← Back to branch summary

~bzr-pqm/bzr/bzr.dev

« back to all changes in this revision

Viewing changes to bzrlib/benchmarks/__init__.py

  • Committer: Ian Clatworthy
  • Date: 2007-11-28 00:18:10 UTC
  • mto: (3054.1.1 ianc-integration)
  • mto: This revision was merged to the branch mainline in revision 3055.
  • Revision ID: ian.clatworthy@internode.on.net-20071128001810-978qqnjpd12u4we2
change Makefile to support tutorials

Show diffs side-by-side

added added

removed removed

Lines of Context:
bzrlib/benchmarks/__init__.py
 
1
# Copyright (C) 2006 Canonical Ltd
 
2
#
 
3
# This program is free software; you can redistribute it and/or modify
 
4
# it under the terms of the GNU General Public License as published by
 
5
# the Free Software Foundation; either version 2 of the License, or
 
6
# (at your option) any later version.
 
7
#
 
8
# This program is distributed in the hope that it will be useful,
 
9
# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
11
# GNU General Public License for more details.
 
12
#
 
13
# You should have received a copy of the GNU General Public License
 
14
# along with this program; if not, write to the Free Software
 
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
16
 
 
17
"""Benchmark test suite for bzr."""
 
18
 
 
19
from bzrlib import (
 
20
    bzrdir,
 
21
    )
 
22
from bzrlib import plugin as _mod_plugin
 
23
import bzrlib.branch
 
24
from bzrlib.tests.TestUtil import TestLoader
 
25
from bzrlib.tests.blackbox import ExternalBase
 
26
 
 
27
 
 
28
class Benchmark(ExternalBase):
 
29
    """A Test class which provides helpers for writing benchmark tests."""
 
30
 
 
31
    def make_kernel_like_tree(self, url=None, root='.',
 
32
                              link_working=False):
 
33
        """Setup a temporary tree roughly like a kernel tree.
 
34
 
 
35
        :param url: Creat the kernel like tree as a lightweight checkout
 
36
            of a new branch created at url.
 
37
        :param root: Path where the tree will be created.
 
38
        :param link_working: instead of creating a new copy of all files
 
39
            just hardlink the working tree. Tests must request this, because
 
40
            they must break links if they want to change the files
 
41
        :return: A newly created tree.
 
42
        """
 
43
        from bzrlib.benchmarks.tree_creator.kernel_like import (
 
44
            KernelLikeTreeCreator,
 
45
            )
 
46
        creator = KernelLikeTreeCreator(self, link_working=link_working,
 
47
                                        url=url)
 
48
        return creator.create(root=root)
 
49
 
 
50
    def make_kernel_like_added_tree(self, root='.',
 
51
                                    link_working=True,
 
52
                                    hot_cache=True):
 
53
        """Make a kernel like tree, with all files added
 
54
 
 
55
        :param root: Where to create the files
 
56
        :param link_working: Instead of copying all of the working tree
 
57
            files, just hardlink them to the cached files. Tests can unlink
 
58
            files that they will change.
 
59
        :param hot_cache: Run through the newly created tree and make sure
 
60
            the stat-cache is correct. The old way of creating a freshly
 
61
            added tree always had a hot cache.
 
62
        """
 
63
        from bzrlib.benchmarks.tree_creator.kernel_like import (
 
64
            KernelLikeAddedTreeCreator,
 
65
            )
 
66
        creator = KernelLikeAddedTreeCreator(self, link_working=link_working,
 
67
                                             hot_cache=hot_cache)
 
68
        return creator.create(root=root)
 
69
 
 
70
    def make_kernel_like_committed_tree(self, root='.',
 
71
                                    link_working=True,
 
72
                                    link_bzr=False,
 
73
                                    hot_cache=True):
 
74
        """Make a kernel like tree, with all files added and committed
 
75
 
 
76
        :param root: Where to create the files
 
77
        :param link_working: Instead of copying all of the working tree
 
78
            files, just hardlink them to the cached files. Tests can unlink
 
79
            files that they will change.
 
80
        :param link_bzr: Hardlink the .bzr directory. For readonly 
 
81
            operations this is safe, and shaves off a lot of setup time
 
82
        """
 
83
        from bzrlib.benchmarks.tree_creator.kernel_like import (
 
84
            KernelLikeCommittedTreeCreator,
 
85
            )
 
86
        creator = KernelLikeCommittedTreeCreator(self,
 
87
                                                 link_working=link_working,
 
88
                                                 link_bzr=link_bzr,
 
89
                                                 hot_cache=hot_cache)
 
90
        return creator.create(root=root)
 
91
 
 
92
    def make_kernel_like_inventory(self):
 
93
        """Create an inventory with the properties of a kernel-like tree
 
94
 
 
95
        This should be equivalent to a committed kernel like tree, not
 
96
        just a working tree.
 
97
        """
 
98
        from bzrlib.benchmarks.tree_creator.kernel_like import (
 
99
            KernelLikeInventoryCreator,
 
100
            )
 
101
        creator = KernelLikeInventoryCreator(self)
 
102
        return creator.create()
 
103
 
 
104
    def make_many_commit_tree(self, directory_name='.',
 
105
                              hardlink=False):
 
106
        """Create a tree with many commits.
 
107
        
 
108
        No file changes are included. Not hardlinking the working tree, 
 
109
        because there are no working tree files.
 
110
        """
 
111
        from bzrlib.benchmarks.tree_creator.simple_many_commit import (
 
112
            SimpleManyCommitTreeCreator,
 
113
            )
 
114
        creator = SimpleManyCommitTreeCreator(self, link_bzr=hardlink)
 
115
        return creator.create(root=directory_name)
 
116
 
 
117
    def make_heavily_merged_tree(self, directory_name='.',
 
118
                                 hardlink=False):
 
119
        """Create a tree in which almost every commit is a merge.
 
120
       
 
121
        No file changes are included.  This produces two trees, 
 
122
        one of which is returned.  Except for the first commit, every
 
123
        commit in its revision-history is a merge another commit in the other
 
124
        tree.  Not hardlinking the working tree, because there are no working 
 
125
        tree files.
 
126
        """
 
127
        from bzrlib.benchmarks.tree_creator.heavily_merged import (
 
128
            HeavilyMergedTreeCreator,
 
129
            )
 
130
        creator = HeavilyMergedTreeCreator(self, link_bzr=hardlink)
 
131
        return creator.create(root=directory_name)
 
132
 
 
133
    def create_with_commits(self, num_files, num_commits, directory_name='.',
 
134
                            hardlink=False):
 
135
        """Create a tree with many files and many commits. Every commit changes
 
136
        exactly one file.
 
137
 
 
138
        :param num_files: number of files to be created
 
139
        :param num_commits: number of commits in the newly created tree
 
140
        """
 
141
        from bzrlib.benchmarks.tree_creator.many_commit import (
 
142
            ManyCommitTreeCreator,
 
143
            )
 
144
        creator = ManyCommitTreeCreator(self, link_bzr=hardlink,
 
145
                                        num_files=num_files,
 
146
                                        num_commits=num_commits)
 
147
        tree = creator.create(root=directory_name)
 
148
        files = ["%s/%s" % (directory_name, fn) for fn in creator.files]
 
149
        return tree, files
 
150
 
 
151
    def commit_some_revisions(self, tree, files, num_commits,
 
152
                              changes_per_commit):
 
153
        """Commit a specified number of revisions to some files in a tree,
 
154
        makeing a specified number of changes per commit.
 
155
 
 
156
        :param tree: The tree in which the changes happen.
 
157
        :param files: The list of files where changes should occur.
 
158
        :param num_commits: The number of commits
 
159
        :param changes_per_commit: The number of files that are touched in
 
160
            each commit.
 
161
        """
 
162
        for j in range(num_commits):
 
163
            for i in range(changes_per_commit):
 
164
                fn = files[(i + j) % changes_per_commit]
 
165
                content = range(i) + [i, i, i, '']
 
166
                f = open(fn, "w")
 
167
                try:
 
168
                    f.write("\n".join([str(k) for k in content]))
 
169
                finally:
 
170
                    f.close()
 
171
            tree.commit("new revision")
 
172
 
 
173
 
 
174
def test_suite():
 
175
    """Build and return a TestSuite which contains benchmark tests only."""
 
176
    testmod_names = [ \
 
177
                   'bzrlib.benchmarks.bench_add',
 
178
                   'bzrlib.benchmarks.bench_bench',
 
179
                   'bzrlib.benchmarks.bench_bundle',
 
180
                   'bzrlib.benchmarks.bench_cache_utf8',
 
181
                   'bzrlib.benchmarks.bench_checkout',
 
182
                   'bzrlib.benchmarks.bench_commit',
 
183
                   'bzrlib.benchmarks.bench_dirstate',
 
184
                   'bzrlib.benchmarks.bench_info',
 
185
                   'bzrlib.benchmarks.bench_inventory',
 
186
                   'bzrlib.benchmarks.bench_knit',
 
187
                   'bzrlib.benchmarks.bench_log',
 
188
                   'bzrlib.benchmarks.bench_pack',
 
189
                   'bzrlib.benchmarks.bench_osutils',
 
190
                   'bzrlib.benchmarks.bench_rocks',
 
191
                   'bzrlib.benchmarks.bench_startup',
 
192
                   'bzrlib.benchmarks.bench_status',
 
193
                   'bzrlib.benchmarks.bench_transform',
 
194
                   'bzrlib.benchmarks.bench_workingtree',
 
195
                   'bzrlib.benchmarks.bench_sftp',
 
196
                   'bzrlib.benchmarks.bench_xml',
 
197
                   ]
 
198
    suite = TestLoader().loadTestsFromModuleNames(testmod_names) 
 
199
 
 
200
    # Load any benchmarks from plugins
 
201
    for name, plugin in _mod_plugin.plugins().items():
 
202
        if getattr(plugin.module, 'bench_suite', None) is not None:
 
203
            suite.addTest(plugin.module.bench_suite())
 
204
 
 
205
    return suite