[mpich-discuss] Fwd: Can't receive messages

[Rajeev Thakur]

Try adding an fflush(stdout) after the printf after the recv.

On Dec 29, 2013, at 12:50 PM, Matthias Neuer <mneuer at web.de> wrote:

> 
> 
> 
> -------- Original Message --------
> Subject: Can't receive messages
> Date: Sun, 29 Dec 2013 19:00:05 +0100
> From: Matthias Neuer <mneuer at web.de>
> To: discuss at mpich.org
> 
> Hi.
> 
> I installed MPICH on 2 machines (called notebook and matze-debian) using
> the same sourcecode. The output of mpichversion is both times:
> 
> MPICH Version:          3.0.4
> MPICH Release date:     Wed Apr 24 10:08:10 CDT 2013
> MPICH Device:           ch3:nemesis
> MPICH configure:        --disable-f77 --disable-fc
> --prefix=/home/matze/mpich-install
> MPICH CC:       cc    -O2
> MPICH CXX:      c++   -O2
> MPICH F77:      no
> MPICH FC:       no
> 
> I wrote a small test program which I send as an attachment.
> On execution on the machine matze-debian I get the following:
> 
> Process 0 is on matze-debian
> Process 2 is on matze-debian
> Process 1 is on notebook
> received: Hello, from number 2 on matze-debian
> Process 2 has sent the message
> Process 1 has sent the message
> 
> I don't receive the message from process number 1, but the output
> suggests that the message was succesfully sent. Actually I checked the
> network traffic using wireshark and matze-debian received a package in
> which I found the sent message. So somehow the program does not
> recognize the arrival of the message.
> 
> When I run the program on a single machine it works.
> 
> I don't know if this is a programming error or a configuration error.
> 
> Thanks for your help
> 
> 
> 
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