To study how chips work, MIT researchers built their own operating system
MIT researchers have developed a new operating system kernel called Fractal to study modern processors in detail. This innovative system allows for cleaner experimental setups by running directly on hardware without interference from other software. Initial findings on Apple's M1 processor revealed new insights into speculative attacks and the behavior of branch predictors.
- ▪Fractal is designed to provide a clean experimental environment for studying processor behavior.
- ▪The operating system runs directly on hardware, eliminating background noise from other software.
- ▪Researchers discovered that the M1 processor is still susceptible to a class of speculative attack known as 'Phantom.'
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| Original publisher | Mit |
| Canonical URL | https://www.csail.mit.edu/news/study-how-chips-really-work-mit-researchers-built-their-own-operating-system |
| Publication time | Thu, 21 May 2026 02:38:46 +0000 |
| Retrieval time | 2026-05-21T03:05:03.342Z |
| Last seen | 2026-05-21T03:05:03.342Z |
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Back to News May 19 '26 To study how chips really work, MIT researchers built their own operating system Written By Rachel Gordon When security researchers want to understand what a modern processor is really doing with the kind of detail that determines whether attacks like Spectre and Meltdown are possible, they usually run their experiments on top of an operating system that was never built for the job. They open up macOS or Linux, patch the kernel by hand, and hope the modifications hold. The approach is unstable, hard to reproduce, and on Apple's platforms, slated for deprecation.A team at MIT's Computer Science and Artificial Intelligence Laboratory (CSAIL) decided to build something different.
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