Re: CPU Affinity

[Livio Ricciulli <livio () metaflows com>]

I am not sure; I would think so... We have always used the pf_ring DAQ 
because we want to support inline also..
Livio.

On 1/26/2013 11:36 AM, Craig Merchant wrote:
> 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 visithttp://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!


--
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!