Thomas Renninger wrote: > That's very interessting. > Could you please compare the supported C-states on the machines. I bet it > is related to those.
I have just installed 10.0-beta4 on the Pentium-M laptop and I noticed that something seems to have gotten a little bit worse. Before, when Powersave scheme was enabled, the processor was mainly on C3. Now it almost never leaves C2, according to /proc/acpi/processor/CPU0/power: active state: C2 max_cstate: C8 bus master activity: 11108888 states: C1: type[C1] promotion[C2] demotion[--] latency[001] usage[00000010] *C2: type[C2] promotion[C3] demotion[C1] latency[001] usage[01143473] C3: type[C3] promotion[--] demotion[C2] latency[085] usage[00000019] speedstep_centrino module is loaded on the Pentium-M machine. The Celeron laptop never enters C3, but this doesn't seem to influence the battery life (which is the same as in Windows). > Please also have a look at "cat /proc/sys/kernel/HZ". On both system its 1000 Hz. Doesn't the 'desktop' kernel parameter lowers the clock frequency to 100 Hz? > Theoretically it could also be throttling, but I doubt it: > cat /proc/acpi/processor/*/throttling or powersave -T > You could increase allowed throttling, if the machine is idle using the > powersave daemon. Default is 50% throttling after 10 seconds idle time > (also for performance scheme?) I have already tried setting the maximum throttling allowed to 87%. Since in my experiment the system is always in scheme_powersave, it is not relevant to change this setting in scheme_performance. Mark _______________________________________________ powersave-devel mailing list [email protected] http://forge.novell.com/mailman/listinfo/powersave-devel
