Messages in this thread | | | Date | Thu, 29 Nov 2007 11:35:11 +0100 | From | Ingo Molnar <> | Subject | Re: [BUG] jiffies counter leaps in 2.6.24-rc3 |
| |
* Stefano Brivio <stefano.brivio@polimi.it> wrote:
> Ok, I found out how to reliably reproduce this bug. The root session issue > was a bit weird, but I noticed I usually switch to root only when I need to > change the CPU frequency. And here's what happens: > > # cpuspeedy min > [after some time...] > Nov 29 09:42:31 morte [ 4408.722597] b43-phy0 ERROR: PHY transmission error > > # cpuspeedy max > Nov 29 09:42:41 morte [ 1177.238599] wmaster0: STA 00:14:c1:35:8d:eb Average rate: 540 (2160/4) > > It looks like jiffies get scaled exactly by a 3.75 factor, which is > <max_frequency>/<min_frequency> here. I use acpi-cpufreq and this is my > (only) CPU: > processor : 0 > vendor_id : GenuineIntel > cpu family : 6 > model : 13 > model name : Intel(R) Pentium(R) M processor 1.50GHz > stepping : 6 > cpu MHz : 1500.000 > cache size : 2048 KB > fdiv_bug : no > hlt_bug : no > f00f_bug : no > coma_bug : no > fpu : yes > fpu_exception : yes > cpuid level : 2 > wp : yes > flags : fpu vme de pse tsc msr mce cx8 sep mtrr pge mca cmov pat clflush dts acpi mmx fxsr sse sse2 ss tm pbe bts est tm2 > bogomips : 2993.49 > clflush size : 64 > > Any hint?
ah, the cpufreq/acpi/acpi-cpufreq angle is indeed a big clue. I've Cc:-ed various interested parties.
Ingo - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |