Re: [RFC] netif_rx: receive path optimization

[Jamal Hadi Salim <hadi@xxxxxxxx>]

On Thu, 2005-03-31 at 15:04, Stephen Hemminger wrote:
> Here is another alternative that seems better than the earlier posting. It 
> uses
> a per device receive queue for non-NAPI devices.  The only issue is that then
> we lose the per-cpu queue's and that could impact the loopback device 
> performance.
> If that is really an issue, then the per-cpu magic should be moved to the 
> loopback
> device.
> 

The repurcassions of going from per-CPU-for-all-devices queue
(introduced by softnet) to per-device-for-all-CPUs maybe huge in my
opinion especially in SMP. A closer view of whats there now maybe
per-device-per-CPU backlog queue.
I think performance will be impacted in all devices. imo, whatever needs
to go in needs to have some experimental data to back it

cheers,
jamal