[Snort-users] How to enable multi-thread processing with Snort3?

Russ rucombs at ...589...
Tue Apr 21 11:39:04 EDT 2015



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 at ...17144... ~]# 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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