--- /dev/null
+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include <rte_common.h>
+#include <rte_cycles.h>
+#include <rte_random.h>
+#include <rte_malloc.h>
+
+#include <rte_memcpy.h>
+
+#include "test.h"
+
+/*
+ * Set this to the maximum buffer size you want to test. If it is 0, then the
+ * values in the buf_sizes[] array below will be used.
+ */
+#define TEST_VALUE_RANGE 0
+
+/* List of buffer sizes to test */
+#if TEST_VALUE_RANGE == 0
+static size_t buf_sizes[] = {
+ 0, 1, 7, 8, 9, 15, 16, 17, 31, 32, 33, 63, 64, 65, 127, 128, 129, 255,
+ 256, 257, 320, 384, 511, 512, 513, 1023, 1024, 1025, 1518, 1522, 1600,
+ 2048, 3072, 4096, 5120, 6144, 7168, 8192
+};
+/* MUST be as large as largest packet size above */
+#define SMALL_BUFFER_SIZE 8192
+#else /* TEST_VALUE_RANGE != 0 */
+static size_t buf_sizes[TEST_VALUE_RANGE];
+#define SMALL_BUFFER_SIZE TEST_VALUE_RANGE
+#endif /* TEST_VALUE_RANGE == 0 */
+
+
+/*
+ * Arrays of this size are used for measuring uncached memory accesses by
+ * picking a random location within the buffer. Make this smaller if there are
+ * memory allocation errors.
+ */
+#define LARGE_BUFFER_SIZE (100 * 1024 * 1024)
+
+/* How many times to run timing loop for performance tests */
+#define TEST_ITERATIONS 1000000
+#define TEST_BATCH_SIZE 100
+
+/* Data is aligned on this many bytes (power of 2) */
+#define ALIGNMENT_UNIT 32
+
+
+/*
+ * Create two buffers, and initialise one with random values. These are copied
+ * to the second buffer and then compared to see if the copy was successful.
+ * The bytes outside the copied area are also checked to make sure they were not
+ * changed.
+ */
+static int
+test_single_memcpy(unsigned int off_src, unsigned int off_dst, size_t size)
+{
+ unsigned int i;
+ uint8_t dest[SMALL_BUFFER_SIZE + ALIGNMENT_UNIT];
+ uint8_t src[SMALL_BUFFER_SIZE + ALIGNMENT_UNIT];
+ void * ret;
+
+ /* Setup buffers */
+ for (i = 0; i < SMALL_BUFFER_SIZE + ALIGNMENT_UNIT; i++) {
+ dest[i] = 0;
+ src[i] = (uint8_t) rte_rand();
+ }
+
+ /* Do the copy */
+ ret = rte_memcpy(dest + off_dst, src + off_src, size);
+ if (ret != (dest + off_dst)) {
+ printf("rte_memcpy() returned %p, not %p\n",
+ ret, dest + off_dst);
+ }
+
+ /* Check nothing before offset is affected */
+ for (i = 0; i < off_dst; i++) {
+ if (dest[i] != 0) {
+ printf("rte_memcpy() failed for %u bytes (offsets=%u,%u): "
+ "[modified before start of dst].\n",
+ (unsigned)size, off_src, off_dst);
+ return -1;
+ }
+ }
+
+ /* Check everything was copied */
+ for (i = 0; i < size; i++) {
+ if (dest[i + off_dst] != src[i + off_src]) {
+ printf("rte_memcpy() failed for %u bytes (offsets=%u,%u): "
+ "[didn't copy byte %u].\n",
+ (unsigned)size, off_src, off_dst, i);
+ return -1;
+ }
+ }
+
+ /* Check nothing after copy was affected */
+ for (i = size; i < SMALL_BUFFER_SIZE; i++) {
+ if (dest[i + off_dst] != 0) {
+ printf("rte_memcpy() failed for %u bytes (offsets=%u,%u): "
+ "[copied too many].\n",
+ (unsigned)size, off_src, off_dst);
+ return -1;
+ }
+ }
+ return 0;
+}
+
+/*
+ * Check functionality for various buffer sizes and data offsets/alignments.
+ */
+static int
+func_test(void)
+{
+ unsigned int off_src, off_dst, i;
+ unsigned int num_buf_sizes = sizeof(buf_sizes) / sizeof(buf_sizes[0]);
+ int ret;
+
+ for (off_src = 0; off_src < ALIGNMENT_UNIT; off_src++) {
+ for (off_dst = 0; off_dst < ALIGNMENT_UNIT; off_dst++) {
+ for (i = 0; i < num_buf_sizes; i++) {
+ ret = test_single_memcpy(off_src, off_dst,
+ buf_sizes[i]);
+ if (ret != 0)
+ return -1;
+ }
+ }
+ }
+ return 0;
+}
+
+static int
+test_memcpy(void)
+{
+ int ret;
+
+ ret = func_test();
+ if (ret != 0)
+ return -1;
+ return 0;
+}
+
+static struct test_command memcpy_cmd = {
+ .command = "memcpy_autotest",
+ .callback = test_memcpy,
+};
+REGISTER_TEST_COMMAND(memcpy_cmd);
Code Review / deb_dpdk.git / blobdiff