Angus Dorbie (dorbie++at++bitch.reading.sgi.com)
Mon, 23 Sep 1996 09:35:06 +0100
You do have support don't you?
Angus.
On Sep 20, 3:04pm, Tinker, Peter wrote:
> Subject: RE: Texture Memory problems on iR
> Angus writes of patch 1355. Where can I get it?
>
> - Pete Tinker
> Hughes Research Labs
> _______________________________________________________________________________
> From: Angus Dorbie on Fri, Aug 16, 1996 9:02 AM
> Subject: Re: Texture Memory problems on iR
> To: WDea++at++swri.edu; info-performer++at++sgi.com
>
> Sounds like your creating new textures for your movie and hoping that the
> texture memory management will handle things for you.
>
> There are problems with this unless you have iR second software release
> now in beta test (patch 1355).
>
> Are you able to try something like pfTexLoadImage on the same texture
> instead of using multiple textures?
>
> Rgds,
> Angus.
>
>
> On Aug 16, 9:46am, WDea++at++swri.edu wrote:
> > Subject: Texture Memory problems on iR
> >
> > My program basically plays one movie after another for a long period of
> time.
> > This is accomplished by changing the texture on a polygon for each new
> > frame of the movie. It is supposed to run a 30 frames per second, and at
> the
> > beginning it does. Unfortunately, after a few of these movies have played
> > it slows down to 5 frames per second for no apparent reason. If I use an
> > internal format with 32 bit texels, this slowdown happens after
> > approximately 8 movies (including several frames/movie) have been loaded
> > and played. If I change it to use 16 bit texels it gets about twice as far
> > before slowing down. This implies to me that the problem has to do with
> > the available texture memory.
> >
> > I have tried everything that I can think of to free up the texture memory
> > after I am done with each movie. I am idling the textures and I have tried
> > every means I could think of for deleting them. The freeImage pfTexture
> > command only frees the image after it has no references (according to the
> > documentation). I don't see how this command can ever free the image
> > because as long as I can call it from the pfTexture, it is referenced by
> that
> > texture. pfDelete is equally ineffective for the same reason, and both
> pfFree
> > and pfMemory::free cause the system to crash. The program is not getting
> > anywhere near the 512 texture limit that I have heard of, yet. However,
> > that will become an issue that needs to be addressed at some point.
> >
> > Currently, however, it appears that for some reason the texture memory
> > gets filled up, and even though most of the textures in it aren't being
used
> > anymore they are still being paged in and out slowing things down.
> >
> > The system I am using is an iR with 16 MB texture memory, 1 RM6 with 4 R10K
> > CPUs and 512 MB RAM. The software is Performer 2.1 on IRIX 6.2.
> >
> > Has anyone heard or dealt with such a problem? Thanks for any help.
> >
> > Wm. Frank Dea and Mark Lewis
> > wdea++at++swri.edu
> > Southwest Research Institute
> >
> > =======================================================================
> > List Archives, FAQ, FTP: http://www.sgi.com/Technology/Performer/
> > Submissions: info-performer++at++sgi.com
> > Admin. requests: info-performer-request++at++sgi.com
> >-- End of excerpt from WDea++at++swri.edu
>
>
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> Date: Fri, 16 Aug 1996 16:53:20 +0100
> From: Angus Dorbie <dorbie++at++bitch.reading.sgi.com>
> Subject: Re: Texture Memory problems on iR
> In-Reply-To: WDea++at++swri.edu "Texture Memory problems on iR" (Aug 16, 9:46am)
> To: WDea++at++swri.edu, info-performer++at++sgi.com
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>-- End of excerpt from Tinker, Peter
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