Dennis J. wrote:> Hi,
> we bought some machines with 2 x quad core Xeon E5405 processors and
> installed centos 5.3 on them. My problem is that I can't get the
cpuspeed
> service to work. No driver seems to claim responsibility for the throttling
> and the fallback "modprobe acpi_cpufreq" in the cpuspeed init
script just
> yields a "No such device" message. According to the acpi
information the
> CPUs should support this just fine:
>
> cat /proc/acpi/processor/CPU0/info:
> processor id: 0
> acpi id: 0
> bus mastering control: yes
> power management: no
> throttling control: yes
> limit interface: yes
>
> cat /proc/acpi/processor/CPU0/throttling:
> state count: 8
> active state: T0
> states:
> *T0: 00%
> T1: 12%
> T2: 25%
> T3: 37%
> T4: 50%
> T5: 62%
> T6: 75%
> T7: 87%
>
> At least half of the cores aren't really used at the moment under
non-peak
> load so we are wasting quite a bit of power with this. Any idea on how to
> get this working?
>
> Regards,
> Dennis
FYI, throttling is not the same as frequency scaling. If your CPU is throttling
it usually means it's overheating.
Glenn