Thanks for that. I hadn't realised that most (large) commodity systems these days had a NUMA setup. I thought it was relegated to the more esoteric end of thing

Thanks for that. I hadn't realised that most (large) commodity systems these days had a NUMA setup. I thought it was relegated to the more esoteric end of things (super computer setup, single-system-image clusters). Thanks - I can see that blindly treating NUMA memory as "uniform random access" is going to hurt.