Re: CPU Affinity

[Craig Merchant <cmerchant () responsys com>]

Thanks, Livio...  So, we use PF-RING with the DNA/Libzero drivers.  But Snort uses the pcap DAQ to access the Libzero 
interfaces, not the pf_ring DAQ.

Does that make any difference?

Thanks.

C

From: Livio Ricciulli [mailto:livio () metaflows com]
Sent: Friday, January 25, 2013 10:05 PM
To: snort-users () lists sourceforge net
Subject: Re: [Snort-users] CPU Affinity

According to our empirical measurements using PF-RING (if that's what you are using), DON'T use CPU affinity; DON'T 
bind CPUs. Let the Linux scheduler do what it wishes..
The definite proof is to compare identical runs using different setups on your hardware, with your rules, with your 
traffic..
However, i would bet that what I recommended above will win..

Livio.
On 1/25/2013 1:59 PM, Craig Merchant wrote:
We have a Snort sensor that runs 28 instances.  Their CPU utilization tends average between 25% and 95%+.  I've read 
opinions both ways for setting CPU affinity.  What are the benefits/drawbacks of setting CPU affinity?

Thx.

Craig




------------------------------------------------------------------------------

Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS,

MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current

with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft

MVPs and experts. ON SALE this month only -- learn more at:

http://p.sf.net/sfu/learnnow-d2d




_______________________________________________

Snort-users mailing list

Snort-users () lists sourceforge net<mailto:Snort-users () lists sourceforge net>

Go to this URL to change user options or unsubscribe:

https://lists.sourceforge.net/lists/listinfo/snort-users

Snort-users list archive:

http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users



Please visit http://blog.snort.org to stay current on all the latest Snort news!




--

Livio Ricciulli

MetaFlows Inc.

(408) 835-5005

------------------------------------------------------------------------------
Master Visual Studio, SharePoint, SQL, ASP.NET, C# 2012, HTML5, CSS,
MVC, Windows 8 Apps, JavaScript and much more. Keep your skills current
with LearnDevNow - 3,200 step-by-step video tutorials by Microsoft
MVPs and experts. ON SALE this month only -- learn more at:
http://p.sf.net/sfu/learnnow-d2d

_______________________________________________
Snort-users mailing list
Snort-users () lists sourceforge net
Go to this URL to change user options or unsubscribe:
https://lists.sourceforge.net/lists/listinfo/snort-users
Snort-users list archive:
http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users

Please visit http://blog.snort.org to stay current on all the latest Snort news!