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authorSiddhesh Poyarekar <siddhesh@redhat.com>2013-06-04 16:48:56 +0530
committerSiddhesh Poyarekar <siddhesh@redhat.com>2013-06-11 15:08:13 +0530
commit9702047480d9002522936c5e1e1ebe16f696880d (patch)
tree9b37e288e4d57012a6186c280fd8837deca6dd4c /benchtests/bench-strnlen.c
parentc1f75dc386d533806d29b7e94118363a7b50eed8 (diff)
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Copy over string performance tests into benchtests
Copy over already existing string performance tests into benchtests. Bits not related to performance measurements have been omitted.
Diffstat (limited to 'benchtests/bench-strnlen.c')
-rw-r--r--benchtests/bench-strnlen.c139
1 files changed, 139 insertions, 0 deletions
diff --git a/benchtests/bench-strnlen.c b/benchtests/bench-strnlen.c
new file mode 100644
index 0000000..4233f27
--- /dev/null
+++ b/benchtests/bench-strnlen.c
@@ -0,0 +1,139 @@
+/* Measure strlen functions.
+ Copyright (C) 2013 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#define TEST_MAIN
+#define TEST_NAME "strnlen"
+#include "bench-string.h"
+
+typedef size_t (*proto_t) (const char *, size_t);
+size_t simple_strnlen (const char *, size_t);
+
+IMPL (simple_strnlen, 0)
+IMPL (strnlen, 1)
+
+size_t
+simple_strnlen (const char *s, size_t maxlen)
+{
+ size_t i;
+
+ for (i = 0; i < maxlen && s[i]; ++i);
+ return i;
+}
+
+static void
+do_one_test (impl_t *impl, const char *s, size_t maxlen, size_t exp_len)
+{
+ size_t len = CALL (impl, s, maxlen);
+ if (len != exp_len)
+ {
+ error (0, 0, "Wrong result in function %s %zd %zd", impl->name,
+ len, exp_len);
+ ret = 1;
+ return;
+ }
+
+ if (HP_TIMING_AVAIL)
+ {
+ hp_timing_t start __attribute ((unused));
+ hp_timing_t stop __attribute ((unused));
+ hp_timing_t best_time = ~ (hp_timing_t) 0;
+ size_t i;
+
+ for (i = 0; i < 32; ++i)
+ {
+ HP_TIMING_NOW (start);
+ CALL (impl, s, maxlen);
+ HP_TIMING_NOW (stop);
+ HP_TIMING_BEST (best_time, start, stop);
+ }
+
+ printf ("\t%zd", (size_t) best_time);
+ }
+}
+
+static void
+do_test (size_t align, size_t len, size_t maxlen, int max_char)
+{
+ size_t i;
+
+ align &= 7;
+ if (align + len >= page_size)
+ return;
+
+ for (i = 0; i < len; ++i)
+ buf1[align + i] = 1 + 7 * i % max_char;
+ buf1[align + len] = 0;
+
+ if (HP_TIMING_AVAIL)
+ printf ("Length %4zd, alignment %2zd:", len, align);
+
+ FOR_EACH_IMPL (impl, 0)
+ do_one_test (impl, (char *) (buf1 + align), maxlen, MIN (len, maxlen));
+
+ if (HP_TIMING_AVAIL)
+ putchar ('\n');
+}
+
+int
+test_main (void)
+{
+ size_t i;
+
+ test_init ();
+
+ printf ("%20s", "");
+ FOR_EACH_IMPL (impl, 0)
+ printf ("\t%s", impl->name);
+ putchar ('\n');
+
+ for (i = 1; i < 8; ++i)
+ {
+ do_test (0, i, i - 1, 127);
+ do_test (0, i, i, 127);
+ do_test (0, i, i + 1, 127);
+ }
+
+ for (i = 1; i < 8; ++i)
+ {
+ do_test (i, i, i - 1, 127);
+ do_test (i, i, i, 127);
+ do_test (i, i, i + 1, 127);
+ }
+
+ for (i = 2; i <= 10; ++i)
+ {
+ do_test (0, 1 << i, 5000, 127);
+ do_test (1, 1 << i, 5000, 127);
+ }
+
+ for (i = 1; i < 8; ++i)
+ do_test (0, i, 5000, 255);
+
+ for (i = 1; i < 8; ++i)
+ do_test (i, i, 5000, 255);
+
+ for (i = 2; i <= 10; ++i)
+ {
+ do_test (0, 1 << i, 5000, 255);
+ do_test (1, 1 << i, 5000, 255);
+ }
+
+ return ret;
+}
+
+#include "../test-skeleton.c"