grep Posted December 2, 2017 Posted December 2, 2017 Hi! Could you please clarify, is there a way to increase default limitations for max cpu freq (H5) on Orange Pi Prime? As i understand, according to driver (cpufreq-dt): Quote available frequency steps: 408 MHz, 648 MHz, 816 MHz, 912 MHz, 960 MHz, 1.01 GHz /etc/default/cpufrequtils is a bit less restrictive: Quote cat /etc/default/cpufrequtils ENABLE=true MIN_SPEED=408000 MAX_SPEED=1296000 GOVERNOR=ondemand Is this a driver limitation ? Or there is a way to increase cpu-freq, but it's not used by default ? ( ... and why, if it is so ?) Quote uname -a Linux orangepiprime 4.13.14-sunxi64 #246 SMP Mon Nov 20 01:58:09 CET 2017 aarch64 aarch64 aarch64 GNU/Linux
Igor Posted December 3, 2017 Posted December 3, 2017 Those number might be set higher later when the kernel is well tested and thermal protection working as it should. You don't want to burn your board, do you?
grep Posted December 3, 2017 Author Posted December 3, 2017 @Igor i put a 19x19x24 small-tower-like radiator for CPU (not too effective, but the best ones i got without "manual working with saw & rasp") and 9x9x12 for each mem + ethernet chips. So if you give me link to testing guide i could try. Of course, i suppose you have "well-defined QA-procedures" and "sporadic results from unknown guys" is not a too good idea, but ... maybe, i just want to burn my board As i "understood" (i guess) from "brief search" the problem is with setting correct DVFS levels (voltage + frequency/throttling) to keep system stable. Simple FREQ=1008Mhz testing with Quote grep@orangepiprime:~$ stress -t 900 -c 2 -m 2 -i 2 -d 2 stress: info: [8154] dispatching hogs: 2 cpu, 2 io, 2 vm, 2 hdd stress: info: [8154] successful run completed in 910s gave [max...min] = [45..49.1] (don't ask about median/avg/quantiles, it was just watching at "armbianmonitor -m" output); normal temp (non-idle, 1.25..2 LA) is ~35..37 P.S. PSU is 5V / 3A of course.
Recommended Posts