Improving THP Collapse Rate

Transcript

1. Improving THP Collapse Rate Ebru Akagündüz OPW, Linux Kernel Intern ebru.akagunduz@gmail.com Mentor: Rik van Riel
2. • Computer Engineer (graduation date: June, 2014) • Junior System Admin • OPW, Linux Kernel Intern - Round 9 • Contributor free software projects • Likes to discover new things About me:
3. • To improve THP collapse rate ➔ What is THP? ➔ What is benefit of it? ➔ Why do we want to improve its collapse rate? Project aim:
4. • Start reading from do_page_fault() • Detect function that -> collapses pages into a THP -> splits pages to normal sized • How is a page swapped out? • How is a page swapped in? …. …. …. And more questions needed to be answered :) Before making changes ..:
5. How to answer the questions?:
6. Follow call traces and keep:
7. • Detect where I should make changes? -> Discuss with Rik • Be sure what changes are needed? • Return the functions that I already have read before How did I start coding?
8. • Examining oops messages • Using gdb & perf • Creating tracepoints Testing process?
9. • Learning basic functions of memory management • Improving knowledges about the kernel • Working from remote • Working with most successful developers around world • Getting accepted patches in upstream Achievements Through OPW:
10. Thanks!