[MPICH] Program crashes when multiple threads make MPI Calls

[Ashok Babu Amara]

I have built MPICH2 1.0.3, but the thread support still seems to be
MPI_THREAD_FUNNELED, even though I request for MPI_THREAD_MULITPLE in
MPI_Init_thread.

Is there any specific parameters that I need to give to ./configure in
order to support MPI_THREAD_MULITPLE ?

Thanks,
- Ashok

On 2/9/06, Rajeev Thakur <thakur at mcs.anl.gov> wrote:
> If MPI_Init_thread returns provided=MPI_THREAD_FUNNELED, you can't make MPI
> calls from multiple threads. MPICH-1 supports only MPI_THREAD_FUNNELED. If
> you need MPI_THREAD_MULITPLE, you need to use MPICH2.
>
> Rajeev
>
>
> > -----Original Message-----
> > From: owner-mpich-discuss at mcs.anl.gov
> > [mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of Ashok Babu Amara
> > Sent: Thursday, February 09, 2006 12:44 PM
> > To: mpich-discuss at mcs.anl.gov
> > Subject: [MPICH] Program crashes when multiple threads make MPI Calls
> >
> > Hi All,
> >
> > I am making MPI calls from two threads and it doesn't seem to be
> > working. I have one thread constantly doing MPI_Send's and MPI_Recv's
> > and another thread which is constantly doing MPI_Allreduce.
> >
> > When I run the program it either hangs or prints this message :
> > [0] Abort: header->id != c->next_packet_expected at line 730 in file
> > mpid/vapi/viacheck.c
> >
> > The version of MPICH being used is 1.2.6 and the thread level support
> > is  MPI_THREAD_FUNNELED.
> >
> > Can someone advise what is possibly wrong ?
> >
> > I have attached the code that is being tested.
> >
> > Thanks,
> > - Ashok
> >
>
>