Re: sched_yield() makes OpenLDAP slow

[Nick Piggin]

Helge Hafting wrote:
> David Schwartz wrote:

> > nothing says that it can't call pthread_mutex_lock and re-acquire the 
> > mutex
> > before any other thread gets around to getting it.
> >  
> Wrong.
> The spec says that the mutex must be given to a waiter (if any) at the
> moment of release.

Repeating myself here...

To me it says that the scheduling policy decides at the moment of release.
What if the scheduling policy decides *right then* to give the mutex to
the next running thread that tries to aquire it?

That would be the logical way for a scheduling policy to decide the next
owner of the mutex.

--
SUSE Labs, Novell Inc.
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