Real-Time Performance & Cycle Accuracy of laysim-GR740
Real-Time Performance & Cycle Accuracy of laysim-GR740 In general, a processor emulator based on interpretation method cannot not satisfy the real-time performance of guest CPU when the guest CPU operates at 70MHz or higher. A processor emulator adopting dynamic binary translation (JIT) method can achieve its real-time performance to 500 MIPS at maximum (for laysim-LEON3-PRO ), so it can meet the real-time performance of single core of GR740 processor which runs at 250MHz. However, a processor emulator based on DBT can never satisfy real-time performance of GR740 under SMP multicore environment. When analyzing the performance of laysim-GR740 with various multi-core benchmarking programs such as NPB, SPEC 2012 OMP and RTEMS5-SMP, the real-time performance of laysim-gr740-dbt can achieve 46.64% performance at maximum and 30.87% performance at average. So KARI/FSW team is developing a new processor emulator which based on multi-thread framework with DBT to satisfy the real-time perf