[Gems-users] Running Multiprogram workloads

[niranjan soundararajan <niranjan83@xxxxxxxxx>]

Hello,

Is is possible to run multiprogram workloads (say 2 apps) with 1 app pinned to 4 cores and another app pinned to 4 other cores
on pseudo-8 cores (since all cores cannot be bound, I use a 9 core machine)? 

I am trying to use psrset and creating 2 process groups, one for each app but the simulation crashes when opal is reached. It runs fine when the 2 apps are allowed to use all cores. 

Another question is related to ruby. Since its actually a 9-core machine, ruby requires a multiple of 8 and is it ok to pass 8 to g_NUM_PROCESSORS and g_PROCS_PER_CHIP. Does anyone know how to address this issue as well?

Thank you,
Niranjan