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618f726f | 1 | # Copyright (C) 2013-2016 Free Software Foundation, Inc. |
23e9d3b9 YQ |
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 3 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, see <http://www.gnu.org/licenses/>. | |
15 | ||
16 | from perftest import perftest | |
17 | ||
18 | class BackTrace (perftest.TestCaseWithBasicMeasurements): | |
19 | def __init__(self, depth): | |
20 | super (BackTrace, self).__init__ ("backtrace") | |
21 | self.depth = depth | |
22 | ||
23 | def warm_up(self): | |
24 | # Warm up. | |
25 | gdb.execute ("bt", False, True) | |
26 | gdb.execute ("bt", False, True) | |
27 | ||
28 | def _do_test(self): | |
29 | """Do backtrace multiple times.""" | |
30 | do_test_command = "bt %d" % self.depth | |
31 | for _ in range(1, 15): | |
32 | gdb.execute (do_test_command, False, True) | |
33 | ||
34 | def execute_test(self): | |
35 | ||
36 | line_size = 2 | |
37 | for _ in range(1, 12): | |
38 | # Keep the total size of dcache unchanged, and increase the | |
39 | # line-size in the loop. | |
40 | line_size_command = "set dcache line-size %d" % (line_size) | |
41 | size_command = "set dcache size %d" % (4096 * 64 / line_size) | |
42 | # Cache is cleared by changing line-size or size. | |
43 | gdb.execute (line_size_command) | |
44 | gdb.execute (size_command) | |
45 | ||
46 | func = lambda: self._do_test() | |
47 | ||
48 | self.measure.measure(func, line_size) | |
49 | ||
50 | line_size *= 2 |