Re: [OMPI users] MPI_Isend delay

2011-07-14 Thread dave fournier
On 11-07-14 06:37 PM, Jeff Squyres wrote: OK, Thanks, that is exactly what I needed to know. Dave On Jul 14, 2011, at 8:33 PM, dave fournier wrote: Sorry I should have said it doesn't get sent until the *master* encounters an MPI_recv. Then suddenly the slave finally gets the message a

Re: [OMPI users] MPI_Isend delay

2011-07-14 Thread Jeff Squyres
On Jul 14, 2011, at 8:33 PM, dave fournier wrote: > Sorry I should have said it doesn't get sent until the *master* encounters an > MPI_recv. > Then suddenly the slave finally gets the message and carries on its task. > > I know that the slave is waiting because: > 1.) it doesn't print anything

Re: [OMPI users] MPI_Isend delay

2011-07-14 Thread dave fournier
On 11-07-14 04:48 PM, Jeff Squyres wrote: Sorry I should have said it doesn't get sent until the *master* encounters an MPI_recv. Then suddenly the slave finally gets the message and carries on its task. I know that the slave is waiting because: 1.) it doesn't print anything 2.) I have attache

Re: [OMPI users] MPI_Isend delay

2011-07-14 Thread Jeff Squyres
On Jul 14, 2011, at 5:50 PM, dave fournier wrote: > I have a master-slave setup. I have noticed that when I send a message from > the master to the slave > processes using MPI_Isend it never gets sent until I encounter an MPI_recv > in the master process. How are you testing that? > As a resu