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Robelix
l33t
Joined: 21 Jul 2002
Posts: 760
Location: in a World created by a Flying Spaghetti Monster
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 Posted: Sun Apr 26, 2009 12:58 pm Post subject: ondemand governor failed, too long transition latency of HW |
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| Code: | | ondemand governor failed, too long transition latency of HW, fallback to performance governor |
Any Ideas what can be causing this?
ThinkPad T23 with Pentium 3 Mobile 1133MHz
kernel: 2.6.28-gentoo-r5
| Code: | dings ~ # cpufreq-info
cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to linux@brodo.de, please.
analyzing CPU 0:
driver: speedstep-smi
CPUs which need to switch frequency at the same time: 0
hardware limits: 733 MHz - 1.13 GHz
available frequency steps: 1.13 GHz, 733 MHz
available cpufreq governors: powersave, ondemand, performance
current policy: frequency should be within 733 MHz and 1.13 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 1.13 GHz (asserted by call to hardware). |
I use cpufreqd-2.1.1 to switch between powersave for Battery and ondemand for AC
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Hu
Administrator
Joined: 06 Mar 2007
Posts: 23062
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| Posted: Sun Apr 26, 2009 3:52 pm Post subject: Re: ondemand governor failed, too long transition latency of |
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| Robelix wrote: | | Code: | | ondemand governor failed, too long transition latency of HW, fallback to performance governor |
Any Ideas what can be causing this?
ThinkPad T23 with Pentium 3 Mobile 1133MHz |
Based on the notes in the Kconfig help and in Documentation/cpu-freq/governors.txt, your choice of CPU is causing this. Not all CPUs can switch frequencies quickly enough to satisfy the ondemand governor. |
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lt.cyx
n00b
Joined: 04 Nov 2005
Posts: 8
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| Posted: Wed Jul 08, 2009 3:34 am Post subject: |
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I have the same with a Celeron-M. And how come it was fast enough up until 2.6.29 and now in 2.6.30 it is not? What changed?
| Code: |
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Celeron(R) M CPU 530 @ 1.73GHz
stepping : 10
cpu MHz : 1733.329
cache size : 1024 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 10
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss tm pbe nx lm constant_tsc up arch_perfmon pebs bts pni dtes64 monitor ds_cpl tm2 ssse3 cx16 xtpr pdcm lahf_lm
bogomips : 3458.31
clflush size : 64
power management:
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