<snip>
Mainboard: ASUS P5B-VM DO
Processor: Intel E6600 @ 2.40Ghz
> $ lspci
>
> 00:00.0 Host bridge: Intel Corporation 82Q963/Q965 Memory Controller Hub
> (rev 02)
> 00:01.0 PCI bridge: Intel Corporation 82Q963/Q965 PCI Express Root Port
> (rev 02)
> 00:02.0 VGA compatible controller: Intel Corporation 82Q963/Q965
> Integrated Graphics Controller (rev 02)
> 00:19.0 Ethernet controller: Intel Corporation 82566DM Gigabit Network
> Connection (rev 02)
> 00:1a.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI
> #4 (rev 02)
> 00:1a.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI
> #5 (rev 02)
> 00:1a.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI
> #2 (rev 02)
> 00:1d.0 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI
> #1 (rev 02)
> 00:1d.1 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI
> #2 (rev 02)
> 00:1d.2 USB Controller: Intel Corporation 82801H (ICH8 Family) USB UHCI
> #3 (rev 02)
> 00:1d.7 USB Controller: Intel Corporation 82801H (ICH8 Family) USB2 EHCI
> #1 (rev 02)
> 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev f2)
> 00:1f.0 ISA bridge: Intel Corporation 82801HO (ICH8DO) LPC Interface
> Controller (rev 02)
> 00:1f.2 SATA controller: Intel Corporation 82801HB (ICH8) SATA AHCI
> Controller (rev 02)
> 00:1f.3 SMBus: Intel Corporation 82801H (ICH8 Family) SMBus Controller
> (rev 02)
Kernel with time drift and only "jiffies" in
/sys/devices/system/clocksource/clocksource0/available_clocksource
kernel-2.6.18-1.2798.fc6.x86_64 to
kernel-2.6.20-1.2948.fc6.x86_64
Kernel with no time drift and "tsc hpet acpi_pm jiffies" in
/sys/devices/system/clocksource/clocksource0/available_clocksource
kernel-2.6.21-1.3116.fc7.x86_64
kernel-2.6.20-1.3104.fc7.x86_64
kernel-2.6.18-8.el5.x86_64
And now the interesting part:
Kernel with no time drift and only "jiffies" in
/sys/devices/system/clocksource/clocksource0/available_clocksource
kernel-2.6.18-8.el5.x86_64 booted form CentOS 5 media
Conclusion:
When I boot the kernel kernel-2.6.18-8.el5.x86_64 from CentOS 5 media I
have no timedrift. When I install the kernel and boot from Disk the
timedrift is back. The only clocksource available is jiffies.
I could find a difference in /proc/interrupts when booted from media and
when booted from disk (same kernel).
Disk:
more /proc/interrupts
CPU0 CPU1
0: 421495 390043 IO-APIC-edge timer
1: 8 0 IO-APIC-edge i8042
....
Media:
more /proc/interrupts
CPU0 CPU1
0: 821592 0 IO-APIC-edge timer
1: 8 0 IO-APIC-edge i8042
....
So the question is, could the "binding" of the timer interrupt to only
the first cpu solve my problem?
Henry
