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authorH.J. Lu <hjl.tools@gmail.com>2016-04-06 08:37:20 -0700
committerH.J. Lu <hjl.tools@gmail.com>2016-04-06 08:37:39 -0700
commita25322f4e855eb5b24c63c2395c941c3327627ca (patch)
treecc8b1f49463d80b515ebbac336aad323bd974f4a /benchtests/bench-memset-large.c
parentaa7353ce5cb7acc83fe4fb45ef9d9a0cd67dcbda (diff)
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Add memcpy/memmove/memset benchmarks with large data
Add memcpy, memmove and memset benchmarks with large data sizes. * benchtests/Makefile (string-benchset): Add memcpy-large, memmove-large and memset-large. * benchtests/bench-memcpy-large.c: New file. * benchtests/bench-memmove-large.c: Likewise. * benchtests/bench-memmove-large.c: Likewise. * benchtests/bench-string.h (TIMEOUT): Don't redefine.
Diffstat (limited to 'benchtests/bench-memset-large.c')
-rw-r--r--benchtests/bench-memset-large.c134
1 files changed, 134 insertions, 0 deletions
diff --git a/benchtests/bench-memset-large.c b/benchtests/bench-memset-large.c
new file mode 100644
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+++ b/benchtests/bench-memset-large.c
@@ -0,0 +1,134 @@
+/* Measure memset functions with large data sizes.
+ Copyright (C) 2016 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
+#ifndef WIDE
+# define TEST_NAME "memset"
+#else
+# define TEST_NAME "wmemset"
+#endif /* WIDE */
+#define START_SIZE (128 * 1024)
+#define MIN_PAGE_SIZE (getpagesize () + 64 * 1024 * 1024)
+#define TIMEOUT (20 * 60)
+#include "bench-string.h"
+
+#ifndef WIDE
+# define MEMSET memset
+# define CHAR char
+# define SIMPLE_MEMSET simple_memset
+# define MEMCMP memcmp
+#else
+# include <wchar.h>
+# define MEMSET wmemset
+# define CHAR wchar_t
+# define SIMPLE_MEMSET simple_wmemset
+# define MEMCMP wmemcmp
+#endif /* WIDE */
+
+#include <assert.h>
+
+IMPL (MEMSET, 1)
+
+typedef CHAR *(*proto_t) (CHAR *, int, size_t);
+
+CHAR *
+inhibit_loop_to_libcall
+SIMPLE_MEMSET (CHAR *s, int c, size_t n)
+{
+ CHAR *r = s, *end = s + n;
+ while (r < end)
+ *r++ = c;
+ return s;
+}
+
+static void
+do_one_test (impl_t *impl, CHAR *s, int c __attribute ((unused)), size_t n)
+{
+ size_t i, iters = 16;
+ timing_t start, stop, cur;
+ CHAR *tstbuf = malloc (n * sizeof (*s));
+ assert (tstbuf != NULL);
+
+ /* Must clear the destination buffer updated by the previous run. */
+ for (i = 0; i < n; i++)
+ s[i] = 0;
+
+ CHAR *res = CALL (impl, s, c, n);
+ if (res != s
+ || SIMPLE_MEMSET (tstbuf, c, n) != tstbuf
+ || MEMCMP (s, tstbuf, n) != 0)
+ {
+ error (0, 0, "Wrong result in function %s", impl->name);
+ ret = 1;
+ free (tstbuf);
+ return;
+ }
+
+ TIMING_NOW (start);
+ for (i = 0; i < iters; ++i)
+ {
+ CALL (impl, s, c, n);
+ }
+ TIMING_NOW (stop);
+
+ TIMING_DIFF (cur, start, stop);
+
+ TIMING_PRINT_MEAN ((double) cur, (double) iters);
+
+ free (tstbuf);
+}
+
+static void
+do_test (size_t align, int c, size_t len)
+{
+ align &= 63;
+ if ((align + len) * sizeof (CHAR) > page_size)
+ return;
+
+ printf ("Length %4zd, alignment %2zd, c %2d:", len, align, c);
+
+ FOR_EACH_IMPL (impl, 0)
+ do_one_test (impl, (CHAR *) (buf1) + align, c, len);
+
+ putchar ('\n');
+}
+
+int
+test_main (void)
+{
+ size_t i;
+ int c;
+
+ test_init ();
+
+ printf ("%24s", "");
+ FOR_EACH_IMPL (impl, 0)
+ printf ("\t%s", impl->name);
+ putchar ('\n');
+
+ c = 65;
+ for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1)
+ {
+ do_test (0, c, i);
+ do_test (3, c, i);
+ }
+
+ return ret;
+}
+
+#include "../test-skeleton.c"