Message-ID: <3F385633.3090807@cyberone.com.au>
Date: Tue, 12 Aug 2003 12:51:31 +1000
From: Nick Piggin <piggin@cyberone.com.au>
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To: rob@landley.net
CC: Con Kolivas <kernel@kolivas.org>,
       linux kernel mailing list <linux-kernel@vger.kernel.org>,
       Andrew Morton <akpm@osdl.org>, Ingo Molnar <mingo@elte.hu>,
       Felipe Alfaro Solana <felipe_alfaro@linuxmail.org>
Subject: Re: [PATCH] O13int for interactivity
References: <200308050207.18096.kernel@kolivas.org> <200308052022.01377.kernel@kolivas.org> <3F2F87DA.7040103@cyberone.com.au> <200308110248.09399.rob@landley.net>
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Rob Landley wrote:

>On Tuesday 05 August 2003 06:32, Nick Piggin wrote:
>
>
>>But by employing the kernel's services in the shape of a blocking
>>syscall, all sleeps are intentional.
>>
>
>Wrong.  Some sleeps indicate "I have run out of stuff to do right now, I'm 
>going to wait for a timer or another process or something to wake me up with 
>new work".
>  
>
>
>Some sleeps indicate "ideally this would run on an enormous ramdisk attached 
>to gigabit ethernet, but hard drives and internet connections are just too 
>slow so my true CPU-hogness is hidden by the fact I'm running on a PC instead 
>of a mainframe."
>

I don't quite understand what you are getting at, but if you don't want to
sleep you should be able to use a non blocking syscall. But in some cases
I think there are times when you may not be able to use a non blocking call.
 
And if a process is a CPU hog, its a CPU hog. If its not its not. Doesn't
matter how it would behave on another system.


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