[dpdk-dev] [PATCH v2 2/4] app/test: add functional autotest for rte_memset

[Zhiyong Yang]

The file implements the functional autotest for rte_memset, which
validates the new function rte_memset whether to work in a right
way. The implementation of test_memcpy.c is used as a reference.

Usage:
step 1: run ./x86_64-native-linuxapp-gcc/app/test
step 2: run command memset_autotest at the run time.

Signed-off-by: Zhiyong Yang <zhiyong.yang at intel.com>
---
 app/test/Makefile      |   2 +
 app/test/test_memset.c | 158 +++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 160 insertions(+)
 create mode 100644 app/test/test_memset.c

diff --git a/app/test/Makefile b/app/test/Makefile
index 5be023a..82da3f3 100644
--- a/app/test/Makefile
+++ b/app/test/Makefile
@@ -123,6 +123,8 @@ SRCS-y += test_logs.c
 SRCS-y += test_memcpy.c
 SRCS-y += test_memcpy_perf.c
 
+SRCS-y += test_memset.c
+
 SRCS-$(CONFIG_RTE_LIBRTE_HASH) += test_hash.c
 SRCS-$(CONFIG_RTE_LIBRTE_HASH) += test_thash.c
 SRCS-$(CONFIG_RTE_LIBRTE_HASH) += test_hash_perf.c
diff --git a/app/test/test_memset.c b/app/test/test_memset.c
new file mode 100644
index 0000000..c9020bf
--- /dev/null
+++ b/app/test/test_memset.c
@@ -0,0 +1,158 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2016 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_random.h>
+#include <rte_memset.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
+#define MAX_INT8 127
+#define MIN_INT8 -128
+/* 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 BUFFER_SIZE       8192
+#else /* TEST_VALUE_RANGE != 0 */
+static size_t buf_sizes[TEST_VALUE_RANGE];
+#define BUFFER_SIZE       TEST_VALUE_RANGE
+#endif /* TEST_VALUE_RANGE == 0 */
+
+/* Data is aligned on this many bytes (power of 2) */
+#define ALIGNMENT_UNIT 32
+
+/*
+ * Create two buffers, and initialize the one as the reference buffer with
+ * random values. Another(dest_buff) is assigned by the reference buffer.
+ * Set some memory area of dest_buff by using ch and then compare to see
+ * if the rte_memset is successful. The bytes outside the setted area are
+ * also checked to make sure they are not changed.
+ */
+static int
+test_single_memset(unsigned int off_dst, int ch, size_t size)
+{
+	unsigned int i;
+	uint8_t dest_buff[BUFFER_SIZE + ALIGNMENT_UNIT];
+	uint8_t ref_buff[BUFFER_SIZE + ALIGNMENT_UNIT];
+	void *ret;
+
+	/* Setup buffers */
+	for (i = 0; i < BUFFER_SIZE + ALIGNMENT_UNIT; i++) {
+		ref_buff[i] = (uint8_t) rte_rand();
+		dest_buff[i] = ref_buff[i];
+	}
+	/* Do the rte_memset */
+	ret = rte_memset(dest_buff + off_dst, ch, size);
+	if (ret != (dest_buff + off_dst)) {
+		printf("rte_memset() returned %p, not %p\n",
+		       ret, dest_buff + off_dst);
+	}
+	/* Check nothing before offset was affected */
+	for (i = 0; i < off_dst; i++) {
+		if (dest_buff[i] != ref_buff[i]) {
+			printf("rte_memset() failed for %u bytes (offsets=%u): \
+			       [modified before start of dst].\n",
+			       (unsigned int)size, off_dst);
+			return -1;
+		}
+	}
+	/* Check every byte was setted */
+	for (i = 0; i < size; i++) {
+		if (dest_buff[i + off_dst] != (uint8_t)ch) {
+			printf("rte_memset() failed for %u bytes (offsets=%u): \
+			       [didn't memset byte %u].\n",
+			       (unsigned int)size, off_dst, i);
+			return -1;
+		}
+	}
+	/* Check nothing after memset was affected */
+	for (i = off_dst + size; i < BUFFER_SIZE + ALIGNMENT_UNIT; i++) {
+		if (dest_buff[i] != ref_buff[i]) {
+			printf("rte_memset() failed for %u bytes (offsets=%u): \
+			      [memset too many].\n",
+			       (unsigned int)size, off_dst);
+			return -1;
+		}
+	}
+	return 0;
+}
+
+/*
+ * Check functionality for various buffer sizes and data offsets/alignments.
+ */
+static int
+func_test(void)
+{
+	unsigned int off_dst, i;
+	unsigned int num_buf_sizes = sizeof(buf_sizes) / sizeof(buf_sizes[0]);
+	int ret;
+	int j;
+
+	for (j = MIN_INT8; j <= MAX_INT8; j++) {
+		for (off_dst = 0; off_dst < ALIGNMENT_UNIT; off_dst++) {
+			for (i = 0; i < num_buf_sizes; i++) {
+				ret = test_single_memset(off_dst, j,
+							 buf_sizes[i]);
+				if (ret != 0)
+					return -1;
+			}
+		}
+	}
+	return 0;
+}
+
+static int
+test_memset(void)
+{
+	int ret;
+
+	ret = func_test();
+	if (ret != 0)
+		return -1;
+	return 0;
+}
+
+REGISTER_TEST_COMMAND(memset_autotest, test_memset);
-- 
2.7.4