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From: (bill davidsen)
Subject: Re: [Lse-tech] [patch 2.6.0-test1] per cpu times
Date: 23 Jul 2003 21:50:42 GMT	[thread overview]
Message-ID: <bfmvvi$lba$> (raw)

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.

  parent reply	other threads:[~2003-07-23 21:43 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-07-18 16:35 [patch 2.6.0-test1] per cpu times Erich Focht
2003-07-18 18:18 ` [Lse-tech] " Mike Kravetz
2003-07-18 19:57   ` William Lee Irwin III
2003-07-18 20:53     ` Rick Lindsley
2003-07-21  4:47   ` Peter Chubb
2003-07-23 21:50   ` bill davidsen [this message]
2003-07-23 23:32     ` Peter Chubb

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