From: Troy Kisky <troy.ki...@boundarydevices.com> Date: Tue, 5 Apr 2016 19:25:51 -0700
> By clearing the NAPI interrupts in the NAPI routine > and not in the interrupt handler, we can reduce the > number of interrupts. We also don't need any status > variables as the registers are still valid. > > Also, notice that if budget pkts are received, the > next call to fec_enet_rx_napi will now continue to > receive the previously pending packets. > > To test that this actually reduces interrupts, try > this command before/after patch > > cat /proc/interrupts |grep ether; \ > ping -s2800 192.168.0.201 -f -c1000 ; \ > cat /proc/interrupts |grep ether > > For me, before this patch is 2996 interrupts. > After patch is 2010 interrupts. > > Signed-off-by: Troy Kisky <troy.ki...@boundarydevices.com> I really don't think this is a good idea at all. I would instead really rather see you stash away the status register values into some piece of software state, and then re-read them before you are about to finish a NAPI poll cycle.
