Phil Keslin (philk++at++cthulhu.engr.sgi.com)
Wed, 09 Jun 1999 10:43:18 -0700
- Phil
Isabelle Lafon wrote:
>
> Hi,
>
> Did anybody already have this problem ?
>
> Using the accumulation buffer on Octane ( 2 300 MHZ IP30 Processors,
> Graphics board: EMXI, IRIX 6.5, and Frame Buffer configuration with
> 16bits r,g,b,a accumulation buffer) drops drastically the performances.
>
> pfDraw();
> => 60.0/60.0Hz Lock Draw =1.5ms
>
> pfDraw();
> glAccum( GL_LOAD, fadeValue );
> glAccum( GL_RETURN, 1.0f );
> => 4.3/60.0Hz Lock Draw =230.9ms
>
> Using accumulation buffer has no impact on Onyx 2 - Draw times
> (60.0/60.0Hz
> Lock Draw =0.7ms) are the same for both case on an Onyx 2.
>
> I was expecting a little drop of performance on the Octane but not a so
> huge one.
>
> Thanks in advance for any informations about this behavior.
> Any suggestions to eliminate or dicrease this performance drop will
> be very appreciate.
>
> Isabelle.
>
> --
> Isabelle Lafon Discreet Logic
> Tel: (514) 954-7157 10 Duke
> Fax: (514) 393-0110 Montreal (Quebec)
> isabelle++at++discreet.com Canada, H3C 2L7
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-- Phil Keslin <philk++at++engr.sgi.com>
This archive was generated by hypermail 2.0b2 on Wed Jun 09 1999 - 10:43:24 PDT