diff --git a/test/cpp/qps/json_run_localhost_scenarios.bzl b/test/cpp/qps/json_run_localhost_scenarios.bzl
index 543997f5b67..5caebb2244c 100644
--- a/test/cpp/qps/json_run_localhost_scenarios.bzl
+++ b/test/cpp/qps/json_run_localhost_scenarios.bzl
@@ -35,23 +35,23 @@ JSON_RUN_LOCALHOST_SCENARIOS = {
     "cpp_protobuf_async_client_sync_server_streaming_qps_unconstrained_secure": '\'{"scenarios": [{"name": "cpp_protobuf_async_client_sync_server_streaming_qps_unconstrained_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 10, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_unary_ping_pong_secure_1MB": '\'{"scenarios": [{"name": "cpp_protobuf_async_unary_ping_pong_secure_1MB", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}], "payload_config": {"simple_params": {"req_size": 1048576, "resp_size": 1048576}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_sync_unary_ping_pong_secure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_unary_ping_pong_secure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "SYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_sync_unary_qps_unconstrained_secure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_unary_qps_unconstrained_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_sync_unary_qps_unconstrained_secure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_unary_qps_unconstrained_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_unary_ping_pong_secure": '\'{"scenarios": [{"name": "cpp_protobuf_async_unary_ping_pong_secure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_async_unary_qps_unconstrained_secure": '\'{"scenarios": [{"name": "cpp_protobuf_async_unary_qps_unconstrained_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_async_unary_qps_unconstrained_secure": '\'{"scenarios": [{"name": "cpp_protobuf_async_unary_qps_unconstrained_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_sync_streaming_ping_pong_secure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_ping_pong_secure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "SYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_sync_streaming_qps_unconstrained_secure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_qps_unconstrained_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_sync_streaming_qps_unconstrained_secure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_qps_unconstrained_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_sync_streaming_qps_unconstrained_1mps_secure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_qps_unconstrained_1mps_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}, "messages_per_stream": 1}, "server_config": {"server_type": "SYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_sync_streaming_qps_unconstrained_10mps_secure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_qps_unconstrained_10mps_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}, "messages_per_stream": 10}, "server_config": {"server_type": "SYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_streaming_ping_pong_secure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_ping_pong_secure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_async_streaming_qps_unconstrained_secure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_qps_unconstrained_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_async_streaming_qps_unconstrained_secure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_qps_unconstrained_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_streaming_qps_unconstrained_1mps_secure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_qps_unconstrained_1mps_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}, "messages_per_stream": 1}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_streaming_qps_unconstrained_10mps_secure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_qps_unconstrained_10mps_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}, "messages_per_stream": 10}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_sync_streaming_from_client_ping_pong_secure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_client_ping_pong_secure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "SYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_sync_streaming_from_client_qps_unconstrained_secure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_client_qps_unconstrained_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_sync_streaming_from_client_qps_unconstrained_secure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_client_qps_unconstrained_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_streaming_from_client_ping_pong_secure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_from_client_ping_pong_secure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_async_streaming_from_client_qps_unconstrained_secure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_from_client_qps_unconstrained_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_async_streaming_from_client_qps_unconstrained_secure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_from_client_qps_unconstrained_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_sync_streaming_from_server_ping_pong_secure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_server_ping_pong_secure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "SYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING_FROM_SERVER", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_sync_streaming_from_server_qps_unconstrained_secure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_server_qps_unconstrained_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 4, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING_FROM_SERVER", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_sync_streaming_from_server_qps_unconstrained_secure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_server_qps_unconstrained_secure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 4, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING_FROM_SERVER", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_streaming_from_server_ping_pong_secure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_from_server_ping_pong_secure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING_FROM_SERVER", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": {"use_test_ca": true, "server_host_override": "foo.test.google.fr"}, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_generic_async_streaming_ping_pong_insecure": '\'{"scenarios": [{"name": "cpp_generic_async_streaming_ping_pong_insecure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}], "payload_config": {"bytebuf_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_GENERIC_SERVER", "security_params": null, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}], "payload_config": {"bytebuf_params": {"req_size": 0, "resp_size": 0}}}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_generic_async_streaming_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_generic_async_streaming_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"bytebuf_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_GENERIC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"bytebuf_params": {"req_size": 0, "resp_size": 0}}}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
@@ -71,23 +71,23 @@ JSON_RUN_LOCALHOST_SCENARIOS = {
     "cpp_protobuf_async_client_sync_server_streaming_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_client_sync_server_streaming_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 10, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_unary_ping_pong_insecure_1MB": '\'{"scenarios": [{"name": "cpp_protobuf_async_unary_ping_pong_insecure_1MB", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 1048576, "resp_size": 1048576}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_sync_unary_ping_pong_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_unary_ping_pong_insecure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_sync_unary_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_unary_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_sync_unary_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_unary_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_unary_ping_pong_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_unary_ping_pong_insecure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_async_unary_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_unary_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_async_unary_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_unary_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_sync_streaming_ping_pong_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_ping_pong_insecure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_sync_streaming_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_sync_streaming_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
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     "cpp_protobuf_sync_streaming_qps_unconstrained_10mps_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_qps_unconstrained_10mps_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}, "messages_per_stream": 10}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_streaming_ping_pong_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_ping_pong_insecure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_async_streaming_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_async_streaming_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_streaming_qps_unconstrained_1mps_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_qps_unconstrained_1mps_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}, "messages_per_stream": 1}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_streaming_qps_unconstrained_10mps_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_qps_unconstrained_10mps_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}, "messages_per_stream": 10}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_sync_streaming_from_client_ping_pong_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_client_ping_pong_insecure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_sync_streaming_from_client_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_client_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_sync_streaming_from_client_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_client_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_streaming_from_client_ping_pong_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_from_client_ping_pong_insecure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_async_streaming_from_client_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_from_client_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_async_streaming_from_client_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_from_client_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_sync_streaming_from_server_ping_pong_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_server_ping_pong_insecure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING_FROM_SERVER", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_sync_streaming_from_server_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_server_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 4, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING_FROM_SERVER", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_sync_streaming_from_server_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_server_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 4, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING_FROM_SERVER", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_streaming_from_server_ping_pong_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_from_server_ping_pong_insecure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING_FROM_SERVER", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 1, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_async_streaming_from_server_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_from_server_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 4, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING_FROM_SERVER", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_async_streaming_from_server_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_from_server_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 4, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING_FROM_SERVER", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
 }
diff --git a/test/cpp/qps/qps_json_driver_scenarios.bzl b/test/cpp/qps/qps_json_driver_scenarios.bzl
index 90fbf95e903..d8b6031805d 100644
--- a/test/cpp/qps/qps_json_driver_scenarios.bzl
+++ b/test/cpp/qps/qps_json_driver_scenarios.bzl
@@ -32,16 +32,16 @@ QPS_JSON_DRIVER_SCENARIOS = {
     "cpp_protobuf_async_client_unary_1channel_64wide_128Breq_8MBresp_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_client_unary_1channel_64wide_128Breq_8MBresp_insecure", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 128, "resp_size": 8388608}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_client_sync_server_streaming_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_client_sync_server_streaming_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 10, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_unary_ping_pong_insecure_1MB": '\'{"scenarios": [{"name": "cpp_protobuf_async_unary_ping_pong_insecure_1MB", "num_servers": 1, "num_clients": 1, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 1, "async_client_threads": 1, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 1048576, "resp_size": 1048576}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "latency"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_sync_unary_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_unary_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_async_unary_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_unary_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_sync_streaming_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_sync_unary_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_unary_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_async_unary_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_unary_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "UNARY", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_sync_streaming_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_sync_streaming_qps_unconstrained_1mps_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_qps_unconstrained_1mps_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}, "messages_per_stream": 1}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_sync_streaming_qps_unconstrained_10mps_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_qps_unconstrained_10mps_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}, "messages_per_stream": 10}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_async_streaming_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_async_streaming_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_streaming_qps_unconstrained_1mps_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_qps_unconstrained_1mps_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}, "messages_per_stream": 1}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
     "cpp_protobuf_async_streaming_qps_unconstrained_10mps_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_qps_unconstrained_10mps_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 0, "rpc_type": "STREAMING", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}, "messages_per_stream": 10}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 0, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_sync_streaming_from_client_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_client_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_async_streaming_from_client_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_from_client_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_sync_streaming_from_server_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_server_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 4, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING_FROM_SERVER", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
-    "cpp_protobuf_async_streaming_from_server_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_from_server_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 4, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 3, "rpc_type": "STREAMING_FROM_SERVER", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 3, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_sync_streaming_from_client_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_client_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_async_streaming_from_client_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_from_client_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 16, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING_FROM_CLIENT", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_sync_streaming_from_server_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_sync_streaming_from_server_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "SYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 1, "client_channels": 4, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING_FROM_SERVER", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "SYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
+    "cpp_protobuf_async_streaming_from_server_qps_unconstrained_insecure": '\'{"scenarios": [{"name": "cpp_protobuf_async_streaming_from_server_qps_unconstrained_insecure", "num_servers": 1, "num_clients": 0, "client_config": {"client_type": "ASYNC_CLIENT", "security_params": null, "outstanding_rpcs_per_channel": 100, "client_channels": 4, "async_client_threads": 0, "client_processes": 0, "threads_per_cq": 2, "rpc_type": "STREAMING_FROM_SERVER", "histogram_params": {"resolution": 0.01, "max_possible": 60000000000.0}, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}], "payload_config": {"simple_params": {"req_size": 0, "resp_size": 0}}, "load_params": {"closed_loop": {}}}, "server_config": {"server_type": "ASYNC_SERVER", "security_params": null, "async_server_threads": 0, "server_processes": 0, "threads_per_cq": 2, "channel_args": [{"name": "grpc.optimization_target", "str_value": "throughput"}, {"name": "grpc.minimal_stack", "int_value": 1}]}, "warmup_seconds": 0, "benchmark_seconds": 1}]}\'',
 }
diff --git a/tools/run_tests/performance/scenario_config.py b/tools/run_tests/performance/scenario_config.py
index 3030f22f690..210abc67723 100644
--- a/tools/run_tests/performance/scenario_config.py
+++ b/tools/run_tests/performance/scenario_config.py
@@ -566,8 +566,8 @@ class CXXLanguage(Language):
                         unconstrained_client=synchronicity,
                         secure=secure,
                         minimal_stack=not secure,
-                        server_threads_per_cq=3,
-                        client_threads_per_cq=3,
+                        server_threads_per_cq=2,
+                        client_threads_per_cq=2,
                         categories=inproc_categories + maybe_scalable)
 
                     # TODO(vjpai): Re-enable this test. It has a lot of timeouts