2 (FreeBSD) iD8DBQFD1AZcWry0BWjoQKURAhr1AJ9sUAyRHR3zRQRJjveahQwBetICiACgj3xE jBxwoUK2KDbpfJ6AdCMBhsc= =eTT4 -----END PGP SIGNATURE----- --pWyiEgJYm5f9v55/--
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