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    SubjectRe: [RFC] [PATCH] [2.5.35] Run Queue Statistics
    Rik van Riel wrote:
    >
    > On Tue, 17 Sep 2002, Anton Blanchard wrote:
    >
    > > On a semi related note, vmstat wants to know the number of running,
    > > blocked and swapped processes. strace vmstat one day and you will see it
    > > currently opens /proc/*/stat (ie one open for each process) just to get
    > > these stats. Yet another place where the monitoring utilities disturb
    > > the system way too much.
    > >
    > > Can we get some things in /proc/stat to give us these numbers? Does
    > > "swapped" make any sense on Linux?

    Certainly sounds good. Opening every /proc/<pid>/stat is gross.

    > Runnable can be done currently, blocked on IO is trivial once
    > Andrew has pushed the iowait stats to Linus.
    >

    That'll be a while off yet. I'd like to make sure that we have
    all the externally visible changes stable for a week or so,
    /proc/diskstats settled down, userspace updated and tested etc.

    Just to minimise the disruption and churn which these changes
    will cause.
    -
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