Spin Loop Hint support: Draft JEP proposal
aph at redhat.com
Mon Oct 5 09:41:52 UTC 2015
On 04/10/15 17:22, Gil Tene wrote:
> Add an API that would allow Java code to hint that a spin loop is
> being executed.
I don't think this will work for ARM, which has a rather different
Instead of PAUSE, we wait on a lock word with WFE. WFE puts a core
into a lightweight sleep state waiting on a particular address (the
lock word) and a write to the lock word wakes it up. This is very
useful and somewhat analogous to 86's MONITOR/MWAIT.
I can't immediately see how to generalize your proposal to ARM, which
is a shame.
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