diff --git a/tools/run_tests/performance/scenario_config.py b/tools/run_tests/performance/scenario_config.py
index c63e0dbc3810eb0737bbdaa44535048774b16e6b..9366b2272acea83a102fa4959bad10fff3e76f50 100644
--- a/tools/run_tests/performance/scenario_config.py
+++ b/tools/run_tests/performance/scenario_config.py
@@ -109,7 +109,7 @@ class CXXLanguage:
           'server_config': {
             'server_type': 'ASYNC_GENERIC_SERVER',
             'security_params': secargs,
-            'core_limit': SINGLE_MACHINE_CORES/2,
+            'core_limit': 1,
             'async_server_threads': 1,
             'payload_config': EMPTY_GENERIC_PAYLOAD,
           },
@@ -126,7 +126,7 @@ class CXXLanguage:
             'security_params': secargs,
             'outstanding_rpcs_per_channel': DEEP,
             'client_channels': WIDE,
-            'async_client_threads': 1,
+            'async_client_threads': 0,
             'rpc_type': 'STREAMING',
             'load_params': {
               'closed_loop': {}
@@ -138,7 +138,7 @@ class CXXLanguage:
             'server_type': 'ASYNC_GENERIC_SERVER',
             'security_params': secargs,
             'core_limit': SINGLE_MACHINE_CORES/2,
-            'async_server_threads': 1,
+            'async_server_threads': 0,
             'payload_config': EMPTY_GENERIC_PAYLOAD,
           },
           'warmup_seconds': WARMUP_SECONDS,
@@ -154,7 +154,7 @@ class CXXLanguage:
             'security_params': secargs,
             'outstanding_rpcs_per_channel': DEEP,
             'client_channels': WIDE,
-            'async_client_threads': 1,
+            'async_client_threads': 0,
             'rpc_type': 'STREAMING',
             'load_params': {
               'closed_loop': {}
@@ -182,7 +182,7 @@ class CXXLanguage:
             'security_params': secargs,
             'outstanding_rpcs_per_channel': DEEP,
             'client_channels': WIDE,
-            'async_client_threads': 1,
+            'async_client_threads': 0,
             'rpc_type': 'STREAMING',
             'load_params': {
               'closed_loop': {}
@@ -194,7 +194,7 @@ class CXXLanguage:
             'server_type': 'ASYNC_SERVER',
             'security_params': secargs,
             'core_limit': SINGLE_MACHINE_CORES/2,
-            'async_server_threads': 1,
+            'async_server_threads': 0,
           },
           'warmup_seconds': WARMUP_SECONDS,
           'benchmark_seconds': BENCHMARK_SECONDS
@@ -207,9 +207,9 @@ class CXXLanguage:
           'client_config': {
             'client_type': 'ASYNC_CLIENT',
             'security_params': secargs,
-            'outstanding_rpcs_per_channel': 1,
+            'outstanding_rpcs_per_channel': DEEP,
             'client_channels': 1,
-            'async_client_threads': 1,
+            'async_client_threads': 0,
             'rpc_type': 'STREAMING',
             'load_params': {
               'closed_loop': {}
@@ -221,7 +221,7 @@ class CXXLanguage:
             'server_type': 'ASYNC_GENERIC_SERVER',
             'security_params': secargs,
             'core_limit': SINGLE_MACHINE_CORES/2,
-            'async_server_threads': 1,
+            'async_server_threads': 0,
             'payload_config': BIG_GENERIC_PAYLOAD,
           },
           'warmup_seconds': WARMUP_SECONDS,
@@ -248,7 +248,7 @@ class CXXLanguage:
           'server_config': {
             'server_type': 'ASYNC_SERVER',
             'security_params': secargs,
-            'core_limit': SINGLE_MACHINE_CORES/2,
+            'core_limit': 1,
             'async_server_threads': 1,
           },
           'warmup_seconds': WARMUP_SECONDS,
diff --git a/tools/run_tests/tests.json b/tools/run_tests/tests.json
index 21f36eb995751d9f60e2bae16a068c4ce04959ba..adb81b1e6aed869e0430b0005eea6c937f6be895 100644
--- a/tools/run_tests/tests.json
+++ b/tools/run_tests/tests.json
@@ -22035,7 +22035,7 @@
   {
     "args": [
       "--scenario_json", 
-      "'{\"name\": \"cpp_generic_async_streaming_ping_pong_secure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 4, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 1}'"
+      "'{\"name\": \"cpp_generic_async_streaming_ping_pong_secure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 1, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 1}'"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -22061,7 +22061,7 @@
   {
     "args": [
       "--scenario_json", 
-      "'{\"name\": \"cpp_generic_async_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 4, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}'"
+      "'{\"name\": \"cpp_generic_async_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 4, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}'"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -22087,7 +22087,7 @@
   {
     "args": [
       "--scenario_json", 
-      "'{\"name\": \"cpp_generic_async_streaming_qps_one_server_core_secure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 1, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}'"
+      "'{\"name\": \"cpp_generic_async_streaming_qps_one_server_core_secure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 1, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}'"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -22113,7 +22113,7 @@
   {
     "args": [
       "--scenario_json", 
-      "'{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 4, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}'"
+      "'{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_secure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 4, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}'"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -22139,7 +22139,7 @@
   {
     "args": [
       "--scenario_json", 
-      "'{\"name\": \"cpp_single_channel_throughput_secure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 4, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 65536, \"req_size\": 65536}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 65536, \"req_size\": 65536}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 1}'"
+      "'{\"name\": \"cpp_single_channel_throughput_secure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 4, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 65536, \"req_size\": 65536}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 65536, \"req_size\": 65536}}, \"client_channels\": 1, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 1}'"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -22165,7 +22165,7 @@
   {
     "args": [
       "--scenario_json", 
-      "'{\"name\": \"cpp_protobuf_async_ping_pong_secure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 4, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 1}'"
+      "'{\"name\": \"cpp_protobuf_async_ping_pong_secure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 1, \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": {\"use_test_ca\": true, \"server_host_override\": \"foo.test.google.fr\"}, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 1}'"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -22191,7 +22191,7 @@
   {
     "args": [
       "--scenario_json", 
-      "'{\"name\": \"cpp_generic_async_streaming_ping_pong_insecure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 4, \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 1}'"
+      "'{\"name\": \"cpp_generic_async_streaming_ping_pong_insecure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 1, \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 1}'"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -22217,7 +22217,7 @@
   {
     "args": [
       "--scenario_json", 
-      "'{\"name\": \"cpp_generic_async_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 4, \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}'"
+      "'{\"name\": \"cpp_generic_async_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 4, \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}'"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -22243,7 +22243,7 @@
   {
     "args": [
       "--scenario_json", 
-      "'{\"name\": \"cpp_generic_async_streaming_qps_one_server_core_insecure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 1, \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}'"
+      "'{\"name\": \"cpp_generic_async_streaming_qps_one_server_core_insecure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 1, \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}'"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -22269,7 +22269,7 @@
   {
     "args": [
       "--scenario_json", 
-      "'{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 4, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}'"
+      "'{\"name\": \"cpp_protobuf_async_streaming_qps_unconstrained_insecure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 4, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 64, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 0}'"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -22295,7 +22295,7 @@
   {
     "args": [
       "--scenario_json", 
-      "'{\"name\": \"cpp_single_channel_throughput_insecure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 4, \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 65536, \"req_size\": 65536}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 65536, \"req_size\": 65536}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 1}'"
+      "'{\"name\": \"cpp_single_channel_throughput_insecure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 0, \"core_limit\": 4, \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 65536, \"req_size\": 65536}}, \"server_type\": \"ASYNC_GENERIC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"bytebuf_params\": {\"resp_size\": 65536, \"req_size\": 65536}}, \"client_channels\": 1, \"async_client_threads\": 0, \"outstanding_rpcs_per_channel\": 100, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 1}'"
     ], 
     "boringssl": true, 
     "ci_platforms": [
@@ -22321,7 +22321,7 @@
   {
     "args": [
       "--scenario_json", 
-      "'{\"name\": \"cpp_protobuf_async_ping_pong_insecure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 4, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 1}'"
+      "'{\"name\": \"cpp_protobuf_async_ping_pong_insecure\", \"warmup_seconds\": 5, \"benchmark_seconds\": 30, \"num_servers\": 1, \"server_config\": {\"async_server_threads\": 1, \"core_limit\": 1, \"security_params\": null, \"server_type\": \"ASYNC_SERVER\"}, \"client_config\": {\"client_type\": \"ASYNC_CLIENT\", \"security_params\": null, \"payload_config\": {\"simple_params\": {\"resp_size\": 0, \"req_size\": 0}}, \"client_channels\": 1, \"async_client_threads\": 1, \"outstanding_rpcs_per_channel\": 1, \"rpc_type\": \"STREAMING\", \"load_params\": {\"closed_loop\": {}}, \"histogram_params\": {\"max_possible\": 60000000000.0, \"resolution\": 0.01}}, \"num_clients\": 1}'"
     ], 
     "boringssl": true, 
     "ci_platforms": [