Sorry this might be an extremely stupid question, but can you please explain the benefits of this and what other (larger?) alternatives are? I understand that this "exokernel" provides more performant hardware access for software and it seems to be written from scratch in assembler. Does this mean that one should expect a lot of security and robustness issues, which means it should only be used for internal services…
If you can fit your entire software stack into L3 cache, you never have to access memory and benefit from insanely good latency.
This was a thing in HFT like ~5-7 years ago, where you might have bought a 28 core Xeon, disable all but one or two cores and benefit from ~30mb L3 cache, which can fit an entire Linux Kernel, an SSH server and your trading software.