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

[Pavel Odintsov]

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