Re: high packet loss - low throughput

[Doug Burks <doug.burks () gmail com>]

Hi Michal,

I recently saw the following on the pfring dev list. You might want to take
a look and see if it might be related.

Author: cardigliano
Date: 2013-07-20 11:58:32 +0200 (Sat, 20 Jul 2013)
New Revision: 6616

Modified:
   trunk/PF_RING/userland/snort/pfring-daq-module/daq_pfring.c
Log:
stats fix



On Sunday, July 21, 2013, Michal Purzynski wrote:

>  On 7/21/13 2:22 AM, Joel Esler wrote:
>
> On Jul 20, 2013, at 6:46 PM, Michal Purzynski <michal () rsbac org<javascript:_e({}, 'cvml', 'michal () rsbac org');>>
> wrote:
>
> The sourcefire company claims to achieve 1Gbit/sec per CPU core. I find
> it actualy hard to believe as the "empty" snort used to do around
> 250-300Mbit/sec per core here. Empty as in no rules at all.
>
>
> Even more.  But we have a dedicated appliance specifically tuned with
> special drivers to run Snort very fast.  You are doing this, I assume on
> commodity hardware, on a stock OS, running many things (Security Onion)
>
>
>  Not really, SO is so wonderful you can enable and disable functionality
> on demand, and so I've done. The box is running snort and netsniff-ng only,
> has around 20 processes of snort (24 execution threads with HT enabled).
>
> Still - 45Mbit/sec per instance with packet loss is disappointing. And 100
> would be too.
>
> Also, I'm running Intel and pf_ring, can try a Myricom (and not pf_ring).
> I won't try anything more expensive like FPGA accelerated cards, since I
> find them too limited and having no real advantage over Myricom and a lot
> of downsides.


-- 
Doug Burks
http://securityonion.blogspot.com

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