[8u60] backport (S) 8080012: JVM times out with vdbench on SPARC M7-16

[Vladimir Kozlov]

I would like to backport this to 8u60 (through 8u).  Patch was applied cleanly. Backport was approved by release team.

https://bugs.openjdk.java.net/browse/JDK-8080012
jdk9 webrev: http://cr.openjdk.java.net/~kvn/8080012/webrev/

On big SPARC machines (>1k cores) request for cacheline in PICL takes a lot of time since we asking it for each core. 
PICL daemon can't handle such stream of requests especially when several JVMs start at the same time (vdbench test).

We were told that on sun4v machines (SPARC-T and -M series) you can't have different chips with different cache line 
size. So we can ask only one core.

Thanks,
Vladimir