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Date: Wed, 6 Mar 2002 17:06:14 -0300 (BRT)
From: Rik van Riel <riel@conectiva.com.br>
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To: "Richard B. Johnson" <root@chaos.analogic.com>
Cc: Dario Bahena Tapia <dario.bahena@correo.unam.mx>,
        <linux-c-programming@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: Re: getting process i/o wasted time ...
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On Wed, 6 Mar 2002, Richard B. Johnson wrote:

> Time for I/O is not generally "wasted" as you say. It is given to
> other tasks. Of course if there are no other tasks that want the
> CPU then, I guess, you could call it wasted.

I guess it may be useful to measure IO wait time in the
kernel, where IO wait time is defined as:

1) a CPU is idle

2) there are processes in D state

regards,

Rik
-- 
"Linux holds advantages over the single-vendor commercial OS"
    -- Microsoft's "Competing with Linux" document

http://www.surriel.com/		http://distro.conectiva.com/

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