[Haskell-cafe] Strange parallel behaviour with Ubuntu Karmic / GHC 6.10.4

Michael Lesniak mlesniak at uni-kassel.de
Mon Nov 16 04:59:45 EST 2009


> getTime?  I wonder if that number might be causing the problem; can you
> replicate it with lower sys times?
That was it! Thanks Neil!

When I'm using some number crunching without getTime it works (with
more or less the expected speedup and usage of two cores) on my Ubuntu
9.10, too.

Out of curiosity, the question is still open: Why does the old example
(using getTime) work so much better on an older version of
Ubuntu/RedHat and not on the new ones?

Kind regards,

Dipl.-Inf. Michael C. Lesniak
University of Kassel
Programming Languages / Methodologies Research Group
Department of Computer Science and Electrical Engineering

Wilhelmshöher Allee 73
34121 Kassel

Phone: +49-(0)561-804-6269

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