Re: [Haskell-cafe] Re: Waiting for thread to finish

Silly or not, if I compile with -threaded, I always link in the one-liner C file: char *ghc_rts_opts = "-N2"; so I don't have to remember at runtime whether it should run with 2 cores or not. This just changes the default to 2 cores, so I am still free to run on only one core with the runtime flags +RTS -N1, though I rarely need to. http://www.haskell.org/ghc/docs/latest/html/users_guide/runtime-control.html... Dan Brad Clow wrote:

Silly mistake. I had compiled with -threaded, but forgot the +RTS -N2.

However, I have a more complex app, where I haven't forgotton to use the right flags :-) and the utilisation of cores is very poor. I am thinking it is due to laziness. I am currently wondering how GHC handles the case where the function that is being forked uses lazy arguments?

On Nov 28, 2007 10:54 AM, Spencer Janssen wrote:

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Did you compile with -threaded, and run with +RTS -N2?

Regards brad