Using openmpi 1.6.2 with intel 13.0 though the problem not specific to the compiler.
Using two 12 core 2 socket nodes, mpirun -np 4 -npersocket 2 uptime -------------------------------------------------------------------------- Your job has requested a conflicting number of processes for the application: App: uptime number of procs: 4 This is more processes than we can launch under the following additional directives and conditions: number of sockets: 0 npersocket: 2 Any idea why this wouldn't work? Another problem the following does what I expect, two 2 socket 8 core sockets. 16 total cores/node. mpirun -np 8 -npernode 4 -bind-to-core -cpus-per-rank 4 hwloc-bind --get 0x0000000f 0x0000000f 0x000000f0 0x000000f0 0x00000f00 0x00000f00 0x0000f000 0x0000f000 But fails at large scale: mpirun -np 276 -npernode 4 -bind-to-core -cpus-per-rank 4 hwloc-bind --get -------------------------------------------------------------------------- An invalid physical processor ID was returned when attempting to bind an MPI process to a unique processor. This usually means that you requested binding to more processors than exist (e.g., trying to bind N MPI processes to M processors, where N > M). Double check that you have enough unique processors for all the MPI processes that you are launching on this host. You job will now abort. -------------------------------------------------------------------------- Brock Palen www.umich.edu/~brockp CAEN Advanced Computing bro...@umich.edu (734)936-1985
