How is run queue length computed in linux proc filesystem

[emani murali]

Hi,

I'm trying to obtain number of runnable processes from linux kernel. sar -q
gives this information readily. However I'm trying to get this value from
/proc filesystem. There is no file in /proc that gives this value directly,
then how is runq-sz computed.

The wiki page http://en.wikipedia.org/wiki/Load_(computing) provides some
insight into how run queue length is computed based on ldavg values but it
is unclear. Can someone provide more pointers on this. Cheers

Thanks,
Kris
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