PREDICTING OUT-OF-ORDER INSTRUCTION LEVEL PARALLELISM OF THREADS IN A MULTI-THREADED PROCESSOR

摘要

Systems and methods for predicting out-of-order instruction-level parallelism (ILP) of threads being executed in a multi-threaded processor and prioritizing scheduling thereof are described herein. One aspect provides for tracking completion of instructions using a global completion table having a head segment and a tail segment; storing prediction values for each instruction in a prediction table indexed via instruction identifiers associated with each instruction, a prediction value being configured to indicate an instruction is predicted to issue from one of: the head segment and the tail segment; and predicting threads with more instructions issuing from the tail segment have a higher degree of out-of-order instruction-level parallelism. Other embodiments and aspects are also described herein.