[dpdk-dev] [PATCH v2 2/3] net/af_xdp: support pinning of IRQs

[Varghese, Vipin]

Hi Ciara,

snipped
> 
> ifaces  no pinning  pinning
> 1       9059100     9171612
> 2       9261635     18376552
> 3       9332804     27696702
> 
> For the no-pinning case, all IRQs are landing on the default core 0, which
> results in very poor scaling versus the pinned case where scaling is linear.

Thanks for the information, but a question here `Is the reason for landing all IRQ on core '0' is because the Kernel CMD line 'isol or no interupts' is done for all expect core 0?`

If the cores are not isolated and no interrupts are redirected; normally `cat /proc/interrupts` shows IRQ mask to cores. Depending upon FDIR (intel X522 and X710) this could be core 0 or 'n-1'?

> 
> Thanks,
> Ciara
> 
> >
> > It should be possible to rework the code to remove the regexes and use
> > a direct string compare. Would that make the solution more palatable?
> >
> > Let me know what you think.
> >
> > Thanks,
> > Ciara