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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