Skip to contentSkip to conversation

how to set ondemand governor

DISCUSSION Nebojsa Trpkovic 3 participants 3 messages Aug 6, 2007 – Aug 7, 2007

lore
Share & tools
lore

Nebojsa Trpkovic

author
#0 lore raw

I've got Core 2 Duo CPU and tried to set ondemand governor. result that I've got shows that only one core is affected:

Quoted 48 lines

titan old # echo -n "ondemand" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor titan old # cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Duo CPU E6550 @ 2.33GHz
stepping : 11
cpu MHz : 2000.000
cache size : 4096 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
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 ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips : 4669.25
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 15
model name : Intel(R) Core(TM)2 Duo CPU E6550 @ 2.33GHz
stepping : 11
cpu MHz : 2333.000
cache size : 4096 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
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 ht tm syscall nx lm constant_tsc pni monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr lahf_lm
bogomips : 4666.81
clflush size : 64
cache_alignment : 64
address sizes : 36 bits physical, 48 bits virtual
power management:

Quoted 1 line

titan old #

does this mean that I should (and can) set different governors/variables for different cores of my CPU ?

#1 lore raw
Quoted 4 lines · Nebojsa Trpkovic

I've got Core 2 Duo CPU and tried to set ondemand governor. result that I've got shows that only one core is affected:

Quoted 1 line

titan old # echo -n "ondemand" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

Note that the path you're echoing into contains 'cpu0'...

Quoted 2 lines

does this mean that I should (and can) set different governors/variables for different cores of my CPU ?

I suppose you can, but its a little batty (never actually tried myself). In fedora-land, we have an initscript that defaults to setting ondemand for all cpus. Part of the setup is to essentially echo 'ondemand' into the scaling_governor sysfs file for each cpu on the system.

Signature · 2 lines
Jarod Wilson
[email protected]

_______________________________________________
Cpufreq mailing list
[email protected]
http://lists.linux.org.uk/mailman/listinfo/cpufreq