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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-memmove-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-memmove-large.c')
-rw-r--r--benchtests/bench-memmove-large.c123
1 files changed, 123 insertions, 0 deletions
diff --git a/benchtests/bench-memmove-large.c b/benchtests/bench-memmove-large.c
new file mode 100644
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+++ b/benchtests/bench-memmove-large.c
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+/* 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"