[PATCH v3 0/6] powerpc use pv-qpsinlock as the default spinlock implemention

[Peter Zijlstra]

On Wed, May 25, 2016 at 04:18:03PM +0800, Pan Xinhui wrote:

> _____test________________spinlcok______________pv-qspinlcok_____
> |futex hash	|	556370 ops	|	629634 ops	|
> |futex lock-pi	|	362 ops		|	367 ops		|
> 
> scheduler test:
> Test how many loops of schedule() can finish within 10 seconds on all cpus.
> 
> _____test________________spinlcok______________pv-qspinlcok_____
> |schedule() loops|	322811921 	|	311449290	|
> 
> kernel compiling test:
> build a linux kernel image to see how long it took
> 
> _____test________________spinlcok______________pv-qspinlcok_____
> | compiling takes|	22m 		|	22m		|


s/spinlcok/spinlock/

Is 'spinlcok' the current test-and-set lock?

And what about regular qspinlock, in case of !SHARED_PROCESSOR?