Draft JEP on enhanced volatiles

Mike Duigou mike.duigou at oracle.com
Mon Feb 10 23:43:43 UTC 2014

On Feb 10 2014, at 04:33 , Doug Lea <dl at cs.oswego.edu> wrote:

> Among the constraints on solution is that several of these
> methods compile down to no-ops on many common platforms.

This is interpreted as a benefit. However, if the are no-ops only for the most common platform (x86) then we are likely to see a rough path for other platforms. Incorrect or inconsistent usage of these methods in user code will, instead of having no effect, result in unexpected and possibly mysterious runtime failures on other platforms. The JVM has been pretty good about hiding these differences thus far. It would be nice to see a "least common denominator" non-no-op mode as part of the VM implementation that provided the opportunity to test in the most pessimistic conditions.


More information about the core-libs-dev mailing list