bge dropping packets issue

[Jung-uk Kim]

On Wednesday 16 April 2008 04:28 pm, Alexander Sack wrote:
> On Wed, Apr 16, 2008 at 2:56 PM, Jung-uk Kim <jkim at freebsd.org> 
wrote:
> > [CC trimmed]
> >
> >  On Wednesday 16 April 2008 02:20 pm, Alexander Sack wrote:
> >  > Dieter: Thanks, at 20Mbps!  That's pretty aweful.
> >  >
> >  > JK:  Thanks again.  Wow, I searched the list and didn't see
> >  > much discussion with respect to bge and packet loss!  I will
> >  > try the rest of that patch including pushing the TCP receive
> >  > buffer up (though I don't think that's going to help in this
> >  > case).  The above is based on just looking at code....
> >  >
> >  > I guess some follow-up questions would be:
> >  >
> >  > 1)  Why isn't BGE_SSLOTS tunable (to a point)?  Why can't that
> >  > be added the driver?  I noticed that CURRENT has added a lot
> >  > more SYSCTL information.  Moreover it seems the Linux driver
> >  > can set it up to 1024.
> >
> >  IIRC, Linux tg3 uses one ring for both standard and jumbo.
>
> I'm talking about the number of slots within the ring not the
> number of RX queues.
>
> I believe the bnx4 driver (thought the tg stuff was deprecated??)
> uses 4 rings (one for each port perhaps) and reads hardware
> register at ISR time to flip between them.

I guess you are reading wrong source, i.e., bnx4(?) is NetXtreme II 
driver, which totally different family.  We support them with bce(4).  
tg3 is still official Linux driver.

Jung-uk Kim