Date: Sun, 4 May 2008 15:29:42 -0700 From: "Jack Vogel" <jfvogel@gmail.com> To: "Oleksandr Samoylyk" <oleksandr@samoylyk.sumy.ua> Cc: freebsd-net@freebsd.org, mike@sentex.net Subject: Re: Troubles with em on FreeBSD 7 Message-ID: <2a41acea0805041529j5d4dd2f7x5e07a8d6d2eb89b6@mail.gmail.com> In-Reply-To: <481E338D.6040706@samoylyk.sumy.ua> References: <481C84B7.6020205@samoylyk.sumy.ua> <bibs14perk47snkpg8fu691kjkc42gh6m2@4ax.com> <481E338D.6040706@samoylyk.sumy.ua>
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On Sun, May 4, 2008 at 3:07 PM, Oleksandr Samoylyk <oleksandr@samoylyk.sumy.ua> wrote: > mike@sentex.net wrote: > > > > > A new version of the em drivers went into the tree Friday. > > > > > > > dev.em.0.%desc: Intel(R) PRO/1000 Network Connection Version - 6.7.3 > > > > > > > dev.em.0.%desc: Intel(R) PRO/1000 Network Connection 6.9.0 > > dev.em.0.%driver: em > > dev.em.0.%location: slot=0 function=0 > > dev.em.0.%pnpinfo: vendor=0x8086 device=0x108c subvendor=0x15d9 > > subdevice=0x108c class=0x020000 > > dev.em.0.%parent: pci13 > > dev.em.0.debug: -1 > > dev.em.0.stats: -1 > > dev.em.0.rx_int_delay: 0 > > dev.em.0.tx_int_delay: 66 > > dev.em.0.rx_abs_int_delay: 66 > > dev.em.0.tx_abs_int_delay: 66 > > dev.em.0.rx_processing_limit: 100 > > > > I tried both: > > - new drivers: 6.9.0 > - rx_processing_limit: 100 > > Result the same :( > > > > > Also, post some of the stats. Do a sysctl -w dev.em.1.stats=1 > > to all of your em nics > > > > em0: Excessive collisions = 0 > em0: Sequence errors = 0 > em0: Defer count = 0 > em0: Missed Packets = 434970 > em0: Receive No Buffers = 290593 > em0: Receive Length Errors = 0 > em0: Receive errors = 0 > em0: Crc errors = 0 > em0: Alignment errors = 0 > em0: Collision/Carrier extension errors = 0 > em0: RX overruns = 2929 > em0: watchdog timeouts = 0 > em0: XON Rcvd = 0 > em0: XON Xmtd = 0 > em0: XOFF Rcvd = 0 > em0: XOFF Xmtd = 0 > em0: Good Packets Rcvd = 64182304 > em0: Good Packets Xmtd = 84277659 > em0: TSO Contexts Xmtd = 832 > em0: TSO Contexts Failed = 0 > > > em1: Excessive collisions = 0 > em1: Sequence errors = 0 > em1: Defer count = 0 > em1: Missed Packets = 0 > em1: Receive No Buffers = 0 > em1: Receive Length Errors = 0 > em1: Receive errors = 0 > em1: Crc errors = 0 > em1: Alignment errors = 0 > em1: Collision/Carrier extension errors = 0 > em1: RX overruns = 0 > em1: watchdog timeouts = 0 > em1: XON Rcvd = 0 > em1: XON Xmtd = 0 > em1: XOFF Rcvd = 0 > em1: XOFF Xmtd = 0 > em1: Good Packets Rcvd = 62431510 > m1: Good Packets Xmtd = 55466567 > em1: TSO Contexts Xmtd = 0 > > em1: TSO Contexts Failed = 0 > > > > And are you using gigabit or fastE. If fastE, try disabling TSO as > > some people have said they have problems with it at 100Mb. > > > > I'm on GgE. Disabling TSO doesn't help as well. You are running out of RX side resources, did you say this was UDP? I'm guessing upping your mbuf pool at least, I can't think of something in driver-wise that would help. If you have this same load going into a different nic, or different os (like say Linux) can it manage? This will take some thought, I'm not sure off the top of my head here. Jack
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