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

[Matthias Neuer]

Hi.

Unfortunately, this does not solve the problem.

Maybe I should have written that the program hangs after the output in 
my last post. It waits until MPI_Recv returns which does not happen.

By the way I can login from one machine to the other using ssh, no problem.

Thanks

On 12/30/2013 06:39 AM, Rajeev Thakur wrote:
> 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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