Output regression results as csv

Change-Id: Ibda3bdfee8de50a5d15ac6562a60b00da8e770d4

tests/regression/benchdnn_comparison.py

@@ -41,14 +41,24 @@ def compare_two_benchdnn(file1, file2, tolerance=0.05):
     if len(r1) != len(r2):
         raise Exception("The number of benchdnn runs do not match")
 
+    passed = True
+    results = {}
     for prb, time1 in r1.items():
         if prb not in r2:
             raise Exception(f"{prb} exists in {file1} but not {file2}")
 
+        results[prb] = (time1, r2[prb])
         if r2[prb] / time1 > 1 + tolerance:
-            raise Exception(f"{prb} has regressed by {round(r2[prb] / time1, 2)}x")
+            passed = False
 
-    print("Regression test passed")
+    print("%prb%,%-time(old)%,&-time(new)%")
+    for k, v in results.items():
+        print(f"{k},{v[0]},{v[1]}")
+
+    if passed:
+        print("Regression tests passed")
+    else:
+        raise Exception("Some regression tests did not pass")
 
 if __name__ == "__main__":
     compare_two_benchdnn(sys.argv[1], sys.argv[2])