[mpich-discuss] Any application using mpi_barrier a lot?

[Robert Latham]

I don't have any answers for Shanyan Gao, but others on this list
might find interesting the vigorous discussion this question prompted
over on the openmpi list: 

http://www.open-mpi.org/community/lists/users/2009/03/8313.php

==rob

On Tue, Mar 10, 2009 at 04:00:46PM -0400, Shanyuan Gao wrote:
> My current research is trying to rewrite some collective MPI operations 
> to work with our system.  Barrier is my first step, maybe I will have 
> bcast and reduce in the future.  I have done some synthetic tests.  Now I 
> want a real application to measure the performance improvement versus 
> normal MPI_Barrier.  And the improvement can only be measured if the 
> barriers are executed many times.  If you know any, please let me know.  
> Any comment are welcomed, thanks!
>
>
> Shan

-- 
Rob Latham
Mathematics and Computer Science Division    A215 0178 EA2D B059 8CDF
Argonne National Lab, IL USA                 B29D F333 664A 4280 315B