Core scheduling lands in 5.14

I believe the "extreme" version of this is what modern GPUs do: fine-grained multithreading. Instead of doing things like branch prediction to keep the pipeline saturated, they simply execute a different thread's instruction with each clock cycle, such that each thread only ever has one instruction at most in the pipeline. Naturally this trades off single-threaded performance and requires keeping as many register files as one has pipeline stages, but it's a pretty elegant solution for maximising throughput if one really does have that many independent threads.