On Thu, 2007-02-22 at 00:04 +0100, Luca Tettamanti wrote: > Hi Thomas, > I'm testing NO_HZ on my machines. On the laptop I see that the timer > interrupt counter is incremented (though slower than HZ). This machine > is running UP kernel. > > On my desktop I see this: > > CPU0 CPU1 > 0: 114 0 IO-APIC-edge timer > 1: 1624 10771 IO-APIC-edge i8042 > 6: 3 0 IO-APIC-edge floppy > 7: 0 0 IO-APIC-edge parport0 > 9: 0 0 IO-APIC-fasteoi acpi > 12: 40111 184047 IO-APIC-edge i8042 > 16: 75624 998858 IO-APIC-fasteoi [EMAIL > PROTECTED]:0000:01:00.0, uhci_hcd:usb1 > 17: 0 0 IO-APIC-fasteoi uhci_hcd:usb4 > 18: 711 5487 IO-APIC-fasteoi ide1, libata, ehci_hcd:usb7, > uhci_hcd:usb3 > 19: 617 2254 IO-APIC-fasteoi libata, uhci_hcd:usb2 > 20: 0 0 IO-APIC-fasteoi ehci_hcd:usb6, uhci_hcd:usb5 > 21: 2483869 0 IO-APIC-fasteoi eth0 > 22: 2 0 IO-APIC-fasteoi ohci1394 > 218: 28872 360643 PCI-MSI-edge HDA Intel > 219: 32932 138196 PCI-MSI-edge libata > NMI: 0 0 > LOC: 2761191 2827539 > ERR: 0 > MIS: 0 > > Interrupt 0 is stuck at 114 (the number is consistent across reboots). I > don't experience any problem, time is running fine. Still it's strange > that the timer is doing nothing; maybe something other than the PIT is > used for time keeping?
Yes, we switch away from PIT and use the local APIC timer. (LOC) tglx - 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/