TIMING-ACCURATE FULL-SYSTEM MULTIPROCESSOR SIMULATIONS CAN TAKE YEARS BECAUSE OF ARCHITECTURE AND APPLICATION COMPLEXITY. STATISTICAL SAMPLING MAKES SIMULATION-BASED STUDIES FEASIBLE BY PROVIDING TEN-THOUSAND-FOLD REDUCTIONS IN SIMULATION RUNTIME AND ENABLING THOUSAND-WAY SIMULATION PARALLELISM. SIMFLEX: STATISTICAL SAMPLING OF COMPUTER SYSTEM SIMULATION