[dpdk-dev] Polling too often at lower packet rates?

[Stephen Hemminger]

On Thu, 9 Apr 2015 15:26:23 -0300
Aaron Campbell <aaron at arbor.net> wrote:

> Hi Stephen,
> 
> Thanks, that was an informative talk.  In this case, are you referring to your comments about the thermal budget?
> 
> That’s definitely interesting, but there must be more to it than that.  Again, if I loop over all 6 ports (i.e., continue to keep the CPU busy), it works around the problem.
> 
> I agree that adaptive polling makes sense and will look into it.  But will still take any further ideas on what is going on here.
> 
> -Aaron

Your excess polling consumes PCI bandwidth which is a fixed resource.