Trending: New sensitive detection

This enables PAL to consider burst size and stdev
when detecting anomalies.

Currently added as a separate presentation_new directory,
so the previous detection is still available by default.

TODO: If the state with two detections persists for some time,
create a script for generating presentation_new/
(from presentation/) to simplify maintenance.

Change-Id: Ic118aaf5ff036bf244c5820c86fa3766547fa938
Signed-off-by: Vratko Polak <vrpolak@cisco.com>

1 files changed, 317 insertions, 0 deletions

diff --git a/resources/tools/presentation_new/utils.py b/resources/tools/presentation_new/utils.py
new file mode 100644
index 0000000000..51bb1d0305
--- /dev/null
+++ b/resources/tools/presentation_new/utils.py
@@ -0,0 +1,317 @@
+# Copyright (c) 2018 Cisco and/or its affiliates.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""General purpose utilities.
+"""
+
+import multiprocessing
+import subprocess
+import numpy as np
+import logging
+import csv
+import prettytable
+
+from os import walk, makedirs, environ
+from os.path import join, isdir
+from shutil import move, Error
+from math import sqrt
+
+from errors import PresentationError
+from jumpavg.BitCountingClassifier import BitCountingClassifier
+
+
+def mean(items):
+    """Calculate mean value from the items.
+
+    :param items: Mean value is calculated from these items.
+    :type items: list
+    :returns: MEan value.
+    :rtype: float
+    """
+
+    return float(sum(items)) / len(items)
+
+
+def stdev(items):
+    """Calculate stdev from the items.
+
+    :param items: Stdev is calculated from these items.
+    :type items: list
+    :returns: Stdev.
+    :rtype: float
+    """
+
+    avg = mean(items)
+    variance = [(x - avg) ** 2 for x in items]
+    stddev = sqrt(mean(variance))
+    return stddev
+
+
+def relative_change(nr1, nr2):
+    """Compute relative change of two values.
+
+    :param nr1: The first number.
+    :param nr2: The second number.
+    :type nr1: float
+    :type nr2: float
+    :returns: Relative change of nr1.
+    :rtype: float
+    """
+
+    return float(((nr2 - nr1) / nr1) * 100)
+
+
+def get_files(path, extension=None, full_path=True):
+    """Generates the list of files to process.
+
+    :param path: Path to files.
+    :param extension: Extension of files to process. If it is the empty string,
+        all files will be processed.
+    :param full_path: If True, the files with full path are generated.
+    :type path: str
+    :type extension: str
+    :type full_path: bool
+    :returns: List of files to process.
+    :rtype: list
+    """
+
+    file_list = list()
+    for root, _, files in walk(path):
+        for filename in files:
+            if extension:
+                if filename.endswith(extension):
+                    if full_path:
+                        file_list.append(join(root, filename))
+                    else:
+                        file_list.append(filename)
+            else:
+                file_list.append(join(root, filename))
+
+    return file_list
+
+
+def get_rst_title_char(level):
+    """Return character used for the given title level in rst files.
+
+    :param level: Level of the title.
+    :type: int
+    :returns: Character used for the given title level in rst files.
+    :rtype: str
+    """
+    chars = ('=', '-', '`', "'", '.', '~', '*', '+', '^')
+    if level < len(chars):
+        return chars[level]
+    else:
+        return chars[-1]
+
+
+def execute_command(cmd):
+    """Execute the command in a subprocess and log the stdout and stderr.
+
+    :param cmd: Command to execute.
+    :type cmd: str
+    :returns: Return code of the executed command, stdout and stderr.
+    :rtype: tuple(int, str, str)
+    """
+
+    env = environ.copy()
+    proc = subprocess.Popen(
+        [cmd],
+        stdout=subprocess.PIPE,
+        stderr=subprocess.PIPE,
+        shell=True,
+        env=env)
+
+    stdout, stderr = proc.communicate()
+
+    if stdout:
+        logging.info(stdout)
+    if stderr:
+        logging.info(stderr)
+
+    if proc.returncode != 0:
+        logging.error("    Command execution failed.")
+    return proc.returncode, stdout, stderr
+
+
+def get_last_successful_build_number(jenkins_url, job_name):
+    """Get the number of the last successful build of the given job.
+
+    :param jenkins_url: Jenkins URL.
+    :param job_name: Job name.
+    :type jenkins_url: str
+    :type job_name: str
+    :returns: The build number as a string.
+    :rtype: str
+    """
+
+    url = "{}/{}/lastSuccessfulBuild/buildNumber".format(jenkins_url, job_name)
+    cmd = "wget -qO- {url}".format(url=url)
+
+    return execute_command(cmd)
+
+
+def get_last_completed_build_number(jenkins_url, job_name):
+    """Get the number of the last completed build of the given job.
+
+    :param jenkins_url: Jenkins URL.
+    :param job_name: Job name.
+    :type jenkins_url: str
+    :type job_name: str
+    :returns: The build number as a string.
+    :rtype: str
+    """
+
+    url = "{}/{}/lastCompletedBuild/buildNumber".format(jenkins_url, job_name)
+    cmd = "wget -qO- {url}".format(url=url)
+
+    return execute_command(cmd)
+
+
+def archive_input_data(spec):
+    """Archive the report.
+
+    :param spec: Specification read from the specification file.
+    :type spec: Specification
+    :raises PresentationError: If it is not possible to archive the input data.
+    """
+
+    logging.info("    Archiving the input data files ...")
+
+    extension = spec.input["file-format"]
+    data_files = get_files(spec.environment["paths"]["DIR[WORKING,DATA]"],
+                           extension=extension)
+    dst = spec.environment["paths"]["DIR[STATIC,ARCH]"]
+    logging.info("      Destination: {0}".format(dst))
+
+    try:
+        if not isdir(dst):
+            makedirs(dst)
+
+        for data_file in data_files:
+            logging.info("      Moving the file: {0} ...".format(data_file))
+            move(data_file, dst)
+
+    except (Error, OSError) as err:
+        raise PresentationError("Not possible to archive the input data.",
+                                str(err))
+
+    logging.info("    Done.")
+
+
+def classify_anomalies(data):
+    """Process the data and return anomalies and trending values.
+
+    Gather data into groups with average as trend value.
+    Decorate values within groups to be normal,
+    the first value of changed average as a regression, or a progression.
+
+    :param data: Full data set with unavailable samples replaced by nan.
+    :type data: OrderedDict
+    :returns: Classification and trend values
+    :rtype: 2-tuple, list of strings and list of floats
+    """
+    # Nan mean something went wrong.
+    # Use 0.0 to cause that being reported as a severe regression.
+    bare_data = [0.0 if np.isnan(sample.avg) else sample
+                 for _, sample in data.iteritems()]
+    # TODO: Put analogous iterator into jumpavg library.
+    groups = BitCountingClassifier().classify(bare_data)
+    groups.reverse()  # Just to use .pop() for FIFO.
+    classification = []
+    avgs = []
+    active_group = None
+    values_left = 0
+    avg = 0.0
+    for _, sample in data.iteritems():
+        if np.isnan(sample.avg):
+            classification.append("outlier")
+            avgs.append(sample.avg)
+            continue
+        if values_left < 1 or active_group is None:
+            values_left = 0
+            while values_left < 1:  # Ignore empty groups (should not happen).
+                active_group = groups.pop()
+                values_left = len(active_group.values)
+            avg = active_group.metadata.avg
+            classification.append(active_group.metadata.classification)
+            avgs.append(avg)
+            values_left -= 1
+            continue
+        classification.append("normal")
+        avgs.append(avg)
+        values_left -= 1
+    return classification, avgs
+
+
+def convert_csv_to_pretty_txt(csv_file, txt_file):
+    """Convert the given csv table to pretty text table.
+
+    :param csv_file: The path to the input csv file.
+    :param txt_file: The path to the output pretty text file.
+    :type csv_file: str
+    :type txt_file: str
+    """
+
+    txt_table = None
+    with open(csv_file, 'rb') as csv_file:
+        csv_content = csv.reader(csv_file, delimiter=',', quotechar='"')
+        for row in csv_content:
+            if txt_table is None:
+                txt_table = prettytable.PrettyTable(row)
+            else:
+                txt_table.add_row(row)
+        txt_table.align["Test case"] = "l"
+    if txt_table:
+        with open(txt_file, "w") as txt_file:
+            txt_file.write(str(txt_table))
+
+
+class Worker(multiprocessing.Process):
+    """Worker class used to process tasks in separate parallel processes.
+    """
+
+    def __init__(self, work_queue, data_queue, func):
+        """Initialization.
+
+        :param work_queue: Queue with items to process.
+        :param data_queue: Shared memory between processes. Queue which keeps
+            the result data. This data is then read by the main process and used
+            in further processing.
+        :param func: Function which is executed by the worker.
+        :type work_queue: multiprocessing.JoinableQueue
+        :type data_queue: multiprocessing.Manager().Queue()
+        :type func: Callable object
+        """
+        super(Worker, self).__init__()
+        self._work_queue = work_queue
+        self._data_queue = data_queue
+        self._func = func
+
+    def run(self):
+        """Method representing the process's activity.
+        """
+
+        while True:
+            try:
+                self.process(self._work_queue.get())
+            finally:
+                self._work_queue.task_done()
+
+    def process(self, item_to_process):
+        """Method executed by the runner.
+
+        :param item_to_process: Data to be processed by the function.
+        :type item_to_process: tuple
+        """
+        self._func(self.pid, self._data_queue, *item_to_process)