the use volatiles : waiting,complete,totalBorrowTime, totalReturnTime,
nrSamples
is not correct.
for ex the following totalBorrowTime += borrowTime is not atomic resulting in a
race condition.
one way to fix this is using the java.util.concurent Atomic variants or even
better,
make these variables members of MyThread and aggregate them at the end of the
test,
this way there will be no need to use Atomic and thus increasing efficiency,
and
accuracy of the test of the test.
also:
private boolean start;
needs to be volatile, due to visibility issue.
(when updating start other threads might not pick up the value)
cheers
--Zoltan
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