RFR 8215047: Task terminators do not complete termination in consistent state

[zgu at redhat.com]

> Updated Webrev: http://cr.openjdk.java.net/~zgu/JDK-8215047/webrev.02
> /i
> ndex.html
> 
> Passed hotspot_gc test, will rerun all other tests.

Passed hotspot_gc and vmTestbase_vm_gc on Linux x64 (fastdebug and
release), also submit tests.

Thanks,

-Zhengyu

> 
> > As an additional enhancement, it might be worth doing padding of
> > the
> > ParallelTaskTerminator::_offered_termination variable.
> > 
> 
> I filed a separate RFE: https://bugs.openjdk.java.net/browse/JDK-8217
> 78
> 5
> 
> 
> -Zhengyu
> 
> 
> > Thanks,
> >   Thomas
> > 
> >