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Diffstat (limited to 'benchtests/bench-memmove-large.c')
-rw-r--r-- | benchtests/bench-memmove-large.c | 125 |
1 files changed, 125 insertions, 0 deletions
diff --git a/benchtests/bench-memmove-large.c b/benchtests/bench-memmove-large.c new file mode 100644 index 0000000000..958151a6b4 --- /dev/null +++ b/benchtests/bench-memmove-large.c @@ -0,0 +1,125 @@ +/* Measure memmove 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/>. */ + +#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" +#include "json-lib.h" + +IMPL (memmove, 1) + +typedef char *(*proto_t) (char *, const char *, size_t); + +static void +do_one_test (json_ctx_t *json_ctx, impl_t *impl, char *dst, char *src, const + char *orig_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 &= 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; + + 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, (char *) (buf2 + align1), 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, "memmove"); + 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, 64, i + 7); + do_test (&json_ctx, 0, 3, i + 15); + do_test (&json_ctx, 3, 0, i + 31); + do_test (&json_ctx, 3, 7, i + 63); + do_test (&json_ctx, 9, 5, i + 127); + } + + 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> |