diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index 2c340e7da458e4fa53b2c08914f1acd976fa90c5..768507e079e23901187d0aae1d1bb00fbe43c232 100644
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -98,6 +98,12 @@ void get_term_dimensions(struct winsize *ws);
 #define CPUINFO_PROC	"cpu model"
 #endif
 
+#ifdef __metag__
+#define rmb()		asm volatile("" ::: "memory")
+#define cpu_relax()	asm volatile("" ::: "memory")
+#define CPUINFO_PROC	"CPU"
+#endif
+
 #include <time.h>
 #include <unistd.h>
 #include <sys/types.h>