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

Michael Lesniak wrote:

Hello,

I've written a smaller example which reproduces the unusual behaviour. Should I open a GHC-Ticket, too?

Hi, I get these results: $ time ./Temp +RTS -N1 -RTS 16 real 0m16.010s user 0m10.869s sys 0m5.144s $ time ./Temp +RTS -N2 -RTS 16 real 0m12.794s user 0m13.341s sys 0m7.136s Looking at top, the second version used ~160% CPU time (i.e. it was using both cores fairly well). So I don't think I get the same bad behaviour as you. Those sys times look high by the way -- I guess it's all the calls to getTime? I wonder if that number might be causing the problem; can you replicate it with lower sys times? Thanks, Neil.