On Sat, 2 Apr 2016, Peter Zijlstra wrote:
> On Sat, Apr 02, 2016 at 11:09:20AM -, Thomas Gleixner wrote:
> > To undo the attachment each involved thread needs to call
> >
> > pthread_mutex_detach_np(&mutex);
> >
> > When the last user detaches the kernel state is destroyed.
>
> S
On Sat, Apr 02, 2016 at 06:30:59PM +0200, Peter Zijlstra wrote:
> On Sat, Apr 02, 2016 at 11:09:20AM -, Thomas Gleixner wrote:
> > pthread_mutexes on Linux are based on the futex mechanism. The standard
> > futex
> > mechanism in the Linux kernel uses a global hash to store transient
> > state
On Sat, Apr 02, 2016 at 11:09:20AM -, Thomas Gleixner wrote:
> pthread_mutexes on Linux are based on the futex mechanism. The standard futex
> mechanism in the Linux kernel uses a global hash to store transient
> state. Collisions on that hash can lead to performance degradation and on
> real-t
pthread_mutexes on Linux are based on the futex mechanism. The standard futex
mechanism in the Linux kernel uses a global hash to store transient
state. Collisions on that hash can lead to performance degradation and on
real-time enabled kernels even to priority inversions.
To guarantee futexes wi
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