Below is from ompi_info:
$ ompi_info --all | grep btl_openib_receive
MCA btl: parameter "btl_openib_receive_queues" (current value:
<P,128,256,192,128:S,2048,1024,1008,64:S,12288,1024,1008,64:S,65536,1024,1008,64>,
data source: default value)
This tunning does make sense for me.
# receive_queues = P,128,256,192,128:S,65536,256,192,128
Most likely it was not updated for a long time.
I'm pretty sure the ompi_info version is the one that actually used.
So comparing the two above, they don’t coincide, in particular for the SRQ
settings. Thus, I gather the settings reported by ompi_info above are those
that are actually used, and if so, I am wondering where/how they are derived?
The idea behind this parameters is coming from here:
http://www.open-mpi.org/papers/euro-pvmmpi-2007-ib/euro-pvmmpi-2007-ib.pdf
And later on XRC support was introduced:
http://www.open-mpi.org/papers/euro-pvmmpi-2008-xrc/euro-pvmmpi-2008-xrc.pdf
Best,
Pasha
