cvs commit: src/sys/pci if_ste.c
nate at root.org
Wed Mar 31 13:47:15 PST 2004
On Wed, 31 Mar 2004, Ruslan Ermilov wrote:
> Modified files:
> sys/pci if_ste.c
> 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.*.
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