RFR: 8205024: ZGC: Worker threads boost mode not always enabled when is should be

[Stefan Karlsson]

Looks good.

StefanK

On 2018-06-14 11:47, Per Liden wrote:
> There's a race when deciding if worker threads should be boosted (very 
> similar to the race in JDK-8205022), which can result in worker threads 
> not being boosted when they should. The effect of this is that the GC 
> cycle takes longer to complete, which in turn means that stalled threads 
> wait longer than they would have done otherwise.
> 
> The solution to this is very similar to the solution to JDK-8205022.
> 
> Bug: https://bugs.openjdk.java.net/browse/JDK-8205024
> Webrev: http://cr.openjdk.java.net/~pliden/8205024/webrev.0
> 
> Testing: tier{1,2,3,4}
> 
> /Per