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Old 2019-11-04, 13:48   #5
EdH's Avatar
"Ed Hall"
Dec 2009
Adirondack Mtns

3,617 Posts

Originally Posted by VBCurtis View Post
I believe I am running 18.04 on the Z620; though for my use case localhost-only does help, as others have found that using MPI for each socket is much faster than using a single pool of threads. I'm running -t 20 right now on the dual-10-core, where I'd like to be running MPI 2x10-threads.

Good to know it's likely openMPI that I should try to address, rather than my build of msieve.
I will have to do more checking, but I believe if you make sure you have,

openmpi-bin, openmpi-common and libopenmpi-dev

installed, and then compile msieve, with MPI=1, it should work as long as you don't include a hostfile.
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