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--- documentation:technical_docs:performance [2019/11/21 17:24] – [Choosing good FreeBSD release] olivier
+++ documentation:technical_docs:performance [2019/11/25 21:21] – [Cisco or Linux] olivier
@@ Line 27: / Line 27: @@
   * [[http://www.telematica.polito.it/oldsite/courmayeur06/papers/06-A.2.1.pdf|RFC2544 Performance Evaluation for a Linux Based Open Router]] (2006, June)
   * [[http://data.guug.de/slides/lk2008/10G_preso_lk2008.pdf|Towards 10Gb/s open-source routing]] (2008): Include an hardware comparison between a "real" router and a PC.
+  * [[https://wiki.fd.io/images/7/7b/Performance_Consideration_for_packet_processing_on_Intel_Architecture.pptx|Performance consideration for packet processing on Intel Architecture (ppt)]]
 ==== FreeBSD ====
@@ Line 107: / Line 108: @@
 BSDRP is currently following FreeBSD 12-stable branch, to try to have a mix between recent features and stability.
-==== Disabling Hyper Threading ====
+==== Disabling Hyper Threading (HT) ====
-Disable Hyper Threading (HT): By default, lot's of multi-queue NIC drivers create one queue per core.
+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.
+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.
 HT can be disabled with this command: