Re: [RFC PATCH v1 00/11] Create fast idle path for short idle periods

Wanpeng Li
2017-07-10T09:29:02Z

2017-07-10 16:46 GMT+08:00 Peter Zijlstra <peterz@infradead.org>:
> On Mon, Jul 10, 2017 at 09:38:30AM +0800, Aubrey Li wrote:
>> We measured 3%~5% improvemnt in disk IO workload, and 8%~20% improvement in
>> network workload.
>
> Argh, what a mess :/

Agreed, this patchset is a variant of
https://lkml.org/lkml/2017/6/22/296 As I mentioned before, we should
not churn the core path.

Regards,
Wanpeng Li

>
> So how much of the gain is simply due to skipping NOHZ? Mike used to
> carry a patch that would throttle NOHZ. And that is a _far_ smaller and
> simpler patch to do.