Multiprocessor IRIS m/cs

[Thant Tessman]

In article <11299 at cs.yale.edu>, kankaria-praveen at CS.Yale.EDU (Praveen
Kankaria) writes:
> 
>   Is it true that one processor is dedicated to graphics on the
multiprocessor
>   IRIS machines ?  The speedups we got for some parallel programs on a
4 processor
>   machine suggest that.
> 

I'm not the person to answer this, but I'll try.

There is no one processor dedicated to graphics.  Any of them can send
graphics down the pipe.  However, only one processor *per process*
can send graphics to the pipe.  Only the original thread owns the 
graphics context.  This is probably the cause of the results you are
getting.

thant