On Sat, 8 Apr 2017 10:27:04 -0400 Gene Heskett <ghesk...@shentel.net> wrote:
> > Unforch the kernel, Linux raspberrypi 4.4.4-rt9-v7+ #7 SMP PREEMPT RT, is > currently locked because its an rt-prempt kernel, absolutely needed for > the target application, which is LinuxCNC. Is there a newer kernel with > those irq response time mods? The "standard" and lowlevel way is to look in this directory: /sys/devices/system/cpu/cpu0/cpufreq/ They are not real files, but just a way to ask to kernel the information you need. From a terminal, as superuser, you can check min and max clock speed (# -> is the terminal prompt): # cd /sys/devices/system/cpu/cpu0/cpufreq/ # cat scaling_min_freq # cat scaling_max_freq To see the current speed: # cat scaling_cur_freq I also recommend to use the "performance" scaling governor, so the cpu is always at max speed (scaling_max_freq). ie: # echo "performance" > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor I hope it helps. Some more informations are found at this page: https://wiki.debian.org/HowTo/CpuFrequencyScaling -- Diego Roversi <die...@tiscali.it>
