1. 根目录:
2. tools
3. perf
4. bench
5. mem-memset-x86-64-asm-def.h

MEMSET_FN(__memset,
	"x86-64-unrolled",
	"unrolled memset() in arch/x86/lib/memset_64.S")

MEMSET_FN(memset_c,
	"x86-64-stosq",
	"movsq-based memset() in arch/x86/lib/memset_64.S")

MEMSET_FN(memset_c_e,
	"x86-64-stosb",
	"movsb-based memset() in arch/x86/lib/memset_64.S")