ale stats (AR8121)

[Mike Tancsa]

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 ?

# 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