summaryrefslogtreecommitdiffstats
path: root/scripts/lib/buildstats.py
blob: f7db3eaf92e6ba65208e7d6411a2173f9eb4e459 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
#
# 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,OrderedDict
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.evr = "{}-{}".format(version, revision)
        else:
            self.evr = "{}_{}-{}".format(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)

    @property
    def nevr(self):
        return self.name + '-' + self.evr


class BuildStats(dict):
    """Class representing buildstats of one build"""

    @property
    def num_tasks(self):
        """Get number of tasks"""
        num = 0
        for recipe in self.values():
            num += len(recipe.tasks)
        return num

    @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: %s" % (set(self.keys()) ^ set(buildstats.keys())))
        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


class BSVerDiff(object):
    """Class representing recipe version differences between two buildstats"""
    def __init__(self, bs1, bs2):
        RecipeVerDiff = namedtuple('RecipeVerDiff', 'left right')

        recipes1 = set(bs1.keys())
        recipes2 = set(bs2.keys())

        self.new = dict([(r, bs2[r]) for r in sorted(recipes2 - recipes1)])
        self.dropped = dict([(r, bs1[r]) for r in sorted(recipes1 - recipes2)])
        self.echanged = {}
        self.vchanged = {}
        self.rchanged = {}
        self.unchanged = {}
        self.empty_diff = False

        common = recipes2.intersection(recipes1)
        if common:
            for recipe in common:
                rdiff = RecipeVerDiff(bs1[recipe], bs2[recipe])
                if bs1[recipe].epoch != bs2[recipe].epoch:
                    self.echanged[recipe] = rdiff
                elif bs1[recipe].version != bs2[recipe].version:
                    self.vchanged[recipe] = rdiff
                elif bs1[recipe].revision != bs2[recipe].revision:
                    self.rchanged[recipe] = rdiff
                else:
                    self.unchanged[recipe] = rdiff

        if len(recipes1) == len(recipes2) == len(self.unchanged):
            self.empty_diff = True

    def __bool__(self):
        return not self.empty_diff