On 05/10/2011 04:57:05 PM, Sebastian Beßler wrote: > Am 10.05.2011 16:49, schrieb Helmut Jarausch: > > > And that tells me that the CPU is running at full speed (3 GHz in > my > > > case) although all CPUs are idle. > > What does > cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor > and > cat /sys/devices/system/cpu/cpu0/cpufreq/ > scaling_available_frequencies > and > cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors > say? >
I have tried echo "ondemand" > /sys/devices/system/cpu/cpu0/cpufreq/ scaling_governor and now I see an effect but not as good as powernowd e.g. I have stopped processed temporarily so that the CPU usage fell down to 1% (max). Still after waiting some minutes, only one core scaled down to 800 MHz and a a second one to 2.3 GHz. At least, powernowd it much more "agressive". If some cores are idle for a few seconds it scales these down stepwise to the lowest frequency. Helmut.
