incusd/device/gpu_sriov: Implement NUMA fallback (NPS) #641
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For systems with multiple NUMA nodes per socket (NPS), it's always better to select a GPU on the same socket, even if on a different node than going across socket. This adds a bit of logic to map the current NUMA nodes to the matching set of CPU sockets and then extract all NUMA nodes from those sockets to build a list of fallback NUMA nodes. Those are less optimal than a direct match but still better than potentially going across socket. Signed-off-by: Stéphane Graber <[email protected]> Sponsored-by: ActivePort (https://www.activeport.com.au)
hallyn
approved these changes
Mar 22, 2024
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For systems with multiple NUMA nodes per socket (NPS), it's always better to select a GPU on the same socket, even if on a different node than going across socket.
This adds a bit of logic to map the current NUMA nodes to the matching set of CPU sockets and then extract all NUMA nodes from those sockets to build a list of fallback NUMA nodes. Those are less optimal than a direct match but still better than potentially going across socket.
Sponsored-by: ActivePort (https://www.activeport.com.au)