ELXSI System 6400 .... Information needed
Chris Thomson
cmt at myrias.UUCP
Sun Jun 22 09:21:12 AEST 1986
> > a 10 processor test at Sandia Labs they got 10.1X the power of a single
> > processor.
>
> This is an interesting trick. Does anyone have a clue about how they
> got a greater than linear speedup?
This was a cache effect. The program being run was almost perfectly
parallelizable (how's that for a word?), with almost no synchronization
overhead (a linear algebra problem, I think). Thus its total data motion
on 10 processors was very nearly the same as on 1 processor, but there was
10 times as much cache available, hence the 10.1 times speedup. The result
is hardly a general one, but does speak well of the machine's overall
ability to multiprocess.
--
Chris Thomson, Myrias Research Corporation ihnp4!alberta!myrias!cmt
200 10328 81 Ave, Edmonton Alberta, Canada 403 432 1616
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