X, Network transparency and ssh

[Peter]

On Thu, 12 Jan 2006, Robert Brockway wrote:

> Hi all.  During the talk last night a question arose about streaming all of 
> the graphical data to a thin client via ssh.  As noted last night this can be 
> very cpu intensive.  I'm running a test at the moment that demonstrates this 
> well.
>
> I'm currently running xawtv[1] over ssh to a thin client.  Xawtv is comsuming 
> 56% cpu constantly on an Athlon-800 (avon).  Nothing else is happening on 
> avon.  This gives an idea of how cpu intensive running even a single 
> graphically intensive app via ssh can be.
>
> [1] tvtime refuses to start.  A bit of RTFM suggests that the tvtime author 
> doesn't support remote display with tvtime.  This is a bit of a shame.  I 
> think I'll have to bend his ear a bit :)

tv and similar high speed display programs use X server extensions which 
allow the client to write directly (DMA-like on the PCI bus) to the 
screen. This requires that the display/server be local to the 
application. Try xawtv -remote meanwhile ?

Peter
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