CODEWITHSUNDEEP
androidperformancecpu
Mike Lee
Mike Lee

Reputation: 1215

Android CPU info under /sys/devices/system/cpu

I want to look into android CPU perf and became curious over this:

why under /sys/devices/system/cpu/cpu0/ there are these information:

cpufreq/   online     rq-stats/  topology/  
cpuidle/   power/     subsystem/ uevent

but under /sys/devices/system/cpu/cpu1/ or cpu2, cpu3 directory, there are only these info:

cpuidle/   online     power/     subsystem/ uevent

I would imagine each directory (cpu0-3) represent each core. But why are there no information about, for example cpu frequency, for cpu1-3 ?

Upvotes: 1

Views: 1529

Answers (1)

Yachao
Yachao

Reputation: 37

You just list the answer---cpufreq/, open it, and you'll see 

cpuinfo_max_freq

In some devices, there is only one cpuinfo_max_freq file.

Otherwise, compare them, and take the max.

Upvotes: 1

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