Date: Sat, 12 Oct 2002 00:48:46 -0500 (CDT) From: Hyong-Youb Kim <hykim@cs.rice.edu> To: Andrew Gallatin <gallatin@cs.duke.edu> Cc: <freebsd-net@freebsd.org> Subject: Re: Tigon 3 bad checksums on TCP packets Message-ID: <Pine.GSO.4.33.0210120045320.12482-100000@frosty.cs.rice.edu> In-Reply-To: <Pine.GSO.4.33.0210111723110.9821-100000@frosty.cs.rice.edu>
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BTW, setting BGE_PCI_WRITE_BNDRY_16BYTES limits receive throughput to 540Mb/s. So it is not a solution. I really like to find out what this config does. John On Fri, 11 Oct 2002, Hyong-Youb Kim wrote: > > Thanks. I resolved the issue by forcing BGE_PCI_WRITE_BNDRY_16BYTES > in BGE_PCI_DMA_RW_CTL register. The linux driver apparently has a DMA test > code and sets this value depending on the test results. I have no clue as > to why this configuration messes up TCP receive packets and not UDP > packets. > > > John > > On Fri, 11 Oct 2002, Andrew Gallatin wrote: > > > > > Hyong-Youb Kim writes: > > > > > > I have been recently testing 3C996B-T board in an Athlon system. > > > The system has TigerMP board and a single Athlon 2000+ and runs FreeBSD > > > 4.7-RC. With bge driver, every thing works fine except that the NIC piles > > > up bad checksums on TCP receive packets. For instance, > > > netperf TCP_STREAM from another machine would pile up bad checksums. > > > What is most amazing to me is that NIC works fine with UDP receive > > > packets. As far as I have experienced, TCP/UDP checksumming in NIC should > > > have little or no difference. Too bad that the firmware is under NDA. > > > > > > > Which RC? Try updating to -stable (or 4.7-release) and then > > try applying the patch in rev 1.21 (disable memory write invalidate). > > > > http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/bge/if_bge.c.diff?r1=1.20&r2=1.21 > > > > > > Drew > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-net" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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