FreeBSD-6.1/amd64 bge(4) driver performance problems

[MQ]

2006/11/29, Vladimir Terziev <vlady at gbservices.biz>:
>
>
>         The cable and the switch port, both were one and the same in the
> test with Broadcom NIC and in the test with D-Link NIC. So, the reason is
> not in them for sure.
>
>         I didn't mention in my initial e-mail, that since the swtich is
> 100Mbps, the Broadcom NIC was forced to work on 100mbit, full-duplex. For
> some reason, when using autodect, the Broadcom NIC negotiates 100mbit,
> half-duplex.
>
>                 Vladimir
>
> On Wed, 29 Nov 2006 07:09:33 -0600
> Josh Paetzel <josh at tcbug.org> wrote:
>
> > On Tuesday 28 November 2006 12:47, Vladimir Terziev wrote:
> > >     Hi,
> > >
> > >     i have a machine with Pentium 4-D processor utilizing
> > > FreeBSD-6.1-RELEASE-p10/amd64.
> > >
> > >     The machine is running SMP kernel.
> > >
> > >     The machine has 2 on-board Broadcom BCM5721 NICs, which are
> > > handeled by the bge(4) driver and 4 D-Link DL10050 NICs, which are
> > > handeled by the ste(4) driver. Machine is targeted for a
> > > gateway/firewall and will handle a big amount of network traffic.
> > >
> > >     It seems the bge(4) driver has severe performance problems (may be
> > > especially in my configuration). I tried test scp(1) to a remote
> > > machine, using one of the BCM5721 NICs. The average speed which has
> > > been reached was 200kBps.
> > >
> > >     Just for comparison, when i tryed the same test scp(1), to the
> > > same remote machine, but using one of the D-Link DL10050 NICs, the
> > > average speed which has been reached was 10MBps.
> > >
> > >     Could someone point me to a good performance tuning document for
> > > bge(4) handeled NICs, under SMP kernel or at all?
> > >
> > >     Thanks in advance!
> > >
> > >             Vladimir
> >
> > So you have 2 gig-E and 4 100tx interfaces on the same PCI bus?  If so
> > you're going to run into bus saturation long before you're able to
> > max out the throughput on the NICs.
> >
> > Which isn't to say that 200 kBps isn't a problem, but perhaps you are
> > dealing with a bad cable or switchport.
> >
> > --
> > Thanks,
> >
> > Josh Paetzel
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Yes, maybe the current bge(4) has some problems with the media type. When
connecting a 5780 to another 5701, it completely refused to work. But when I
use the 5701 to work with Intel 82547, it works great.