em0 with latest driver hangs again and again (without "Watchdogtimeout" message!)

[Özkan KIRIK]

Hello,

I've been testing the em.7.2.2 driver as kld. The system is up about 2
days 6 hours.
System has 4 em interfaces, Throughput is about 200Mbit/s. System
didn't hang, but em2 has Input Errors.

I saw that, dev.em.2.mac_stats.missed_packets is not zero? What could
be the problem?

# uname -r
8.2-RELEASE

# sysctl dev.em.| grep miss
dev.em.0.mac_stats.missed_packets: 0
dev.em.1.mac_stats.missed_packets: 0
dev.em.2.mac_stats.missed_packets: 5886
dev.em.3.mac_stats.missed_packets: 0

# netstat -nWI em2 | grep Link
Name      Mtu Network       Address              Ipkts Ierrs Idrop
Opkts Oerrs  Coll
em2      1500 <Link#4>      00:23:8b:89:e4:9e 267256324  5886     0
273081628     0     0

# sysctl dev.em.2.
dev.em.2.%desc: Intel(R) PRO/1000 Network Connection 7.2.2
dev.em.2.%driver: em
dev.em.2.%location: slot=0 function=0 handle=\_SB_.PCI0.P0P4.BR1E
dev.em.2.%pnpinfo: vendor=0x8086 device=0x105e subvendor=0x108e
subdevice=0x125e class=0x020000
dev.em.2.%parent: pci12
dev.em.2.nvm: -1
dev.em.2.debug: -1
dev.em.2.rx_int_delay: 0
dev.em.2.tx_int_delay: 66
dev.em.2.rx_abs_int_delay: 66
dev.em.2.tx_abs_int_delay: 66
dev.em.2.rx_processing_limit: 100
dev.em.2.flow_control: 3
dev.em.2.eee_control: 0
dev.em.2.link_irq: 0
dev.em.2.mbuf_alloc_fail: 0
dev.em.2.cluster_alloc_fail: 0
dev.em.2.dropped: 0
dev.em.2.tx_dma_fail: 0
dev.em.2.rx_overruns: 7
dev.em.2.watchdog_timeouts: 0
dev.em.2.device_control: 1075577409
dev.em.2.rx_control: 67141634
dev.em.2.fc_high_water: 30720
dev.em.2.fc_low_water: 29220
dev.em.2.queue0.txd_head: 3025
dev.em.2.queue0.txd_tail: 3025
dev.em.2.queue0.tx_irq: 0
dev.em.2.queue0.no_desc_avail: 0
dev.em.2.queue0.rxd_head: 1826
dev.em.2.queue0.rxd_tail: 1825
dev.em.2.queue0.rx_irq: 0
dev.em.2.mac_stats.excess_coll: 0
dev.em.2.mac_stats.single_coll: 0
dev.em.2.mac_stats.multiple_coll: 0
dev.em.2.mac_stats.late_coll: 0
dev.em.2.mac_stats.collision_count: 0
dev.em.2.mac_stats.symbol_errors: 0
dev.em.2.mac_stats.sequence_errors: 0
dev.em.2.mac_stats.defer_count: 0
dev.em.2.mac_stats.missed_packets: 5886
dev.em.2.mac_stats.recv_no_buff: 3407
dev.em.2.mac_stats.recv_undersize: 0
dev.em.2.mac_stats.recv_fragmented: 0
dev.em.2.mac_stats.recv_oversize: 0
dev.em.2.mac_stats.recv_jabber: 0
dev.em.2.mac_stats.recv_errs: 0
dev.em.2.mac_stats.crc_errs: 0
dev.em.2.mac_stats.alignment_errs: 0
dev.em.2.mac_stats.coll_ext_errs: 0
dev.em.2.mac_stats.xon_recvd: 0
dev.em.2.mac_stats.xon_txd: 0
dev.em.2.mac_stats.xoff_recvd: 0
dev.em.2.mac_stats.xoff_txd: 0
dev.em.2.mac_stats.total_pkts_recvd: 265358324
dev.em.2.mac_stats.good_pkts_recvd: 265352438
dev.em.2.mac_stats.bcast_pkts_recvd: 701728
dev.em.2.mac_stats.mcast_pkts_recvd: 4076
dev.em.2.mac_stats.rx_frames_64: 0
dev.em.2.mac_stats.rx_frames_65_127: 140801982
dev.em.2.mac_stats.rx_frames_128_255: 3553397
dev.em.2.mac_stats.rx_frames_256_511: 3418754
dev.em.2.mac_stats.rx_frames_512_1023: 8096866
dev.em.2.mac_stats.rx_frames_1024_1522: 109481439
dev.em.2.mac_stats.good_octets_recvd: 177455051448
dev.em.2.mac_stats.good_octets_txd: 274861571704
dev.em.2.mac_stats.total_pkts_txd: 270439410
dev.em.2.mac_stats.good_pkts_txd: 270439410
dev.em.2.mac_stats.bcast_pkts_txd: 194927
dev.em.2.mac_stats.mcast_pkts_txd: 48
dev.em.2.mac_stats.tx_frames_64: 23050855
dev.em.2.mac_stats.tx_frames_65_127: 54156414
dev.em.2.mac_stats.tx_frames_128_255: 4299280
dev.em.2.mac_stats.tx_frames_256_511: 7837146
dev.em.2.mac_stats.tx_frames_512_1023: 8272014
dev.em.2.mac_stats.tx_frames_1024_1522: 172823701
dev.em.2.mac_stats.tso_txd: 0
dev.em.2.mac_stats.tso_ctx_fail: 0
dev.em.2.interrupts.asserts: 283674059
dev.em.2.interrupts.rx_pkt_timer: 33585
dev.em.2.interrupts.rx_abs_timer: 0
dev.em.2.interrupts.tx_pkt_timer: 11022
dev.em.2.interrupts.tx_abs_timer: 22449
dev.em.2.interrupts.tx_queue_empty: 0
dev.em.2.interrupts.tx_queue_min_thresh: 0
dev.em.2.interrupts.rx_desc_min_thresh: 0
dev.em.2.interrupts.rx_overrun: 0

Regards,
Ozkan KIRIK