[mpich-discuss] One-sided communication: MPI_Win_lock inside MPI_Win_fence

[Rajeev Thakur]

Can you send the complete program if it is small.

Rajeev

On May 29, 2012, at 2:54 PM, Ziaul Haque Olive wrote:

> for smaller number of processes like 4, i was getting correct result, but for 8, it was providing incorrect result.
> 
> I tried with and without lock/unlock. without lock/unlock provides correct result all the time.
> 
> Hello, 
> 
> I am getting incorrect result while using lock/unlock synchronization inside fence. the pattern is as follows,
> 
>           MPI_Win_fence(win1);
>               ..........
>           MPI_Win_lock(exclusive, win1);
> 
>           MPI_Accumulate(MPI_BOR, win1);
> 
>           MPI_Win_unlock(win1);
> 
>           MPI_Win_fence(win1);
> 
> is it invalid to use lock in this way?
> 
> Thanks,
> Ziaul.
> 
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