Re: [OMPI users] How to map to sockets with 1 per core, but bind to a single hwthread

2016-02-12 Thread Ralph Castain
Sadly, lama has fallen into a stale, unsupported condition. I’ve been thinking about your mapping request, and I don’t currently see a way to do it with the existing options. I understand the request, however, and will see if I can come up with something over the weekend. > On Feb 12, 2016, at

Re: [OMPI users] How to map to sockets with 1 per core, but bind to a single hwthread

2016-02-12 Thread Stephen Guzik
We've also tested lama with -np 10 --mca rmaps_base_verbose 10 --mca rmaps_lama_priority 91 --mca rmaps_lama_map sNbnch --mca rmaps_lama_bind 1h --mca rmaps_lama_mppr 1:c,5:s It seems like this would do the right thing except a priority < 10 does nothing and greater than 10 segfaults. Is lama st

[OMPI users] How to map to sockets with 1 per core, but bind to a single hwthread

2016-02-11 Thread Stephen Guzik
Hi, I would like to divide n processes between the sockets on a node, with one process per core, and bind them to a hwthread. Consider a system with 2 sockets, 10 cores per socket, and 2 hwthreads per core. If I enter -np 20 --map-by ppr:1:core --bind-to hwthread then this works as I intend.