Kaspars Zibarts

Hyper-threading and Multi-queue on VSX R80.10

Discussion created by Kaspars Zibarts on Aug 24, 2018
Latest reply on Aug 30, 2018 by Kaspars Zibarts

Planning our VSX appliance upgrade from 13800 to 23800 and having dilemma if I should enable SMT (aka Hyper-Threading) on the new appliances. We disabled it on the old ones originally as we were not running any advanced blades on any of VSes except IA. Plus one of the VSes does quite a bit of NAT - both go "against" SMT.

We also run Multi-queue on some interfaces, which would mean that I would have to increase number of cores for multi-queue as it would run across hyper-thread cores.

Which kind of pushed me back to re-think and most likely to disable SMT and stick with real cores instead. We still gain 8 cores and that's a lot.

This would be typical Timothy Hall question

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