OS Internals Lab

A configurable model of a kernel — set cores, processes, threads, RAM, I/O operations and locks, then watch the scheduler, context switches, memory, page faults, blocked tasks and lock contention respond; every number is an educational simulation of the mechanisms in this domain, not a measurement of any real machine.

Six buttons that push a simulated system past a limit — memory, locks, threads, disk, descriptors, the stack — each paired with what the real symptom looks like in logs and tools, and the one diagnostic question that separates the failure from its look-alikes.