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Date: -- (:)
From: Philippe Wang <philippe.wang.lists@g...>
Subject: Re: [Caml-list] OC4MC : OCaml for Multicore architectures
make program.nc uses original ocamlopt

make program.th uses the newly built ocamlopt with the necessary
options (lib links)

then you can compare program.nc and program.th

On Thu, Sep 24, 2009 at 2:21 AM, Jon Harrop <jon@ffconsultancy.com> wrote:
> On Wednesday 23 September 2009 11:53:09 Goswin von Brederlow wrote:
>> Has anyone tested this yet? Any success stories?
>
> Well, I've used the build.sh script to build a patched OCaml 3.10.2 that
> identifies itself as:
>
> $ ocamlopt -v
> The Objective Caml native-code compiler, version
> 3.10.2+patch-ocaml4multicore-20090823
> Standard library
> directory: /home/jdh30/src/ocaml/parallel/oc4mc-20090823/ocaml-3.10.2/../out/lib/ocaml
>
> and I've built their tests:
>
> $ cd tests
> $ make matmul.nc
> ocamlopt -o "matmul.nc" -thread unix.cmxa threads.cmxa
> graphics.cmxa "matmul.ml"
> File "matmul.ml", line 25, characters 8-13:
> Warning Y: unused variable count.
> File "matmul.ml", line 26, characters 8-16:
> Warning Y: unused variable last_col.
>
> and run them:
>
> $ time ./matmul.nc 1000 8
> Temp de calcul: utime 38.930433, stime 0.012000, rtime 38.943138
> Fatal error: exception Invalid_argument("index out of bounds")
>
> real    0m38.974s
> user    0m38.942s
> sys     0m0.028s
>
> Note the exception that (I think) should have been caught and handled
> silently.
>
> But I cannot get anything to run in parallel. None of the tests use more than
> one core and my own busy-wait-loops-on-two-threads test also runs only on one
> core. Any idea what I'm doing wrong? Is there a flag to enable it or
> something?
>
> One possible cause: I'm running in a 64-bit chroot.
>
> --
> Dr Jon Harrop, Flying Frog Consultancy Ltd.
> http://www.ffconsultancy.com/?e
>
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-- 
Philippe Wang
   mail@philippewang.info