[MPICH] Ordering process

[Trach-Minh Tran]

On 02/28/2007 02:18 PM, Ludovic HABLOT wrote:
> Hello,
> 
> I'm using mpich2-1.0.5p2 on a computing grid. I'm executing the NPB, and
> so I have to control where each process is launched.
> 
> But when I use mpich2 with mpd, the process are never launch in the same
> order.-Minh.
> 
> Is there a way to order my process ? Is there a rule to know the order
> in advance ?
> 
> Any idea is welcome,
> 
> Thanks in advance,
> 
> Ludovic
> 
> Example : the execution of mpdtrace never give the same result on 4 nodes :
> 
> ~/mpich2-install/bin/mpiexec -machinefile node_file_2 -n 4 hostname
> parasol36.irisa.fr
> parasol51.irisa.fr
> parasol40.irisa.fr
> parasol45.irisa.fr
> 
> ~/mpich2-install/bin/mpiexec -machinefile node_file_2 -n 4 hostname
> parasol36.irisa.fr
> parasol45.irisa.fr
> parasol40.irisa.fr
> parasol51.irisa.fr
> 
> 
Hi,
By using the "-l" flag to display the MPI rank, you can see that a node
is always assigned the same MPI rank, although the output is not
ordered.
-Minh.