[MPICH] a question about MPI - Pblm in Publish/Lookup with SMPD

[Jayesh Krishna]

Hi,
 We are looking into the problem (The problem is not in your code. It is a
bug in the SMPD process manager.). Meanwhile, as a workaround, try putting a
barrier after publish and before lookup and run the programs as below,
 
      mpiexec -n 1 LookupClient.exe : -n 1 PublishServer.exe
 
 The excerpt from the modified files are given below for your reference,
 
############# LookupClient.c #######################
 
int main(..){
...
MPI_Get_processor_name(processor_name,&namelen); 

MPI_Barrier(MPI_COMM_WORLD);

MPI_Lookup_name(serv_name, MPI_INFO_NULL, port_name_out );

...
}
 
############# PublishServer.c #######################
 
int main(...){
...
MPI_Open_port(MPI_INFO_NULL, port); 

printf("opened port...<%s>\n", port);

fflush(stdout);

merr = MPI_Publish_name( serv_name, MPI_INFO_NULL, port );

MPI_Barrier(MPI_COMM_WORLD);

...
}
 
###############################################
 
 Let us know if it works for you.
 
Regards,
Jayesh

  _____  

From: owner-mpich-discuss at mcs.anl.gov
[mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of menglige
Sent: Tuesday, November 06, 2007 7:12 PM
To: mpich-discuss
Subject: [MPICH] a question about MPI


HELLO!
    i hava two '.exe' ,and i want to send message from one to the other.  
i use 'mpiexec' to run send.exe 
and then use 'mpiexec' to run receive.exe,
but there is an erro ,receive.exe can find the published port .what 's wrong
with me ??? (i hava attached my code).
THANK YOU VERY MUCH 
 
  _____  

menglige
2007-11-06
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