[dpdk-users] Beginners question: rte_eth_tx_burst, rte_mbuf access synchronization

[Philipp Beyer]

Hi Anupam,

I'm afraid, I don't get your point.  rte_eth_tx_burst returning a 
reduced buffer count means that TX queue is filled up, doesn't it? I 
don't see why "buffer M does not fit into TX queue" means "buffers 1..N 
already transmitted".

Thanks,
Philipp

Am 11.11.2016 um 13:35 schrieb Anupam Kapoor:
>
> On Fri, Nov 11, 2016 at 3:19 PM, Philipp Beyer <pbeyer at voipfuture.com 
> <mailto:pbeyer at voipfuture.com>> wrote:
>
>     Basically, I need to send the same packet over a single interface,
>     over an over again, with single bytes changed each time.
>     I use rte_eth_tx_burst to send 16 packets at once. As I want to
>     re-use the same buffers in a very simple way, I just increment the
>     refcnt
>     accordingly.
>
>
> just throwing it out there: have you considered a trivial scheme of 
> repeatedly invoking 'rte_eth_tx_burst(...)'​ till a value less than 
> 'nb_pkts' is returned. once you reach that state, then the reuse can 
> happen...
>
> --
> kind regards
> anupam
> ​
>
> In the beginning was the lambda, and the lambda was with Emacs, and 
> Emacs was the lambda.