On Tue, Oct 16, 2018 at 09:45:06AM -0400, Waiman Long wrote: > Queued spinlock supports up to 4 levels of lock slowpath nesting - > user context, soft IRQ, hard IRQ and NMI. However, we are not sure how > often the nesting happens. So 3 more per-cpu stat counters are added > to track the number of instances where nesting index goes to 1, 2 and > 3 respectively. > > On a dual-socket 64-core 128-thread Zen server, the following were stat > counter values under different circumstances. > > State slowpath index1 index2 index3 > ----- -------- ------ ------ ------- > After bootup 1,012,150 82 0 0 > After parallel build + perf-top 125,195,009 82 0 0
Would probably be good to check a network workload.
