Package: cpufrequtils
Version: 002-5
On the Core 2 Duo machines I have installed cpufrequtils on, the init
script says the following:
CPUFreq Utilities: Setting ondemand CPUFreq
governor...CPU0...CPU0...done.
As a result, one core uses ondemand and the other uses performance,
which is sub-optimal.
[burly(~)] cpufreq-info
cpufrequtils 002: cpufreq-info (C) Dominik Brodowski 2004-2006
Report errors and bugs to [EMAIL PROTECTED], please.
analyzing CPU 0:
driver: acpi-cpufreq
CPUs which need to switch frequency at the same time: 0
hardware limits: 1000 MHz - 2.00 GHz
available frequency steps: 2.00 GHz, 1.83 GHz, 1.67 GHz, 1.50 GHz,
1.33 GHz, 1000 MHz
available cpufreq governors: ondemand, performance
current policy: frequency should be within 1000 MHz and 2.00 GHz.
The governor "ondemand" may decide which speed to use
within this range.
current CPU frequency is 1000 MHz.
analyzing CPU 1:
driver: acpi-cpufreq
CPUs which need to switch frequency at the same time: 1
hardware limits: 1000 MHz - 2.00 GHz
available frequency steps: 2.00 GHz, 1.83 GHz, 1.67 GHz, 1.50 GHz,
1.33 GHz, 1000 MHz
available cpufreq governors: ondemand, performance
current policy: frequency should be within 1000 MHz and 2.00 GHz.
The governor "performance" may decide which speed to
use
within this range.
current CPU frequency is 2.00 GHz.
This is because the init script is using the 'processor' field in
/proc/cpuinfo to locate the CPUs, which seems to enumerate packages or
dies rather than cores.
[burly(~)] grep '^processor' /proc/cpuinfo
processor : 0
processor : 0
[burly(~)] grep '^physical id' /proc/cpuinfo
physical id : 0
physical id : 0
Possible solutions:
1. Use the 'core id' field in /proc/cpuinfo. I don't know how
backward-compatible to previous kernel versions this is.
[burly(~)] grep '^core id' /proc/cpuinfo
core id : 0
core id : 1
2. Enumerate the sysfs attributes directly.
[burly(~)] grep ^ /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
/sys/devices/system/cpu/cpu0/cpufreq/scaling_governor:ondemand
/sys/devices/system/cpu/cpu1/cpufreq/scaling_governor:ondemand
3. Ask cpufreq-info.
[burly(~)] cpufreq-info -o | grep ^CPU
CPU 0 1000000 kHz ( 50 %) - 2000000 kHz (100 %) - ondemand
CPU 1 1000000 kHz ( 50 %) - 2000000 kHz (100 %) - ondemand
Regards,
--
Paul Collins
Wellington, New Zealand
Dag vijandelijk luchtschip de huismeester is dood
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