From a25322f4e855eb5b24c63c2395c941c3327627ca Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Wed, 6 Apr 2016 08:37:20 -0700
Subject: 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.
---
 benchtests/bench-memmove-large.c | 123 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 123 insertions(+)
 create mode 100644 benchtests/bench-memmove-large.c

(limited to 'benchtests/bench-memmove-large.c')

diff --git a/benchtests/bench-memmove-large.c b/benchtests/bench-memmove-large.c
new file mode 100644
index 0000000..b8f11c1
--- /dev/null
+++ b/benchtests/bench-memmove-large.c
@@ -0,0 +1,123 @@
+/* Measure memmove 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 BASE_PAGE_SIZE (1024 * 1024)
+#define START_SIZE (4 * 1024)
+#define MIN_PAGE_SIZE (getpagesize () + 16 * 1024 * 1024)
+#define TEST_MAIN
+#define TEST_NAME "memmove"
+#define TIMEOUT (20 * 60)
+#include "bench-string.h"
+
+IMPL (memmove, 1)
+
+typedef char *(*proto_t) (char *, const char *, size_t);
+
+static void
+do_one_test (impl_t *impl, char *dst, char *src, const char *orig_src,
+	     size_t len)
+{
+  size_t i, iters = 16;
+  timing_t start, stop, cur;
+
+  /* This also clears the destination buffer updated by the previous
+     run.  */
+  memcpy (src, orig_src, len);
+
+  char *res = CALL (impl, dst, src, len);
+  if (res != dst)
+    {
+      error (0, 0, "Wrong result in function %s %p %p", impl->name,
+	     res, dst);
+      ret = 1;
+      return;
+    }
+
+  if (memcmp (dst, orig_src, len) != 0)
+    {
+      error (0, 0, "Wrong result in function %s dst \"%s\" src \"%s\"",
+	     impl->name, dst, src);
+      ret = 1;
+      return;
+    }
+
+  TIMING_NOW (start);
+  for (i = 0; i < iters; ++i)
+    {
+      CALL (impl, dst, src, len);
+    }
+  TIMING_NOW (stop);
+
+  TIMING_DIFF (cur, start, stop);
+
+  TIMING_PRINT_MEAN ((double) cur, (double) iters);
+}
+
+static void
+do_test (size_t align1, size_t align2, size_t len)
+{
+  size_t i, j;
+  char *s1, *s2;
+
+  align1 &= 127;
+  if (align1 + len >= page_size)
+    return;
+
+  align2 &= 127;
+  if (align2 + len >= page_size)
+    return;
+
+  s1 = (char *) (buf1 + align1);
+  s2 = (char *) (buf2 + align2);
+
+  for (i = 0, j = 1; i < len; i++, j += 23)
+    s1[i] = j;
+
+  printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);
+
+  FOR_EACH_IMPL (impl, 0)
+    do_one_test (impl, s2, (char *) (buf2 + align1), s1, len);
+
+  putchar ('\n');
+}
+
+int
+test_main (void)
+{
+  size_t i;
+
+  test_init ();
+
+  printf ("%23s", "");
+  FOR_EACH_IMPL (impl, 0)
+    printf ("\t%s", impl->name);
+  putchar ('\n');
+
+  for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1)
+    {
+      do_test (0, 64, i + 7);
+      do_test (0, 3, i + 15);
+      do_test (3, 0, i + 31);
+      do_test (3, 7, i + 63);
+      do_test (9, 5, i + 127);
+    }
+
+  return ret;
+}
+
+#include "../test-skeleton.c"
-- 
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