[9] RFR(S): [TESTBUG] Whitebox tests fail with -XX:CompileThreshold=100

Tobias Hartmann tobias.hartmann at oracle.com
Wed Oct 15 08:47:07 UTC 2014


please review the following patch.

Bug: https://bugs.openjdk.java.net/browse/JDK-8060454
Webrev: http://cr.openjdk.java.net/~thartmann/8060454/webrev.00/

The problem is that with a low CompileThreshold we execute the loop to trigger 
osr compilation fewer times. While the osr compilation should be triggered there 
is still a non-osr compilation request in the compile queue and therefore the 
osr compilation fails (see 'compilation_is_in_queue(method)' check in 

I moved the call to 'waitAndDeoptimize' from the warmup methods to the osr 
triggering methods to make sure that no non-osr compilation is in the queue 
after warmup.

Maybe we should think about allowing both osr and non-osr compilations in the 
compile queue at the same time. Currently, we check this with the access flag 
'JVM_ACC_QUEUED'. Unfortunately, it is not possible to simply add a new flag for 
osr compilations because all bitmasks are taken.

Executed failing tests on JPRT with different VM options (this time including 
-XX:CompileThreshold). Results are attached to bug.


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