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psm321
n00b
Joined: 25 Mar 2003
Posts: 11
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 Posted: Tue Aug 17, 2004 9:29 pm Post subject: can't disable cpu throttling |
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Hi!
I can't figure out how to disable cpu throttling (in other words, set T0). It will let me go to a higher throttling level than T4, but not lower (see below).
| Code: | plaptop root # cat /proc/acpi/processor/CPU0/throttling
state count: 8
active state: T4
states:
T0: 00%
T1: 12%
T2: 25%
T3: 37%
*T4: 50%
T5: 62%
T6: 75%
T7: 87%
plaptop root # echo -n "0" > /proc/acpi/processor/CPU0/throttling ; cat /proc/acpi/processor/CPU0/throttling
state count: 8
active state: T4
states:
T0: 00%
T1: 12%
T2: 25%
T3: 37%
*T4: 50%
T5: 62%
T6: 75%
T7: 87%
plaptop root # echo -n "5" > /proc/acpi/processor/CPU0/throttling ; cat /proc/acpi/processor/CPU0/throttling
state count: 8
active state: T5
states:
T0: 00%
T1: 12%
T2: 25%
T3: 37%
T4: 50%
*T5: 62%
T6: 75%
T7: 87%
plaptop root # echo -n "0" > /proc/acpi/processor/CPU0/throttling ; cat /proc/acpi/processor/CPU0/throttling
state count: 8
active state: T4
states:
T0: 00%
T1: 12%
T2: 25%
T3: 37%
*T4: 50%
T5: 62%
T6: 75%
T7: 87%
plaptop root #
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My /proc/cpuinfo:
| Code: | processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 9
model name : Intel(R) Pentium(R) M processor 1400MHz
stepping : 5
cpu MHz : 1395.638
cache size : 1024 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 tm pbe tm2 est
bogomips : 2778.72
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Any suggestions would be very much appreciated... this is driving my crazy.  I am on AC if that matters btw.
Thanks!
--Pritpaul |
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mr-simon
Guru
Joined: 22 Nov 2002
Posts: 367
Location: Leamington Spa, Warks, UK
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| Posted: Thu Aug 19, 2004 2:27 pm Post subject: |
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Do you have the battery in the machine?
I have a thinkpad and it won't let me run at full speed unless I'm both plugged into AC, and have the battery in. I'm not quite sure about the reasoning for this, but it seems to be the case.
Also, is there anything in dmesg that might indicate why throttling is being enforced? Maybe you're running too hot?
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