Date: Wed, 31 Mar 2004 13:47:16 -0800 (PST) From: Nate Lawson <nate@root.org> To: Ruslan Ermilov <ru@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/pci if_ste.c Message-ID: <20040331134609.N90425@root.org> In-Reply-To: <20040331211028.37B5016A4E2@hub.freebsd.org> References: <20040331211028.37B5016A4E2@hub.freebsd.org>
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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
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