Re: Question about cacheline bounching with percpu-rwsem and rcu-sync

2019-06-09 Thread Joel Fernandes
On Sun, Jun 09, 2019 at 05:22:26AM -0700, Paul E. McKenney wrote: > On Sat, Jun 08, 2019 at 08:24:36PM -0400, Joel Fernandes wrote: > > On Fri, May 31, 2019 at 10:43 AM Joel Fernandes > > wrote: > > [snip] > > > > > > > > Either way, it would be good for you to just try it. Create a kernel > > >

Re: Question about cacheline bounching with percpu-rwsem and rcu-sync

2019-06-09 Thread Paul E. McKenney
On Sat, Jun 08, 2019 at 08:24:36PM -0400, Joel Fernandes wrote: > On Fri, May 31, 2019 at 10:43 AM Joel Fernandes > wrote: > [snip] > > > > > > Either way, it would be good for you to just try it. Create a kernel > > > module or similar than hammers on percpu_down_read() and percpu_up_read(), >

Re: Question about cacheline bounching with percpu-rwsem and rcu-sync

2019-06-08 Thread Joel Fernandes
On Fri, May 31, 2019 at 10:43 AM Joel Fernandes wrote: [snip] > > > > Either way, it would be good for you to just try it. Create a kernel > > module or similar than hammers on percpu_down_read() and percpu_up_read(), > > and empirically check the scalability on a largish system. Then compare >