On Tue, 15 May 2018 19:59:53 -0600 JD <jd1...@gmail.com> wrote: > # /bin/cpupower --cpu all frequency-set -g performance 2G > # /bin/cpupower --cpu all frequency-info | grep "current CPU > frequency is" current CPU frequency is 2.80 GHz (asserted by call to > hardware). current CPU frequency is 2.80 GHz (asserted by call to > hardware). > > Cpu can accept frquencies as low as 800MHz. > > So, does anyone have a more magical incantation to force the 2 cores > to run at 2.0 GHz?
You could try adding --max? I'm not sure what the default is, might be --min. When governor is set to performance, the CPU runs full out all the time. It is possible to change the governor on a running system, but I'm not sure how. You could change it to one of the below other than performance, if it has been compiled into the kernel. As you can see, I have only the ondemand governor in my kernel. These are the settings for my CPU, from boot/config-[] # DEVFREQ Governors CONFIG_DEVFREQ_GOV_SIMPLE_ONDEMAND=y # CONFIG_DEVFREQ_GOV_PERFORMANCE is not set # CONFIG_DEVFREQ_GOV_POWERSAVE is not set # CONFIG_DEVFREQ_GOV_USERSPACE is not set # CONFIG_DEVFREQ_GOV_PASSIVE is not set Also, IIRC, the setting of CPU frequency is usually done directly in the BIOS / firmware. In the kernel docs they say that some CPUs can't be set from the kernel (but don't give a list). i.e. the BIOS would be your only option if you have one of those, and it sounds like you might. _______________________________________________ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org
