|
Edited by loboris at 2015-7-23 19:20
Even with heatsink, CPU overheats and one or more cores goes off.
Only heatsink with fun ensures full speed cool run.
If the kernel is compiled with CONFIG_SUNXI_BUDGET_COOLING=y option (default), max frequency after some time is limited to 1.2GHz no matter how cool cpu is running.
With heatsink+fun and kernel compiled with CONFIG_SUNXI_BUDGET_COOLING is not set option I was able to get cool operation with all 4 cores on at 1.53 GHz
After 2 days running with average 60% CPU usage (Ubuntu Vivid):
orangepi@OrangePI:~$ nproc
4
orangepi@OrangePI:~$ cat /sys/devices/system/cpu/online
0-3
orangepi@OrangePI:~$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq
1536000
orangepi@OrangePI:~$ cat /sys/class/thermal/thermal_zone0/temp
32
orangepi@OrangePI:~$ cat /sys/class/thermal/thermal_zone1/temp
30
orangepi@OrangePI:~$
nproc
Print the number of processing units available to the current process,
which may be less than the number of online processors
|
|