Hi
It also happens on a different set of hardware, Flow Control is off in
this scenario.
Any leads ?
Thanks !
NIC statistics:
rx_packets: 18830758
tx_packets: 37113
rx_bytes: 3524962567
tx_bytes: 2171019
rx_errors: 0
tx_errors: 0
rx_dropped: 0
tx_dropped: 0
multicast: 0
collisions: 0
rx_over_errors: 0
rx_crc_errors: 0
rx_frame_errors: 0
rx_fifo_errors: 0
rx_missed_errors: 0
tx_aborted_errors: 0
tx_carrier_errors: 0
tx_fifo_errors: 0
tx_heartbeat_errors: 0
rx_pkts_nic: 28183307
tx_pkts_nic: 38626
rx_bytes_nic: 5423242790
tx_bytes_nic: 2606640
lsc_int: 0
tx_busy: 0
non_eop_descs: 0
broadcast: 3735
rx_no_buffer_count: 0
tx_timeout_count: 0
tx_restart_queue: 0
rx_long_length_errors: 0
rx_short_length_errors: 0
tx_flow_control_xon: 0
rx_flow_control_xon: 0
tx_flow_control_xoff: 0
rx_flow_control_xoff: 0
rx_csum_offload_errors: 0
alloc_rx_page_failed: 0
alloc_rx_buff_failed: 10177
rx_no_dma_resources: 9352549
hw_rsc_aggregated: 0
hw_rsc_flushed: 0
fdir_match: 0
fdir_miss: 0
fdir_overflow: 0
tx_queue_0_packets: 11184
tx_queue_0_bytes: 625603
tx_queue_1_packets: 11517
tx_queue_1_bytes: 689431
tx_queue_2_packets: 14235
tx_queue_2_bytes: 847527
tx_queue_3_packets: 177
tx_queue_3_bytes: 8458
rx_queue_0_packets: 7040617
rx_queue_0_bytes: 1330091185
rx_queue_1_packets: 11790141
rx_queue_1_bytes: 2194871382
rx_queue_2_packets: 0
rx_queue_2_bytes: 0
rx_queue_3_packets: 0
rx_queue_3_bytes: 0
On Tue, Sep 22, 2015 at 8:12 PM, Skidmore, Donald C
<donald.c.skidm...@intel.com> wrote:
> Hey Tal Abudi,
>
> The Fake Tx hang message means that the stack is trying to reset the driver
> since it "thinks" we are hung however the driver doesn't believe that there
> is anything it can transmit. This is most often cased but excessive flow
> control or a faulty switch. What does your ethtool stats show? And you
> might what to test with FC disabled (assuming you have it enabled currently)
> to see if the messages go away.
>
> Thanks,
> -Don Skidmore <donald.c.skidm...@intel.com>
>
>
>> -----Original Message-----
>> From: Tal Abudi [mailto:talab...@gmail.com]
>> Sent: Monday, September 21, 2015 11:37 PM
>> To: e1000-devel@lists.sourceforge.net
>> Subject: [E1000-devel] Fake TX hangs
>>
>> Hi All
>> My system is experiencing strange fake TX hangs. I'm running ixgbe
>> 3.9.15 on a modified 2.6.18 Linux (with multi queue enabled, Per TX queue
>> lock).
>>
>> ixgbe 0000:82:00.1: eth0: Fake Tx hang detected with timeout of 5 seconds
>> NETDEV WATCHDOG: eth0: transmit timed out ixgbe 0000:82:00.1: eth0: Fake
>> Tx hang detected with timeout of 10 seconds NETDEV WATCHDOG: eth0:
>> transmit timed out ixgbe 0000:82:00.1: eth0: Fake Tx hang detected with
>> timeout of 20 seconds
>>
>> And this keeps going on.
>> The messages are from ixgbe_tx_timeout() which is invoked from
>> dev_watchdog() (sch_generic.c)
>>
>> I instrumented the kernel and the ixgbe driver and found that
>> ixgbe_maybe_stop_tx() stop a tx queue in ixgbe_xmit_frame_ring().
>>
>> Please help me figure out where the queue is restart or the device is
>> restarted.
>> Looking at ethtool -S show tx_restart_queue as 0.
>> I'm running a Spirent Avalanche test so it's quite consistent.
>>
>> Any leads ?
>> Thanks !
>>
>> --
>> Best regards,
>> Tal Abudi
>>
>> ------------------------------------------------------------------------------
>> _______________________________________________
>> E1000-devel mailing list
>> E1000-devel@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/e1000-devel
>> To learn more about Intel® Ethernet, visit
>> http://communities.intel.com/community/wired
--
Best regards,
Tal Abudi
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