228 lines
6.4 KiB
C
228 lines
6.4 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <rte_common.h>
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#include <cmdline_parse.h>
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#include <rte_cycles.h>
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#include <rte_random.h>
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#include <rte_malloc.h>
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#include <rte_memcpy.h>
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#include "test.h"
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/*
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* Set this to the maximum buffer size you want to test. If it is 0, then the
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* values in the buf_sizes[] array below will be used.
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*/
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#define TEST_VALUE_RANGE 0
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/* List of buffer sizes to test */
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#if TEST_VALUE_RANGE == 0
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static size_t buf_sizes[] = {
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0, 1, 7, 8, 9, 15, 16, 17, 31, 32, 33, 63, 64, 65, 127, 128, 129, 255,
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256, 257, 320, 384, 511, 512, 513, 1023, 1024, 1025, 1518, 1522, 1600,
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2048, 3072, 4096, 5120, 6144, 7168, 8192
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};
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/* MUST be as large as largest packet size above */
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#define SMALL_BUFFER_SIZE 8192
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#else /* TEST_VALUE_RANGE != 0 */
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static size_t buf_sizes[TEST_VALUE_RANGE];
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#define SMALL_BUFFER_SIZE TEST_VALUE_RANGE
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#endif /* TEST_VALUE_RANGE == 0 */
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/*
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* Arrays of this size are used for measuring uncached memory accesses by
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* picking a random location within the buffer. Make this smaller if there are
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* memory allocation errors.
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*/
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#define LARGE_BUFFER_SIZE (100 * 1024 * 1024)
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/* How many times to run timing loop for performance tests */
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#define TEST_ITERATIONS 1000000
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#define TEST_BATCH_SIZE 100
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/* Data is aligned on this many bytes (power of 2) */
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#define ALIGNMENT_UNIT 16
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/* Structure with base memcpy func pointer, and number of bytes it copies */
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struct base_memcpy_func {
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void (*func)(uint8_t *dst, const uint8_t *src);
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unsigned size;
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};
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/* To create base_memcpy_func structure entries */
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#define BASE_FUNC(n) {rte_mov##n, n}
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/* Max number of bytes that can be copies with a "base" memcpy functions */
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#define MAX_BASE_FUNC_SIZE 256
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/*
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* Test the "base" memcpy functions, that a copy fixed number of bytes.
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*/
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static int
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base_func_test(void)
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{
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const struct base_memcpy_func base_memcpy_funcs[6] = {
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BASE_FUNC(16),
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BASE_FUNC(32),
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BASE_FUNC(48),
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BASE_FUNC(64),
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BASE_FUNC(128),
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BASE_FUNC(256),
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};
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unsigned i, j;
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unsigned num_funcs = sizeof(base_memcpy_funcs) / sizeof(base_memcpy_funcs[0]);
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uint8_t dst[MAX_BASE_FUNC_SIZE];
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uint8_t src[MAX_BASE_FUNC_SIZE];
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for (i = 0; i < num_funcs; i++) {
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unsigned size = base_memcpy_funcs[i].size;
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for (j = 0; j < size; j++) {
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dst[j] = 0;
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src[j] = (uint8_t) rte_rand();
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}
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base_memcpy_funcs[i].func(dst, src);
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for (j = 0; j < size; j++)
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if (dst[j] != src[j])
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return -1;
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}
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return 0;
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}
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/*
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* Create two buffers, and initialise one with random values. These are copied
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* to the second buffer and then compared to see if the copy was successful.
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* The bytes outside the copied area are also checked to make sure they were not
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* changed.
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*/
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static int
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test_single_memcpy(unsigned int off_src, unsigned int off_dst, size_t size)
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{
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unsigned int i;
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uint8_t dest[SMALL_BUFFER_SIZE + ALIGNMENT_UNIT];
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uint8_t src[SMALL_BUFFER_SIZE + ALIGNMENT_UNIT];
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void * ret;
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/* Setup buffers */
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for (i = 0; i < SMALL_BUFFER_SIZE + ALIGNMENT_UNIT; i++) {
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dest[i] = 0;
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src[i] = (uint8_t) rte_rand();
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}
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/* Do the copy */
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ret = rte_memcpy(dest + off_dst, src + off_src, size);
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if (ret != (dest + off_dst)) {
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printf("rte_memcpy() returned %p, not %p\n",
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ret, dest + off_dst);
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}
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/* Check nothing before offset is affected */
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for (i = 0; i < off_dst; i++) {
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if (dest[i] != 0) {
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printf("rte_memcpy() failed for %u bytes (offsets=%u,%u): "
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"[modified before start of dst].\n",
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(unsigned)size, off_src, off_dst);
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return -1;
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}
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}
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/* Check everything was copied */
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for (i = 0; i < size; i++) {
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if (dest[i + off_dst] != src[i + off_src]) {
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printf("rte_memcpy() failed for %u bytes (offsets=%u,%u): "
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"[didn't copy byte %u].\n",
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(unsigned)size, off_src, off_dst, i);
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return -1;
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}
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}
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/* Check nothing after copy was affected */
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for (i = size; i < SMALL_BUFFER_SIZE; i++) {
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if (dest[i + off_dst] != 0) {
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printf("rte_memcpy() failed for %u bytes (offsets=%u,%u): "
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"[copied too many].\n",
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(unsigned)size, off_src, off_dst);
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return -1;
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}
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}
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return 0;
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}
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/*
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* Check functionality for various buffer sizes and data offsets/alignments.
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*/
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static int
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func_test(void)
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{
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unsigned int off_src, off_dst, i;
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unsigned int num_buf_sizes = sizeof(buf_sizes) / sizeof(buf_sizes[0]);
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int ret;
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for (off_src = 0; off_src < ALIGNMENT_UNIT; off_src++) {
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for (off_dst = 0; off_dst < ALIGNMENT_UNIT; off_dst++) {
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for (i = 0; i < num_buf_sizes; i++) {
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ret = test_single_memcpy(off_src, off_dst,
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buf_sizes[i]);
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if (ret != 0)
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return -1;
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}
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}
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}
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return 0;
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}
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int
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test_memcpy(void)
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{
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int ret;
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ret = func_test();
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if (ret != 0)
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return -1;
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ret = base_func_test();
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if (ret != 0)
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return -1;
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return 0;
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}
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