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--- documentation:technical_docs:performance [2019/12/27 00:18] – [Disabling Hyper Threading (HT)] olivier
+++ documentation:technical_docs:performance [2020/01/18 01:02] – [Polling mode] olivier
@@ Line 108: / Line 108: @@
 BSDRP is currently following FreeBSD 12-stable branch, to try to have a mix between recent features and stability.
-==== Disabling Hyper Threading (HT) ====
+==== Disabling Hyper Threading (on specific CPU only) ====
 By default a multi-queue NIC drivers create one queue per core.
-But on older CPU (like Xeon E5-2650 V1) those logical cores didn't help at all for managing interrupts generated by high speed NIC (this is not true on 13-head since [[https://svnweb.freebsd.org/base?view=revision&revision=354338|r354338]] and the new machdep.hyperthreading_intr_allowed that allow interrupts on HTT logical CPUs.
+But on some older CPU (like Xeon E5-2650 V1) those logical cores didn't help at all for managing interrupts generated by high speed NIC.
 HT can be disabled with this command:
@@ Line 255: / Line 255: @@
 {{documentation:technical_docs:entropy_source_impact.png|Impact of disabling some entropy source on FreeBSD forwarding performance}}
-==== Polling mode ====
+==== Polling mode (very old hardware) ====
 Polling can be used in 2 cases: