On Wed, 2012-05-02 at 12:08 +0800, Deng-Cheng Zhu wrote:

Unfortunately, on the Malta platform, NIC irqs are not suitable for SMP
IRQ affinity -- they are based on XT-PIC. However, I did do some RPS
tests where different CPU masks were assigned to the 2 NICs. And the
throughput *WAS* better than that of assigning the same mask to NICs.
But the problem addressed in this patch *STILL* exists -- hash indexing
causes imbalance across CPUs in the case of sparse connections.

You mean your two NIC irqs are handled by CPU0 and this cant be
changed ?

That really is bad.