[$] TurboSched: the return of small-task packing
CPU scheduling is a difficult task in the best of times; it is not trivial
to pick the next process to run while maintaining fairness, minimizing
energy use, and using the available CPUs to their fullest potential. The
advent of increasingly complex system architectures is not making things
easier; scheduling on asymmetric systems (such as the big.LITTLE
architecture) is a case in point. The "turbo" mode provided by some recent
processors is another. The TurboSched
patch set from Parth Shah is an attempt to improve the scheduler's
ability to get the best performance from such processors.