News for hackers. Stuff that matters.

A comment on Mutexes are faster than Spinlocks. Parent comment

Re:Mutexes are faster than Spinlocks by atq2119 on Saturday January 04, 2020 @12:48PM (#21956223)
That's true, though MWAIT can only be used from kernel mode. At least the docs say that you get a #UD exception if you attempt to use it from user mode.
[ Parent | on HN ]
Re:Mutexes are faster than Spinlocks by the8472 on Saturday January 04, 2020 @12:55PM (#21956264)
Right, there's UMWAIT[0] for that, but that's quite new.

[0] https://www.felixcloutier.com/x86/umwait

[ Parent | on HN ]