Slow networkperformance in current?

[Jack Vogel]

On 7/20/07, Ståle Kristoffersen <staale at kristoffersen.ws> wrote:
> On 2007-07-20 at 08:10, Jack Vogel wrote:
> > On 7/20/07, Ståle Kristoffersen <staalebk at ifi.uio.no> wrote:
> > >On 2007-07-20 at 09:08, Vince wrote:
> > >> Silly as it might seem when did you last recompile the iperf port? I was
> > >> about to post a me too post yesterday, until I updated my system to use
> > >> the latest sched_ule at which point iperf froze my system completely,
> > >> recompiling the port fixed the freeze and the <100Mbit/sec on localhost.
> > >> I think it was compiled against the wrong threading library (been a
> > >> while since i last recompiled it.)
> > >
> > >Actually I just spotted this myself, when I recompiled I got in the range
> > >of 600Mbits/sec to localhost. However I do noot see the increase you see
> > >when running it multiple times. I still think 600Mbits/sec is a bit low.
> > >
> > >If I run it to a remote host I see the same numbers (around 600Mbits/sec)
> >
> > I am actually quite impressed with the stack right now, with our new
> > Oplin hardware and the ixgbe driver I have 9.8 Gb/s pumping thru
> > it. Of course its all about adequate hardware, configuration, and
> > tuning.
>
> Then it must be something I'm doing wrong. It's not that I'm running such a
> beast of a machine, but it should manage to fill a gigabitlink (and it did
> a few months ago!).
>
> Can you point out any tuning I might have detuned?

The stack being capable, as I said, of delivering the goods says nothing
of the driver, what NIC is it? Did you ask if anyone else with that
hardware is seeing a problem, I came into this thread somewhat late.

Jack