[kernel] Add a tool for diagnosing where time is spent in the frontend.

BUG=
R=kmillikin@google.com, kustermann@google.com

Review URL: https://chromereviews.googleplex.com/442627013 .
1 file changed
tree: 8f15a16a1d233a84b20128baff2e10fc07d4af3d
  1. pkg/