On 04/03/2019 09:12 AM, Peter Zijlstra wrote: > On Thu, Feb 28, 2019 at 02:09:41PM -0500, Waiman Long wrote: >> For an uncontended rwsem, count and owner are the only fields a task >> needs to touch when acquiring the rwsem. So they are put next to each >> other to increase the chance that they will share the same cacheline. > Did you try and micro-bench this? > I haven't tried to micro-bench that as the one that I used will have both owner and count in the same cacheline. I need to construct one with all sort of different cacheline offfset to see if that makes a difference. I will do so.
Thanks, Longman
