[dpdk-dev] pcap->eth low TX performance

[Yerden Zhumabekov]

tx burst sends, say, 10-15% percent of a supplied array. The tail is
being ignored so I have to drop it to avoid overflow.
Ethernet device is 82599.

In my app, I transmit all traffic through a ring then feed it to eth.
That leads to overflow as well.

04.09.2015 20:03, Kyle Larose пишет:
> Are you reading from the pcap faster than the device can transmit?
> Does the app hold off reading from the pcap when the ethdev is pushing
> back, or does it just tail drop?
>
> On Fri, Sep 4, 2015 at 12:14 AM, Yerden Zhumabekov
> <e_zhumabekov at sts.kz <mailto:e_zhumabekov at sts.kz>> wrote:
>
>     Hello,
>
>     Did anyone try to work with pcap PMD recently? We're testing our app
>     with this setup:
>
>     PCAP --- rte_eth_rx_burst--> APP-> rte_eth_tx_burst -> ethdev
>
>     I'm experiencing very low TX performance leading to massive mbuf drop
>     while trying to send those packets over the Ethernet device. I tried
>     running ordinary l2fwd and got the same issue with over 80-90% of
>     packets drop. When I substitute PCAP with another ordinary Ethernet
>     device, everything works fine. Can anyone share an idea?
>
>     --
>     Sincerely,
>
>     Yerden Zhumabekov
>     State Technical Service
>     Astana, KZ
>
>

-- 
Sincerely,

Yerden Zhumabekov
State Technical Service
Astana, KZ