Re: [Haskell-cafe] Compiling ghc for using STM

On Mon, 2006-07-17 at 18:29 +0100, Asfand Yar Qazi wrote:

On 7/17/06, Bulat Ziganshin wrote:

...

if you want to really use 2 processors, you should use ghc 6.5, which is still in beta stage. ghc 6.4 executes all the Haskell code on one processor (to be exact, at each moment there is only one program thread executing Haskell code)

I should have explained: I've already got ghc trunk successfully compiled. I just need to turn on native threading or whatever its called so I can learn STM'ism (and no, I can't make do with in-process threads - I didn't pay 230 GBP for a dual-core processor to have one in the background processing cron jobs :-)

So, as soon as I figure out how to compile ghc 6.5 beta, and how to include parallelisation support, I'm set :-)

I believe that the smp flavour of the RTS is now built by default and so all you need to do is use it when linking a program: ghc-6.5 -smp Foo.hs -o foo Then when running the program you can tell the RTS how many OS threads to use: ./foo +RTS -N2 -RTS Duncan