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-rw-r--r--benchtests/bench-memcpy-large.c126
1 files changed, 126 insertions, 0 deletions
diff --git a/benchtests/bench-memcpy-large.c b/benchtests/bench-memcpy-large.c
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+++ b/benchtests/bench-memcpy-large.c
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+/* Measure memcpy functions with large data sizes.
+ Copyright (C) 2016-2018 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/>. */
+
+#ifndef MEMCPY_RESULT
+# define MEMCPY_RESULT(dst, len) dst
+# define START_SIZE (64 * 1024)
+# define MIN_PAGE_SIZE (getpagesize () + 32 * 1024 * 1024)
+# define TEST_MAIN
+# define TEST_NAME "memcpy"
+# define TIMEOUT (20 * 60)
+# include "bench-string.h"
+
+IMPL (memcpy, 1)
+#endif
+
+#include "json-lib.h"
+
+typedef char *(*proto_t) (char *, const char *, size_t);
+
+static void
+do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, const char *src,
+ size_t len)
+{
+ size_t i, iters = 16;
+ timing_t start, stop, cur;
+
+ TIMING_NOW (start);
+ for (i = 0; i < iters; ++i)
+ {
+ CALL (impl, dst, src, len);
+ }
+ TIMING_NOW (stop);
+
+ TIMING_DIFF (cur, start, stop);
+
+ json_element_double (json_ctx, (double) cur / (double) iters);
+}
+
+static void
+do_test (json_ctx_t *json_ctx, size_t align1, size_t align2, size_t len)
+{
+ size_t i, j;
+ char *s1, *s2;
+
+ align1 &= 63;
+ if (align1 + len >= page_size)
+ return;
+
+ align2 &= 63;
+ 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;
+
+ json_element_object_begin (json_ctx);
+ json_attr_uint (json_ctx, "length", (double) len);
+ json_attr_uint (json_ctx, "align1", (double) align1);
+ json_attr_uint (json_ctx, "align2", (double) align2);
+ json_array_begin (json_ctx, "timings");
+
+ FOR_EACH_IMPL (impl, 0)
+ do_one_test (json_ctx, impl, s2, s1, len);
+
+ json_array_end (json_ctx);
+ json_element_object_end (json_ctx);
+}
+
+int
+test_main (void)
+{
+ json_ctx_t json_ctx;
+ size_t i;
+
+ test_init ();
+
+ json_init (&json_ctx, 0, stdout);
+
+ json_document_begin (&json_ctx);
+ json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
+
+ json_attr_object_begin (&json_ctx, "functions");
+ json_attr_object_begin (&json_ctx, TEST_NAME);
+ json_attr_string (&json_ctx, "bench-variant", "large");
+
+ json_array_begin (&json_ctx, "ifuncs");
+ FOR_EACH_IMPL (impl, 0)
+ json_element_string (&json_ctx, impl->name);
+ json_array_end (&json_ctx);
+
+ json_array_begin (&json_ctx, "results");
+ for (i = START_SIZE; i <= MIN_PAGE_SIZE; i <<= 1)
+ {
+ do_test (&json_ctx, 0, 0, i + 7);
+ do_test (&json_ctx, 0, 3, i + 15);
+ do_test (&json_ctx, 3, 0, i + 31);
+ do_test (&json_ctx, 3, 5, i + 63);
+ }
+
+ json_array_end (&json_ctx);
+ json_attr_object_end (&json_ctx);
+ json_attr_object_end (&json_ctx);
+ json_document_end (&json_ctx);
+
+ return ret;
+}
+
+#include <support/test-driver.c>