Review request for a test fix for 6992968

[David Holmes]

Hi Mandy,

It's hard to evaluate this without knowing what the coordination 
protocol is between the different threads. However you have removed some 
very strange looking synchronization code, and that can only be a good 
thing!

David

Mandy Chung said the following on 10/19/10 08:21:
>  6992968: 
> test/java/lang/management/MemoryMXBean/CollectionUsageThresholdConcMarkSweepGC.sh 
> should not hang
> 
> Webrev at:
>    http://cr.openjdk.java.net/~mchung/6992968/webrev.00/
> 
> If the test fails, the main thread is waiting for the checker thread to 
> finish checking the result but the checker thread terminates with an 
> exception.  The test hangs and the main thread is forever waiting for a 
> monitor to be notified.  I update the test to use the new concurrent 
> utility and reset a CyclicBarrier that causes a BrokenBarrierException 
> to be thrown in the main thread.
> 
> I also add @ignore to CollectionUsageThresholdConcMarkSweepGC.sh test 
> until 6982965 is fixed.
> 
> Mandy
>