[gpaw-users] Can anyone get mpi broadcast working?

[Alex Eftimiades]

Yes. I am using openmpi -np 4 gpaw-python test.py

If this is indeed something wrong with my test script, please show me  
one that works!
Alex

On Dec 15, 2011, at 5:40 PM, Ask Hjorth Larsen wrote:

> Hi
>
> On Thu, 15 Dec 2011, Alex Eftimiades wrote:
>
>> I thought it was working about a month ago. Now it does not. I have
>> tried testing it with a simple broadcast, and the processes do not
>> sync. There is no error, they just do not sync. I am beginning to
>> suspect that there is something wrong in the source code since I
>> updated between then and now. If not, please show me a working  
>> example
>> (start to finish) that successfully broadcasts an ndarray with more
>> than one element (it does seem to work for one element.)
>> At the very least, the example provided in the documentation is
>> incomplete. I tried copying and pasting it into a .py file and  
>> testing
>> it. N and mydata need to be initialized with some values. So I
>> initialized them with some values. Then I got the same problem as my
>> tests--no errors, no syncing.
>>
>> For now, I may just have to write stuff to a file with one rank and
>> load it with the others. However if this is a bug in the source code,
>> I would imagine this could cause problems with parallel calculations.
>>
>> Thanks,
>> Alex
>
> How are you running the programme?  Through gpaw-python?  Broadcast  
> is used in all parallel GPAW calculations, so the test suite should  
> make hundreds of complaints if this function is not working.
>
> Regards
> Ask