RFR [8038982]: java/lang/ref/EarlyTimeout.java failed again

[Ivan Gerasimov]

Hello!

The test EarlyTimeout.java failed again, now with message "elapsed time 
981 is less than timeout 1000."

The root cause seems to be non-accurate time measurement in Windows:
http://msdn.microsoft.com/en-us/library/windows/desktop/ms724397(v=vs.85).aspx

Because of this we can achieve this result:
long start1 = System.currentTimeMillis();
long start2 = System.nanoTime();
~~~~~~~~
long elapsed2 = (System.nanoTime() - start2) / 1000000;
long elapsed1 = System.currentTimeMillis() - start1;

assert elapsed2 < elapsed1; // can fail


There might be two ways to address the issue:
- add a tolerance > 15 ms, or
- use System.nanoTime() for the measurement.

I did both.

Would you please help review the test fix?

BUGURL: https://bugs.openjdk.java.net/browse/JDK-8038982
WEBREV: http://cr.openjdk.java.net/~igerasim/8038982/0/webrev/

Sincerely yours,
Ivan