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Subject: Re: [OMPI users] MPI_THREAD_INIT
From: Gabriele Fatigati (g.fatigati_at_[hidden])
Date: 2008-09-29 09:58:16


Another question about MPI_INIT_THREAD.

At the moment, as said, my OpenMPi version supports only level 0:
MPI_THREAD_SINGLE. Suppose that i have this code:

#pragma omp barrier
#pragma omp master
       MPI_Send(buf,...);
#pragma omp barrier

Due my OpenMPI configuration, is it dangerous use this type of code? What
does it means that OpenMPI doesn't support all thread levels of
MPI_INIT_THREAD?

2008/9/29 Gabriele Fatigati <g.fatigati_at_[hidden]>

> Dear OpenMPi developers,
> i've noted that OpenMPI 1.25 and 1.2.6 version doesn't supports thread
> initialization function shows below:
>
> int MPI_Init_thread(int *argc, char *((*argv)[]), int required, int
> *provided)
>
> used in hybrid programming MPI+OpenMP. Returned vales provided is 0, so
> the unique thread level supported is MPI_THREAD_SINGLE.
>
> Whitch is the newest OpenMPI version that has full support for MPI_THREAD_SINGLE,
> MPI_THREAD_FUNNELED, MPI_THREAD_SERIALIZED and MPI_THREAD_MULTIPLE?
>
> Thanks in advance.
>
> --
> Ing. Gabriele Fatigati
>
> CINECA Systems & Tecnologies Department
>
> Supercomputing Group
>
> Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy
>
> www.cineca.it Tel: +39 051 6171722
>
> g.fatigati_at_[hidden]
>

-- 
Ing. Gabriele Fatigati
CINECA Systems & Tecnologies Department
Supercomputing  Group
Via Magnanelli 6/3, Casalecchio di Reno (BO) Italy
www.cineca.it                    Tel:   +39 051 6171722
g.fatigati_at_[hidden]