Generally, I do not think it is possible or will ever be possible by
using cgroup parameters only, because:
a) Kernel does not care much about CPU frequency, it often determines it
incorrectly, and the frequency itself changes often in a live system
because of power management and various other technologies. Even with
special tests it is not easy to determine exact frequency the CPU is
capable of sustaining.
b) Frequency does not define performance in real tasks. Your 3 GHz CPU
is not necessary 1.5 faster than your old 2 GHz one, and this figure
depends very much on your task.
That said, I think it is possible to solve your problem indirectly, by
rewriting configs automatically on boot based on bogomips or some other
benchmark.
--
With Best Regards,
Marat Khalili
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