store objective in cache

Author: benvanwerkhoven

kernel_tuner/util.py

@@ -758,6 +758,7 @@ def process_cache(cache, kernel_options, tuning_options, runner):
         c["problem_size"] = kernel_options.problem_size if not callable(kernel_options.problem_size) else "callable"
         c["tune_params_keys"] = list(tuning_options.tune_params.keys())
         c["tune_params"] = tuning_options.tune_params
+        c["objective"] = tuning_options.objective
         c["cache"] = {}
 
         contents = json.dumps(c, cls=NpEncoder, indent="")[:-3]    # except the last "}\n}"

test/test_util_functions.py

@@ -550,7 +550,7 @@ def assert_open_cachefile_is_correctly_parsed(cache):
     delete_temp_file(cache)
 
     kernel_options = Options(kernel_name="test_kernel", problem_size=(1, 2))
-    tuning_options = Options(cache=cache, tune_params=Options(x=[1, 2, 3, 4]), simulation_mode=False)
+    tuning_options = Options(cache=cache, tune_params=Options(x=[1, 2, 3, 4]), simulation_mode=False, objective="time")
     runner = Options(dev=Options(name="test_device"), simulation_mode=False)
 
     try: