2014-01-01 03:54:24 +00:00
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# Copyright (C) 2013-2014 Free Software Foundation, Inc.
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2013-10-25 08:12:20 +00:00
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from perftest import perftest
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class BackTrace (perftest.TestCaseWithBasicMeasurements):
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def __init__(self, depth):
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super (BackTrace, self).__init__ ("backtrace")
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self.depth = depth
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def warm_up(self):
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# Warm up.
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gdb.execute ("bt", False, True)
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gdb.execute ("bt", False, True)
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def _do_test(self):
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"""Do backtrace multiple times."""
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do_test_command = "bt %d" % self.depth
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for _ in range(1, 15):
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gdb.execute (do_test_command, False, True)
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def execute_test(self):
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line_size = 2
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for _ in range(1, 12):
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# Keep the total size of dcache unchanged, and increase the
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# line-size in the loop.
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line_size_command = "set dcache line-size %d" % (line_size)
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size_command = "set dcache size %d" % (4096 * 64 / line_size)
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# Cache is cleared by changing line-size or size.
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gdb.execute (line_size_command)
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gdb.execute (size_command)
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func = lambda: self._do_test()
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self.measure.measure(func, line_size)
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line_size *= 2
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