1 files changed, 19 insertions, 1 deletions
diff --git a/test/cpp/qps/gen_build_yaml.py b/test/cpp/qps/gen_build_yaml.py
index 6b3329b046..e8ad74f0f6 100755
--- a/test/cpp/qps/gen_build_yaml.py
+++ b/test/cpp/qps/gen_build_yaml.py
@@ -46,6 +46,24 @@ import performance.scenario_config as scenario_config
 def _scenario_json_string(scenario_json):
   return json.dumps(scenario_config.remove_nonproto_fields(scenario_json))
 
+def threads_of_type(scenario_json, path):
+  d = scenario_json
+  for el in path.split('/'):
+    if el not in d:
+      return 0
+    d = d[el]
+  return d
+
+def guess_cpu(scenario_json):
+  client = threads_of_type(scenario_json, 'client_config/async_client_threads')
+  server = threads_of_type(scenario_json, 'server_config/async_server_threads')
+  # make an arbitrary guess if set to auto-detect
+  # about the size of the jenkins instances we have for unit tests
+  if client == 0: client = 8
+  if server == 0: server = 8
+  return (scenario_json['num_clients'] * client +
+          scenario_json['num_servers'] * server)
+
 print yaml.dump({
   'tests': [
     {
@@ -59,7 +77,7 @@ print yaml.dump({
       'language': 'c++',
       'boringssl': True,
       'defaults': 'boringssl',
-      'cpu_cost': 1000.0,
+      'cpu_cost': guess_cpu(scenario_json),
       'exclude_configs': []
     }
     for scenario_json in scenario_config.CXXLanguage().scenarios()