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From: Daniel Phillips <phillips@bonn-fries.net>
To: "David S. Miller" <davem@redhat.com>, bcrl@redhat.com
Subject: Re: aio
Date: Thu, 20 Dec 2001 08:27:45 +0100
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On December 20, 2001 06:39 am, David S. Miller wrote:
>    From: Benjamin LaHaise <bcrl@redhat.com>
>    Date: Wed, 19 Dec 2001 22:47:17 -0500
>    An X server that doesn't have to make a syscall to find out that
>    more data has arrived?
> 
> Who really needs this kind of performance improvement?  Like anyone
> really cares if their window gets the keyboard focus or a pixel over a
> AF_UNIX socket a few nanoseconds faster.  How many people do you think
> believe they have unacceptable X performance right now and that
> select()/poll() syscalls overhead is the cause?  Please get real.

I care, I always like faster graphics.

> People who want graphics performance are not pushing their data
> through X over a filedescriptor, they are either using direct
> rendering in the app itself (ala OpenGL) or they are using shared
> memory for the bulk of the data (ala Xshm or Xv extensions).

You're probably overgeneralizing.  Actually, I run games on my server and 
display the graphics on my laptop.  It works.  I'd be happy if it was faster.

I don't see right off how AIO would make that happen though.  Ben, could you 
please enlighten me, what would be the mechanism?  Are other OSes doing X 
with AIO?

--
Daniel

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