Re: [PATCH v4 0/6] powerpc: queued spinlocks and rwlocks

2020-07-27 Thread Michael Ellerman
On Fri, 24 Jul 2020 23:14:17 +1000, Nicholas Piggin wrote: > Updated with everybody's feedback (thanks all), and more performance > results. > > What I've found is I might have been measuring the worst load point for > the paravirt case, and by looking at a range of loads it's clear that > queued

Re: [PATCH v4 0/6] powerpc: queued spinlocks and rwlocks

2020-07-24 Thread Waiman Long
On 7/24/20 9:14 AM, Nicholas Piggin wrote: Updated with everybody's feedback (thanks all), and more performance results. What I've found is I might have been measuring the worst load point for the paravirt case, and by looking at a range of loads it's clear that queued spinlocks are overall bett

[PATCH v4 0/6] powerpc: queued spinlocks and rwlocks

2020-07-24 Thread Nicholas Piggin
Updated with everybody's feedback (thanks all), and more performance results. What I've found is I might have been measuring the worst load point for the paravirt case, and by looking at a range of loads it's clear that queued spinlocks are overall better even on PV, doubly so when you look at the