[OMPI users] Problem with the receive buffer size?

2010-09-04 Thread dbbmyx-franzxaver
Hi, I have some problems with my mpi-project. I try to send some information from one process to another one. To realize this I use the Issend and the Iprobe and Ireceive Operation. When using the Issend and the Ireceive operation I use the MPI_CHAR datatype because I try to send/receive a seri

Re: [OMPI users] Problem with the receive buffer size?

2010-09-04 Thread David Zhang
when you use Ireceive, did you also use mpi_wait on the status from Ireceive? On Sat, Sep 4, 2010 at 7:46 AM, wrote: > > Hi, > > I have some problems with my mpi-project. > I try to send some information from one process to another one. To realize > this I use the Issend and the Iprobe and Irece

Re: [OMPI users] spin-wait backoff

2010-09-04 Thread Ralph Castain
On Sep 3, 2010, at 5:10 PM, David Singleton wrote: > On 09/03/2010 10:05 PM, Jeff Squyres wrote: >> On Sep 3, 2010, at 12:16 AM, Ralph Castain wrote: >> >>> Backing off the polling rate requires more application-specific logic like >>> that offered below, so it is a little difficult for us to i

Re: [OMPI users] Problem with the receive buffer size?

2010-09-04 Thread dbbmyx-franzxaver
Thanks for your tip. No I did not use mpi_wait. Because when I use it it waits forever. I wrote some example that show this behavior. Sorry for the ugly coding. But it should show my problem. When using countR-variable with 800 it works. But when I use 1000 it waits forever... #incl