No it is not too low. Dual socket (2 NUMA) Intel Xeon E5-4660 v3 (56 threads total) still scales much better than single socket (4 NUMA) 2990WX.
It would probably scale even better if I set numa pools manually.
According to x265 documentation (
https://x265.readthedocs.io/en/default/threading.html )
Quote:
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If you are running multiple encoders on a system with multiple NUMA nodes, it is recommended to isolate each of them to a single node in order to avoid the NUMA overhead of remote memory access.
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Can somebody verify than I'm setting numa pools correctly in my previous post?