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Date: Wed, 31 Mar 2004 13:47:16 -0800 (PST)
From: Nate Lawson <nate@root.org>
To: Ruslan Ermilov <ru@FreeBSD.org>
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Subject: Re: cvs commit: src/sys/pci if_ste.c
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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.*.

-Nate