Made the database script properly handle multiple entries for a single device

scripts/database/database/clblast.py

@@ -99,6 +99,36 @@ def print_as_name(name):
     return "Name{\"%-50s\"}" % name.strip()[:STRING_LENGTH]
 
 
+def get_kernel_database_results(kernel_database):
+    """Retrieves the best result from a group of results. Asserts for valid data"""
+    assert len(kernel_database) >= 1
+
+    all_results = [item["results"] for item in kernel_database]
+
+    best_results = all_results[0]
+    for results in all_results:
+
+        # Debugging in case of unexpected results
+        length_assumption = (len(results) == 1)
+        params_assumption = (sorted(results[0]["parameters"]) == sorted(best_results[0]["parameters"]))
+        if not length_assumption or not params_assumption:
+            print("[database] ERROR: Found %d kernel databases, expected 1" % len(kernel_database))
+            all_keys = sorted([key for item in kernel_database for key in item.keys()])
+            missing_keys = set([x for x in all_keys if all_keys.count(x) != len(kernel_database)])
+            print("[database] All keys in databases: %s" % str(set(all_keys)))
+            print("[database] Missing keys in one or more databases: %s" % str(missing_keys))
+            for index, item in enumerate(kernel_database):
+                print("[database] %d:" % index)
+                print(item)
+        assert length_assumption
+        assert params_assumption
+
+        if results[0]["time"] < best_results[0]["time"]:
+            best_results = results
+
+    return best_results
+
+
 def print_cpp_database(database, output_dir):
     """Outputs the database as C++ code"""
 
@@ -173,8 +203,7 @@ def print_cpp_database(database, output_dir):
                                 kernels = sorted(set([s["kernel"] for s in device_database]))
                                 for kernel in kernels:
                                     kernel_database = [s for s in device_database if s["kernel"] == kernel]
-                                    assert len(kernel_database) == 1
-                                    results = kernel_database[0]["results"]
+                                    results = get_kernel_database_results(kernel_database)
 
                                     assert len(results) == 1
                                     new_parameters = results[0]["parameters"]