hi,
The scheduler or resource managment system informs rank 0 that the application can expand onto N number of nodes. I am able to write this interaction. I am using a listener thread on rank 0 and when the scheduler informs of the expansion, i am raising a SIGUSR1 from the listener thread and the main thread catches and handles the signal. It then needs to inform other ranks about the expansion and send the number of new nodes along with their names to the other ranks.
When the scheduler has no free nodes this interaction is not necessary.
thank you,
Satya.
On Wed, 04 Feb 2004 Prashanth wrote :
>
>Hi,
>
>What is the condition that must be satisfied for Rank 0 to send
>information to other processes?
>
>Thanks.
>
>Prashanth Charapalli,
>LAM/MPI Team.
>
>
>Thus spoke Satya Gosula in the message sent on Tue, 3 Feb 2004
>
>->hi,
> I have the following problem.
> I have a lam application running on N nodes. At some point during the computation, rank 0 has to send some information to other processes. This does not happen at a certain point, but rather happens dynamically at different points. Also, in some cases it might not happen.
> I am unable to come up with a strategy to tackle this problem? How does rank 0 sends this information to other processes. Although this is not a problem with lam, i am using lam mpi, that's why i am posting this question.
>
>thanks in advance,
>Satya.
>
hi,
The scheduler or resource managment system informs rank 0 that the application can expand onto N number of nodes. I am able to write this interaction. I am using a listener thread on rank 0 and when the scheduler informs of the expansion, i am raising a SIGUSR1 from the listener thread and the main thread catches and handles the signal. It then needs to inform other ranks about the expansion and send the number of new nodes along with their names to the other ranks.
When the scheduler has no free nodes this interaction is not necessary.
thank you,
Satya.
On Wed, 04 Feb 2004 Prashanth wrote :
>
>Hi,
>
>What is the condition that must be satisfied for Rank 0 to send
>information to other processes?
>
>Thanks.
>
>Prashanth Charapalli,
>LAM/MPI Team.
>
>
>Thus spoke Satya Gosula in the message sent on Tue, 3 Feb 2004
>
>->hi,
> I have the following problem.
> I have a lam application running on N nodes. At some point during the computation, rank 0 has to send some information to other processes. This does not happen at a certain point, but rather happens dynamically at different points. Also, in some cases it might not happen.
> I am unable to come up with a strategy to tackle this problem? How does rank 0 sends this information to other processes. Although this is not a problem with lam, i am using lam mpi, that's why i am posting this question.
>
>thanks in advance,
>Satya.
>
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