The “topology-manager-policy=single-numa-node” is a configuration option for the Kubernetes Topology Manager. This policy ensures that each pod is scheduled on a single NUMA node, which helps to optimize performance by reducing latency and improving memory access.
NUMA (Non-Uniform Memory Access) is a computer architecture design that allows different processors or cores to have their own dedicated memory. In a multi-socket system, each socket has its own set of processors and local memory. If a process running on one processor needs to access memory from another processor’s socket, it has to go through an interconnect bus, which can introduce latency.
By using the “single-numa-node” policy, the Kubernetes scheduler ensures that each pod runs on a single NUMA node, so there is no need for interconnect bus communication between different sockets. This results in faster and more efficient processing.
Overall, this configuration option is useful for high-performance computing workloads that require low-latency and high-bandwidth communication between CPU cores and memory.
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