<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:m="http://schemas.microsoft.com/office/2004/12/omml" xmlns="http://www.w3.org/TR/REC-html40"><head><META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii"><meta name=Generator content="Microsoft Word 15 (filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:"Franklin Gothic Book";
panose-1:2 11 5 3 2 1 2 2 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hello,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I was hoping for some updated insight regarding the comparison between the autofp and workers runmodes. I saw some of discussion on this thread comparing the two from 2-3 years ago, but I think a lot has changed since then. I’ve also noticed posts expressing performance concerns with autofp because of contention due to locking, but I’m not sure how up-to-date those are, either. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The conventional wisdom from users on this thread, as well as from the Suricata training I attended in Virgina this year, seem to suggest that ‘workers’ is the preferred runmode. However, my testing has shown various circumstances where I’m dropping packets in workers mode due to 1 or 2 (out of 16) threads pegged at ~99-100% CPU. Also, any costly Lua add-ons raise the likelihood of holding up the pipeline and dropping packets in workers mode. The load balancing aspects of autofp make it a more appealing and logical option, in my mind.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I’d appreciate any up-to-date insight anyone has. I’ve noticed some of the autofp related optimizations in 2.1beta4, but I’d like to better understand how much autofp has evolved in the past couple years.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal>Zach<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><b><span style='font-size:12.0pt;font-family:"Franklin Gothic Book",sans-serif'>________________________<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Franklin Gothic Book",sans-serif'>Zach Rasmor<o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Franklin Gothic Book",sans-serif'>Senior Software Engineer<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Franklin Gothic Book",sans-serif'>Lockheed Martin CIRT<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Franklin Gothic Book",sans-serif'>700 N Frederick Ave | Gaithersburg, MD 20879<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Franklin Gothic Book",sans-serif'>Email: <a href="mailto:zachary.r.rasmor@lmco.com"><span style='color:blue'>zachary.r.rasmor@lmco.com</span></a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:9.0pt;font-family:"Franklin Gothic Book",sans-serif'>Office: 301.240.6116<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>