[mpich-discuss] Poor performance of Waitany / Waitsome

[Jeff Hammond]

John's code doesn't server as a fair comparison of Waitsome and
Waitany.  In fact, now that I look at it, it appears that his calls to
Waitany are incorrect and furthermore will not lead to the same effect
of Waitsome or Waitall w.r.t. populating the two output arrays.

Jeff

On Sat, Jan 18, 2014 at 11:48 AM, Jed Brown <jed at jedbrown.org> wrote:
> John Grime <jgrime at uchicago.edu> writes:
>> Waitsome() seems to give consistently the worst performance ( Waitall < Waitany < Waitsome )
>
> This is concerning because the entire point of Waitsome is to be faster
> than repeated calls to Waitany.  In particular, a valid implementation
> just calls Waitany and returns one at a time.
>
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-- 
Jeff Hammond
jeff.science at gmail.com