yrn001:
> Hi,
>
> Since I upgraded from ghc 6.8.3 to 6.10.1, I noticed that my programs
> do not run multi-threaded anymore. I tried simplifying my code, till I just
> took one of the par/pseq demo's to verify if it wasn't my fault.
This sounds like the change to the scheduler where only 1 spark
won't trigger the other core to wake up.
See this mail from Simon Marlow,
http://www.haskell.org/pipermail/haskell-cafe/2008-November/050974.html
"I'll make sure it gets fixed for 6.10.2. If you have more sparks then
you shouldn't see this problem. Also, GHC HEAD is quite a lot better
with parallel programs than 6.10.1, I'll try to get around to posting
some figures sometime."
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