Scheduling system resources. A system resource scheduling policy for scheduling operations within a workload is accessed. The policy is specified on a workload basis such that the policy is specific to the workload. System resources are reserved for the workload as specified by the policy. Reservations may be hierarchical in nature where workloads are also hierarchically arranged. Further, dispatching mechanisms for dispatching workloads to system resources may be implemented independent from policies. Feedback regarding system resource use may be used to determine policy selection for controlling dispatch mechanisms.
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