From baaa0eb1a0dfe71646367f58c0148ed4a84d14b6 Mon Sep 17 00:00:00 2001
From: Balint Reczey <balint@balintreczey.hu>
Date: Fri, 23 Aug 2013 18:11:47 +0000
Subject: Mention BPF JIT in User Guide

svn path=/trunk/; revision=51492
---
 docbook/wsug_src/WSUG_chapter_capture.xml | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'docbook/wsug_src')

diff --git a/docbook/wsug_src/WSUG_chapter_capture.xml b/docbook/wsug_src/WSUG_chapter_capture.xml
index c031da3db7..7823c823e0 100644
--- a/docbook/wsug_src/WSUG_chapter_capture.xml
+++ b/docbook/wsug_src/WSUG_chapter_capture.xml
@@ -384,6 +384,14 @@ wireshark -i eth0 -k
         The "Compile selected BPFs" button leads you to 
         <xref linkend="ChCapCompileSelectedBpfsDialog"/>.
           </para>
+	  <tip><title>Tip!</title>
+	  <para>
+	    The execution of BPFs can be sped up on Linux by turning on BPF JIT by
+	    executing <programlisting>echo 1 >/proc/sys/net/core/bpf_jit_enable</programlisting>
+	    if it is not enabled already. To make the change persistent you can use sysfsutils
+	    <ulink url="&SysFsUtils;">sysfsutils</ulink>.
+	  </para>
+	  </tip>
         </listitem>
       </varlistentry>
       <varlistentry>
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