On Fri, 29 Apr 2011 01:18:05 -0400
Ed Ravin <era...@panix.com> wrote:
> I'm comparing the performance of the Vyatta 6.2 distribution
> (Linux 2.6.35-1, 32-bit) on an Intel E31320 box (Supermicro X9SCL)
> and on an older Supermicro motherboard with a X3450 CPU.
>
> Both boxes have a 2-port 82576 card installed ("Intel Corporation 82576
> Gigabit Network Connection (rev 01)" according to lspci -v).
>
> One test I use is to have mz blast short UDP packets with randomized
> source addresses to the box under test, which receives them on
> one 82576 port and then forwards them out the other port.
> There are multiple destination IP addresses (a small subnet)
> and the traffic balances across the multiple queues as expected.
>
> The igb driver is version 2.1.0-k2, which defaults on this platform
> to 8 combined RX/TX queues, and I see all the CPUs getting loaded
> down more or less equivalently during the test. When I run the
> test past the capacity of the computer, all CPUs would show as close
> to 100% in softirq according to mpstat.
Vyatta puts a number of iptables rules in place (for use by firewall
commands). If you don't have any need for them it is possible to remove
all the chains and get a modest performance increase.
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