From: Stefano Brivio <stefano.brivio@polimi.it>
To: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Michael Buesch <mb@bu3sch.de>
Subject: Re: [BUG] jiffies counter leaps in 2.6.24-rc3
Date: Thu, 29 Nov 2007 09:50:34 +0100 [thread overview]
Message-ID: <20071129095034.24b3fc59@morte> (raw)
In-Reply-To: <200711242031.26134.rjw@sisk.pl>
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?
--
Ciao
Stefano
next prev parent reply other threads:[~2007-11-29 8:53 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-24 16:51 [BUG] jiffies counter leaps in 2.6.24-rc3 Stefano Brivio
2007-11-24 17:56 ` Frans Pop
2007-11-24 18:09 ` Stefano Brivio
2007-11-24 18:48 ` Rafael J. Wysocki
2007-11-24 18:46 ` Stefano Brivio
2007-11-24 19:31 ` Rafael J. Wysocki
2007-11-26 18:00 ` Stefano Brivio
2007-11-29 7:20 ` Stefano Brivio
2007-11-29 10:33 ` Ingo Molnar
2007-11-29 8:50 ` Stefano Brivio [this message]
2007-11-29 10:35 ` Ingo Molnar
2007-11-29 17:45 ` Dave Jones
2007-11-29 17:57 ` Stefano Brivio
2007-11-29 18:24 ` Dave Jones
2007-11-29 19:25 ` Stefano Brivio
2007-11-29 19:36 ` Ingo Molnar
2007-11-29 20:12 ` Stefano Brivio
2007-11-29 20:04 ` Dave Jones
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