[sujayakar]

I really enjoyed this talk.

How does a system with completely static resource allocation accommodate cases where the underlying hardware is actually dynamic? For example, consider hot-plugging USB devices or storage media.

Would there be a fixed "maximum number of USB devices," with resources reserved at compile time for the maximum? If so, does this preclude high resource utilization in the common case, where the user isn't hitting these limits?

[mkeeter]

In the past, I've worked on real-time systems which deliberately run in "worst-case" load all the time, basically to avoid your second concern: if high resource utilization is possible, then you have to design for it, and this is an easy way to make sure the system doesn't fall over.

For example, if you're building a system that does controls multiple motors, you'd naively do motion-planning calculations for only the motors that are actively running. If instead you do these calculations for every motor all the time, even the ones that aren't moving, you'll have a worst-case performance profile; if it still works, then you can be more confident about the system.

(I work at Oxide, but only for about a month, so this is more past experience than Hubris-specific)