Hi Fabio,
Have you tried to specify EAL option --log-level="pmd.net.igc,debug"
or --log-level='.*',8 when running the application? Perhaps doing
so can trigger printouts [1], [2]. See if you can't observe those.
Perhaps consider posting a brief excerpt of your code where
rte_eth_rx_burst() is invoked and return value is verified.
Also, albeit unrelated, it's rather peculiar that the code
does CPU-to-LE conversion [3] of descriptor status, but
the field itslef is declared as __le32 already: [4].
[1] https://github.com/DPDK/dpdk/blob/v24.03/drivers/net/igc/igc_txrx.c#L296
[2] https://github.com/DPDK/dpdk/blob/v24.03/drivers/net/igc/igc_txrx.c#L455
[3] https://github.com/DPDK/dpdk/blob/v24.03/drivers/net/igc/igc_txrx.c#L264
[4]
https://github.com/DPDK/dpdk/blob/v24.03/drivers/net/igc/base/igc_base.h#L109
Thank you.
On Thu, 1 Aug 2024, Fabio Fernandes wrote:
Hi,
I have an issue with rte_eth_rx_burst() for IGC poll mode driver never
returning any packets and need some advice.
I have this network port:
09:00.0 Ethernet controller: Intel Corporation Ethernet Controller I225-V (rev
03)
Bound to igb_uio:
Network devices using DPDK-compatible driver
============================================
0000:09:00.0 'Ethernet Controller I225-V 15f3' drv=igb_uio unused=igc
I'm testing this both with testpmd and my own app, which works fine with other
drivers such as net/ena and net/i40e. I'm using single RX/TX queue pair with
default configs
with rte_eth_promiscuous_enable() and rte_eth_allmulticast_enable().
The device seems to rte_eth_dev_start() fine, and rte_eth_stats_get() seem to
be detecting inbound packets. Below is the output from testpmd:
Press enter to exiteth_igc_interrupt_action(): Port 0: Link Up - speed
1000 Mbps - full-duplex
Port 0: link state change event
^CTelling cores to stop...
Waiting for lcores to finish...
---------------------- Forward statistics for port 0 ----------------------
RX-packets: 129 RX-dropped: 800 RX-total: 929
TX-packets: 0 TX-dropped: 0 TX-total: 0
----------------------------------------------------------------------------
+++++++++++++++ Accumulated forward statistics for all ports+++++++++++++++
RX-packets: 129 RX-dropped: 800 RX-total: 929
TX-packets: 0 TX-dropped: 0 TX-total: 0
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
Done.
However, rte_eth_rx_burst() never returns anything, neither in testpmd nor in
my own app.
In my own app, I log both rte_eth_stats_get() and non-zero xstats from
rte_eth_xstats_get_by_id():
07:02:13.406873186 INF stats.rx : 0
07:02:13.406892616 INF dev_stats.ipackets : 78
07:02:13.406903636 INF dev_stats.opackets : 0
07:02:13.406914166 INF dev_stats.imissed : 0
07:02:13.406924536 INF dev_stats.ierrors : 0
07:02:13.406934116 INF dev_stats.oerrors : 0
07:02:13.406943956 INF dev_stats.rx_nombuf : 0
07:02:13.407247777 INF xstats rx_good_packets : 78
07:02:13.407257147 INF xstats rx_good_bytes : 17205
07:02:13.407265267 INF xstats rx_size_64_packets : 6
07:02:13.407274627 INF xstats rx_size_65_to_127_packets : 31
07:02:13.407285757 INF xstats rx_size_128_to_255_packets : 22
07:02:13.407297537 INF xstats rx_size_256_to_511_packets : 16
07:02:13.407309127 INF xstats rx_size_512_to_1023_packets : 3
07:02:13.407321327 INF xstats rx_broadcast_packets : 8
07:02:13.407331597 INF xstats rx_multicast_packets : 64
07:02:13.407346357 INF xstats rx_total_packets : 78
07:02:13.407355547 INF xstats rx_total_bytes : 17205
07:02:13.407364127 INF xstats rx_sent_to_host_packets : 78
07:02:13.407375347 INF xstats interrupt_assert_count : 1
Still, rte_eth_rx_burst() never returns anything.
It's worthwhile to note that rte_eth_rx_burst() works fine when I, instead of
net/igc, use net/ena (with ENA card) or net/i40e (Intel x710 card).
The debug log from EAL and net/igc is attached, in case that helps.
There's a warning "igc_rx_init(): forcing scatter mode", but I've already tried
changing my mbuf sizes so that the warning goes away but that also didn't help.
Any advice?
Thanks,
Fabio
