On Fri, 2005-04-01 at 23:05 -0800, Pallipadi, Venkatesh wrote:It can be SMI happening in the platform. Typically BIOS uses some SMI> polling to handle some devices during early boot. Though 500 microseconds > sounds a bit too high.
Nope, that sounds just about right. Buggy BIOSes that implement ACPI via SMM (or so I have been told) can stall the machine for over a millisecond, this is why some laptops lose timer ticks at HZ=1000. The issue is well known by Linux audio users, as it causes big problems for people who buy laptops for live audio use.
This is a desktop board, and this is well after boot (hours). Also, ACPI is disabled in the BIOS.
I suppose I can try to disable SMI via the APIC? -- /Jonathan Lundell. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
