A computer system includes N multi-threaded processors and an operating system. The N multi-threaded processors each have O hardware threads forming a pool of P hardware threads, where N, O, and P are positive integers and P is equal to N times O. The operating system includes a scheduler which receives events for one or more computing jobs. The scheduler receives one of the events and allocates R hardware threads of the pool of P hardware threads to one of the computing jobs by optimizing a sum of priorities of the computing jobs, where each priority is based in part on the number of logical processors requested by a corresponding computing job and R is an integer that is greater than or equal to 0.
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