[dpdk-users] Strange Packet Loss with number of flows.

[Stephen Hemminger]

On Thu, 26 Sep 2019 10:10:25 +0530
Dheeraj Dang <dheerajdang138 at gmail.com> wrote:

> Hi,
> 
> I am having a problem with packet loss and I hope you can help me out.
> When we increase the number of flows, PPM value must increase. I observed
> this behavior to some point, but after that PPM value reduces. Below you
> find the description of application, workload, and observations.
> 
> *Application*
> I have a server-client application, a single server, and single client.
> Both machines are using multiple queues to send or receive packets.
> 
> 
> *Workload*
> I'm running dpdk with fixed PPS value i.e 2 Mpps.
> I'm increasing the number of flows to see the impact on PPM value.
> I'm changing UDP port range to generate the number of flows.
> 
> 
> *Observations*
> Target MPPS Flows PPM
> 2 2 100
> 2 100 670
> 2 1000 3136
> 2 5000 265878
> 2 10000 106316
> *I was expecting PPM value to rise for 10K flows, but its value reduces.*
> Please share your suggestions.
> 
> Regards
> Dheeraj Dang

What DPDK version? What OS? What hardware?
Did you look at xstats in DPDK?