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From: Nick Piggin <piggin@cyberone.com.au>
To: Albert Cahalan <albert@users.sourceforge.net>
Cc: linux-kernel mailing list <linux-kernel@vger.kernel.org>
Subject: Re: decaying average for %CPU
Date: Fri, 17 Oct 2003 12:56:19 +1000	[thread overview]
Message-ID: <3F8F5A53.50209@cyberone.com.au> (raw)
In-Reply-To: <1066358155.15931.145.camel@cube>



Albert Cahalan wrote:

>The UNIX standard requires that Linux provide
>some measure of a process's "recent" CPU usage.
>Right now, it isn't provided. You might run a
>CPU hog for a year, stop it ("kill -STOP 42")
>for a few hours, and see that "ps" is still
>reporting 99.9% CPU usage. This is because the
>kernel does not provide a decaying average.
>

I think the kernel provides enough info for userspace to do
the job, doesn't it?



  reply	other threads:[~2003-10-17  2:58 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-10-17  2:35 Albert Cahalan
2003-10-17  2:56 ` Nick Piggin [this message]
2003-10-17  3:00   ` Albert Cahalan
2003-10-17  3:21     ` Nick Piggin
2003-10-17  4:17       ` Albert Cahalan
2003-10-17 22:48         ` Nick Piggin

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