or
> must be in the same group. Is my understanding incorrect?
>
>
>
> Thanks
>
> Rick
>
>
>
> From: users [mailto:users-boun...@lists.open-mpi.org] On Behalf Of Gilles
> Gouaillardet
> Sent: Monday, October 17, 2016 10:38 AM
>
>
> To: Open MPI Users
[mailto:users-boun...@lists.open-mpi.org] On Behalf Of Gilles
Gouaillardet
Sent: Monday, October 17, 2016 10:38 AM
To: Open MPI Users
Subject: Re: [OMPI users] communications groups
Rick,
So you have three types of tasks
- 1 dispatcher
- several sensors
- several proxies
If proxies do not communicate
Of *Gilles Gouaillardet
> *Sent:* Monday, October 17, 2016 9:30 AM
> *To:* Open MPI Users
> *Subject:* Re: [OMPI users] communications groups
>
>
>
> Rick,
>
>
>
> I re-read the MPI standard and was unable to figure out if sensorgroup is
> MPI_GROUP_EMPTY or a gro
ot;.
Rick
From: users [mailto:users-boun...@lists.open-mpi.org] On Behalf Of Gilles
Gouaillardet
Sent: Monday, October 17, 2016 9:30 AM
To: Open MPI Users
Subject: Re: [OMPI users] communications groups
Rick,
I re-read the MPI standard and was unable to figure out if sensorgroup is
MPI_GROUP_
nt:* Friday, October 14, 2016 5:44 PM
> *To:* Open MPI Users
> *Subject:* Re: [OMPI users] communications groups
>
>
>
> Rick,
>
>
>
> Let's assume that you have started 2 processes, and that your sensorList
> is {1}. The worldgroup will then be {P0,
Rick,
In my understanding, sensorgroup is a group with only task 1
Consequently, sensorComm is
- similar to MPI_COMM_SELF on task 1
- MPI_COMM_NULL on other tasks, and hence the barrier fails
I suggest you double check sensorgroup is never MPI_GROUP_EMPTY
and add a test not to call MPI_Barrier on
-boun...@lists.open-mpi.org] On Behalf Of George
Bosilca
Sent: Friday, October 14, 2016 5:44 PM
To: Open MPI Users
Subject: Re: [OMPI users] communications groups
Rick,
Let's assume that you have started 2 processes, and that your sensorList is
{1}. The worldgroup will then be {P0, P1}, which trimm
Rick,
Let's assume that you have started 2 processes, and that your sensorList is
{1}. The worldgroup will then be {P0, P1}, which trimmed via the sensorList
will give the sensorgroup {MPI_GROUP_EMPTY} on P0 and the sensorgroup {P1}
on P1. As a result on P0 you will create a MPI_COMM_NULL communic
