Mark - this is now available in master. Will look at what might be required to 
bring it to 2.0

> On Feb 15, 2017, at 5:49 AM, r...@open-mpi.org wrote:
> 
> 
>> On Feb 15, 2017, at 5:45 AM, Mark Dixon <m.c.di...@leeds.ac.uk> wrote:
>> 
>> On Wed, 15 Feb 2017, r...@open-mpi.org wrote:
>> 
>>> Ah, yes - I know what the problem is. We weren’t expecting a PE value of 1 
>>> - the logic is looking expressly for values > 1 as we hadn’t anticipated 
>>> this use-case.
>> 
>> Is it a sensible use-case, or am I crazy?
> 
> Not crazy, I’d say. The expected way of doing it would be “--map-by socket 
> --bind-to core”. However, I can see why someone might expect pe=1 to work.
> 
>> 
>>> I can make that change. I’m off to a workshop for the next day or so, but 
>>> can probably do this on the plane.
>> 
>> You're a star - thanks :)
>> 
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