RFR (S) CR 8014966: Add the proper Javadoc to @Contended (original) (raw)

Peter Levart peter.levart at gmail.com
Thu May 23 17:37:54 UTC 2013

Hi Aleksey,

What's not very clear is whether the class-level @Contended is the same as class-level @Contended("group") - is the tag used or ignored when specified on the class-level. What does the following do?

@Contended("x") class C { @Contended("x") int a; @Contended("y") int b; int c; }

Regards, Peter

On 05/23/2013 06:16 PM, Aleksey Shipilev wrote:

On 05/23/2013 07:57 PM, Peter Levart wrote:

Have I understood this correctly? Yes. @Contended on class is currently the shorthand for the @Contended with the same (but unknown) tag over all the fields. However, in future this might change, because @Contended on class might also guard the object header, as soon as we are brave enough to tap into the GC interface to allocate the @C objects aligned for the cache line boundary. -Aleksey.

More information about the core-libs-dev mailing list