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The Capacity Aware Superset Scheduler (CASS) optimizes runqueue selection of CFS tasks. By using CPU capacity as a basis for comparing the relative utilization between different CPUs, CASS fairly balances load across CPUs of varying capacities. This results in improved multi-core performance, especially when CPUs are overutilized because CASS doesn't clip a CPU's utilization when it eclipses the CPU's capacity. As a superset of capacity aware scheduling, CASS implements a hierarchy of criteria to determine the better CPU to wake a task upon between CPUs that have the same relative utilization. This way, single-core performance, latency, and cache affinity are all optimized where possible. CASS doesn't feature explicit energy awareness but its basic load balancing principle results in decreased overall energy, often better than what is possible with explicit energy awareness. By fairly balancing load based on relative utilization, all CPUs are kept at their lowest P-state necessary to satisfy the overall load at any given moment. This version of CASS is adjusted to work on older kernels. Change-Id: Idc53a0318e80c7b1a39475aaf3642dfe46f774af Signed-off-by: Sultan Alsawaf <sultan@kerneltoast.com> Signed-off-by: Richard Raya <rdxzv.dev@gmail.com>