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.

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
index 0000000..e694b92
--- /dev/null
+++ 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"