cvs commit: src/sys/pci if_ste.c

Ruslan Ermilov ru at
Wed Mar 31 22:42:48 PST 2004

On Wed, Mar 31, 2004 at 01:47:16PM -0800, Nate Lawson wrote:
> On Wed, 31 Mar 2004, Ruslan Ermilov wrote:
> >   Modified files:
> >     sys/pci              if_ste.c
> >   Log:
> >   Under a heavy RX load, at least with D-Link DFE-550TX adapters,
> >   the driver's RX ring head may fall behind the chip, causing the
> >   stuck traffic, disordered packets, etc.  Work around this by
> >   adopting the technique of resyncing RX head used in dc(4) and
> >   xl(4) drivers, but do it in a slightly different place to reduce
> >   the number of resyncs needed.
> >
> >   Also, set the NIC's RX polling period to a more meaningful value,
> >   to stop overloading the PCI bus (this also reduces the number of
> >   resyncs by a factor of 3 or more in a long run; the actual number
> >   is very dependent on a nature of the traffic).
> >
> >   Maintain the statistics counter as the hw.ste_rxsyncs sysctl.
> This pollutes the toplevel hw sysctl space.  Please move it to
> hw.ste.rxsyncs or better, debug.*.
Seems I followed the bad practice from dc(4) and fxp(4).  I will
move it to hw.ste, thanks.

Ruslan Ermilov
ru at
FreeBSD committer
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