On 01/04/2017 04:41 AM, Peter Zijlstra wrote: > On Tue, Jan 03, 2017 at 05:07:54PM -0500, Waiman Long wrote: >> On 01/03/2017 11:18 AM, Peter Zijlstra wrote: >>> On Sun, Dec 25, 2016 at 03:26:01PM -0500, Waiman Long wrote: >>>> A number of cmpxchg calls in qspinlock_paravirt.h were replaced by more >>>> relaxed versions to improve performance on architectures that use LL/SC. >>> Claim without numbers ;-) >> Well it is hard to produce actual numbers here as I don't have the setup >> to gather data. > Surely RHT has big PPC machines around? I know that getting to them is a > wee bit of a bother, but they should be available somewhere.
Yes, RHT does have PPC machines around. It is just I don't have experience dealing with those machines yet. I will try to run some test and include the numbers in the next version of the patch. Cheers, Longman
