On Mon, Jul 28, 2014 at 12:20:07PM +0900, Kengo NAKAHARA wrote: > > I think analyzing interrupt rates, deciding which IRQ's interrupts > shuld be moved and deciding which CPU is assigned the moved interrupts > are complex.
I think this may prove counterproductive. For one reason, it may cause harmful cache behavior as the datastructures associated with the same network flow move from one CPU to another as packets are received on different interfaces for the transmit and receive directions. I think you really don't want to do anything that could impede the use of hardware classifiers to put the packets for the same flow on the same CPUs' queues -- and balancing interrupts in userspace rather than in the kernel seems to me likely to do just that. Thor
