+2013-11-25 Yao Qi <yao@codesourcery.com>
+
+ * gdb.perf/backtrace.c: New.
+ * gdb.perf/backtrace.exp: New.
+ * gdb.perf/backtrace.py: New.
+
2013-11-24 Yao Qi <yao@codesourcery.com>
* gdb.perf/single-step.c: New.
--- /dev/null
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright (C) 2013 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/>. */
+
+struct s
+{
+ int a[256];
+ char c[256];
+};
+
+static void
+fun2 (void)
+{
+
+}
+
+static void
+fun1 (int i, int j, long k, struct s ss)
+{
+ /* Allocate local variables on stack. */
+ struct s s1;
+
+ if (i < BACKTRACE_DEPTH)
+ fun1 (i + 1, j + 2, k - 1, ss);
+ else
+ {
+ int ii;
+
+ for (ii = 0; ii < 10; ii++)
+ fun2 ();
+ }
+}
+
+int
+main (void)
+{
+ struct s ss;
+
+ fun1 (0, 0, 200, ss);
+ return 0;
+}
--- /dev/null
+# Copyright (C) 2013 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/>.
+
+# This test case is to test the performance of GDB doing stack
+# backtrace.
+# There is one parameter in this test:
+# - BACKTRACE_DEPTH is the number of innermost frames that command
+# 'bt' prints.
+
+load_lib perftest.exp
+
+if [skip_perf_tests] {
+ return 0
+}
+
+standard_testfile .c
+set executable $testfile
+set expfile $testfile.exp
+
+# make check-perf RUNTESTFLAGS='backtrace.exp BACKTRACE_DEPTH=1024'
+if ![info exists BACKTRACE_DEPTH] {
+ set BACKTRACE_DEPTH 64
+}
+
+PerfTest::assemble {
+ global BACKTRACE_DEPTH
+ global srcdir subdir srcfile
+
+ set compile_flags {debug}
+ lappend compile_flags "additional_flags=-DBACKTRACE_DEPTH=${BACKTRACE_DEPTH}"
+
+ if { [gdb_compile "$srcdir/$subdir/$srcfile" ${binfile} executable $compile_flags] != ""} {
+ return -1
+ }
+
+ return 0
+} {
+ global binfile
+
+ clean_restart $binfile
+
+ if ![runto_main] {
+ fail "Can't run to main"
+ return -1
+ }
+
+ gdb_breakpoint "fun2"
+ gdb_continue_to_breakpoint "fun2"
+} {
+ global BACKTRACE_DEPTH
+
+ gdb_test "python BackTrace\($BACKTRACE_DEPTH\).run()"
+
+}
--- /dev/null
+# Copyright (C) 2013 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
projects / binutils-gdb.git / commitdiff