High Network Perfomance

Slawa Olhovchenkov slw at zxy.spb.ru
Sun Aug 7 13:14:58 UTC 2011

On Thu, Aug 04, 2011 at 08:39:17PM -0300, Victor Detoni wrote:

> Hi Guys,
> I'm trying tunning a FreeBSD 8.2 to high perfomance network with pf. My
> server configuration is:
> Dell 1950
> CPU: Intel(R) Xeon(R) CPU            5130  @ 2.00GHz (1995.03-MHz K8-class
> CPU)
> 4 x CPU
> 2 NIC (<Broadcom NetXtreme II BCM5708 1000Base-T)
> 1 NIC (em0: <Intel(R) PRO/1000 Network Connection 7.1.9>)
> I want to reach the high processing of packets per second and use pf as
> synproxy and we still processor to handle others packets or flows.
> I know that em drivers has MULTI_QUEUE implementation that helps high
> performance for Intel drivers, but I couldn't see more information about. We
> can reached 500k pps, but no more traffic was processed by this interface.
> I've already enabled net.isr.direct but with Intel Drivers does not work and
> the most processors are in System instead of Interrupts, why? When I enable
> net.isr.direct the processing is balanced for on CPU in system and another
> in interrupt and I reached 1M pps, but the total perfomance is down, the
> load grow up too fast.
> I've changed some parameter in sysctl for intel drivers, but it doesn't have
> effect.
> Someone know what I can do to reach more packets performance? I want to use
> this FreeBSD as a router/firewall only.

FreeBSD (and em) need some tuning for high perfomance.

Next links in russian, sorry.


Slawa Olhovchenkov

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