[CentOS-virt] No cpu throttling for Xeon E5405?
Dennis J.
dennisml at conversis.de
Fri May 22 22:57:19 UTC 2009
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
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