Re: [Lse-tech] [patch 2.6.0-test1] per cpu times

From: bill davidsen (
Date: Wed Jul 23 2003 - 16:50:42 EST

In article <>,
Mike Kravetz <> wrote:

| On a somewhat related note ...
| We (Big Blue) have a performance reporting application that
| would like to know how long a task sits on a runqueue before
| it is actually given the CPU. In other words, it wants to
| know how long the 'runnable task' was delayed due to contention
| for the CPU(s). Of course, one could get an overall feel for
| this based on total runqueue length. However, this app would
| really like this info on a per-task basis.

This is certainly a useful number. It's easy to tell when the CPU is "in
use," but it's not easy to tell when it's "busy" and processes are
waiting for a CPU.

bill davidsen <>
  CTO, TMR Associates, Inc
Doing interesting things with little computers since 1979.
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