>
> I used collectl to collect context switching rate in summary mode on a 24
> core machine (12 physical + hyper-threading). It reported high numbers of
> context switches (20k+ spikes).
>
> My question is : What kind of context switches does collectl measure? Is it
> user space to kernel space context switches, i.e. when making system calls or
> multiple threads contending on one core?
>
> I could not find this information in the documentation. The tool
> documentation only says : Total number of context switches/sec. Shall I
> assume its measuring aggregate of user and kernel space context switches?
> Appreciate any help.
>
>
> Thanks,
> Bhaskar
>
> Principal Software Engineer
> http://www.SpaceCurve.com
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