Hi, On Sun, Sep 25, 2011 at 8:03 PM, Ben Hutchings <[email protected]> wrote: > On Sat, 2011-09-24 at 13:56 -0700, Juli Mallett wrote: >> On Sat, Sep 24, 2011 at 13:52, Luigi Rizzo <[email protected]> wrote: >> > apart from the typo ("know know") yes the email contained three >> > serious questions, two of which (third party drivers and shops >> > which carry the card) i cannot answer looking at the tree. >> > >> > On top of this, some in-tree drivers may be stale, broken, redundant >> > (say ixgb vs ixgbe), and so on. And not all hardware can do line >> > rate -- not even at 1G, let alone 10G, so it would be good to know >> > also some first hand information on performance. >> >> ixgb vs. ixgbe is not a stale/redundant issue. ixgb only supports the >> 82597, which you'll find is not supported by ixgbe. >> >> I think you'll have a hard time getting reliable performance >> information. There's a lot of smoke and mirrors about performance, as >> you point out. It has also been my experience that many 10g devices >> cannot reliably do 1g line rate with minimal packet sizes. I don't >> fully understand why this is, but most people who I've seen give >> performance numbers for FreeBSD are looking at bulk transmit, which is >> of course not (necessarily) what you care about for netmap. I've yet >> to hear from anyone who can name a 10G NIC one can buy that can do >> line rate with minimal packet sizes. Solarflare boasts about lower >> latency, so perhaps they'll have a better story in that area. > [...] > > Sorry, our current hardware can't move 64-byte frames at 10G line rate. > I can check what the maximum packet rate is if you're interested. > If you refer to [0] and [1], it would seem that the Solarstorm SFC4000 (B) supports 4e6 pps. That said, that is a number from 2008.
> We will have a FreeBSD driver out real soon now(TM), but most of my work > on performance has gone into improving throughput. (The latency should > be pretty good if you turn off interrupt moderation, though.) And > really I think Onload is more useful than netmap, since it's compatible > with existing source and binaries. > By "FreeBSD driver", do you mean just a driver for the card, or the complete Onload stack ? AFAIS, it is currently Linux only. Thanks, - Arnaud [0]: http://www.youtube.com/watch?v=1Y8hoznuuuM [1]: http://www.openonload.org/openonload-google-talk.pdf > Ben. > > -- > Ben Hutchings, Staff Engineer, Solarflare > Not speaking for my employer; that's the marketing department's job. > They asked us to note that Solarflare product names are trademarked. > > > _______________________________________________ > [email protected] mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-net > To unsubscribe, send any mail to "[email protected]" > _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "[email protected]"
