Update: After some significant back-and-forth between Doug and I on naming and
JavaDoc'ing, and with Martin (Thompson) stepping in to help, we have what we
think is a good spec and name selection for this thing. We're proposing to add
a new static method to the Runtime class:
class Runtime { /...
/**
* Method signifying that the caller is momentarily unable to
* progress until the occurrence of one or more actions of one or
* more other activities. When invoked within each iteration, this
* method typically improves performance of spin wait loop
* constructions.
*/
public static void onSpinWait() {};
}
See updated details, including a link to the updated JEP draft, as well as
links to working prototype implementations, webrevs against OpenJDK9b94, and
example here: https://github.com/giltene/GilExamples/tree/master/SpinWaitTest
<https://github.com/giltene/GilExamples/tree/master/SpinWaitTest> . All names
have changed to reflect the new naming (onSpinWait,
-XX:+UseOnSpinWaitIntrinsic, SpinWaitTest, etc.).
As an interesting stat, the total changes in the WebRevs amount to 78 added
lines (across 14 files) , and 0 lines removed or changed. Hopefully a good
indication of relatively low footprint and risk.
— Gil.
