Separate configuration from running logic for performance tests
diff --git a/tools/run_tests/performance/__init__.py b/tools/run_tests/performance/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/tools/run_tests/performance/__init__.py
diff --git a/tools/run_tests/performance/config.py b/tools/run_tests/performance/config.py
new file mode 100644
index 0000000..f95e531
--- /dev/null
+++ b/tools/run_tests/performance/config.py
@@ -0,0 +1,153 @@
+# Copyright 2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+# performance scenario configuration for various languages
+
+class CXXLanguage:
+
+  def __init__(self):
+    self.safename = 'cxx'
+
+  def worker_cmdline(self):
+    return ['bins/opt/qps_worker']
+
+  def worker_port_offset(self):
+    return 0
+
+  def scenarios(self):
+    # TODO(jtattermusch): add more scenarios
+    return {
+            # Scenario 1: generic async streaming ping-pong (contentionless latency)
+            'cpp_async_generic_streaming_ping_pong': [
+                '--rpc_type=STREAMING',
+                '--client_type=ASYNC_CLIENT',
+                '--server_type=ASYNC_GENERIC_SERVER',
+                '--outstanding_rpcs_per_channel=1',
+                '--client_channels=1',
+                '--bbuf_req_size=0',
+                '--bbuf_resp_size=0',
+                '--async_client_threads=1',
+                '--async_server_threads=1',
+                '--secure_test=true',
+                '--num_servers=1',
+                '--num_clients=1',
+                '--server_core_limit=0',
+                '--client_core_limit=0'],
+            # Scenario 5: Sync unary ping-pong with protobufs
+            'cpp_sync_unary_ping_pong_protobuf': [
+                '--rpc_type=UNARY',
+                '--client_type=SYNC_CLIENT',
+                '--server_type=SYNC_SERVER',
+                '--outstanding_rpcs_per_channel=1',
+                '--client_channels=1',
+                '--simple_req_size=0',
+                '--simple_resp_size=0',
+                '--secure_test=true',
+                '--num_servers=1',
+                '--num_clients=1',
+                '--server_core_limit=0',
+                '--client_core_limit=0']}
+
+  def __str__(self):
+    return 'c++'
+
+
+class CSharpLanguage:
+
+  def __init__(self):
+    self.safename = str(self)
+
+  def worker_cmdline(self):
+    return ['tools/run_tests/performance/run_worker_csharp.sh']
+
+  def worker_port_offset(self):
+    return 100
+
+  def scenarios(self):
+    # TODO(jtattermusch): add more scenarios
+    return {
+            # Scenario 1: generic async streaming ping-pong (contentionless latency)
+            'csharp_async_generic_streaming_ping_pong': [
+                '--rpc_type=STREAMING',
+                '--client_type=ASYNC_CLIENT',
+                '--server_type=ASYNC_GENERIC_SERVER',
+                '--outstanding_rpcs_per_channel=1',
+                '--client_channels=1',
+                '--bbuf_req_size=0',
+                '--bbuf_resp_size=0',
+                '--async_client_threads=1',
+                '--async_server_threads=1',
+                '--secure_test=true',
+                '--num_servers=1',
+                '--num_clients=1',
+                '--server_core_limit=0',
+                '--client_core_limit=0']}
+
+  def __str__(self):
+    return 'csharp'
+
+
+class NodeLanguage:
+
+  def __init__(self):
+    pass
+    self.safename = str(self)
+
+  def worker_cmdline(self):
+    return ['tools/run_tests/performance/run_worker_node.sh']
+
+  def worker_port_offset(self):
+    return 200
+
+  def scenarios(self):
+    # TODO(jtattermusch): add more scenarios
+    return {
+             'node_sync_unary_ping_pong_protobuf': [
+                '--rpc_type=UNARY',
+                '--client_type=ASYNC_CLIENT',
+                '--server_type=ASYNC_SERVER',
+                '--outstanding_rpcs_per_channel=1',
+                '--client_channels=1',
+                '--simple_req_size=0',
+                '--simple_resp_size=0',
+                '--secure_test=false',
+                '--num_servers=1',
+                '--num_clients=1',
+                '--server_core_limit=0',
+                '--client_core_limit=0']}
+
+  def __str__(self):
+    return 'node'
+
+
+LANGUAGES = {
+    'c++' : CXXLanguage(),
+    'csharp' : CSharpLanguage(),
+    'node' : NodeLanguage(),
+}
diff --git a/tools/run_tests/run_performance_tests.py b/tools/run_tests/run_performance_tests.py
index 0ab3d26..16b49a9 100755
--- a/tools/run_tests/run_performance_tests.py
+++ b/tools/run_tests/run_performance_tests.py
@@ -40,6 +40,7 @@
 import tempfile
 import time
 import uuid
+import performance.config as config
 
 
 _ROOT = os.path.abspath(os.path.join(os.path.dirname(sys.argv[0]), '../..'))
@@ -49,130 +50,6 @@
 _REMOTE_HOST_USERNAME = 'jenkins'
 
 
-class CXXLanguage:
-
-  def __init__(self):
-    self.safename = 'cxx'
-
-  def worker_cmdline(self):
-    return ['bins/opt/qps_worker']
-
-  def worker_port_offset(self):
-    return 0
-
-  def scenarios(self):
-    # TODO(jtattermusch): add more scenarios
-    return {
-            # Scenario 1: generic async streaming ping-pong (contentionless latency)
-            'cpp_async_generic_streaming_ping_pong': [
-                '--rpc_type=STREAMING',
-                '--client_type=ASYNC_CLIENT',
-                '--server_type=ASYNC_GENERIC_SERVER',
-                '--outstanding_rpcs_per_channel=1',
-                '--client_channels=1',
-                '--bbuf_req_size=0',
-                '--bbuf_resp_size=0',
-                '--async_client_threads=1',
-                '--async_server_threads=1',
-                '--secure_test=true',
-                '--num_servers=1',
-                '--num_clients=1',
-                '--server_core_limit=0',
-                '--client_core_limit=0'],
-            # Scenario 5: Sync unary ping-pong with protobufs
-            'cpp_sync_unary_ping_pong_protobuf': [
-                '--rpc_type=UNARY',
-                '--client_type=SYNC_CLIENT',
-                '--server_type=SYNC_SERVER',
-                '--outstanding_rpcs_per_channel=1',
-                '--client_channels=1',
-                '--simple_req_size=0',
-                '--simple_resp_size=0',
-                '--secure_test=true',
-                '--num_servers=1',
-                '--num_clients=1',
-                '--server_core_limit=0',
-                '--client_core_limit=0']}
-
-  def __str__(self):
-    return 'c++'
-
-
-class CSharpLanguage:
-
-  def __init__(self):
-    self.safename = str(self)
-
-  def worker_cmdline(self):
-    return ['tools/run_tests/performance/run_worker_csharp.sh']
-
-  def worker_port_offset(self):
-    return 100
-
-  def scenarios(self):
-    # TODO(jtattermusch): add more scenarios
-    return {
-            # Scenario 1: generic async streaming ping-pong (contentionless latency)
-            'csharp_async_generic_streaming_ping_pong': [
-                '--rpc_type=STREAMING',
-                '--client_type=ASYNC_CLIENT',
-                '--server_type=ASYNC_GENERIC_SERVER',
-                '--outstanding_rpcs_per_channel=1',
-                '--client_channels=1',
-                '--bbuf_req_size=0',
-                '--bbuf_resp_size=0',
-                '--async_client_threads=1',
-                '--async_server_threads=1',
-                '--secure_test=true',
-                '--num_servers=1',
-                '--num_clients=1',
-                '--server_core_limit=0',
-                '--client_core_limit=0']}
-
-  def __str__(self):
-    return 'csharp'
-
-
-class NodeLanguage:
-
-  def __init__(self):
-    pass
-    self.safename = str(self)
-
-  def worker_cmdline(self):
-    return ['tools/run_tests/performance/run_worker_node.sh']
-
-  def worker_port_offset(self):
-    return 200
-
-  def scenarios(self):
-    # TODO(jtattermusch): add more scenarios
-    return {
-             'node_sync_unary_ping_pong_protobuf': [
-                '--rpc_type=UNARY',
-                '--client_type=ASYNC_CLIENT',
-                '--server_type=ASYNC_SERVER',
-                '--outstanding_rpcs_per_channel=1',
-                '--client_channels=1',
-                '--simple_req_size=0',
-                '--simple_resp_size=0',
-                '--secure_test=false',
-                '--num_servers=1',
-                '--num_clients=1',
-                '--server_core_limit=0',
-                '--client_core_limit=0']}
-
-  def __str__(self):
-    return 'node'
-
-
-_LANGUAGES = {
-    'c++' : CXXLanguage(),
-    'csharp' : CSharpLanguage(),
-    'node' : NodeLanguage(),
-}
-
-
 class QpsWorkerJob:
   """Encapsulates a qps worker server job."""
 
@@ -272,7 +149,7 @@
     sys.exit(1)
 
 
-def build_on_remote_hosts(hosts, languages=_LANGUAGES.keys(), build_local=False):
+def build_on_remote_hosts(hosts, languages=config.LANGUAGES.keys(), build_local=False):
   """Builds performance worker on remote hosts (and maybe also locally)."""
   build_timeout = 15*60
   build_jobs = []
@@ -366,7 +243,7 @@
 
 argp = argparse.ArgumentParser(description='Run performance tests.')
 argp.add_argument('-l', '--language',
-                  choices=['all'] + sorted(_LANGUAGES.keys()),
+                  choices=['all'] + sorted(config.LANGUAGES.keys()),
                   nargs='+',
                   default=['all'],
                   help='Languages to benchmark.')
@@ -380,9 +257,9 @@
 
 args = argp.parse_args()
 
-languages = set(_LANGUAGES[l]
+languages = set(config.LANGUAGES[l]
                 for l in itertools.chain.from_iterable(
-                      _LANGUAGES.iterkeys() if x == 'all' else [x]
+                      config.LANGUAGES.iterkeys() if x == 'all' else [x]
                       for x in args.language))
 
 # Put together set of remote hosts where to run and build