RFA 8056248: Improve ForkJoin thread throttling

[Alan Bateman]

On 05/09/2014 10:35, Paul Sandoz wrote:
> Hi,
>
> I would like to backport the improvements to the fork join framework from 9 to 8u40:
>
>    http://mail.openjdk.java.net/pipermail/core-libs-dev/2014-August/028419.html
>
>    https://bugs.openjdk.java.net/browse/JDK-8056248
>
>    http://cr.openjdk.java.net/~psandoz/jdk9/JDK-8056248-fj-thread-throttling/webrev/
>
>    http://hg.openjdk.java.net/jdk9/dev/jdk/rev/7af64e3e095d
>
> The changeset (when shuffled) imports cleanly into jdk8u-dev/jdk.
>
> However, it also introduced a new system property ("java.util.concurrent.ForkJoinPool.common.maximumSpares"). I am not sure if we can add such a new feature to an 8u release, any advice?
It updates the spec so I assume would require a MR if you want this to 
update the Java SE 8 spec.

Maybe the simplest for 8u is to put this under an @implNote so that it's 
clear to anyone generating the javadoc for 8u that this property is 
JDK-implementation specific (at least in in 8u).

-Alan.