Linux on NUMA Systems

NUMA is becoming more widespread in the marketplace, used on many systems, small or large, particularly with the advent of AMD Opteron systems. This paper will cover a summary of the current state of NUMA, and future developments, encompassing the VM subsystem, scheduler, topology (CPU, memory, I/O layouts including complex non-uniform layouts), userspace interface APIs, and network and disk I/O locality. It will take a broad-based approach, focusing on the challenges of creating subsystems that work for all machines (including AMD64, PPC64, IA-32, IA-64, etc.), rather than just one architecture.


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