Troubles with em on FreeBSD 7

[Oleksandr Samoylyk]

mike at 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.

-- 
  Oleksandr Samoylyk
  OVS-RIPE