Re: draw times

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Brian Furtaw (brian++at++sgi.com)
Wed, 29 Jan 1997 10:10:11 -0500

On Jan 29, 7:38am, Bryan Wasileski wrote:
> Subject: draw times
> Performers:
> Does any know how to deterministically calculate, in closed form, the
> draw and cull times per viewport (channel) for a Performer app?
> Some would say that deterministic and SGI don't usually go together
> in the same sentence but I need to at least get close. The application I
> have can have anywhere from 1-28 viewports and I need to know how
> to pre-determine the frame rate as a function of the number of channels.
>
> Any help or direction would be greatly appreciated. Thanks
>
> - bryan wasileski
> McDonnell Douglas Training Systems
> St. Louis, MO
> bwasileski++at++mdc.com
>
>
>
>
>
>
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>-- End of excerpt from Bryan Wasileski

This probably isn't much help and it seems obvious but the example
program multichan.C could be modified to accept the number of channels
desired on the command line then using pfStats you could do some
measurements with a sample database which is relavent to your project.

This is just a suggestion I don't have any SGI benchmark numbers to
give you. I guess the big hangup with drawing multiple channels is
the gfx context switch plus you have to download the textures all
over again.

mulitchan is in /usr/share/Performer/src/pguide/libpf/C|C++

Brian

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Brian Furtaw  (brian++at++sgi.com)	
VisSim  Technical  Consultant
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