Abstract: Methods and apparatus to schedule operations in computing systems are disclosed. An example method includes determining, by executing an instruction with a processor, that an operation identifier is inactive, the operation identifier assigned to a first operation, the operation identifier utilized by the processor to allocate computing resources of a computing system to the first active operation and in response to a request for assignment of an operation identifier to a second operation: freeing, by executing an instruction with a processor, the operation identifier from the first operation, and assigning, by executing an instruction with a processor, the operation identifier to the second operation.