[ut2003io] Performance under Linux

[Eric Lathrop]

Apparently I'm not getting AGP memory allocated.

----UT2003.log----
Init: WARNING: Couldn't allocate AGP memory - turning off support for
GL_NV_vertex_array_range
Init: WARNING: This has a serious impact on performance.
----end-UT2003.log----

I've suspected this (because a "cat /proc/driver/nvidia/agp/status") gives
me "Status: Disabled"), but I still get a whole pile of frames/sec so I've
never investigated it further.

Any ideas on how to enable it?

  --Eric Lathrop

> Check your log file to see whether UT2k3 successfully managed to
> allocate AGP memory.
> 
> -- Daniel, Epic Games Inc.
> 
> > -----Original Message-----
> > From: Pascal Lalonde [mailto:plalonde at overnet.qc.ca]
> > Sent: Saturday, October 19, 2002 5:03 PM
> > To: ut2003 at icculus.org
> > Subject: [ut2003io] Performance under Linux
> >
> >
> >
> > Hi,
> >
> > after reading a few messages from the archives, I realized that my low
> > performance with ut2003 on Linux is far from what it could be.
> >
> > I noticed some messages where people say they get ~50FPS on Linux,
> > with something like an Athlon and GeForce2Pro. This is similar to my
> > system, though I get only 10-15FPS, (or 20-40 when there is no action,
> > or when facing an empty wall).
> >
> > My system is:
> > Athlon 1.2gHz
> > 256MB PC2100DDR
> > ASUS V7100MAGIC (GeForce2 w 32MB)
> > A7A266 motherboard (with the M1647 chipset)
> >
> > At first I thought it could be because of my AGP (because the nvidia
> > driver disables AGP when faced with an M1647), which by default is
> > disabled under both Win32 and Linux (according to the ut2003 logfile).
> > Under windows, I didn't find a way to override this, but under Linux,
> > they say you can modify a flag in the source code to enable AGP anyway
> > at your own risk. That's what I did, and I managed to run the game
> > with AGP enabled at 1x (2x and 4x simply freeze my system). But I
> > still get 10-15FPS most of the time (in 640x480, low details).
> >
> > One strange thing though: they say that AGP is a crucial component and
> > without it the game will be very slow. Yet, under Windows, I get
> > 30-60FPS, even *without* AGP, while on Linux I get my 10-15FPS *with*
> > AGP. I don't mean to do the usual apple vs. orange comparison, but
> > this is such a gap that I'm thinking there is something I do really
> > wrong.
> >
> > I thought it could've been because ut2003 writes some temporary files
> > to my home dir, and since my home partition is NFS-mounted, it was
> > slowing me down. But I get the same results using an ext3 fs.
> >
> > I tried playing a little with the UT2003.ini, with things like
> > UseTripleBuffering, UseHardwareVS, etc. But since my performance was
> > altered with barely a +2-3 FPS, I set everything back to default.
> >
> > Any success stories with a similar system?
> >
> > (I run the demo, for now. I use kernel 2.4.19, with agpgart builtin.
> > I run Debian-testing, with libsdl 1.2.4-1)
> >
> > Thanks,
> > Pascal Lalonde
> >
>