Adding more comments & fix the outstanding channel count

src/python/grpcio_tests/tests_aio/benchmark/benchmark_client.py

@@ -42,7 +42,10 @@ class BenchmarkClient(abc.ABC):
 
     def __init__(self, address: str, config: control_pb2.ClientConfig,
                  hist: histogram.Histogram):
+        # Disables underlying reuse of subchannels
         unique_option = (('iv', random.random()),)
+
+        # Parses the channel argument from config
         channel_args = tuple(
             (arg.name, arg.str_value) if arg.HasField('str_value') else (
                 arg.name, int(arg.int_value)) for arg in config.channel_args)

tools/run_tests/performance/scenario_config.py

@@ -829,7 +829,7 @@ class PythonAsyncIOLanguage:
         return 1200
 
     def scenarios(self):
-        for outstanding in [32, 64, 128, 256, 512]:
+        for outstanding in [64, 128, 256]:
             for channels in [1, 4]:
                 yield _ping_pong_scenario(
                     'python_asyncio_protobuf_async_unary_ping_pong_%dx%d_max' %
@@ -840,7 +840,7 @@ class PythonAsyncIOLanguage:
                     rpc_type='UNARY',
                     client_type='ASYNC_CLIENT',
                     server_type='ASYNC_SERVER',
-                    outstanding=outstanding,
+                    outstanding=outstanding * channels,
                     channels=channels,
                     unconstrained_client='async',
                     categories=[SCALABLE])