We have been making a concerted effort to resolve outstanding issues as the 
interest in threaded applications has grown. It should be pretty good now, but 
we do see occasional bug reports, so it isn’t perfect.

> On Feb 18, 2017, at 12:14 AM, Mark Dixon <m.c.di...@leeds.ac.uk> wrote:
> 
> On Fri, 17 Feb 2017, r...@open-mpi.org wrote:
> 
>> Depends on the version, but if you are using something in the v2.x range, 
>> you should be okay with just one installed version
> 
> Thanks Ralph.
> 
> How good is MPI_THREAD_MULTIPLE support these days and how far up the 
> wishlist is it, please?
> 
> We don't get many openmpi-specific queries from users but, other than core 
> binding, it seems to be the thing we get asked about the most (I normally 
> point those people at mvapich2 or intelmpi instead).
> 
> Cheers,
> 
> Mark
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