[dpdk-dev] pcap->eth low TX performance
Yerden Zhumabekov
e_zhumabekov at sts.kz
Mon Sep 7 04:40:59 CEST 2015
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
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