Can't allocate different number of TX and RX queues for single port of ixgbe NIC

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

Re: 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-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>:

> 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
>

Re: Can't allocate different number of TX and RX queues for single port of ixgbe NIC

[Pavel Odintsov]

Wow! Thank you so much :) It works fine now!

On Tue, Apr 28, 2015 at 1:57 PM, Vladimir Medvedkin
<medvedkinv-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> 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-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>:
>>
>> 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
>
>



-- 
Sincerely yours, Pavel Odintsov