Date: Thu, 8 Mar 2007 15:50:56 -0800 From: "Jack Vogel" <jfvogel@gmail.com> To: "Sven Petai" <hadara@bsd.ee> Cc: freebsd-net@freebsd.org Subject: Re: em problems on supermicro 5015M-MT+ Message-ID: <2a41acea0703081550s44605ba9o301e04e01e25aef6@mail.gmail.com> In-Reply-To: <200703090111.40417.hadara@bsd.ee> References: <200703090111.40417.hadara@bsd.ee>
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[-- Attachment #1 --] On 3/8/07, Sven Petai <hadara@bsd.ee> wrote: > Hi > > We have 3 supermicro 5015M-MT+ machines that are identical hw > wise and are all running 6.2R. One of them was installed in 32 > bit mode and others are running 64 bit systems. > They are all connected to the same Cisco switch (2960G). > > 32 bit system can communicate with all the other systems besides > the 64 bit boxes just fine. > When we transfer files between the two 64 bit systems everything > seems to be just fine and we get reasonable speeds. > > When one of the 64 bit systems tries to communicate with the 32 bit box or any > other system whatsoever it gets: > * ~40KB/s when interface is in gigabit mode > * 320KB/s when interface is in 100baseTX full-duplex > * 500KB/s when interface is in 100baseTX half-duplex > > Tcpdump is full of lost packets, out of order packets, retransmits, duplicate > acks (probably all caused by fast-retransmit) and all other kinds of > nastiness. > > We also see the infamous "em0 watchdog timeout -- resetting" messages from > time to time, but not always when doing the tests so resets alone can't be > the reason. > > We have tried various network settings from polling to debug.mpsafenet=0 > and nothing seems to help much. To exclude possibilty of broken switch port/ > bad cable we also tried the same thing with em1 interfaces (with other cables > of course) and still got identical symptoms. > > So what can possibly cause the fact that systems can communicate fine with > eachother and fail so miserably when communicating with anything else ? > > If nobody can come up with any good ideas we will probably try installing 32 > bit systems on the problamatic machines since it seems to be the only > relevant difference between the working and non-working ones. > > The 64 bit boxes are currently in preproduction testing and we can provide > access to for developers who wish to debug it. > > Full dmesg & pciinfo is available @ > http://bsd.ee/~hadara/debug/supermicro/ > > The most relevant parts are: > > pciconf: > em0@pci13:0:0: class=0x020000 card=0x108c15d9 chip=0x108c8086 rev=0x03 > hdr=0x00 > vendor = 'Intel Corporation' > device = 'PRO/1000 PM' > class = network > subclass = ethernet > em1@pci14:0:0: class=0x020000 card=0x109a15d9 chip=0x109a8086 rev=0x00 > hdr=0x00 > vendor = 'Intel Corporation' > class = network > subclass = ethernet > > dmesg: > em0: <Intel(R) PRO/1000 Network Connection Version - 6.2.9> port 0x4000-0x401f > mem 0xe0200000-0xe021ffff irq 16 at device 0.0 on pci13 > em0: Ethernet address: 00:30:48:8c:52:78 > pcib5: <ACPI PCI-PCI bridge> irq 16 at device 28.5 on pci0 > pci14: <ACPI PCI bus> on pcib5 > em1: <Intel(R) PRO/1000 Network Connection Version - 6.2.9> port 0x5000-0x501f > mem 0xe0300000-0xe031ffff irq 17 at device 0.0 on pci14 > em1: Ethernet address: 00:30:48:8c:52:79 I am not sure why the 32/64 bit architecture is making a difference, however, you have the 573 NIC, so before doing anything else run this DOS app, it will patch your eeprom if needed, the problem is a misprogramed MANC register that tends to eat packets when it shouldnt. Please let me know if that helps. Oh, you arent using TSO by some chance are you? 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