| From | Andi Kleen <> | Subject | Re: [RFC PATCH v2 0/7] x86/idle: add halt poll support | Date | Tue, 29 Aug 2017 06:03:26 -0700 |
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Yang Zhang <yang.zhang.wz@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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