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--- documentation:technical_docs:performance [2019/11/21 17:22] – [Choosing good Hardware] olivier
+++ documentation:technical_docs:performance [2019/11/21 17:27] – [Disabling Hyper Threading] olivier
@@ Line 104: / Line 104: @@
 ==== Choosing good FreeBSD release ====
-Before tuning, you need to use the good FreeBSD version.
+Before tuning, you need to use the good FreeBSD version... this mean a recent FreeBSD -head.
-This mean a FreeBSD -head version older than r309257 (Andrey V. Elsukov 's improvement: Rework ip_tryforward() to use FIB4 KPI) backported to FreeBSD 11-stable r310771 (MFC to stable).
-BSDRP since version 1.70 is using a FreeBSD 11-stable (r312663) that includes this improvement.
+BSDRP is currently following FreeBSD 12-stable branch, to try to have a mix between recent features and stability.
+==== Disabling Hyper Threading (HT) ====
-{{documentation:technical_docs:2016-performance-evolution.png|2016 Forwarding performance evolution of FreeBSD -head on a 8 core Atom}}
+By default, lot's of multi-queue NIC drivers create one queue per core.
+But "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.
-For better (and linear scale) performance there is the [[https://svnweb.freebsd.org/base/projects/routing/|projects/routing]] too [[http://blog.cochard.me/2015/09/receipt-for-building-10mpps-freebsd.html|that still give better performance]].
-==== Disabling Hyper Threading ====
-Disable Hyper Threading (HT): By default, lot's of multi-queue NIC drivers create one queue per core.
-But "logical" cores didn't help at all for managing interrupts generated by high speed NIC.
 HT can be disabled with this command: