RFR 8231264: Disable biased-locking and deprecate all flags related to biased-locking
Patricio Chilano
patricio.chilano.mateo at oracle.com
Sat Nov 16 02:15:55 UTC 2019
Hi all,
Could you review the following patch?
JBS: https://bugs.openjdk.java.net/browse/JDK-8231264
Webrev: http://cr.openjdk.java.net/~pchilanomate/8231264/v01/webrev
Biased locking will be disabled by default and all related flags will be
deprecated. Performance gains seen when the feature was introduced in
the VM are less clear today with modern Java code/processors. Detailed
rationale behind the change is included on the description of the bug.
I modified test gtest/oops/test_markWord.cpp so that it still exercises
other cases of markword printing.
Tested with mach5, tiers1-6 on all platforms (Linux, macOS, Windows and
Solaris).
Thanks,
Patricio
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