ale stats (AR8121)

Wed May 26 16:43:02 UTC 2010

On Wed, May 26, 2010 at 12:30:20PM -0400, Mike Tancsa wrote:

Hi,

> Just trying out a MB that has an integrated ale nic and was looking 
> at some of the many stats available. The last one,
> dev.ale.0.stats.tx.trunc_errs: Truncated frames due to MTU size
> 
> doesnt seem to make sense.  The nic's MTU is set to 1500. What would 
> be generating traffic locally that would have an MTU size that is too 
> big ? or is the counter perhaps recording something else ?
> 

There is a comment on this in driver.

2243         /*
2244          * XXX
2245          * tx_pkts_truncated counter looks suspicious. It constantly
2246          * increments with no sign of Tx errors. This may indicate
2247          * the counter name is not correct one so I've removed the
2248          * counter in output errors.
2249          */
2250         ifp->if_oerrors += smb->tx_abort + smb->tx_late_colls +
2251             smb->tx_underrun;

Anyway I have to ask Atheros what the counter really means.
Thanks for reminding it. If I get some feedback I'll let you know.

> # ifconfig ale0
> ale0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
>         options=c319a<TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,WOL_MCAST,WOL_MAGIC,VLAN_HWTSO,LINKSTATE>
>         ether e0:cb:4e:42:4b:37
>         inet 172.16.13.254 netmask 0xffffff00 broadcast 172.16.13.255
>         inet 10.230.33.1 netmask 0xffffff00 broadcast 10.230.33.255
>         media: Ethernet autoselect (1000baseT <full-duplex>)
>         status: active
> 
> dev.ale.0.%desc: Atheros AR8121/AR8113/AR8114 PCIe Ethernet
> dev.ale.0.%driver: ale
> dev.ale.0.%location: slot=0 function=0
> dev.ale.0.%pnpinfo: vendor=0x1969 device=0x1026 subvendor=0x1043 
> subdevice=0x8226 class=0x020000
> dev.ale.0.%parent: pci4
> dev.ale.0.int_rx_mod: 30
> dev.ale.0.int_tx_mod: 1000
> dev.ale.0.process_limit: 64
> dev.ale.0.reset_brk_seq: 0
> dev.ale.0.stats.rx.good_frames: 970368
> dev.ale.0.stats.rx.good_bcast_frames: 2338
> dev.ale.0.stats.rx.good_mcast_frames: 0
> dev.ale.0.stats.rx.pause_frames: 0
> dev.ale.0.stats.rx.control_frames: 0
> dev.ale.0.stats.rx.crc_errs: 0
> dev.ale.0.stats.rx.len_errs: 0
> dev.ale.0.stats.rx.good_octets: 1432442744
> dev.ale.0.stats.rx.good_bcast_octets: 171236
> dev.ale.0.stats.rx.good_mcast_octets: 0
> dev.ale.0.stats.rx.runts: 0
> dev.ale.0.stats.rx.fragments: 0
> dev.ale.0.stats.rx.frames_64: 3685
> dev.ale.0.stats.rx.frames_65_127: 10729
> dev.ale.0.stats.rx.frames_128_255: 684
> dev.ale.0.stats.rx.frames_256_511: 179
> dev.ale.0.stats.rx.frames_512_1023: 1
> dev.ale.0.stats.rx.frames_1024_1518: 956795
> dev.ale.0.stats.rx.frames_1519_max: 0
> dev.ale.0.stats.rx.trunc_errs: 0
> dev.ale.0.stats.rx.fifo_oflows: 0
> dev.ale.0.stats.rx.rrs_errs: 0
> dev.ale.0.stats.rx.align_errs: 0
> dev.ale.0.stats.rx.filtered: 1705
> dev.ale.0.stats.tx.good_frames: 646015
> dev.ale.0.stats.tx.good_bcast_frames: 57
> dev.ale.0.stats.tx.good_mcast_frames: 0
> dev.ale.0.stats.tx.pause_frames: 0
> dev.ale.0.stats.tx.control_frames: 0
> dev.ale.0.stats.tx.excess_defers: 0
> dev.ale.0.stats.tx.defers: 0
> dev.ale.0.stats.tx.good_octets: 49564618
> dev.ale.0.stats.tx.good_bcast_octets: 0
> dev.ale.0.stats.tx.good_mcast_octets: 0
> dev.ale.0.stats.tx.frames_64: 3
> dev.ale.0.stats.tx.frames_65_127: 603750
> dev.ale.0.stats.tx.frames_128_255: 42249
> dev.ale.0.stats.tx.frames_256_511: 13
> dev.ale.0.stats.tx.frames_512_1023: 0
> dev.ale.0.stats.tx.frames_1024_1518: 0
> dev.ale.0.stats.tx.frames_1519_max: 0
> dev.ale.0.stats.tx.single_colls: 0
> dev.ale.0.stats.tx.multi_colls: 0
> dev.ale.0.stats.tx.late_colls: 0
> dev.ale.0.stats.tx.excess_colls: 0
> dev.ale.0.stats.tx.abort: 0
> dev.ale.0.stats.tx.underruns: 0
> dev.ale.0.stats.tx.desc_underruns: 0
> dev.ale.0.stats.tx.len_errs: 0
> dev.ale.0.stats.tx.trunc_errs: 9248
> 
> 
> ale0 at pci0:4:0:0:        class=0x020000 card=0x82261043 
> chip=0x10261969 rev=0xb0 hdr=0x00
>     vendor     = 'Attansic (Now owned by Atheros)'
>     device     = 'PCI-E ETHERNET CONTROLLER  (AR8121/AR8113 )'
>     class      = network
>     subclass   = ethernet
>     cap 01[40] = powerspec 2  supports D0 D3  current D0
>     cap 05[48] = MSI supports 1 message, 64 bit enabled with 1 message
>     cap 10[58] = PCI-Express 1 endpoint max data 128(4096) link x1(x1)
> 
> 
> 
> --------------------------------------------------------------------
> Mike Tancsa,                                      tel +1 519 651 3400
> Sentex Communications,                            mike at sentex.net
> Providing Internet since 1994                    www.sentex.net
> Cambridge, Ontario Canada                         www.sentex.net/mike
> 
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