Scalability and Performance Improvements

Each year CPUs are made with larger core and thread counts, and
running FreeBSD on these new CPUs often demonstrates new scalability
bottlenecks. This project will use a number of motivating use cases,
such as “poudriere -j 128” package builds and “will-it-scale”.

Deficiencies in scalability diagnostic tools (such as LOCK_PROFILING)
may be found and addressed during the work. Improvements in shareable
locks, VFS namecache locking, process management, and performance
improvements in a number of kernel subsystems are the expected
outcomes from this project.