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Re: Object graphics under Linux: are they supposed to be that slow? [message #29053 is a reply to message #29043]

Mon, 28 January 2002 17:55

Mark Hadfield
Messages: 783
Registered: May 1995

Senior Member

"Steve Smith<steven_smith>" <nobody@nowhere.com> wrote in message
news:slrna5be3l.qih.nobody@pooh.nrel.gov...
> Hi Mark:
> I'm not sure I've the answer for you, but I suspect that the big
difference
> is in the graphics subsystem, the windows more than likely supporting the
> hardware acceleration and Linux (XFree I'm assuming) not....

I have had email responses from a few people. They tell me that IDL 5.5 on
Linux does not use the system's OpenGL drivers even if they are available.
This is because in RSI's judgement the hardware support on Linux is (as you
note) rather flaky. This is likely to change in future versions.

I suspect that on my system the graphics driver is so crippled that hardware
rendering would not help IDL much. It doesn't make much difference under
Windows. Windows describes the graphics controller as an "Intel 810 Graphics
Controller Hub" with 4MB memory. That doesn't sound like much video RAM,
does it? However I believe the Intel 810 can access system RAM. Anyway, it's
quite possible that performance would improve significantly if I reduced the
screen resolution. I will look into this and report back to the group.

> I don't know what your reasons for moving to Linux were...

I'm not sure myself! Better integration with other Unix systems mostly. I
haven't really moved to Linux yet, just dipped my toe in the water and run
back shivering. I haven't yet got my Linux setup to the stage where I can
actually do productive work with it.

---
Mark Hadfield
m.hadfield@niwa.co.nz http://katipo.niwa.co.nz/~hadfield
National Institute for Water and Atmospheric Research

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[Message index]

		Re: Object graphics under Linux: are they supposed to be that slow? By: David Fanning on Tue, 29 January 2002 20:55
		Re: Object graphics under Linux: are they supposed to be that slow? By: Mark Hadfield on Tue, 29 January 2002 19:00
		Re: Object graphics under Linux: are they supposed to be that slow? By: nobody@nowhere.com (S on Tue, 29 January 2002 08:25
		Re: Object graphics under Linux: are they supposed to be that slow? By: Mark Hadfield on Mon, 28 January 2002 17:55
		Re: Object graphics under Linux: are they supposed to be that slow? By: nobody@nowhere.com (S on Mon, 28 January 2002 12:38
		Re: Object graphics under Linux: are they supposed to be that slow? By: marc schellens[1] on Mon, 28 January 2002 11:33
		Re: Object graphics under Linux: are they supposed to be that slow? By: karl_schultz on Wed, 30 January 2002 10:23

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