Hi Open MPI developers,
Though Sylvain's original mail (*1) was sent 4 months ago and nobody
replied to it, I'm interested in this issue and strongly agree with
Sylvain.
*1 http://www.open-mpi.org/community/lists/devel/2010/01/7275.php
As explained by Sylvain, current Open MPI implementation al
On May 10 2010, Kawashima wrote:
Though Sylvain's original mail (*1) was sent 4 months ago and nobody
replied to it, I'm interested in this issue and strongly agree with
Sylvain.
*1 http://www.open-mpi.org/community/lists/devel/2010/01/7275.php
As explained by Sylvain, current Open MPI implemen
On Mon, 10 May 2010, N.M. Maclaren wrote:
As explained by Sylvain, current Open MPI implementation always returns
MPI_THREAD_SINGLE as provided thread level if neither --enable-mpi-threads
nor --enable-progress-threads was specified at configure (v1.4).
That is definitely the correct action.
Thanks Nick,
> >Though Sylvain's original mail (*1) was sent 4 months ago and nobody
> >replied to it, I'm interested in this issue and strongly agree with
> >Sylvain.
> >
> > *1 http://www.open-mpi.org/community/lists/devel/2010/01/7275.php
> >
> >As explained by Sylvain, current Open MPI impleme
On May 10 2010, Sylvain Jeaugey wrote:
That is definitely the correct action. Unless an application or library
has been built with thread support, or can guaranteed to be called only
from a single thread, using threads is catastrophic.
I personnaly see that as a bug, but I certainly lack so
On May 10 2010, Kawashima wrote:
Because MPI_THREAD_FUNNELED/SERIALIZED doesn't restrict other threads to
call functions other than those of MPI library, code bellow are not
thread safe if malloc is not thread safe and MPI_Allreduce calls malloc.
#pragma omp parallel for private(is_master)
Hi Nick and all,
> >> On others, they use a completely different (and seriously incompatible,
> >> at both the syntactic and semantic levels) set of libraries. E.g. AIX.
> >
> >Sorry, I don't know these issue well.
> >Do you mean the case I wrote above about malloc?
>
> No. You have to compile
N.M. Maclaren wrote:
On May 10 2010, Kawashima wrote:
If we use OpenMP with MPI, we need at least MPI_THREAD_FUNNELED even
if MPI functions are called only outside of omp parallel region,
like below.
#pragma omp parallel for
for (...) {
/* computation */
}
MPI_Allreduce(..
Hi all,
A new run-time test for System V shared memory support has been added
- hopefully addressing all of the concerns voiced earlier in this
thread. If not, please let me know. I've tested the changes on
various Linux systems, OS X, and Solaris 10.
Testing is always appreciated!
htt
