Clever Geek Handbook

How do I get the real cpu frequency while the system is running?

Due to Intel Turbo Boost technology, I cannot trust the processor frequency recorded on the chip. I want to get the real cpu frequency while the system is running. I was looking for what device cpufreq

can help. But dev.cpu.n.freq

only received support dev.cpu.0.freq

.

There are no other OIDs like dev.cpu.1.freq

or dev.cpu.n.freq

.

Is there any useful tool to see the cpu frequency right away?

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1 answer


For the lack of dev.cpu.N.freq

sysctl for N> 0, see the BUGS section cpufreq(4)

:

When multiple processors offer frequency control, they cannot be set to different registers, and they must all have the same frequency settings.



This is why only CPU 0 is reported.

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