RELENG_7 em problems (and RELENG_8)

Sun Sep 26 23:43:53 UTC 2010

At 06:19 PM 9/26/2010, Jack Vogel wrote:
>Your em1 is using MSI not MSIX and thus can't have multiple queues. I'm
>not sure whats broken from what you show here. I will try to get the new
>driver out shortly for you to try.

With this particular NIC, it will wedge under high load.  I tried 2 
different motherboards and chipsets the same behaviour.

         ---Mike

>Jack
>
>
>On Sun, Sep 26, 2010 at 2:57 PM, Mike Tancsa 
><<mailto:mike at sentex.net>mike at sentex.net> wrote:
>At 06:36 PM 9/24/2010, Jack Vogel wrote:
>There is a new revision of the em driver coming next week, its going thru some
>stress pounding over the weekend, if no issues show up I'll put it into HEAD.
>
>Yongari's changes in TX context handling which effects checksum and tso
>are added. I've also decided that multiple queues in 82574 just are a source
>of problems without a lot of benefit, so it still uses MSIX but with 
>only 3 vectors,
>meaning it seperates TX and RX but has a single queue.
>
>
>Thanks, looking forward to trying it out!  With respect to the 
>multiple queues, I thought the driver already used just the one on 
>RELENG_8 ?  If not, is there a way to force the existing driver to 
>use just the one queue ?
>
>On the box that has the NIC locking up, it shows
>
>em1 at pci0:9:0:0: class=0x020000 card=0x34ec8086 chip=0x10d38086 
>rev=0x00 hdr=0x00
>
>    vendor     = 'Intel Corporation'
>    device     = 'Intel 82574L Gigabit Ethernet Controller (82574L)'
>    class      = network
>    subclass   = ethernet
>    cap 01[c8] = powerspec 2  supports D0 D3  current D0
>    cap 05[d0] = MSI supports 1 message, 64 bit enabled with 1 message
>    cap 10[e0] = PCI-Express 1 endpoint max data 128(256) link x1(x1)
>
>and
>
>vmstat -i shows
>
>irq256: em0                      5129063        353
>irq257: em1                       531251         36
>
>in a wedged state, stats look like
>
>dev.em.1.%desc: Intel(R) PRO/1000 Network Connection 7.0.5
>dev.em.1.%driver: em
>dev.em.1.%location: slot=0 function=0 handle=\_SB_.PCI0.PEX4.HART
>dev.em.1.%pnpinfo: vendor=0x8086 device=0x10d3 subvendor=0x8086 
>subdevice=0x34ec class=0x020000
>dev.em.1.%parent: pci9
>dev.em.1.nvm: -1
>dev.em.1.rx_int_delay: 0
>dev.em.1.tx_int_delay: 66
>dev.em.1.rx_abs_int_delay: 66
>dev.em.1.tx_abs_int_delay: 66
>dev.em.1.rx_processing_limit: 100
>dev.em.1.link_irq: 0
>dev.em.1.mbuf_alloc_fail: 0
>dev.em.1.cluster_alloc_fail: 0
>dev.em.1.dropped: 0
>dev.em.1.tx_dma_fail: 0
>dev.em.1.fc_high_water: 18432
>dev.em.1.fc_low_water: 16932
>dev.em.1.mac_stats.excess_coll: 0
>dev.em.1.mac_stats.symbol_errors: 0
>dev.em.1.mac_stats.sequence_errors: 0
>dev.em.1.mac_stats.defer_count: 0
>dev.em.1.mac_stats.missed_packets: 41522
>dev.em.1.mac_stats.recv_no_buff: 19
>dev.em.1.mac_stats.recv_errs: 0
>dev.em.1.mac_stats.crc_errs: 0
>dev.em.1.mac_stats.alignment_errs: 0
>dev.em.1.mac_stats.coll_ext_errs: 0
>dev.em.1.mac_stats.rx_overruns: 41398
>dev.em.1.mac_stats.watchdog_timeouts: 0
>dev.em.1.mac_stats.xon_recvd: 0
>dev.em.1.mac_stats.xon_txd: 0
>dev.em.1.mac_stats.xoff_recvd: 0
>dev.em.1.mac_stats.xoff_txd: 0
>dev.em.1.mac_stats.total_pkts_recvd: 95229129
>dev.em.1.mac_stats.good_pkts_recvd: 95187607
>dev.em.1.mac_stats.bcast_pkts_recvd: 79244
>dev.em.1.mac_stats.mcast_pkts_recvd: 0
>dev.em.1.mac_stats.rx_frames_64: 93680
>dev.em.1.mac_stats.rx_frames_65_127: 1516349
>dev.em.1.mac_stats.rx_frames_128_255: 4464941
>dev.em.1.mac_stats.rx_frames_256_511: 4024
>dev.em.1.mac_stats.rx_frames_512_1023: 2096067
>dev.em.1.mac_stats.rx_frames_1024_1522: 87012546
>dev.em.1.mac_stats.good_octets_recvd: 0
>dev.em.1.mac_stats.good_octest_txd: 0
>dev.em.1.mac_stats.total_pkts_txd: 66775098
>dev.em.1.mac_stats.good_pkts_txd: 66775098
>dev.em.1.mac_stats.bcast_pkts_txd: 509
>dev.em.1.mac_stats.mcast_pkts_txd: 7
>dev.em.1.mac_stats.tx_frames_64: 48038472
>dev.em.1.mac_stats.tx_frames_65_127: 13402833
>dev.em.1.mac_stats.tx_frames_128_255: 5324413
>dev.em.1.mac_stats.tx_frames_256_511: 957
>dev.em.1.mac_stats.tx_frames_512_1023: 319
>dev.em.1.mac_stats.tx_frames_1024_1522: 8104
>dev.em.1.mac_stats.tso_txd: 1069
>dev.em.1.mac_stats.tso_ctx_fail: 0
>dev.em.1.interrupts.asserts: 0
>dev.em.1.interrupts.rx_pkt_timer: 0
>dev.em.1.interrupts.rx_abs_timer: 0
>dev.em.1.interrupts.tx_pkt_timer: 0
>dev.em.1.interrupts.tx_abs_timer: 0
>dev.em.1.interrupts.tx_queue_empty: 0
>dev.em.1.interrupts.tx_queue_min_thresh: 0
>dev.em.1.interrupts.rx_desc_min_thresh: 0
>dev.em.1.interrupts.rx_overrun: 0
>dev.em.1.host.breaker_tx_pkt: 0
>dev.em.1.host.host_tx_pkt_discard: 0
>dev.em.1.host.rx_pkt: 0
>dev.em.1.host.breaker_rx_pkts: 0
>dev.em.1.host.breaker_rx_pkt_drop: 0
>dev.em.1.host.tx_good_pkt: 0
>dev.em.1.host.breaker_tx_pkt_drop: 0
>dev.em.1.host.rx_good_bytes: 0
>dev.em.1.host.tx_good_bytes: 0
>dev.em.1.host.length_errors: 0
>dev.em.1.host.serdes_violation_pkt: 0
>dev.em.1.host.header_redir_missed: 0
>
>ifconfig down/up just panics or locks up the box when its in this 
>state.  I also have IPMI enabled on this nic, but it shows the same 
>issue with it disabled.
>
>        ---Mike
>
>
>
>--------------------------------------------------------------------
>Mike Tancsa,                                      tel +1 519 651 3400
>Sentex 
>Communications, 
><mailto:mike at sentex.net>mike at sentex.net
>Providing Internet since 
>1994                    <http://www.sentex.net>www.sentex.net
>Cambridge, Ontario 
>Canada                         <http://www.sentex.net/mike>www.sentex.net/mike
>

--------------------------------------------------------------------
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