[dpdk-dev] Can't allocate different number of TX and RX queues for single port of ixgbe NIC

[Vladimir Medvedkin]

Hi Pavel,

I think mistake is here:
-int eth_configure_ret = rte_eth_dev_configure(current_port, tx_queues,
rx_queues, &default_port_conf);
+int eth_configure_ret = rte_eth_dev_configure(current_port, rx_queues,
tx_queues, &default_port_conf);
according to
http://dpdk.org/doc/api/rte__ethdev_8h.html#ac30d075b4b206c7122e200164ce69893
second arg is number of rx queues

Regards,
Vladimir

2015-04-28 13:02 GMT+03:00 Pavel Odintsov <pavel.odintsov at gmail.com>:

> Hello, Network Performance Gurus!
>
> I have Debian Jessie with 3.16 kernel, DPDK 2.0.0 with ixgbe NIC. And
> I wrote following code:
> https://gist.github.com/pavel-odintsov/e1f64de4d56c0ab1b37c
>
> I try to allocate 2 queues for TX and only 1 queue for RX and I can't
> do it with error (detailed error message
> https://gist.github.com/pavel-odintsov/507cf7a082793f547120):
> PMD: ixgbe_dev_rx_queue_setup(): sw_ring=0x7f9e9dcdbc80
> hw_ring=0x7f9e9dd41500 dma_addr=0x36b41500
> PMD: ixgbe_dev_tx_queue_setup(): sw_ring=0x7f9e9dcd9b40
> hw_ring=0x7f9e9dd51580 dma_addr=0x36b51580
> PMD: ixgbe_set_tx_function(): Using simple tx code path
> PMD: ixgbe_set_tx_function(): Vector tx enabled.
> EAL: Error - exiting with code: 1
>   Cause: Can't configure TX queue 1 for port 0
>
> I could fix this issue with allocation 2 queues for TX and 2 queues
> for RX. But it's useless for my aplication because I need multiple TX
> queue but could use only one RX and I want ability to specify
> different number of queues for NIC.
>
> Thank you so much!
>
> --
> Sincerely yours, Pavel Odintsov
>