The many-core performance wall

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Ultimately, software will need to change

The problem with parallel computing has always been
contention over shared resources.

For computational problems that can be solved using a
divide-and-conquer strategy, there is a solution: give
each processor core it's own private bank of memory
(whether it is on the chip or off is not essential to
the solution). If you remember the Transputer in the
late 1980's, it used this architecture.

The problem of course is that you have to be able to
divide-and-conquer and not all problems can be solved
this way. Even worse, it requires a different way of
thinking and a different way of writing software.

Long live OCCAM.

Posted by: timboldt   Posted on: 12/11/08 You are currently: a Guest | Members login | Terms of Use

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