Re: Performance degrade if geometry is drawn by multiple pipes

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William Sherman -Visualization (wsherman++at++ncsa.uiuc.edu)
Wed, 5 Aug 1998 17:41:33 -0500 (CDT)

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Dave Pape wrote:
> Daniela-
>
> It appears that Performer is serializing its draw processes based solely
> on the screen number - that is, if you have pfPipes on :0.0, :1.0, and
> :2.0, it sees that they all have a screen number of 0, assumes that
> they're using the same graphics pipe (which they're not), and causes the
> processes to run in sequence rather than in parallel.
>
> -Dave

Dave,

Have you experimented to see if Performer does a numeric or string comparison
to make it's determination? I know of at least one other library that does
a string comparison on DISPLAY, and it can be fooled into not combining
renders into a single screen by using ":0.0", ":0.00", etc. So that's
another possible solution -- probably also requires either editing Xservers
to add some zeros, or perhaps the performer app when setting the display
strings.

Bill

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