Yang Zhang <yang.zhang.wz@xxxxxxxxx> writes: > Some latency-intensive workload will see obviously performance > drop when running inside VM. The main reason is that the overhead > is amplified when running inside VM. The most cost i have seen is > inside idle path. You could test with https://lkml.org/lkml/2017/7/9/204 which optimizes these idle paths with a fast path. If that works it would be a far better solution than explicit tunables and basically giving up by polling. -Andi
