coll/libnbc: Work around for non-uniform data types in ibcast #2330
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* If (legal) non-uniform data type signatures are used in ibcast then the chosen algorithm may fail on the request, and worst case it could produce wrong answers. * Add an MCA parameter that, by default, protects the user from this scenario. If the user really wants to use it then they have to 'opt-in' by setting the following parameter to false: - `-mca coll_libnbc_ibcast_skip_dt_decision f` * Once the following Issues are resolved then this parameter can be removed. - open-mpi#2256 - open-mpi#1763 Signed-off-by: Joshua Hursey <jhursey@us.ibm.com>
bosilca
approved these changes
Nov 1, 2016
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bot:lanl:retest |
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@jsquyres ready to go. |
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then the chosen algorithm may fail on the request, and worst case
it could produce wrong answers.
scenario. If the user really wants to use it then they have to
'opt-in' by setting the following parameter to false:
-mca coll_libnbc_ibcast_skip_dt_decision fbe removed.