On Wed, 2004-11-10 at 21:28 +0000, Robert Watson wrote: > On Wed, 10 Nov 2004, Joe Marcus Clarke wrote: > > > [NON-Text Body part not included] > > If you diff the dmesg "before" and "after", are there any signs of > substantial interrupt or device configuration changes? Paying particular > attention, perhaps, to assignment of interrupt numbers, etc. Do settings > like ACPI make a difference? I was just going to send this: Sorry to follow up to myself, but I found another piece of information. Even when the system is completely idle, top reports this: CPU states: 0.0% user, 0.0% nice, 1.6% system, 85.2% interrupt, 13.2% idle My interrupt usage never drops below 80%. systat reports that all of this (161756 interrupts per second) is taken up by ata0 on IRQ 14. I don't have any harddrives attached to the internal ATA controller, and disabling this in the BIOS has no effect. I noticed the interrupt storm detection line in dmesg. In previous builds, this worked, but it doesn't seem to be taking effect anymore. NOTE: Disabling ACPI _does_ correct the problem. Any idea what could have changed such that the interrupt storm throttler no longer works? Joe > > Robert N M Watson FreeBSD Core Team, TrustedBSD Projects > robert_at_fledge.watson.org Principal Research Scientist, McAfee Research > > > -- Joe Marcus Clarke FreeBSD GNOME Team :: gnome_at_FreeBSD.org FreeNode / #freebsd-gnome http://www.FreeBSD.org/gnome
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