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2623479105
Adjust iteration counts so benchmarks don't run too slowly or quickly. Ensure benchmarks take less than 10 seconds on older, slower cores and more than 0.5 seconds on fast cores. Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
144 lines
3.6 KiB
C
144 lines
3.6 KiB
C
/* Measure hash functions runtime.
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Copyright (C) 2022-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#define TEST_MAIN
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#ifndef TEST_FUNC
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# error "No TEST_FUNC provided!"
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#endif
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#ifndef SIMPLE_TEST_FUNC
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# error "No SIMPLE_TEST_FUNC provided!"
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#endif
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#ifndef TEST_NAME
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# define STRINGIFY_PRIMITIVE(x) # x
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# define STRINGIFY(x) STRINGIFY_PRIMITIVE (x)
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# define TEST_NAME STRINGIFY (TEST_FUNC)
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#endif
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#include "json-lib.h"
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#include "bench-timing.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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enum
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{
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NFIXED_ITERS = 1048576,
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NRAND_BUFS = 16384,
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NRAND_ITERS = 256,
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RAND_BENCH_MAX_LEN = 128
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};
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#include "bench-hash-funcs-kernel.h"
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#define SIMPLE
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#include "bench-hash-funcs-kernel.h"
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static void
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do_one_test (json_ctx_t *json_ctx, size_t len)
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{
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char buf[len + 1];
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memset (buf, -1, len);
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buf[len] = '\0';
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json_element_object_begin (json_ctx);
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json_attr_string (json_ctx, "type", "fixed");
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json_attr_uint (json_ctx, "length", len);
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json_attr_double (json_ctx, "time_simple", do_one_test_kernel_simple (buf, len));
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json_attr_double (json_ctx, "time_optimized", do_one_test_kernel_optimized (buf, len));
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json_element_object_end (json_ctx);
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}
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static void __attribute__ ((noinline, noclone))
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do_rand_test (json_ctx_t *json_ctx)
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{
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size_t i, sz, offset;
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char *bufs;
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unsigned int *sizes;
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bufs = (char *) calloc (NRAND_BUFS, RAND_BENCH_MAX_LEN);
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sizes = (unsigned int *) calloc (NRAND_BUFS, sizeof (unsigned int));
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if (bufs == NULL || sizes == NULL)
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{
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fprintf (stderr, "Failed to allocate bufs for random test\n");
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goto done;
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}
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for (sz = 2; sz <= RAND_BENCH_MAX_LEN; sz += sz)
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{
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json_element_object_begin (json_ctx);
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json_attr_string (json_ctx, "type", "random");
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json_attr_uint (json_ctx, "length", sz);
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for (i = 0, offset = 0; i < NRAND_BUFS;
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++i, offset += RAND_BENCH_MAX_LEN)
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{
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sizes[i] = random () % sz;
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memset (bufs + offset, -1, sizes[i]);
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bufs[offset + sizes[i]] = '\0';
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}
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json_attr_double (json_ctx, "time_simple",
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do_rand_test_kernel_simple (bufs, sizes));
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json_attr_double (json_ctx, "time_optimized",
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do_rand_test_kernel_optimized (bufs, sizes));
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json_element_object_end (json_ctx);
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}
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done:
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if (bufs)
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free (bufs);
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if (sizes)
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free (sizes);
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}
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static int
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do_test (void)
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{
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int i;
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json_ctx_t json_ctx;
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json_init (&json_ctx, 0, stdout);
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json_document_begin (&json_ctx);
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json_attr_string (&json_ctx, "timing_type", TIMING_TYPE);
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json_attr_object_begin (&json_ctx, "functions");
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json_attr_object_begin (&json_ctx, TEST_NAME);
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json_array_begin (&json_ctx, "results");
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for (i = 0; i < 16; ++i)
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do_one_test (&json_ctx, i);
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for (i = 16; i <= 256; i += i)
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do_one_test (&json_ctx, i);
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do_rand_test (&json_ctx);
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json_array_end (&json_ctx);
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json_attr_object_end (&json_ctx);
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json_attr_object_end (&json_ctx);
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json_document_end (&json_ctx);
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return 0;
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}
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#include <support/test-driver.c>
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