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

[Robbin Ehn]

Thanks Erik!

/Robbin

On 2018-11-23 14:35, Erik Österlund wrote:
> 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
>