procfs - How is run queue length computed in linux proc filesystem -


i'm trying obtain number of runnable processes linux kernel. sar -q gives information readily. i'm trying value /proc filesystem. there no file in /proc gives value directly, how runq-sz computed. wiki page http://en.wikipedia.org/wiki/load_(computing) provides insight how run queue length computed based on ldavg values unclear. can provide more pointers on this. cheers

as gcla said cat use 

cat /proc/loadavg

to read loadavarage from kernel - strictly speaking, not queue length.

take @ 

grep procs_running /proc/stat

and

grep procs_blocked /proc/stat

first actual running queue , second number of process blocked on disk io. load average function sum of both.


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