Re: How to enable multi-thread processing with Snort3?

["Li, Ricky" <ricky.li () intel com>]

Got it, thank you very much!

Regards,
Ricky

From: Russ [mailto:rucombs () cisco com]
Sent: Tuesday, April 21, 2015 11:46 PM
To: Li, Ricky; Snort-users () lists sourceforge net
Subject: Re: [Snort-users] How to enable multi-thread processing with Snort3?


On 4/21/15 11:42 AM, Li, Ricky wrote:
Hi,

Thanks for your response!

And I want to check do you mean if I specify "-i eth0 eth1", then packets from eth0 will be processed by thread #1, 
packets from eth1 will be processed by thread #2... like this mode?
Yes, as long as you use -z 2 or --max-packet-threads 2 or greater.  Note that you can also pin threads to cores with 
process.threads.  Check snort --help-config process for details on that.


Regards,
Ricky

From: Russ [mailto:rucombs () cisco com]
Sent: Tuesday, April 21, 2015 11:39 PM
To: Li, Ricky; Snort-users () lists sourceforge net<mailto:Snort-users () lists sourceforge net>
Subject: Re: [Snort-users] How to enable multi-thread processing with Snort3?


On 4/21/15 11:22 AM, Li, Ricky wrote:
Hi,

I'm trying to run snort3 with multi-thread processing feature, I tried with this command:

$my_path/bin/snort -i eth0 -c $SNORT_LUA_PATH/snort.lua -R $SNORT_LUA_PATH/sample.rules -A alert_fast 
--max-packet-threads 3

My expectation is that there could be 3 threads processing the packets simultaneously, but the Top monitoring output is 
like:

[root@localdomain ~]# top -Hp 746
top - 15:12:43 up 51 min,  3 users,  load average: 0.44, 0.16, 0.23
Threads:   2 total,   1 running,   1 sleeping,   0 stopped,   0 zombie
%Cpu(s): 24.7 us,  0.3 sy,  0.0 ni, 50.7 id,  0.0 wa,  1.4 hi, 23.0 si,  0.0 st
KiB Mem:   4049676 total,   410984 used,  3638692 free,    11520 buffers
KiB Swap:        0 total,        0 used,        0 free,    85064 cached

  PID USER      PR  NI    VIRT    RES    SHR S %CPU %MEM     TIME+ COMMAND
  755 root      20   0  302260 236636   5808 R 97.5  5.8   0:21.69 snort
  746 root      20   0  302260 236636   5808 S  0.7  5.8   0:02.93 snort

Still only one thread busy running for processing the input packets, similar to what the Snort 2.X will do.
Is there any other options I need to specify to enable the multi-thread processing for Snort3? How can I enable it?
Snort++ currently requires external load balancing if you want to use multiple packet threads with live traffic.  In 
that case you can specify -i "eth0 eth1 eth2" or whatever.  Likewise with pcaps.  We are planning to add support for 
internal load balancing in a future version.



Regards,
Ricky







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Develop your own process in accordance with the BPMN 2 standard
Learn Process modeling best practices with Bonita BPM through live exercises
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source=Sourceforge_BPM_Camp_5_6_15&utm_medium=email&utm_campaign=VA_SF

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