Thanks for the hints. My results above are all while running at 800MHz, and without touching the fdt or the cpufreq driver I thinks that’s all I can get:
root@cb-88f3720-ddr3-expbin:~# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies
133333 200000 400000 800000
root@cb-88f3720-ddr3-expbin:~# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_max_freq
I’m somewhat reluctant to overclock the board, as it is the only one I have currently ;).
Regarding the affinity settings, I used mainly the interrupt distribution shown in /proc/interrupts for checking if I get any effects. Since I cannot split the interrupt handling for the interfaces or for rx/tx , I can only shift all of the network handling to cpu1, which the github commit you mentioned above does. I tried it during my test, but setting the smp_affinity to 1, 2 or 3 did not make a real difference.