Freebsd IP Forwarding performance (question,
and some info) [7-stable, current, em, smp]
sepherosa at gmail.com
Tue Jul 1 05:05:38 UTC 2008
On 7/1/08, Adrian Chadd <adrian at freebsd.org> wrote:
> 2008/7/1 Sepherosa Ziehau <sepherosa at gmail.com>:
> > Properly configured #RX desc and timer intr interval will be required
> > to make sure that the RX desc collection could keep up with the
> > hardware speed. I used pure timer intr (8000Hz) on nfe(4) in dfly w/
> > good result, i.e. TX/RX @linespeed without livelocking the system.
> > The drawback of pure timer intr is that you waste extra cpu power,
> > when there is nothing to process.
> What packet rate is "linespeed" ? With what size packets?
I did not mean pps w/ 64bytes packet. Didn't have time to measure it
yet. I only saw that msk(4) and em(4) could accept 64bytes packets
@1.4Mpps. I meant netperf -t TCP_STREAM with -s/-S/-m 65536 on an
AMDX2 3600+ with 1GBytes ram in i386 mode.
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