PERF_REG_X86_R8    22 arch/x86/include/uapi/asm/perf_regs.h 	PERF_REG_X86_R8,
PERF_REG_X86_R8    22 tools/arch/x86/include/uapi/asm/perf_regs.h 	PERF_REG_X86_R8,