[9] RFR (S) 8080012: JVM times out with vdbench on SPARC M7-16

[Vladimir Kozlov]

The author is Igor Veresov.

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.

I reviewed the fix.

The fix was tested on machine which showed the problem.

Thanks,
Vladimir