/* Measure memcpy functions with large data sizes. Copyright (C) 2016-2019 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>