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Diffstat (limited to 'scripts/lib/buildstats.py')
| -rw-r--r-- | scripts/lib/buildstats.py | 301 |
1 files changed, 301 insertions, 0 deletions
diff --git a/scripts/lib/buildstats.py b/scripts/lib/buildstats.py new file mode 100644 index 0000000000..9eb60b1c69 --- /dev/null +++ b/scripts/lib/buildstats.py @@ -0,0 +1,301 @@ +# +# Copyright (c) 2017, Intel Corporation. +# +# This program is free software; you can redistribute it and/or modify it +# under the terms and conditions of the GNU General Public License, +# version 2, as published by the Free Software Foundation. +# +# This program is distributed in the hope it will be useful, but WITHOUT +# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or +# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for +# more details. +# +"""Functionality for analyzing buildstats""" +import json +import logging +import os +import re +from collections import namedtuple +from statistics import mean + + +log = logging.getLogger() + + +taskdiff_fields = ('pkg', 'pkg_op', 'task', 'task_op', 'value1', 'value2', + 'absdiff', 'reldiff') +TaskDiff = namedtuple('TaskDiff', ' '.join(taskdiff_fields)) + + +class BSError(Exception): + """Error handling of buildstats""" + pass + + +class BSTask(dict): + def __init__(self, *args, **kwargs): + self['start_time'] = None + self['elapsed_time'] = None + self['status'] = None + self['iostat'] = {} + self['rusage'] = {} + self['child_rusage'] = {} + super(BSTask, self).__init__(*args, **kwargs) + + @property + def cputime(self): + """Sum of user and system time taken by the task""" + rusage = self['rusage']['ru_stime'] + self['rusage']['ru_utime'] + if self['child_rusage']: + # Child rusage may have been optimized out + return rusage + self['child_rusage']['ru_stime'] + self['child_rusage']['ru_utime'] + else: + return rusage + + @property + def walltime(self): + """Elapsed wall clock time""" + return self['elapsed_time'] + + @property + def read_bytes(self): + """Bytes read from the block layer""" + return self['iostat']['read_bytes'] + + @property + def write_bytes(self): + """Bytes written to the block layer""" + return self['iostat']['write_bytes'] + + @property + def read_ops(self): + """Number of read operations on the block layer""" + if self['child_rusage']: + # Child rusage may have been optimized out + return self['rusage']['ru_inblock'] + self['child_rusage']['ru_inblock'] + else: + return self['rusage']['ru_inblock'] + + @property + def write_ops(self): + """Number of write operations on the block layer""" + if self['child_rusage']: + # Child rusage may have been optimized out + return self['rusage']['ru_oublock'] + self['child_rusage']['ru_oublock'] + else: + return self['rusage']['ru_oublock'] + + @classmethod + def from_file(cls, buildstat_file): + """Read buildstat text file""" + bs_task = cls() + log.debug("Reading task buildstats from %s", buildstat_file) + end_time = None + with open(buildstat_file) as fobj: + for line in fobj.readlines(): + key, val = line.split(':', 1) + val = val.strip() + if key == 'Started': + start_time = float(val) + bs_task['start_time'] = start_time + elif key == 'Ended': + end_time = float(val) + elif key.startswith('IO '): + split = key.split() + bs_task['iostat'][split[1]] = int(val) + elif key.find('rusage') >= 0: + split = key.split() + ru_key = split[-1] + if ru_key in ('ru_stime', 'ru_utime'): + val = float(val) + else: + val = int(val) + ru_type = 'rusage' if split[0] == 'rusage' else \ + 'child_rusage' + bs_task[ru_type][ru_key] = val + elif key == 'Status': + bs_task['status'] = val + if end_time is not None and start_time is not None: + bs_task['elapsed_time'] = end_time - start_time + else: + raise BSError("{} looks like a invalid buildstats file".format(buildstat_file)) + return bs_task + + +class BSTaskAggregate(object): + """Class representing multiple runs of the same task""" + properties = ('cputime', 'walltime', 'read_bytes', 'write_bytes', + 'read_ops', 'write_ops') + + def __init__(self, tasks=None): + self._tasks = tasks or [] + self._properties = {} + + def __getattr__(self, name): + if name in self.properties: + if name not in self._properties: + # Calculate properties on demand only. We only provide mean + # value, so far + self._properties[name] = mean([getattr(t, name) for t in self._tasks]) + return self._properties[name] + else: + raise AttributeError("'BSTaskAggregate' has no attribute '{}'".format(name)) + + def append(self, task): + """Append new task""" + # Reset pre-calculated properties + assert isinstance(task, BSTask), "Type is '{}' instead of 'BSTask'".format(type(task)) + self._properties = {} + self._tasks.append(task) + + +class BSRecipe(object): + """Class representing buildstats of one recipe""" + def __init__(self, name, epoch, version, revision): + self.name = name + self.epoch = epoch + self.version = version + self.revision = revision + if epoch is None: + self.nevr = "{}-{}-{}".format(name, version, revision) + else: + self.nevr = "{}-{}_{}-{}".format(name, epoch, version, revision) + self.tasks = {} + + def aggregate(self, bsrecipe): + """Aggregate data of another recipe buildstats""" + if self.nevr != bsrecipe.nevr: + raise ValueError("Refusing to aggregate buildstats, recipe version " + "differs: {} vs. {}".format(self.nevr, bsrecipe.nevr)) + if set(self.tasks.keys()) != set(bsrecipe.tasks.keys()): + raise ValueError("Refusing to aggregate buildstats, set of tasks " + "in {} differ".format(self.name)) + + for taskname, taskdata in bsrecipe.tasks.items(): + if not isinstance(self.tasks[taskname], BSTaskAggregate): + self.tasks[taskname] = BSTaskAggregate([self.tasks[taskname]]) + self.tasks[taskname].append(taskdata) + + +class BuildStats(dict): + """Class representing buildstats of one build""" + + @classmethod + def from_json(cls, bs_json): + """Create new BuildStats object from JSON object""" + buildstats = cls() + for recipe in bs_json: + if recipe['name'] in buildstats: + raise BSError("Cannot handle multiple versions of the same " + "package ({})".format(recipe['name'])) + bsrecipe = BSRecipe(recipe['name'], recipe['epoch'], + recipe['version'], recipe['revision']) + for task, data in recipe['tasks'].items(): + bsrecipe.tasks[task] = BSTask(data) + + buildstats[recipe['name']] = bsrecipe + + return buildstats + + @staticmethod + def from_file_json(path): + """Load buildstats from a JSON file""" + with open(path) as fobj: + bs_json = json.load(fobj) + return BuildStats.from_json(bs_json) + + + @staticmethod + def split_nevr(nevr): + """Split name and version information from recipe "nevr" string""" + n_e_v, revision = nevr.rsplit('-', 1) + match = re.match(r'^(?P<name>\S+)-((?P<epoch>[0-9]{1,5})_)?(?P<version>[0-9]\S*)$', + n_e_v) + if not match: + # If we're not able to parse a version starting with a number, just + # take the part after last dash + match = re.match(r'^(?P<name>\S+)-((?P<epoch>[0-9]{1,5})_)?(?P<version>[^-]+)$', + n_e_v) + name = match.group('name') + version = match.group('version') + epoch = match.group('epoch') + return name, epoch, version, revision + + @classmethod + def from_dir(cls, path): + """Load buildstats from a buildstats directory""" + if not os.path.isfile(os.path.join(path, 'build_stats')): + raise BSError("{} does not look like a buildstats directory".format(path)) + + log.debug("Reading buildstats directory %s", path) + + buildstats = cls() + subdirs = os.listdir(path) + for dirname in subdirs: + recipe_dir = os.path.join(path, dirname) + if not os.path.isdir(recipe_dir): + continue + name, epoch, version, revision = cls.split_nevr(dirname) + bsrecipe = BSRecipe(name, epoch, version, revision) + for task in os.listdir(recipe_dir): + bsrecipe.tasks[task] = BSTask.from_file( + os.path.join(recipe_dir, task)) + if name in buildstats: + raise BSError("Cannot handle multiple versions of the same " + "package ({})".format(name)) + buildstats[name] = bsrecipe + + return buildstats + + def aggregate(self, buildstats): + """Aggregate other buildstats into this""" + if set(self.keys()) != set(buildstats.keys()): + raise ValueError("Refusing to aggregate buildstats, set of " + "recipes is different") + for pkg, data in buildstats.items(): + self[pkg].aggregate(data) + + +def diff_buildstats(bs1, bs2, stat_attr, min_val=None, min_absdiff=None): + """Compare the tasks of two buildstats""" + tasks_diff = [] + pkgs = set(bs1.keys()).union(set(bs2.keys())) + for pkg in pkgs: + tasks1 = bs1[pkg].tasks if pkg in bs1 else {} + tasks2 = bs2[pkg].tasks if pkg in bs2 else {} + if not tasks1: + pkg_op = '+' + elif not tasks2: + pkg_op = '-' + else: + pkg_op = ' ' + + for task in set(tasks1.keys()).union(set(tasks2.keys())): + task_op = ' ' + if task in tasks1: + val1 = getattr(bs1[pkg].tasks[task], stat_attr) + else: + task_op = '+' + val1 = 0 + if task in tasks2: + val2 = getattr(bs2[pkg].tasks[task], stat_attr) + else: + val2 = 0 + task_op = '-' + + if val1 == 0: + reldiff = float('inf') + else: + reldiff = 100 * (val2 - val1) / val1 + + if min_val and max(val1, val2) < min_val: + log.debug("Filtering out %s:%s (%s)", pkg, task, + max(val1, val2)) + continue + if min_absdiff and abs(val2 - val1) < min_absdiff: + log.debug("Filtering out %s:%s (difference of %s)", pkg, task, + val2-val1) + continue + tasks_diff.append(TaskDiff(pkg, pkg_op, task, task_op, val1, val2, + val2-val1, reldiff)) + return tasks_diff |