I'm using collectl to collect context switching rates 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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