[RFC,v2,4/4] dts: format docstrigs to google format
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Commit Message
WIP: only one module is reformatted to serve as a demonstration.
The google format is documented here [0].
[0]: https://google.github.io/styleguide/pyguide.html
Signed-off-by: Juraj Linkeš <juraj.linkes@pantheon.tech>
---
dts/framework/testbed_model/node.py | 152 +++++++++++++++++++---------
1 file changed, 103 insertions(+), 49 deletions(-)
@@ -3,8 +3,13 @@
# Copyright(c) 2022-2023 PANTHEON.tech s.r.o.
# Copyright(c) 2022-2023 University of New Hampshire
-"""
-A node is a generic host that DTS connects to and manages.
+"""Common functionality for node management.
+
+There's a base class, Node, that's supposed to be extended by other classes
+with functionality specific to that node type.
+The only part that can be used standalone is the Node.skip_setup static method,
+which is a decorator used to skip method execution
+if skip_setup is passed by the user on the cmdline or in an env variable.
"""
from typing import Any, Callable
@@ -26,10 +31,25 @@
class Node(object):
- """
- Basic class for node management. This class implements methods that
- manage a node, such as information gathering (of CPU/PCI/NIC) and
- environment setup.
+ """The base class for node management.
+
+ It shouldn't be instantiated, but rather extended.
+ It implements common methods to manage any node:
+
+ * connection to the node
+ * information gathering of CPU
+ * hugepages setup
+
+ Arguments:
+ node_config: The config from the input configuration file.
+
+ Attributes:
+ main_session: The primary OS-agnostic remote session used
+ to communicate with the node.
+ config: The configuration used to create the node.
+ name: The name of the node.
+ lcores: The list of logical cores that DTS can use on the node.
+ It's derived from logical cores present on the node and user configuration.
"""
main_session: OSSession
@@ -56,65 +76,89 @@ def __init__(self, node_config: NodeConfiguration):
self._logger.info(f"Created node: {self.name}")
def set_up_execution(self, execution_config: ExecutionConfiguration) -> None:
- """
- Perform the execution setup that will be done for each execution
- this node is part of.
+ """Execution setup steps.
+
+ Configure hugepages and call self._set_up_execution where
+ the rest of the configuration steps (if any) are implemented.
+
+ Args:
+ execution_config: The execution configuration according to which
+ the setup steps will be taken.
"""
self._setup_hugepages()
self._set_up_execution(execution_config)
def _set_up_execution(self, execution_config: ExecutionConfiguration) -> None:
- """
- This method exists to be optionally overwritten by derived classes and
- is not decorated so that the derived class doesn't have to use the decorator.
+ """Optional additional execution setup steps for derived classes.
+
+ Derived classes should overwrite this
+ if they want to add additional execution setup steps.
"""
def tear_down_execution(self) -> None:
- """
- Perform the execution teardown that will be done after each execution
- this node is part of concludes.
+ """Execution teardown steps.
+
+ There are currently no common execution teardown steps
+ common to all DTS node types.
"""
self._tear_down_execution()
def _tear_down_execution(self) -> None:
- """
- This method exists to be optionally overwritten by derived classes and
- is not decorated so that the derived class doesn't have to use the decorator.
+ """Optional additional execution teardown steps for derived classes.
+
+ Derived classes should overwrite this
+ if they want to add additional execution teardown steps.
"""
def set_up_build_target(
self, build_target_config: BuildTargetConfiguration
) -> None:
- """
- Perform the build target setup that will be done for each build target
- tested on this node.
+ """Build target setup steps.
+
+ There are currently no common build target setup steps
+ common to all DTS node types.
+
+ Args:
+ build_target_config: The build target configuration according to which
+ the setup steps will be taken.
"""
self._set_up_build_target(build_target_config)
def _set_up_build_target(
self, build_target_config: BuildTargetConfiguration
) -> None:
- """
- This method exists to be optionally overwritten by derived classes and
- is not decorated so that the derived class doesn't have to use the decorator.
+ """Optional additional build target setup steps for derived classes.
+
+ Derived classes should optionally overwrite this
+ if they want to add additional build target setup steps.
"""
def tear_down_build_target(self) -> None:
- """
- Perform the build target teardown that will be done after each build target
- tested on this node.
+ """Build target teardown steps.
+
+ There are currently no common build target teardown steps
+ common to all DTS node types.
"""
self._tear_down_build_target()
def _tear_down_build_target(self) -> None:
- """
- This method exists to be optionally overwritten by derived classes and
- is not decorated so that the derived class doesn't have to use the decorator.
+ """Optional additional build target teardown steps for derived classes.
+
+ Derived classes should overwrite this
+ if they want to add additional build target teardown steps.
"""
def create_session(self, name: str) -> OSSession:
- """
- Create and return a new OSSession tailored to the remote OS.
+ """Create and return a new OS-agnostic remote session.
+
+ The returned session won't be used by the object creating it.
+ Will be cleaned up automatically.
+
+ Args:
+ name: The name of the session.
+
+ Returns:
+ A new OS-agnostic remote session.
"""
session_name = f"{self.name} {name}"
connection = create_session(
@@ -130,14 +174,24 @@ def filter_lcores(
filter_specifier: LogicalCoreCount | LogicalCoreList,
ascending: bool = True,
) -> list[LogicalCore]:
- """
- Filter the LogicalCores found on the Node according to
- a LogicalCoreCount or a LogicalCoreList.
+ """Filter the node's logical cores that DTS can use.
- If ascending is True, use cores with the lowest numerical id first
- and continue in ascending order. If False, start with the highest
- id and continue in descending order. This ordering affects which
- sockets to consider first as well.
+ Logical cores that DTS can use are ones that are present on the node,
+ but filtered according to user config.
+ The filter_specifier will filter cores from those logical cores.
+
+ Args:
+ filter_specifier: Two different filters can be used, one that specifies
+ the number of logical cores per core, cores per socket and
+ the number of sockets,
+ the other that specifies a logical core list.
+ ascending: If True, use cores with the lowest numerical id first
+ and continue in ascending order. If False, start with the highest
+ id and continue in descending order. This ordering affects which
+ sockets to consider first as well.
+
+ Returns:
+ A list of logical cores.
"""
self._logger.debug(f"Filtering {filter_specifier} from {self.lcores}.")
return lcore_filter(
@@ -147,17 +201,14 @@ def filter_lcores(
).filter()
def _get_remote_cpus(self) -> None:
- """
- Scan CPUs in the remote OS and store a list of LogicalCores.
- """
+ """Scan CPUs in the remote OS and store a list of LogicalCores."""
self._logger.info("Getting CPU information.")
self.lcores = self.main_session.get_remote_cpus(self.config.use_first_core)
def _setup_hugepages(self):
- """
- Setup hugepages on the Node. Different architectures can supply different
- amounts of memory for hugepages and numa-based hugepage allocation may need
- to be considered.
+ """Setup hugepages on the Node.
+
+ Configure the hugepages only if they're specified in user configuration.
"""
if self.config.hugepages:
self.main_session.setup_hugepages(
@@ -165,9 +216,7 @@ def _setup_hugepages(self):
)
def close(self) -> None:
- """
- Close all connections and free other resources.
- """
+ """Close all connections and free other resources."""
if self.main_session:
self.main_session.close()
for session in self._other_sessions:
@@ -176,6 +225,11 @@ def close(self) -> None:
@staticmethod
def skip_setup(func: Callable[..., Any]) -> Callable[..., Any]:
+ """A decorator that skips the decorated function.
+
+ When used, the decorator executes an empty lambda function
+ instead of the decorated function.
+ """
if SETTINGS.skip_setup:
return lambda *args: None
else: