Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |   all Open MPI User's mailing list

Subject: Re: [OMPI users] Problem with the receive buffer size?
From: David Zhang (solarbikedz_at_[hidden])
Date: 2010-09-04 10:52:54


when you use Ireceive, did you also use mpi_wait on the status from
Ireceive?

On Sat, Sep 4, 2010 at 7:46 AM, <dbbmyx-franzxaver_at_[hidden]> 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 Ireceive Operation.
> When using the Issend and the Ireceive operation I use the MPI_CHAR
> datatype because I try to send/receive a serialized object as a std::string.
> This works for most operations. But when I send a larger string it seems to
> be that only a part of it is received at the other process. The Iprobe
> operation set the size of the message correctly. But the receiving string
> ist not as large as the sending one.
> Is there any size-limits at the buffers? Is it possible to change the
> buffer-size?
>
> I am thankful for all your informations
> Greetings Franz Xaver
>
>
> _______________________________________________
> users mailing list
> users_at_[hidden]
> http://www.open-mpi.org/mailman/listinfo.cgi/users
>

-- 
David Zhang
University of California, San Diego