Yang Zhang <yang.zhang...@gmail.com> 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

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