Florian Ermisch wrote:
Jürgen Keil schrieb:
Right now cpu is clocked to the max frequency but the system is idling
and 'cpupm' is enabled by /etc/power.conf:
...
ash-3.2$ kstat -p cpu_info:::current_clock_Hz
cpu_info:0:cpu_info0:current_clock_Hz 2000000000
cpu_info:1:cpu_info1:current_clock_Hz 2000000000
What are the supported cpu frequencies (supported_frequencies_Hz) that
the kernel did find for this system?
kstat -p cpu_info:::supported_frequencies_Hz
bash-3.2$ kstat -p cpu_info:::supported_frequencies_Hz
cpu_info:0:cpu_info0:supported_frequencies_Hz
1000000000:1333000000:1667000000:2000000000
cpu_info:1:cpu_info1:supported_frequencies_Hz
1000000000:1333000000:1667000000:2000000000
It seems the different frequencies are available but not used..
I noticed a similar issue on my Tecra M5 when going from builds 109 to
builds 110 and 111. powertop would say that the cpu would be running at
1GHz but kstat would stay it was still at 1830000000
I stumbled upon an internal Solaris Nevada bug (CR# 6818514) that was
created for ATOM processors showing the same thing that suggests using:
cpupm enable poll-mode
Setting this on my M5 seems to cause the CPU to cycle down as expected.
Might be related.
-Phil
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