RFR(s): 8214180: Need better granularity for sleeping

[Erik Österlund]

Hi Robbin,

Looks good.

Thanks,
/Erik

On 2018-11-21 15:06, Robbin Ehn wrote:
> Hi all, please review.
>
> naked_short_sleep is to coarse grained on contemporary hardware/os:es.
> 1 ms as minimum when we can complete an entire safe-point in 0.5 ms is 
> a very long time.
> Sleeping a very short time instead yielding have several uses-cases.
>
> Here I add it SpinYield to get much smother back-off delay curve.
> Which means it will be usable in more places.
>
> CR:
> https://bugs.openjdk.java.net/browse/JDK-8214180
>
> Webrev:
> http://cr.openjdk.java.net/~rehn/8214180/webrev/
>
> Passes t1-3.
>
> Thanks, Robbin