Depends on your code...
On Mar 4, 2013 6:10 PM, "Łukasz Dąbek"
Hello Cafe!
I have a problem with following code: http://hpaste.org/83460. It is a simple Monte Carlo integration. The problem is that when I run my program with +RTS -N1 I get: Multi 693204.039020917 8.620632s Single 693204.039020917 8.574839s End
And with +RTS -N4 (I have four CPU cores): Multi 693204.0390209169 11.877143s Single 693204.039020917 11.399888s End
I have two questions: 1) Why performance decreases when I add more cores for my program? 2) Why performance of single threaded integration also changes with number of cores?
Thanks for all answers, Łukasz Dąbek.
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