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