~bzr-pqm/bzr/bzr.dev

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
# Copyright (C) 2006 by Canonical Ltd
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that 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.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""Benchmark test suite for bzr."""

from bzrlib import (
    bzrdir,
    plugin,
    )
import bzrlib.branch
from bzrlib.tests.TestUtil import TestLoader
from bzrlib.tests.blackbox import ExternalBase


class Benchmark(ExternalBase):

    def make_kernel_like_tree(self, url=None, root='.',
                              link_working=False):
        """Setup a temporary tree roughly like a kernel tree.
        
        :param url: Creat the kernel like tree as a lightweight checkout
        of a new branch created at url.
        :param link_working: instead of creating a new copy of all files
            just hardlink the working tree. Tests must request this, because
            they must break links if they want to change the files
        """
        from bzrlib.benchmarks.tree_creator.kernel_like import (
            KernelLikeTreeCreator,
            )
        creator = KernelLikeTreeCreator(self, link_working=link_working,
                                        url=url)
        return creator.create(root=root)

    def make_kernel_like_added_tree(self, root='.',
                                    link_working=True,
                                    hot_cache=True):
        """Make a kernel like tree, with all files added

        :param root: Where to create the files
        :param link_working: Instead of copying all of the working tree
            files, just hardlink them to the cached files. Tests can unlink
            files that they will change.
        :param hot_cache: Run through the newly created tree and make sure
            the stat-cache is correct. The old way of creating a freshly
            added tree always had a hot cache.
        """
        from bzrlib.benchmarks.tree_creator.kernel_like import (
            KernelLikeAddedTreeCreator,
            )
        creator = KernelLikeAddedTreeCreator(self, link_working=link_working,
                                             hot_cache=hot_cache)
        return creator.create(root=root)

    def make_kernel_like_committed_tree(self, root='.',
                                    link_working=True,
                                    link_bzr=False,
                                    hot_cache=True):
        """Make a kernel like tree, with all files added and committed

        :param root: Where to create the files
        :param link_working: Instead of copying all of the working tree
            files, just hardlink them to the cached files. Tests can unlink
            files that they will change.
        :param link_bzr: Hardlink the .bzr directory. For readonly 
            operations this is safe, and shaves off a lot of setup time
        """
        from bzrlib.benchmarks.tree_creator.kernel_like import (
            KernelLikeCommittedTreeCreator,
            )
        creator = KernelLikeCommittedTreeCreator(self,
                                                 link_working=link_working,
                                                 link_bzr=link_bzr,
                                                 hot_cache=hot_cache)
        return creator.create(root=root)

    def make_kernel_like_inventory(self):
        """Create an inventory with the properties of a kernel-like tree

        This should be equivalent to a committed kernel like tree, not
        just a working tree.
        """
        from bzrlib.benchmarks.tree_creator.kernel_like import (
            KernelLikeInventoryCreator,
            )
        creator = KernelLikeInventoryCreator(self)
        return creator.create()

    def make_many_commit_tree(self, directory_name='.',
                              hardlink=False):
        """Create a tree with many commits.
        
        No file changes are included. Not hardlinking the working tree, 
        because there are no working tree files.
        """
        from bzrlib.benchmarks.tree_creator.simple_many_commit import (
            SimpleManyCommitTreeCreator,
            )
        creator = SimpleManyCommitTreeCreator(self, link_bzr=hardlink)
        return creator.create(root=directory_name)

    def make_heavily_merged_tree(self, directory_name='.',
                                 hardlink=False):
        """Create a tree in which almost every commit is a merge.
       
        No file changes are included.  This produces two trees, 
        one of which is returned.  Except for the first commit, every
        commit in its revision-history is a merge another commit in the other
        tree.  Not hardlinking the working tree, because there are no working 
        tree files.
        """
        from bzrlib.benchmarks.tree_creator.heavily_merged import (
            HeavilyMergedTreeCreator,
            )
        creator = HeavilyMergedTreeCreator(self, link_bzr=hardlink)
        return creator.create(root=directory_name)

    def create_with_commits(self, num_files, num_commits, directory_name='.',
                            hardlink=False):
        """Create a tree with many files and many commits. Every commit changes
        exactly one file.
        
        :param num_files: number of files to be created
        :param num_commits: number of commits in the newly created tree
        """
        from bzrlib.benchmarks.tree_creator.many_commit import (
            ManyCommitTreeCreator,
            )
        creator = ManyCommitTreeCreator(self, link_bzr=hardlink,
                                        num_files=num_files,
                                        num_commits=num_commits)
        tree = creator.create(root=directory_name)
        files = ["%s/%s" % (directory_name, fn) for fn in creator.files]
        return tree, files

    def commit_some_revisions(self, tree, files, num_commits,
                              changes_per_commit):
        """Commit a specified number of revisions to some files in a tree,
        makeing a specified number of changes per commit.

        :param tree: The tree in which the changes happen.
        :param files: The list of files where changes should occur.
        :param num_commits: The number of commits
        :param changes_per_commit: The number of files that are touched in 
        each commit.
        """
        for j in range(num_commits):
            for i in range(changes_per_commit):
                fn = files[(i + j) % changes_per_commit]
                content = range(i) + [i, i, i, '']
                f = open(fn, "w")
                try:
                    f.write("\n".join([str(k) for k in content]))
                finally:
                    f.close()
            tree.commit("new revision")


def test_suite():
    """Build and return a TestSuite which contains benchmark tests only."""
    testmod_names = [ \
                   'bzrlib.benchmarks.bench_add',
                   'bzrlib.benchmarks.bench_bench',
                   'bzrlib.benchmarks.bench_bundle',
                   'bzrlib.benchmarks.bench_cache_utf8',
                   'bzrlib.benchmarks.bench_checkout',
                   'bzrlib.benchmarks.bench_commit',
                   'bzrlib.benchmarks.bench_info',
                   'bzrlib.benchmarks.bench_inventory',
                   'bzrlib.benchmarks.bench_log',
                   'bzrlib.benchmarks.bench_osutils',
                   'bzrlib.benchmarks.bench_rocks',
                   'bzrlib.benchmarks.bench_startup',
                   'bzrlib.benchmarks.bench_status',
                   'bzrlib.benchmarks.bench_transform',
                   'bzrlib.benchmarks.bench_workingtree',
                   'bzrlib.benchmarks.bench_sftp',
                   'bzrlib.benchmarks.bench_xml',
                   ]
    suite = TestLoader().loadTestsFromModuleNames(testmod_names) 

    # Load any benchmarks from plugins
    for name, module in plugin.all_plugins().items():
        if getattr(module, 'bench_suite', None) is not None:
            suite.addTest(module.bench_suite())

    return suite