diff --git a/perf.py b/perf.py
index bb1f5b91..1b9de452 100755
--- a/perf.py
+++ b/perf.py
@@ -332,6 +332,15 @@ def perf(options1, args):
     if is_windows:
         pwd1 = "..\\..\\"
 
+    if options.perf_target != "":
+        test_only_r = " sse2-i32x4 sse2-i32x8 sse4-i32x4 sse4-i32x8 sse4-i16x8 \
+                        sse4-i8x16 avx1-i32x8 avx1-i32x16 avx1-i64x4 avx1.1-i32x8 \
+                        avx1.1-i32x16 avx1.1-i64x4 avx2-i32x8 avx2-i32x16 avx2-i64x4 "
+        test_only = options.perf_target.split(" ")
+        for iterator in test_only:
+            if not (" " + iterator + " " in test_only_r):
+                error("unknow option for target: " + iterator, 1)
+
     # check if cpu usage is low now
     cpu_percent = cpu_check()
     if cpu_percent > 20: