[dpdk-dev] Issue with pktgen-dpdk replaying >1500bytes pcap on MCX4

Yongseok Koh yskoh at mellanox.com
Wed Oct 11 20:59:08 CEST 2017

On Thu, Sep 28, 2017 at 08:44:26PM +0000, Wiles, Keith wrote:
> > On Sep 26, 2017, at 8:09 AM, Damien Clabaut <damien.clabaut at corp.ovh.com> wrote:
> > 
> > Hello Keith and thank you for your answer,
> > 
> > The goal is indeed to generate as much traffic per machine as possible (we use pktgen-dpdk to benchmark datacenter routers before putting them on production).
> > 
> > For this we use all available CPU power to send packets.
> > 
> > Following your suggestion, I modified my command to:
> > 
> > ./app/app/x86_64-native-linuxapp-gcc/pktgen -l 0-7 -- -m 1.0 -s 0:pcap/8500Bpp.pcap
> I just noticed you were sending 8500 byte frames and you have to modify Pktgen
> to increase the size of the mbufs in the mempool. I only configure the mbufs
> to 1518 byte buffers or really 2048 byte, but I only deal with 1518 max size.
> The size can be changed, but I am not next to a machine right now.

Hi Damien,

Could you manage to resolve this issue? Keith mentioned pktgen doesn't support
jumbo frames w/o modifying code. Do you still have an issue with Mellanox NIC
and its PMDs? Please let me know.


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