# See the License for the specific language governing permissions and
# limitations under the License.
-"""Constants used in CSIT."""
+"""Constants used in CSIT.
+
+Here, "constant" means a value that keeps its value since initialization.
+However, the value does not need to be hardcoded here,
+some values are affected by environment variables.
+
+TODO: Review env and constant names, make them matching if possible.
+"""
+
+
+import os
+
+
+def get_str_from_env(env_var_names, default_value):
+ """Attempt to read string from environment variable, return that or default.
+
+ If environment variable exists, but is empty (and default is not),
+ empty string is returned.
+
+ Several environment variable names are examined, as CSIT currently supports
+ a mix of naming convensions.
+ Here "several" means there are hardcoded prefixes to try,
+ and env_var_names itself can be single name, or a list or a tuple of names.
+
+ :param env_var_names: Base names of environment variable to attempt to read.
+ :param default_value: Value to return if the env var does not exist.
+ :type env_var_names: str, or list of str, or tuple of str
+ :type default_value: str
+ :returns: The value read, or default value.
+ :rtype: str
+ """
+ prefixes = ("FDIO_CSIT_", "CSIT_", "")
+ if not isinstance(env_var_names, (list, tuple)):
+ env_var_names = [env_var_names]
+ for name in env_var_names:
+ for prefix in prefixes:
+ value = os.environ.get(prefix + name, None)
+ if value is not None:
+ return value
+ return default_value
+
+
+def get_int_from_env(env_var_names, default_value):
+ """Attempt to read int from environment variable, return that or default.
+
+ String value is read, default is returned also if conversion fails.
+
+ :param env_var_names: Base names of environment variable to attempt to read.
+ :param default_value: Value to return if read or conversion fails.
+ :type env_var_names: str, or list of str, or tuple of str
+ :type default_value: int
+ :returns: The value read, or default value.
+ :rtype: int
+ """
+ env_str = get_str_from_env(env_var_names, "")
+ try:
+ return int(env_str)
+ except ValueError:
+ return default_value
+
+
+def get_float_from_env(env_var_names, default_value):
+ """Attempt to read float from environment variable, return that or default.
+
+ String value is read, default is returned also if conversion fails.
+
+ :param env_var_names: Base names of environment variable to attempt to read.
+ :param default_value: Value to return if read or conversion fails.
+ :type env_var_names: str, or list of str, or tuple of str
+ :type default_value: float
+ :returns: The value read, or default value.
+ :rtype: float
+ """
+ env_str = get_str_from_env(env_var_names, "")
+ try:
+ return float(env_str)
+ except ValueError:
+ return default_value
+
+
+def get_pessimistic_bool_from_env(env_var_names):
+ """Attempt to read bool from environment variable, assume False by default.
+
+ Conversion is lenient and pessimistic, only few strings are considered true.
+
+ :param env_var_names: Base names of environment variable to attempt to read.
+ :type env_var_names: str, or list of str, or tuple of str
+ :returns: The value read, or False.
+ :rtype: bool
+ """
+ env_str = get_str_from_env(env_var_names, "").lower()
+ return True if env_str in ("true", "yes", "y", "1") else False
+
+
+def get_optimistic_bool_from_env(env_var_names):
+ """Attempt to read bool from environment variable, assume True by default.
+
+ Conversion is lenient and optimistic, only few strings are considered false.
+
+ :param env_var_names: Base names of environment variable to attempt to read.
+ :type env_var_names: str, or list of str, or tuple of str
+ :returns: The value read, or True.
+ :rtype: bool
+ """
+ env_str = get_str_from_env(env_var_names, "").lower()
+ return False if env_str in ("false", "no", "n", "0") else True
class Constants(object):
# Docker container arm SUT image
DOCKER_SUT_IMAGE_UBUNTU_ARM = 'snergster/csit-arm-sut:latest'
- # TRex install version
- TREX_INSTALL_VERSION = '2.54'
-
# TRex install directory
- TREX_INSTALL_DIR = '/opt/trex-core-2.54'
+ TREX_INSTALL_DIR = '/opt/trex-core-2.61'
# Honeycomb directory location at topology nodes:
REMOTE_HC_DIR = '/opt/honeycomb'
# Default path to VPP API socket.
SOCKSVR_PATH = "/run/vpp/api.sock"
+ # Number of trials to execute in MRR test.
+ PERF_TRIAL_MULTIPLICITY = get_int_from_env("PERF_TRIAL_MULTIPLICITY", 10)
+
+ # Duration of one trial in MRR test.
+ PERF_TRIAL_DURATION = get_float_from_env("PERF_TRIAL_DURATION", 1.0)
+
+ # UUID string of DUT1 /tmp volume created outside of the
+ # DUT1 docker in case of vpp-device test. ${EMPTY} value means that
+ # /tmp directory is inside the DUT1 docker.
+ DUT1_UUID = get_str_from_env("DUT1_UUID", "")
+
+ # Default path to VPP API Stats socket.
+ SOCKSTAT_PATH = "/run/vpp/stats.sock"
+
# Global "kill switch" for CRC checking during runtime.
- CRC_MISMATCH_FAILS_TEST = True
+ FAIL_ON_CRC_MISMATCH = get_optimistic_bool_from_env("FAIL_ON_CRC_MISMATCH")
# Mapping from NIC name to its bps limit.
# TODO: Implement logic to lower limits to TG NIC or software. Or PCI.
Code Review / csit.git / blobdiff