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* [dts] The semantics of rte_eth_rx_burst and rte_eth_rx_queue_count
@ 2015-07-27 18:04 Masoud Moshref Javadi
  2015-07-27 22:47 ` Masoud Moshref Javadi
  0 siblings, 1 reply; 2+ messages in thread
From: Masoud Moshref Javadi @ 2015-07-27 18:04 UTC (permalink / raw)
  To: dts

Hi,

I don't understand the semantics of these two methods (rte_eth_rx_burst 
and rte_eth_rx_queue_count).

For rte_eth_rx_burst with burst of B.

  * Does that mean it will not return until it receive at least B
    packets? or it just returns with whatever packets that are in the
    NIC's queue?
  * Does that mean it will wait at least x clocks before returning 0 to
    B packets?

For rte_eth_rx_queue_count:

  * Does it go to the NIC and poll the # filled entries at its queue? if
    yes, how much is its overhead?
  * Do we need to call rte_eth_rx_burst (or similar methods) to make it
    updated?


Regards

^ permalink raw reply	[flat|nested] 2+ messages in thread
* Re: [dts] The semantics of rte_eth_rx_burst and rte_eth_rx_queue_count
  2015-07-27 18:04 [dts] The semantics of rte_eth_rx_burst and rte_eth_rx_queue_count Masoud Moshref Javadi
@ 2015-07-27 22:47 ` Masoud Moshref Javadi
  0 siblings, 0 replies; 2+ messages in thread
From: Masoud Moshref Javadi @ 2015-07-27 22:47 UTC (permalink / raw)
  To: dts

Thanks
I figured that out by looking at the source code.

On 7/27/2015 11:04 AM, Masoud Moshref Javadi wrote:
> Hi,
>
> I don't understand the semantics of these two methods 
> (rte_eth_rx_burst and rte_eth_rx_queue_count).
>
> For rte_eth_rx_burst with burst of B.
>
>   * Does that mean it will not return until it receive at least B
>     packets? or it just returns with whatever packets that are in the
>     NIC's queue?
>   * Does that mean it will wait at least x clocks before returning 0
>     to B packets?
>
> For rte_eth_rx_queue_count:
>
>   * Does it go to the NIC and poll the # filled entries at its queue?
>     if yes, how much is its overhead?
>   * Do we need to call rte_eth_rx_burst (or similar methods) to make
>     it updated?
>
>
> Regards
>

^ permalink raw reply	[flat|nested] 2+ messages in thread
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2015-07-27 18:04 [dts] The semantics of rte_eth_rx_burst and rte_eth_rx_queue_count Masoud Moshref Javadi
2015-07-27 22:47 ` Masoud Moshref Javadi

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