RFR: 8130308 - Too low memory usage in TestPromotionFromSurvivorToTenuredAfterMinorGC.java

[Jesper Wilhelmsson]

Hi,

Please review this fix for TestPromotionFromSurvivorToTenuredAfterMinorGC.java

Basically what happened was:

1. The test stores the amount of used heap
2. Some allocation is done and a series of GCs are called
3. The test keeps track of anything allocated during the test by other threads
4. Verify that the total amount of used old gen is what we expect based on how 
much was allocated.

The problem was that if data was allocated and was still in the survivor space 
it was included in the expected size, but not included in the verification.

Since the test is all about tenured space and verifying that, I decided to 
reduce the expected amount by what's used in the survivor area rather than 
including the survivor area in the verification.

Bug: https://bugs.openjdk.java.net/browse/JDK-8130308
Webrev: http://cr.openjdk.java.net/~jwilhelm/8130308/webrev.00/

Thanks,
/Jesper