>> > Yes, what's happening is this: GHC 6.10.2 contains some slightly bogus >> > heuristics about when to turn on the parallel GC, and it just so >> > happens that 8 processors tips it over the point where the parallel GC >> > is enabled for young-generation collections. In 6.10.2 the parallel >> > GC really didn't help most of the time, but it has undergone a lot of >> > tuning since then, and in the HEAD things are much better (see the >> > results from our ICFP submission). >> >> Fantastic! I'll disable parallel garbage collection (I'm fairly >> certain it won't have any effect for this application). > > How many cores are you planning to use? ...
16 on the best machine we've got. This particular application is a bit weird, I suspect it will be spending very little time actually executing Haskell and most of the time waiting for shell commands. As such, the efficiency of Haskell isn't a problem - parallel garbage collection shouldn't make any difference. Thanks Neil _______________________________________________ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
