Date: Sun, 04 May 2008 17:51:22 -0400 From: mike@sentex.net To: Oleksandr Samoylyk <oleksandr@samoylyk.sumy.ua> Cc: freebsd-net@freebsd.org Subject: Re: Troubles with em on FreeBSD 7 Message-ID: <bibs14perk47snkpg8fu691kjkc42gh6m2@4ax.com> In-Reply-To: <481C84B7.6020205@samoylyk.sumy.ua> References: <481C84B7.6020205@samoylyk.sumy.ua>
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On Sat, 03 May 2008 18:28:55 +0300, in sentex.lists.freebsd.net you wrote: >Hi! > >I'm running a SMP FreeBSD box with mpd5 on it. > ># uname -a >FreeBSD xxx.xxxxxxxxx.xxx 7.0-STABLE FreeBSD 7.0-STABLE #0: Sat May 3 >12:40:02 EEST 2008 xxxxx@xxx.xxxxxxxxx.xxx:/usr/obj/usr/src/sys/XXXX > amd64 > ># mpd5 -v >Version 5.1 (root@xxx.xxxxxxxxx.xxx 09:53 1-May-2008) > >Somehow em0 begins to eat all CPU time of one core. > 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 Also, post some of the stats. Do a sysctl -w dev.em.1.stats=1 to all of your em nics 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: RX MSIX IRQ = 0 TX MSIX IRQ = 0 LINK MSIX IRQ = 0 em1: XON Rcvd = 0 em1: XON Xmtd = 0 em1: XOFF Rcvd = 0 em1: XOFF Xmtd = 0 em1: Good Packets Rcvd = 71949 em1: Good Packets Xmtd = 2507 em1: TSO Contexts Xmtd = 369 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. ---Mike
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