Re: [PATCH rcu-dev] rcu/trace: Add tracing for how segcb list changes

2020-11-16 Thread Paul E. McKenney
On Sat, Nov 14, 2020 at 02:31:32PM -0500, Joel Fernandes (Google) wrote: > Track how the segcb list changes before/after acceleration, during > queuing and during dequeuing. > > This has proved useful to discover an optimization to avoid unwanted GP > requests when there are no callbacks accelerat

[PATCH rcu-dev] rcu/trace: Add tracing for how segcb list changes

2020-11-14 Thread Joel Fernandes (Google)
Track how the segcb list changes before/after acceleration, during queuing and during dequeuing. This has proved useful to discover an optimization to avoid unwanted GP requests when there are no callbacks accelerated. The overhead is minimal as each segment's length is now stored in the respectiv