Hi, I am building ompi v1.6 with knem support and I see that when knem is enabed from the command line it is used for all message sizes in SM btl. There is no threshold for when to start using knem - starting which message size. This makes the performance of small messages worse since it also uses knem. Maybe a certain "knem threshold" should be added to specify when to use SM btl's send and when to start using knem.
What do you think? Alina.
