[dpdk-dev] i40e: problem with rx packet drops not accounted in statistics
Zhang, Helin
helin.zhang at intel.com
Thu Sep 10 03:09:43 CEST 2015
Hi Martin
Yes, the statistics issue has been reported several times recently.
We will check the issue and try to fix it or get a workaround soon. Thank you very much!
Regards,
Helin
> -----Original Message-----
> From: Martin Weiser [mailto:martin.weiser at allegro-packets.com]
> Sent: Wednesday, September 9, 2015 7:58 PM
> To: Zhang, Helin
> Cc: dev at dpdk.org
> Subject: i40e: problem with rx packet drops not accounted in statistics
>
> Hi Helin,
>
> in one of our test setups involving i40e adapters we are experiencing packet
> drops which are not reflected in the interfaces statistics.
> The call to rte_eth_stats_get suggests that all packets were properly received
> but the total number of packets received through rte_eth_rx_burst is less than
> the ipackets counter.
> When for example running the l2fwd application (l2fwd -c 0xfe -n 4 -- -p
> 0x3) and having driver debug messages enabled the following output is
> generated for the interface in question:
>
> ...
> PMD: i40e_update_vsi_stats(): ***************** VSI[6] stats start
> *******************
> PMD: i40e_update_vsi_stats(): rx_bytes: 242624340000
> PMD: i40e_update_vsi_stats(): rx_unicast: 167790000
> PMD: i40e_update_vsi_stats(): rx_multicast: 0
> PMD: i40e_update_vsi_stats(): rx_broadcast: 0
> PMD: i40e_update_vsi_stats(): rx_discards: 1192557
> PMD: i40e_update_vsi_stats(): rx_unknown_protocol: 0
> PMD: i40e_update_vsi_stats(): tx_bytes: 0
> PMD: i40e_update_vsi_stats(): tx_unicast: 0
> PMD: i40e_update_vsi_stats(): tx_multicast: 0
> PMD: i40e_update_vsi_stats(): tx_broadcast: 0
> PMD: i40e_update_vsi_stats(): tx_discards: 0
> PMD: i40e_update_vsi_stats(): tx_errors: 0
> PMD: i40e_update_vsi_stats(): ***************** VSI[6] stats end
> *******************
> PMD: i40e_dev_stats_get(): ***************** PF stats start
> *******************
> PMD: i40e_dev_stats_get(): rx_bytes: 242624340000
> PMD: i40e_dev_stats_get(): rx_unicast: 167790000
> PMD: i40e_dev_stats_get(): rx_multicast: 0
> PMD: i40e_dev_stats_get(): rx_broadcast: 0
> PMD: i40e_dev_stats_get(): rx_discards: 0
> PMD: i40e_dev_stats_get(): rx_unknown_protocol: 167790000
> PMD: i40e_dev_stats_get(): tx_bytes: 0
> PMD: i40e_dev_stats_get(): tx_unicast: 0
> PMD: i40e_dev_stats_get(): tx_multicast: 0
> PMD: i40e_dev_stats_get(): tx_broadcast: 0
> PMD: i40e_dev_stats_get(): tx_discards: 0
> PMD: i40e_dev_stats_get(): tx_errors: 0
> PMD: i40e_dev_stats_get(): tx_dropped_link_down: 0
> PMD: i40e_dev_stats_get(): crc_errors: 0
> PMD: i40e_dev_stats_get(): illegal_bytes: 0
> PMD: i40e_dev_stats_get(): error_bytes: 0
> PMD: i40e_dev_stats_get(): mac_local_faults: 1
> PMD: i40e_dev_stats_get(): mac_remote_faults: 1
> PMD: i40e_dev_stats_get(): rx_length_errors: 0
> PMD: i40e_dev_stats_get(): link_xon_rx: 0
> PMD: i40e_dev_stats_get(): link_xoff_rx: 0
> PMD: i40e_dev_stats_get(): priority_xon_rx[0]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_rx[0]: 0
> PMD: i40e_dev_stats_get(): priority_xon_rx[1]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_rx[1]: 0
> PMD: i40e_dev_stats_get(): priority_xon_rx[2]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_rx[2]: 0
> PMD: i40e_dev_stats_get(): priority_xon_rx[3]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_rx[3]: 0
> PMD: i40e_dev_stats_get(): priority_xon_rx[4]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_rx[4]: 0
> PMD: i40e_dev_stats_get(): priority_xon_rx[5]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_rx[5]: 0
> PMD: i40e_dev_stats_get(): priority_xon_rx[6]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_rx[6]: 0
> PMD: i40e_dev_stats_get(): priority_xon_rx[7]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_rx[7]: 0
> PMD: i40e_dev_stats_get(): link_xon_tx: 0
> PMD: i40e_dev_stats_get(): link_xoff_tx: 0
> PMD: i40e_dev_stats_get(): priority_xon_tx[0]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_tx[0]: 0
> PMD: i40e_dev_stats_get(): priority_xon_2_xoff[0]: 0
> PMD: i40e_dev_stats_get(): priority_xon_tx[1]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_tx[1]: 0
> PMD: i40e_dev_stats_get(): priority_xon_2_xoff[1]: 0
> PMD: i40e_dev_stats_get(): priority_xon_tx[2]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_tx[2]: 0
> PMD: i40e_dev_stats_get(): priority_xon_2_xoff[2]: 0
> PMD: i40e_dev_stats_get(): priority_xon_tx[3]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_tx[3]: 0
> PMD: i40e_dev_stats_get(): priority_xon_2_xoff[3]: 0
> PMD: i40e_dev_stats_get(): priority_xon_tx[4]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_tx[4]: 0
> PMD: i40e_dev_stats_get(): priority_xon_2_xoff[4]: 0
> PMD: i40e_dev_stats_get(): priority_xon_tx[5]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_tx[5]: 0
> PMD: i40e_dev_stats_get(): priority_xon_2_xoff[5]: 0
> PMD: i40e_dev_stats_get(): priority_xon_tx[6]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_tx[6]: 0
> PMD: i40e_dev_stats_get(): priority_xon_2_xoff[6]: 0
> PMD: i40e_dev_stats_get(): priority_xon_tx[7]: 0
> PMD: i40e_dev_stats_get(): priority_xoff_tx[7]: 0
> PMD: i40e_dev_stats_get(): priority_xon_2_xoff[7]: 0
> PMD: i40e_dev_stats_get(): rx_size_64: 0
> PMD: i40e_dev_stats_get(): rx_size_127: 0
> PMD: i40e_dev_stats_get(): rx_size_255: 0
> PMD: i40e_dev_stats_get(): rx_size_511: 0
> PMD: i40e_dev_stats_get(): rx_size_1023: 0
> PMD: i40e_dev_stats_get(): rx_size_1522: 167790000
> PMD: i40e_dev_stats_get(): rx_size_big: 0
> PMD: i40e_dev_stats_get(): rx_undersize: 0
> PMD: i40e_dev_stats_get(): rx_fragments: 0
> PMD: i40e_dev_stats_get(): rx_oversize: 0
> PMD: i40e_dev_stats_get(): rx_jabber: 0
> PMD: i40e_dev_stats_get(): tx_size_64: 0
> PMD: i40e_dev_stats_get(): tx_size_127: 0
> PMD: i40e_dev_stats_get(): tx_size_255: 0
> PMD: i40e_dev_stats_get(): tx_size_511: 0
> PMD: i40e_dev_stats_get(): tx_size_1023: 0
> PMD: i40e_dev_stats_get(): tx_size_1522: 0
> PMD: i40e_dev_stats_get(): tx_size_big: 0
> PMD: i40e_dev_stats_get(): mac_short_packet_dropped: 0
> PMD: i40e_dev_stats_get(): checksum_error: 0
> PMD: i40e_dev_stats_get(): fdir_match: 0
> PMD: i40e_dev_stats_get(): ***************** PF stats end
> ********************
> ...
>
> The count for rx_unicast is exactly the number of packets we would have
> expected and the count for rx_discards in the VSI stats is exactly the number of
> packets we are missing.
> The question is why this number shows up only in the VSI stats and not in the PF
> stats and of course why the packets which were obviously discarded are still
> counted in the rx_unicast stats.
> This test was performed using DPDK 2.1 and the firmware of the XL710 is the
> latest one (FW 4.40 API 1.4 NVM 04.05.03).
> Do you have an idea what might be going on?
>
> Best regards,
> Martin
>
>
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