This is a kernel 4.14.133 backport of:
[PATCH v6 1/1] sched/fair: Fix low cpu usage with high throttling by removing expiration of cpu-local slices
From Dave Chiluk's patch here: https://lkml.org/lkml/2019/7/23/673
Results of Dave's fibtest reproducer (https://github.com/indeedeng/fibtest)
On a c5.9xlarge ec2 instance:
- CPU: 36 core Intel(R) Xeon(R) Platinum 8124M CPU @ 3.00GHz