grpc/tools/run_tests/performance/scenario_config.py

# Copyright 2016, Google Inc.
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#
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# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
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# distribution.
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# 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
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# performance scenario configuration for various languages

import math

WARMUP_SECONDS=5
JAVA_WARMUP_SECONDS=15  # Java needs more warmup time for JIT to kick in.
BENCHMARK_SECONDS=30

SMOKETEST='smoketest'
SCALABLE='scalable'
SWEEP='sweep'
DEFAULT_CATEGORIES=[SCALABLE, SMOKETEST]

SECURE_SECARGS = {'use_test_ca': True,
                  'server_host_override': 'foo.test.google.fr'}

HISTOGRAM_PARAMS = {
  'resolution': 0.01,
  'max_possible': 60e9,
}

EMPTY_GENERIC_PAYLOAD = {
  'bytebuf_params': {
    'req_size': 0,
    'resp_size': 0,
  }
}
EMPTY_PROTO_PAYLOAD = {
  'simple_params': {
    'req_size': 0,
    'resp_size': 0,
  }
}
BIG_GENERIC_PAYLOAD = {
  'bytebuf_params': {
    'req_size': 65536,
    'resp_size': 65536,
  }
}

# target number of RPCs outstanding on across all client channels in
# non-ping-pong tests (since we can only specify per-channel numbers, the
# actual target will be slightly higher)
OUTSTANDING_REQUESTS={
    'async': 6400,
    'sync': 1000
}

# wide is the number of client channels in multi-channel tests (1 otherwise)
WIDE=64


def _get_secargs(is_secure):
  if is_secure:
    return SECURE_SECARGS
  else:
    return None


def remove_nonproto_fields(scenario):
  """Remove special-purpose that contains some extra info about the scenario
  but don't belong to the ScenarioConfig protobuf message"""
  scenario.pop('CATEGORIES', None)
  scenario.pop('CLIENT_LANGUAGE', None)
  scenario.pop('SERVER_LANGUAGE', None)
  return scenario


def geometric_progression(start, stop, step):
  n = start
  while n < stop:
    yield int(round(n))
    n *= step


def _ping_pong_scenario(name, rpc_type,
                        client_type, server_type,
                        secure=True,
                        use_generic_payload=False,
                        unconstrained_client=None,
                        client_language=None,
                        server_language=None,
                        server_core_limit=0,
                        async_server_threads=0,
                        warmup_seconds=WARMUP_SECONDS,
                        categories=DEFAULT_CATEGORIES,
                        channels=None,
                        outstanding=None):
  """Creates a basic ping pong scenario."""
  scenario = {
    'name': name,
    'num_servers': 1,
    'num_clients': 1,
    'client_config': {
      'client_type': client_type,
      'security_params': _get_secargs(secure),
      'outstanding_rpcs_per_channel': 1,
      'client_channels': 1,
      'async_client_threads': 1,
      'rpc_type': rpc_type,
      'load_params': {
        'closed_loop': {}
      },
      'histogram_params': HISTOGRAM_PARAMS,
    },
    'server_config': {
      'server_type': server_type,
      'security_params': _get_secargs(secure),
      'core_limit': server_core_limit,
      'async_server_threads': async_server_threads,
    },
    'warmup_seconds': warmup_seconds,
    'benchmark_seconds': BENCHMARK_SECONDS
  }
  if use_generic_payload:
    if server_type != 'ASYNC_GENERIC_SERVER':
      raise Exception('Use ASYNC_GENERIC_SERVER for generic payload.')
    scenario['client_config']['payload_config'] = EMPTY_GENERIC_PAYLOAD
    scenario['server_config']['payload_config'] = EMPTY_GENERIC_PAYLOAD
  else:
    # For proto payload, only the client should get the config.
    scenario['client_config']['payload_config'] = EMPTY_PROTO_PAYLOAD

  if unconstrained_client:
    outstanding_calls = outstanding if outstanding is not None else OUTSTANDING_REQUESTS[unconstrained_client]
    wide = channels if channels is not None else WIDE
    deep = int(math.ceil(1.0 * outstanding_calls / wide))

    scenario['num_clients'] = 0  # use as many client as available.
    scenario['client_config']['outstanding_rpcs_per_channel'] = deep
    scenario['client_config']['client_channels'] = wide
    scenario['client_config']['async_client_threads'] = 0
  else:
    scenario['client_config']['outstanding_rpcs_per_channel'] = 1
    scenario['client_config']['client_channels'] = 1
    scenario['client_config']['async_client_threads'] = 1

  if client_language:
    # the CLIENT_LANGUAGE field is recognized by run_performance_tests.py
    scenario['CLIENT_LANGUAGE'] = client_language
  if server_language:
    # the SERVER_LANGUAGE field is recognized by run_performance_tests.py
    scenario['SERVER_LANGUAGE'] = server_language
  if categories:
    scenario['CATEGORIES'] = categories
  return scenario


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(ctiller): add 70% load latency test
    for secure in [True, False]:
      secstr = 'secure' if secure else 'insecure'
      smoketest_categories = ([SMOKETEST] if secure else []) + [SCALABLE]

      yield _ping_pong_scenario(
          'cpp_generic_async_streaming_ping_pong_%s' % secstr,
          rpc_type='STREAMING',
          client_type='ASYNC_CLIENT',
          server_type='ASYNC_GENERIC_SERVER',
          use_generic_payload=True, server_core_limit=1, async_server_threads=1,
          secure=secure,
          categories=smoketest_categories)

      yield _ping_pong_scenario(
          'cpp_generic_async_streaming_qps_unconstrained_%s' % secstr,
          rpc_type='STREAMING',
          client_type='ASYNC_CLIENT',
          server_type='ASYNC_GENERIC_SERVER',
          unconstrained_client='async', use_generic_payload=True,
          secure=secure,
          categories=smoketest_categories+[SCALABLE])

      yield _ping_pong_scenario(
          'cpp_generic_async_streaming_qps_one_server_core_%s' % secstr,
          rpc_type='STREAMING',
          client_type='ASYNC_CLIENT',
          server_type='ASYNC_GENERIC_SERVER',
          unconstrained_client='async', use_generic_payload=True,
          server_core_limit=1, async_server_threads=1,
          secure=secure)

      yield _ping_pong_scenario(
          'cpp_protobuf_async_client_sync_server_unary_qps_unconstrained_%s' %
          (secstr),
          rpc_type='UNARY',
          client_type='ASYNC_CLIENT',
          server_type='SYNC_SERVER',
          unconstrained_client='async',
          secure=secure,
          categories=smoketest_categories + [SCALABLE])

      yield _ping_pong_scenario(
          'cpp_protobuf_async_client_sync_server_streaming_qps_unconstrained_%s' % secstr,
          rpc_type='STREAMING',
          client_type='ASYNC_CLIENT',
          server_type='SYNC_SERVER',
          unconstrained_client='async',
          secure=secure,
          categories=smoketest_categories+[SCALABLE])

      for rpc_type in ['unary', 'streaming']:
        for synchronicity in ['sync', 'async']:
          yield _ping_pong_scenario(
              'cpp_protobuf_%s_%s_ping_pong_%s' % (synchronicity, rpc_type, secstr),
              rpc_type=rpc_type.upper(),
              client_type='%s_CLIENT' % synchronicity.upper(),
              server_type='%s_SERVER' % synchronicity.upper(),
              server_core_limit=1, async_server_threads=1,
              secure=secure)

          yield _ping_pong_scenario(
              'cpp_protobuf_%s_%s_qps_unconstrained_%s' % (synchronicity, rpc_type, secstr),
              rpc_type=rpc_type.upper(),
              client_type='%s_CLIENT' % synchronicity.upper(),
              server_type='%s_SERVER' % synchronicity.upper(),
              unconstrained_client=synchronicity,
              secure=secure,
              categories=smoketest_categories+[SCALABLE])

          for channels in geometric_progression(1, 20000, math.sqrt(10)):
            for outstanding in geometric_progression(1, 200000, math.sqrt(10)):
                if synchronicity == 'sync' and outstanding > 1200: continue
                if outstanding < channels: continue
                yield _ping_pong_scenario(
                    'cpp_protobuf_%s_%s_qps_unconstrained_%s_%d_channels_%d_outstanding' % (synchronicity, rpc_type, secstr, channels, outstanding),
                    rpc_type=rpc_type.upper(),
                    client_type='%s_CLIENT' % synchronicity.upper(),
                    server_type='%s_SERVER' % synchronicity.upper(),
                    unconstrained_client=synchronicity, secure=secure,
                    categories=[SWEEP], channels=channels, outstanding=outstanding)

  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):
    yield _ping_pong_scenario(
        'csharp_generic_async_streaming_ping_pong', rpc_type='STREAMING',
        client_type='ASYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
        use_generic_payload=True,
        categories=[SMOKETEST, SCALABLE])

    yield _ping_pong_scenario(
        'csharp_protobuf_async_streaming_ping_pong', rpc_type='STREAMING',
        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER')

    yield _ping_pong_scenario(
        'csharp_protobuf_async_unary_ping_pong', rpc_type='UNARY',
        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
        categories=[SMOKETEST, SCALABLE])

    yield _ping_pong_scenario(
        'csharp_protobuf_sync_to_async_unary_ping_pong', rpc_type='UNARY',
        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER')

    yield _ping_pong_scenario(
        'csharp_protobuf_async_unary_qps_unconstrained', rpc_type='UNARY',
        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
        unconstrained_client='async',
        categories=[SMOKETEST,SCALABLE])

    yield _ping_pong_scenario(
        'csharp_protobuf_async_streaming_qps_unconstrained', rpc_type='STREAMING',
        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
        unconstrained_client='async',
        categories=[SCALABLE])

    yield _ping_pong_scenario(
        'csharp_to_cpp_protobuf_sync_unary_ping_pong', rpc_type='UNARY',
        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
        server_language='c++', server_core_limit=1, async_server_threads=1,
        categories=[SMOKETEST, SCALABLE])

    yield _ping_pong_scenario(
        'csharp_to_cpp_protobuf_async_streaming_ping_pong', rpc_type='STREAMING',
        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
        server_language='c++', server_core_limit=1, async_server_threads=1)

    yield _ping_pong_scenario(
        'csharp_to_cpp_protobuf_async_unary_qps_unconstrained', rpc_type='UNARY',
        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
        unconstrained_client='async', server_language='c++',
        categories=[SCALABLE])

    yield _ping_pong_scenario(
        'csharp_to_cpp_protobuf_sync_to_async_unary_qps_unconstrained', rpc_type='UNARY',
        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
        unconstrained_client='sync', server_language='c++',
        categories=[SCALABLE])

    yield _ping_pong_scenario(
        'cpp_to_csharp_protobuf_async_unary_qps_unconstrained', rpc_type='UNARY',
        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
        unconstrained_client='async', client_language='c++',
        categories=[SCALABLE])


  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): make this scenario work
    #yield _ping_pong_scenario(
    #    'node_generic_async_streaming_ping_pong', rpc_type='STREAMING',
    #    client_type='ASYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
    #    use_generic_payload=True)

    # TODO(jtattermusch): make this scenario work
    #yield _ping_pong_scenario(
    #    'node_protobuf_async_streaming_ping_pong', rpc_type='STREAMING',
    #    client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER')

    yield _ping_pong_scenario(
        'node_protobuf_unary_ping_pong', rpc_type='UNARY',
        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
        categories=[SCALABLE, SMOKETEST])

    yield _ping_pong_scenario(
        'cpp_to_node_unary_ping_pong', rpc_type='UNARY',
        client_type='ASYNC_CLIENT', server_type='async_server',
        client_language='c++')

    yield _ping_pong_scenario(
        'node_protobuf_async_unary_qps_unconstrained', rpc_type='UNARY',
        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
        unconstrained_client='async',
        categories=[SCALABLE, SMOKETEST])

    # TODO(jtattermusch): make this scenario work
    #yield _ping_pong_scenario(
    #    'node_protobuf_async_streaming_qps_unconstrained', rpc_type='STREAMING',
    #    client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
    #    unconstrained_client='async')

    # TODO(jtattermusch): make this scenario work
    #yield _ping_pong_scenario(
    #    'node_to_cpp_protobuf_async_unary_ping_pong', rpc_type='UNARY',
    #    client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
    #    server_language='c++', server_core_limit=1, async_server_threads=1)

    # TODO(jtattermusch): make this scenario work
    #yield _ping_pong_scenario(
    #    'node_to_cpp_protobuf_async_streaming_ping_pong', rpc_type='STREAMING',
    #    client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
    #    server_language='c++', server_core_limit=1, async_server_threads=1)

  def __str__(self):
    return 'node'

class PythonLanguage:

  def __init__(self):
    self.safename = 'python'

  def worker_cmdline(self):
    return ['tools/run_tests/performance/run_worker_python.sh']

  def worker_port_offset(self):
    return 500

  def scenarios(self):
    yield _ping_pong_scenario(
        'python_generic_sync_streaming_ping_pong', rpc_type='STREAMING',
        client_type='SYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
        use_generic_payload=True,
        categories=[SMOKETEST, SCALABLE])

    yield _ping_pong_scenario(
        'python_protobuf_sync_streaming_ping_pong', rpc_type='STREAMING',
        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER')

    yield _ping_pong_scenario(
        'python_protobuf_async_unary_ping_pong', rpc_type='UNARY',
        client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER')

    yield _ping_pong_scenario(
        'python_protobuf_sync_unary_ping_pong', rpc_type='UNARY',
        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
        categories=[SMOKETEST, SCALABLE])

    yield _ping_pong_scenario(
        'python_protobuf_sync_unary_qps_unconstrained', rpc_type='UNARY',
        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
        unconstrained_client='sync')

    yield _ping_pong_scenario(
        'python_protobuf_sync_streaming_qps_unconstrained', rpc_type='STREAMING',
        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
        unconstrained_client='sync')

    yield _ping_pong_scenario(
        'python_to_cpp_protobuf_sync_unary_ping_pong', rpc_type='UNARY',
        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
        server_language='c++', server_core_limit=1, async_server_threads=1,
        categories=[SMOKETEST, SCALABLE])

    yield _ping_pong_scenario(
        'python_to_cpp_protobuf_sync_streaming_ping_pong', rpc_type='STREAMING',
        client_type='SYNC_CLIENT', server_type='ASYNC_SERVER',
        server_language='c++', server_core_limit=1, async_server_threads=1)

  def __str__(self):
    return 'python'

class RubyLanguage:

  def __init__(self):
    pass
    self.safename = str(self)

  def worker_cmdline(self):
    return ['tools/run_tests/performance/run_worker_ruby.sh']

  def worker_port_offset(self):
    return 300

  def scenarios(self):
    yield _ping_pong_scenario(
        'ruby_protobuf_sync_streaming_ping_pong', rpc_type='STREAMING',
        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
        categories=[SMOKETEST, SCALABLE])

    yield _ping_pong_scenario(
        'ruby_protobuf_unary_ping_pong', rpc_type='UNARY',
        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
        categories=[SMOKETEST, SCALABLE])

    yield _ping_pong_scenario(
        'ruby_protobuf_sync_unary_qps_unconstrained', rpc_type='UNARY',
        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
        unconstrained_client='sync')

    yield _ping_pong_scenario(
        'ruby_protobuf_sync_streaming_qps_unconstrained', rpc_type='STREAMING',
        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
        unconstrained_client='sync')

    yield _ping_pong_scenario(
        'ruby_to_cpp_protobuf_sync_unary_ping_pong', rpc_type='UNARY',
        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
        server_language='c++', server_core_limit=1, async_server_threads=1)

    yield _ping_pong_scenario(
        'ruby_to_cpp_protobuf_sync_streaming_ping_pong', rpc_type='STREAMING',
        client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
        server_language='c++', server_core_limit=1, async_server_threads=1)

  def __str__(self):
    return 'ruby'


class JavaLanguage:

  def __init__(self):
    pass
    self.safename = str(self)

  def worker_cmdline(self):
    return ['tools/run_tests/performance/run_worker_java.sh']

  def worker_port_offset(self):
    return 400

  def scenarios(self):
    for secure in [True, False]:
      secstr = 'secure' if secure else 'insecure'
      smoketest_categories = ([SMOKETEST] if secure else []) + [SCALABLE]

      yield _ping_pong_scenario(
          'java_generic_async_streaming_ping_pong_%s' % secstr, rpc_type='STREAMING',
          client_type='ASYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
          use_generic_payload=True, async_server_threads=1,
          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS,
          categories=smoketest_categories)

      yield _ping_pong_scenario(
          'java_protobuf_async_streaming_ping_pong_%s' % secstr, rpc_type='STREAMING',
          client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
          async_server_threads=1,
          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS)

      yield _ping_pong_scenario(
          'java_protobuf_async_unary_ping_pong_%s' % secstr, rpc_type='UNARY',
          client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
          async_server_threads=1,
          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS,
          categories=smoketest_categories)

      yield _ping_pong_scenario(
          'java_protobuf_unary_ping_pong_%s' % secstr, rpc_type='UNARY',
          client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
          async_server_threads=1,
          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS)

      yield _ping_pong_scenario(
          'java_protobuf_async_unary_qps_unconstrained_%s' % secstr, rpc_type='UNARY',
          client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
          unconstrained_client='async',
          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS,
          categories=smoketest_categories+[SCALABLE])

      yield _ping_pong_scenario(
          'java_protobuf_async_streaming_qps_unconstrained_%s' % secstr, rpc_type='STREAMING',
          client_type='ASYNC_CLIENT', server_type='ASYNC_SERVER',
          unconstrained_client='async',
          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS,
          categories=[SCALABLE])

      yield _ping_pong_scenario(
          'java_generic_async_streaming_qps_unconstrained_%s' % secstr, rpc_type='STREAMING',
          client_type='ASYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
          unconstrained_client='async', use_generic_payload=True,
          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS,
          categories=[SCALABLE])

      yield _ping_pong_scenario(
          'java_generic_async_streaming_qps_one_server_core_%s' % secstr, rpc_type='STREAMING',
          client_type='ASYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
          unconstrained_client='async', use_generic_payload=True,
          async_server_threads=1,
          secure=secure, warmup_seconds=JAVA_WARMUP_SECONDS)

      # TODO(jtattermusch): add scenarios java vs C++

  def __str__(self):
    return 'java'


class GoLanguage:

  def __init__(self):
    pass
    self.safename = str(self)

  def worker_cmdline(self):
    return ['tools/run_tests/performance/run_worker_go.sh']

  def worker_port_offset(self):
    return 600

  def scenarios(self):
    for secure in [True, False]:
      secstr = 'secure' if secure else 'insecure'
      smoketest_categories = ([SMOKETEST] if secure else []) + [SCALABLE]

      # ASYNC_GENERIC_SERVER for Go actually uses a sync streaming server,
      # but that's mostly because of lack of better name of the enum value.
      yield _ping_pong_scenario(
          'go_generic_sync_streaming_ping_pong_%s' % secstr, rpc_type='STREAMING',
          client_type='SYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
          use_generic_payload=True, async_server_threads=1,
          secure=secure,
          categories=smoketest_categories)

      yield _ping_pong_scenario(
          'go_protobuf_sync_streaming_ping_pong_%s' % secstr, rpc_type='STREAMING',
          client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
          async_server_threads=1,
          secure=secure)

      yield _ping_pong_scenario(
          'go_protobuf_sync_unary_ping_pong_%s' % secstr, rpc_type='UNARY',
          client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
          async_server_threads=1,
          secure=secure,
          categories=smoketest_categories)

      # unconstrained_client='async' is intended (client uses goroutines)
      yield _ping_pong_scenario(
          'go_protobuf_sync_unary_qps_unconstrained_%s' % secstr, rpc_type='UNARY',
          client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
          unconstrained_client='async',
          secure=secure,
          categories=smoketest_categories+[SCALABLE])

      # unconstrained_client='async' is intended (client uses goroutines)
      yield _ping_pong_scenario(
          'go_protobuf_sync_streaming_qps_unconstrained_%s' % secstr, rpc_type='STREAMING',
          client_type='SYNC_CLIENT', server_type='SYNC_SERVER',
          unconstrained_client='async',
          secure=secure,
          categories=[SCALABLE])

      # unconstrained_client='async' is intended (client uses goroutines)
      # ASYNC_GENERIC_SERVER for Go actually uses a sync streaming server,
      # but that's mostly because of lack of better name of the enum value.
      yield _ping_pong_scenario(
          'go_generic_sync_streaming_qps_unconstrained_%s' % secstr, rpc_type='STREAMING',
          client_type='SYNC_CLIENT', server_type='ASYNC_GENERIC_SERVER',
          unconstrained_client='async', use_generic_payload=True,
          secure=secure,
          categories=[SCALABLE])

      # TODO(jtattermusch): add scenarios go vs C++

  def __str__(self):
    return 'go'


LANGUAGES = {
    'c++' : CXXLanguage(),
    'csharp' : CSharpLanguage(),
    'node' : NodeLanguage(),
    'ruby' : RubyLanguage(),
    'java' : JavaLanguage(),
    'python' : PythonLanguage(),
    'go' : GoLanguage(),
}