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88b9d363 | 1 | # Copyright (C) 2013-2022 Free Software Foundation, Inc. |
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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 | ||
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18 | |
19 | class BackTrace(perftest.TestCaseWithBasicMeasurements): | |
23e9d3b9 | 20 | def __init__(self, depth): |
13123da8 | 21 | super(BackTrace, self).__init__("backtrace") |
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22 | self.depth = depth |
23 | ||
24 | def warm_up(self): | |
25 | # Warm up. | |
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26 | gdb.execute("bt", False, True) |
27 | gdb.execute("bt", False, True) | |
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28 | |
29 | def _do_test(self): | |
30 | """Do backtrace multiple times.""" | |
31 | do_test_command = "bt %d" % self.depth | |
32 | for _ in range(1, 15): | |
13123da8 | 33 | gdb.execute(do_test_command, False, True) |
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34 | |
35 | def execute_test(self): | |
36 | ||
37 | line_size = 2 | |
38 | for _ in range(1, 12): | |
39 | # Keep the total size of dcache unchanged, and increase the | |
40 | # line-size in the loop. | |
41 | line_size_command = "set dcache line-size %d" % (line_size) | |
42 | size_command = "set dcache size %d" % (4096 * 64 / line_size) | |
43 | # Cache is cleared by changing line-size or size. | |
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44 | gdb.execute(line_size_command) |
45 | gdb.execute(size_command) | |
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46 | |
47 | func = lambda: self._do_test() | |
48 | ||
49 | self.measure.measure(func, line_size) | |
50 | ||
51 | line_size *= 2 |