Re: [PATCH][RFC]: mutex: adaptive spin

Ingo Molnar
2009-01-06T13:16:43Z

* Gregory Haskins <ghaskins@novell.com> wrote:

> Ingo Molnar wrote:
> > There's no time or spin-rate based heuristics in this at all (i.e. these
> > mutexes are not 'adaptive' at all!),
>
> FYI: The original "adaptive" name was chosen in the -rt implementation
> to reflect that the locks can adaptively spin or sleep, depending on
> conditions. I realize this is in contrast to the typical usage of the
> term when it is in reference to the spin-time being based on some
> empirical heuristics, etc as you mentioned. Sorry for the confusion.

the current version of the -rt spinny-mutexes bits were mostly written by
Steve, right? Historically it all started out with a more classic
"adaptive mutexes" patchset so the name stuck i guess.

Ingo