Hi, I`m running ubuntu server on gem5 now, and the simulation speed is too slow that it takes couple minutes to complete only one command. Is that normal?

Running gem5 : scons build/x86/gem5.opt config/example/fs.py --kernel=vmlinux --disk-image=x86.img --mem-size=8G

I`ve checked cpu type in config.ini under m5out/, and shows type=AtomicSimpleCPU.

Does anyone know how to speed up gem5 simulation?