Onload Deployment on NUMA Systems

Onload User Guide (UG1586)

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1.2 English

When deployed on NUMA systems, application load throughput and latency performance can be adversely affected unless due consideration is given to the selection of the NUMA node, the allocation of cache memory and the affinitization of drivers, processes and interrupts.

For best performance the accelerated application should always run on the NUMA node nearest to the network adapter. The correct allocation of memory is particularly important to ensure that packet buffers are allocated on the correct NUMA node to avoid unnecessary increases in QPI traffic and to avoid dropped packets.