50 lines
1.8 KiB
Python
50 lines
1.8 KiB
Python
# Copyright (C) 2013-2016 Free Software Foundation, Inc.
|
|
|
|
# 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 3 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, see <http://www.gnu.org/licenses/>.
|
|
|
|
from perftest import perftest
|
|
|
|
class BackTrace (perftest.TestCaseWithBasicMeasurements):
|
|
def __init__(self, depth):
|
|
super (BackTrace, self).__init__ ("backtrace")
|
|
self.depth = depth
|
|
|
|
def warm_up(self):
|
|
# Warm up.
|
|
gdb.execute ("bt", False, True)
|
|
gdb.execute ("bt", False, True)
|
|
|
|
def _do_test(self):
|
|
"""Do backtrace multiple times."""
|
|
do_test_command = "bt %d" % self.depth
|
|
for _ in range(1, 15):
|
|
gdb.execute (do_test_command, False, True)
|
|
|
|
def execute_test(self):
|
|
|
|
line_size = 2
|
|
for _ in range(1, 12):
|
|
# Keep the total size of dcache unchanged, and increase the
|
|
# line-size in the loop.
|
|
line_size_command = "set dcache line-size %d" % (line_size)
|
|
size_command = "set dcache size %d" % (4096 * 64 / line_size)
|
|
# Cache is cleared by changing line-size or size.
|
|
gdb.execute (line_size_command)
|
|
gdb.execute (size_command)
|
|
|
|
func = lambda: self._do_test()
|
|
|
|
self.measure.measure(func, line_size)
|
|
|
|
line_size *= 2
|