Re: MPI status?

Rahul Bhargava wrote,

...

So my question is, what is the state of the art? What is the state of the MPI port? Does the alpha port work sufficiently well. One potential problem I can see is that I'm not sure gcc is avaliable on the T3E and I'm not sure how dependant ghc is upon the various GNU C extensions.

Roman Lechtchinsky was working towards the same end, GHC on the T3E (after porting gcc).

Yes, Roman has ported gcc to the T3E (you absolutely need gcc for GHC). Last I heard, he was about to submit the relavant patches to the FSF. AFAIK, nothing has been done about the actual port of GHC to the T3E yet. I think, the next logical step would be to try the recent alpha port on the T3E. I guess, this will require to modify the mangler, because AFAIK the assembler on the Cray is a little different to standard alpha assembler (at least gcc's code generation will be different, which might already break the mangler). I am in principle prepared to look into all this, but haven't got much time at the moment...maybe we can get this done in a combined effort. Manuel PS: If you are wondering what the mangler is, look at http://www.cse.unsw.edu.au/~chak/haskell/ghc/comm/the-beast/mangler.html