EMT: An OS Framework for New Memory Translation Architectures
summary
EMT is an OS framework that ports Linux memory management onto a hardware‑neutral MMU interface, enabling radix, hash, and direct‑map translation schemes with concrete results: an ECPT MMU driver implemented in <700 LOC for ECPT driver> runs in a QEMU‑hosted platform that feeds backends for cycle‑accurate simulation (QEMU‑hosted emulation + backend simulators), shows 0.2% overhead vs vanilla Linux, uncovers a hash‑table self‑move paradox and a fix that tolerates transient duplicated PTEs, and finds ECPT reduces hardware misses but increases page‑fault handler work.
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chapters (9)
- 0:00EMT framework intro
- 3:50EMT design overview
- 7:45EMT abstractions
- 9:11Hardware optimization functions
- 11:57EMT performance
- 12:59EMT open platform
- 14:04Hash page tables in OS
- 15:52MMU design trade-offs
- 16:36Conclusion
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