Re: [SLUG] Improving Xserver preformance

From: Mario Lombardo (mario@alienscience.com)
Date: Sat Aug 28 2004 - 16:25:14 EDT


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As I understand it, X was designed from the ground up to run over a slow
mainframe-based net, like IBM Token-Ring 4Mbps LAN or maybe a 9600 baud
hard-line WAN. Of course in those days, window managers and X had less to
do.

/mario

On Saturday 28 August 2004 15:45, you as Eben King wrote:
> On Sat, 28 Aug 2004, Robert Snyder wrote:
> > Well after playing around with the demos for all the major Commerical
> > Windows Xservers... ended up picking up eXceed for just over 60
> > dollars under an educational licence. While it feels the fastest
> > out of them all. I need to figure out where I am having a bottleneck.
> >
> > Windows side
> >
> > P4 2.4ghz
> > 768 megs DDR 333
> > GF2 Pro 64 meg DDR ( I just dont play alot of games )
> > Broadcom Net Extreme Gigabit Nic connected to a WET11 Wireless to
> > Eithernet Bridge (802.11B)
> > Windows XP Professional SP2
> >
> > Server
> > P3 500E ( socket 370 not Slot 1)
> > i810 Chipset with on board 4 megs video memory not shared.
> > 192 Megs pc 100
> > Linksys WMP11 The orginal with the Prism 2.5 chipset.
> > Suse 9.1 Professional
> >
> > Now I trying to figure out where my bottle net could be.
>
> IME it's the latency that gets to it. X apps are used to running locally,
> where if the app asks the X server something, it can get an answer in
> microseconds. Then you're trying to run X on a LAN machine (worse, one
> connected by 802.11b, a half-duplex protocol), where the latency is
> measured in milliseconds (1000 times greater). I used to run Mozilla
> (when I _had to_) from a machine in Gainesville (latency of dozens of ms).
> It took about three minutes to start up, but once it was up it was not
> obnoxiously slow.
>
> I don't know what you could do to improve that, besides simplifying the X
> protocol.
>
> > I tried putting in more ram into the server and even though i have the
> > correct ram ( speed and timing ratio) the board is just plan old
> > picky SOB....
>
> I don't think it would matter how fast either end is, or how fat the pipe
> in between is (the machine in Gainesville was on a 100 Mbps LAN a couple
> hops from an OC-12, I am on a 100 Mbps LAN one hop from a cable modem),
> but rather the end-to-end time.
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