[dpdk-dev,v1,2/2] Test cases for rte_memcmp functions

diff --git a/app/test/Makefile b/app/test/Makefile
index ec33e1a..f6ecaa9 100644
--- a/app/test/Makefile
+++ b/app/test/Makefile
@@ -82,6 +82,9 @@  SRCS-y += test_logs.c
 SRCS-y += test_memcpy.c
 SRCS-y += test_memcpy_perf.c
 
+SRCS-y += test_memcmp.c
+SRCS-y += test_memcmp_perf.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
@@ -160,14 +163,40 @@  CFLAGS += $(WERROR_FLAGS)
 
 CFLAGS += -D_GNU_SOURCE
 
-# Disable VTA for memcpy test
+# Disable VTA for memcpy and memcmp tests
 ifeq ($(CC), gcc)
 ifeq ($(shell test $(GCC_VERSION) -ge 44 && echo 1), 1)
 CFLAGS_test_memcpy.o += -fno-var-tracking-assignments
 CFLAGS_test_memcpy_perf.o += -fno-var-tracking-assignments
+
+CFLAGS_test_memcmp.o += -fno-var-tracking-assignments
+CFLAGS_test_memcmp_perf.o += -fno-var-tracking-assignments
+
 endif
 endif
 
+CMP_AVX2_SUPPORT=$(shell $(CC) -march=core-avx2 -dM -E - </dev/null 2>&1 | \
+	grep -q AVX2 && echo 1)
+
+ifeq ($(CMP_AVX2_SUPPORT), 1)
+	ifeq ($(CC), icc)
+		CFLAGS_test_memcmp.o += -march=core-avx2
+		CFLAGS_test_memcmp_perf.o += -march=core-avx2
+	else
+		CFLAGS_test_memcmp.o += -mavx2
+		CFLAGS_test_memcmp_perf.o += -mavx2
+	endif
+else
+	ifeq ($(CC), icc)
+		CFLAGS_test_memcmp.o += -march=core-sse4.1
+		CFLAGS_test_memcmp_perf.o += -march=core-sse4.1
+	else
+		CFLAGS_test_memcmp.o += -msse4.1
+		CFLAGS_test_memcmp_perf.o += -msse4.1
+	endif
+endif
+
+
 # this application needs libraries first
 DEPDIRS-y += lib drivers
 
diff --git a/app/test/autotest_data.py b/app/test/autotest_data.py
index 6f34d6b..5113327 100644
--- a/app/test/autotest_data.py
+++ b/app/test/autotest_data.py
@@ -186,6 +186,12 @@  parallel_test_group_list = [
 		 "Report" :	None,
 		},
 		{
+		 "Name" :	"Memcmp autotest",
+		 "Command" : 	"memcmp_autotest",
+		 "Func" :	default_autotest,
+		 "Report" :	None,
+		},
+		{
 		 "Name" :	"Memzone autotest",
 		 "Command" : 	"memzone_autotest",
 		 "Func" :	default_autotest,
@@ -398,6 +404,19 @@  non_parallel_test_group_list = [
 	]
 },
 {
+	"Prefix":	"memcmp_perf",
+	"Memory" :	per_sockets(512),
+	"Tests" :
+	[
+		{
+		 "Name" :	"Memcmp performance autotest",
+		 "Command" : 	"memcmp_perf_autotest",
+		 "Func" :	default_autotest,
+		 "Report" :	None,
+		},
+	]
+},
+{
 	"Prefix":	"hash_perf",
 	"Memory" :	per_sockets(512),
 	"Tests" :
diff --git a/app/test/test_memcmp.c b/app/test/test_memcmp.c
new file mode 100644
index 0000000..e3b0bf7
--- /dev/null
+++ b/app/test/test_memcmp.c
@@ -0,0 +1,250 @@ 
+/*-
+ *   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 <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <sys/queue.h>
+
+#include <rte_common.h>
+#include <rte_malloc.h>
+#include <rte_cycles.h>
+#include <rte_random.h>
+#include <rte_memory.h>
+#include <rte_eal.h>
+#include <rte_memcmp.h>
+
+#include "test.h"
+
+/*******************************************************************************
+ * Memcmp function performance test configuration section.
+ * Each performance test will be performed HASHTEST_ITERATIONS times.
+ *
+ * The five arrays below control what tests are performed. Every combination
+ * from the array entries is tested.
+ */
+static size_t memcmp_sizes[] = {
+	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, 16384
+};
+
+/******************************************************************************/
+
+#define RTE_MEMCMP_LENGTH_MAX 16384
+
+/*
+ * Test a memcmp equal function.
+ */
+static int run_memcmp_eq_func_test(uint32_t len)
+{
+	uint32_t i, rc;
+
+	uint8_t *volatile key_1 = NULL;
+	uint8_t *volatile key_2 = NULL;
+
+	key_1 = rte_zmalloc("memcmp key_1", len * sizeof(uint8_t), 16);
+	if (key_1 == NULL) {
+		printf("\nkey_1 is null\n");
+		return -1;
+	}
+
+	key_2 = rte_zmalloc("memcmp key_2", len * sizeof(uint8_t), 16);
+	if (key_2 == NULL) {
+		rte_free(key_1);
+		printf("\nkey_2 is null\n");
+		return -1;
+	}
+
+	for (i = 0; i < len; i++)
+		key_1[i] = 1;
+
+	for (i = 0; i < len; i++)
+		key_2[i] = 1;
+
+	rc = rte_memcmp(key_1, key_2, len);
+	rte_free(key_1);
+	rte_free(key_2);
+
+	return rc;
+}
+
+/*
+ * Test memcmp equal functions.
+ */
+static int run_memcmp_eq_func_tests(void)
+{
+	unsigned i;
+
+	for (i = 0;
+	     i < sizeof(memcmp_sizes) / sizeof(memcmp_sizes[0]);
+	     i++) {
+		if (run_memcmp_eq_func_test(memcmp_sizes[i])) {
+			printf("Comparing equal %zd bytes failed\n", memcmp_sizes[i]);
+			return 1;
+		}
+	}
+	printf("RTE memcmp for equality successful\n");
+	return 0;
+}
+
+/*
+ * Test a memcmp less than function.
+ */
+static int run_memcmp_lt_func_test(uint32_t len)
+{
+	uint32_t i, rc;
+
+	uint8_t *volatile key_1 = NULL;
+	uint8_t *volatile key_2 = NULL;
+
+	key_1 = rte_zmalloc("memcmp key_1", len * sizeof(uint8_t), 16);
+	if (key_1 == NULL)
+		return -1;
+
+	key_2 = rte_zmalloc("memcmp key_2", len * sizeof(uint8_t), 16);
+	if (key_2 == NULL) {
+		rte_free(key_1);
+		return -1;
+	}
+
+	for (i = 0; i < len; i++)
+		key_1[i] = 1;
+
+	for (i = 0; i < len; i++)
+		key_2[i] = 2;
+
+	rc = rte_memcmp(key_1, key_2, len);
+	rte_free(key_1);
+	rte_free(key_2);
+
+	return rc;
+}
+
+/*
+ * Test memcmp less than functions.
+ */
+static int run_memcmp_lt_func_tests(void)
+{
+	unsigned i;
+
+	for (i = 0;
+	     i < sizeof(memcmp_sizes) / sizeof(memcmp_sizes[0]);
+	     i++) {
+		if (!(run_memcmp_lt_func_test(memcmp_sizes[i]) < 0)) {
+			printf("Comparing less than for %zd bytes failed\n", memcmp_sizes[i]);
+			return 1;
+		}
+	}
+	printf("RTE memcmp for less than successful\n");
+	return 0;
+}
+
+/*
+ * Test a memcmp greater than function.
+ */
+static int run_memcmp_gt_func_test(uint32_t len)
+{
+	uint32_t i, rc;
+
+	uint8_t *volatile key_1 = NULL;
+	uint8_t *volatile key_2 = NULL;
+
+	key_1 = rte_zmalloc("memcmp key_1", len * sizeof(uint8_t), 16);
+	if (key_1 == NULL)
+		return -1;
+
+	key_2 = rte_zmalloc("memcmp key_2", len * sizeof(uint8_t), 16);
+	if (key_2 == NULL) {
+		rte_free(key_1);
+		return -1;
+	}
+
+	for (i = 0; i < len; i++)
+		key_1[i] = 2;
+
+	for (i = 0; i < len; i++)
+		key_2[i] = 1;
+
+	rc = rte_memcmp(key_1, key_2, len);
+	rte_free(key_1);
+	rte_free(key_2);
+
+	return rc;
+}
+
+/*
+ * Test memcmp less than functions.
+ */
+static int run_memcmp_gt_func_tests(void)
+{
+	unsigned i;
+
+	for (i = 0;
+	     i < sizeof(memcmp_sizes) / sizeof(memcmp_sizes[0]);
+	     i++) {
+		if (!(run_memcmp_gt_func_test(memcmp_sizes[i]) > 0)) {
+			printf("Comparing greater than for %zd bytes failed\n", memcmp_sizes[i]);
+			return 1;
+		}
+	}
+	printf("RTE memcmp for greater than successful\n");
+	return 0;
+}
+
+/*
+ * Do all unit and performance tests.
+ */
+static int
+test_memcmp(void)
+{
+	if (run_memcmp_eq_func_tests())
+		return -1;
+
+	if (run_memcmp_gt_func_tests())
+		return -1;
+
+	if (run_memcmp_lt_func_tests())
+		return -1;
+
+	return 0;
+}
+
+static struct test_command memcmp_cmd = {
+	.command = "memcmp_autotest",
+	.callback = test_memcmp,
+};
+REGISTER_TEST_COMMAND(memcmp_cmd);
diff --git a/app/test/test_memcmp_perf.c b/app/test/test_memcmp_perf.c
new file mode 100644
index 0000000..4c0f4d9
--- /dev/null
+++ b/app/test/test_memcmp_perf.c
@@ -0,0 +1,396 @@ 
+/*-
+ *   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 <stdio.h>
+#include <stdint.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <sys/queue.h>
+#include <sys/times.h>
+
+#include <rte_common.h>
+#include <rte_malloc.h>
+#include <rte_cycles.h>
+#include <rte_random.h>
+#include <rte_memory.h>
+#include <rte_memcmp.h>
+
+#include "test.h"
+
+/*******************************************************************************
+ * Memcmp function performance test configuration section. Each performance test
+ * will be performed MEMCMP_ITERATIONS times.
+ *
+ * The five arrays below control what tests are performed. Every combination
+ * from the array entries is tested.
+ */
+#define MEMCMP_ITERATIONS (500 * 500 * 500)
+
+static size_t memcmp_sizes[] = {
+	2, 5, 8, 9, 15, 16, 17, 31, 32, 33, 63, 64, 65, 127, 128,
+	129, 191, 192, 193, 255, 256, 257, 319, 320, 321, 383, 384,
+	385, 447, 448, 449, 511, 512, 513, 767, 768, 769, 1023, 1024,
+	1025, 1522, 1536, 1600, 2048, 2560, 3072, 3584, 4096, 4608,
+	5632, 6144, 6656, 7168, 7680, 8192, 16834
+};
+
+static size_t memcmp_lt_gt_sizes[] = {
+	1, 8, 15, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096, 8192, 16384
+};
+
+/******************************************************************************/
+
+static int
+run_single_memcmp_eq_perf_test(uint32_t len, int func_type, uint64_t iterations)
+{
+	uint32_t i, j;
+
+	double begin = 0, end = 0;
+
+	uint8_t *volatile key_1 = NULL;
+	uint8_t *volatile key_2 = NULL;
+	int rc = 0;
+
+	key_1 = rte_zmalloc("memcmp key_1", len * sizeof(uint8_t), 16);
+	if (key_1 == NULL) {
+		printf("\nkey_1 mem alloc failure\n");
+		return -1;
+	}
+
+	key_2 = rte_zmalloc("memcmp key_2", len * sizeof(uint8_t), 16);
+	if (key_2 == NULL) {
+		printf("\nkey_2 mem alloc failure\n");
+		rte_free(key_2);
+		return -1;
+	}
+
+	/* Prepare inputs for the current iteration */
+	for (j = 0; j < len; j++)
+		key_1[j] = key_2[j] = j / 64;
+
+	begin = rte_rdtsc();
+
+	/* Perform operation, and measure time it takes */
+	for (i = 0; i < iterations; i++) {
+
+		switch (func_type) {
+		case 1:
+			rc += rte_memcmp(key_1, key_2, len);
+			break;
+		case 2:
+			rc += memcmp(key_1, key_2, len);
+			break;
+		default:
+			break;
+		}
+
+	}
+
+	end = rte_rdtsc() - begin;
+
+	printf(" *** %10i, %10.4f ***\n", len, (double)(end/iterations));
+
+	rte_free(key_1);
+	rte_free(key_2);
+
+	return rc;
+}
+
+/*
+ * Run all memcmp table performance tests.
+ */
+static int run_all_memcmp_eq_perf_tests(void)
+{
+	unsigned i;
+
+	printf(" *** RTE memcmp equal performance test results ***\n");
+	printf(" *** Length (bytes), Ticks/Op. ***\n");
+
+	/* Loop through every combination of test parameters */
+	for (i = 0;
+	     i < sizeof(memcmp_sizes) / sizeof(memcmp_sizes[0]);
+	     i++) {
+		/* Perform test */
+		if (run_single_memcmp_eq_perf_test(memcmp_sizes[i], 1,
+						MEMCMP_ITERATIONS) != 0)
+			return -1;
+	}
+
+	printf(" *** memcmp equal performance test results ***\n");
+	printf(" *** Length (bytes), Ticks/Op. ***\n");
+
+	/* Loop through every combination of test parameters */
+	for (i = 0;
+	     i < sizeof(memcmp_sizes) / sizeof(memcmp_sizes[0]);
+	     i++) {
+		/* Perform test */
+		if (run_single_memcmp_eq_perf_test(memcmp_sizes[i], 2,
+						MEMCMP_ITERATIONS) != 0)
+			return -1;
+	}
+	return 0;
+}
+
+static int
+run_single_memcmp_lt_perf_test(uint32_t len, int func_type,
+					uint64_t iterations)
+{
+	uint32_t i, j;
+
+	double begin = 0, end = 0;
+
+	uint8_t *volatile key_1 = NULL;
+	uint8_t *volatile key_2 = NULL;
+	int rc;
+
+	key_1 = rte_zmalloc("memcmp key_1", len * sizeof(uint8_t), 16);
+	if (key_1 == NULL) {
+		printf("\nKey_1 lt mem alloc failure\n");
+		return -1;
+	}
+
+	key_2 = rte_zmalloc("memcmp key_2", len * sizeof(uint8_t), 16);
+	if (key_2 == NULL) {
+		printf("\nKey_2 lt mem alloc failure\n");
+		rte_free(key_1);
+		return -1;
+	}
+
+	/* Prepare inputs for the current iteration */
+	for (j = 0; j < len; j++)
+		key_1[j] = 1;
+
+	for (j = 0; j < len; j++)
+		key_2[j] = 1;
+
+	/* Perform operation, and measure time it takes */
+	for (i = 0; i < iterations; i++) {
+
+		key_2[i % len] = 2;
+
+		switch (func_type) {
+		case 1:
+			begin = rte_rdtsc();
+			rc = rte_memcmp(key_1, key_2, len);
+			end += rte_rdtsc() - begin;
+			break;
+		case 2:
+			begin = rte_rdtsc();
+			rc = memcmp(key_1, key_2, len);
+			end += rte_rdtsc() - begin;
+			break;
+		default:
+			break;
+		}
+
+		key_2[i % len] = 1;
+
+		if (!(rc < 0)) {
+			printf("\nrc %d i %d\n", rc, i);
+			return -1;
+		}
+	}
+
+	printf(" *** %10i, %10.4f ***\n", len, (double)(end/iterations));
+
+	rte_free(key_1);
+	rte_free(key_2);
+
+	return 0;
+}
+
+/*
+ * Run all memcmp table performance tests.
+ */
+static int run_all_memcmp_lt_perf_tests(void)
+{
+	unsigned i;
+
+	printf(" *** RTE memcmp less than performance test results ***\n");
+	printf(" *** Length (bytes), Ticks/Op. ***\n");
+
+	/* Loop through every combination of test parameters */
+	for (i = 0;
+	     i < sizeof(memcmp_lt_gt_sizes) / sizeof(memcmp_lt_gt_sizes[0]);
+	     i++) {
+		/* Perform test */
+		if (run_single_memcmp_lt_perf_test(memcmp_lt_gt_sizes[i], 1,
+						MEMCMP_ITERATIONS) != 0)
+			return -1;
+	}
+
+	printf(" *** memcmp less than performance test results ***\n");
+	printf(" *** Length (bytes), Ticks/Op. ***\n");
+
+	/* Loop through every combination of test parameters */
+	for (i = 0;
+	     i < sizeof(memcmp_lt_gt_sizes) / sizeof(memcmp_lt_gt_sizes[0]);
+	     i++) {
+		/* Perform test */
+		if (run_single_memcmp_lt_perf_test(memcmp_lt_gt_sizes[i], 2,
+						MEMCMP_ITERATIONS) != 0)
+			return -1;
+	}
+	return 0;
+}
+
+static int
+run_single_memcmp_gt_perf_test(uint32_t len, int func_type,
+					uint64_t iterations)
+{
+	uint32_t i, j;
+
+	double begin = 0, end = 0;
+
+	uint8_t *volatile key_1 = NULL;
+	uint8_t *volatile key_2 = NULL;
+	int rc;
+
+	key_1 = rte_zmalloc("memcmp key_1", len * sizeof(uint8_t), 16);
+	if (key_1 == NULL) {
+		printf("\nkey_1 gt mem alloc failure\n");
+		return -1;
+	}
+
+	key_2 = rte_zmalloc("memcmp key_2", len * sizeof(uint8_t), 16);
+	if (key_2 == NULL) {
+		printf("\nkey_2 gt mem alloc failure\n");
+		rte_free(key_1);
+		return -1;
+	}
+
+	/* Prepare inputs for the current iteration */
+	for (j = 0; j < len; j++)
+		key_1[j] = 1;
+
+	for (j = 0; j < len; j++)
+		key_2[j] = 1;
+
+	/* Perform operation, and measure time it takes */
+	for (i = 0; i < iterations; i++) {
+		key_1[i % len] = 2;
+
+		switch (func_type) {
+		case 1:
+			begin = rte_rdtsc();
+			rc = rte_memcmp(key_1, key_2, len);
+			end += rte_rdtsc() - begin;
+			break;
+		case 2:
+			begin = rte_rdtsc();
+			rc = memcmp(key_1, key_2, len);
+			end += rte_rdtsc() - begin;
+			break;
+		default:
+			break;
+		}
+
+		key_1[i % len] = 1;
+
+		if (!(rc > 0)) {
+			printf("\nrc %d i %d\n", rc, i);
+			for (i = 0; i < len; i++)
+				printf("\nkey_1 %d key_2 %d mod %d\n", key_1[i], key_2[i], (i % len));
+			return -1;
+		}
+	}
+
+	printf(" *** %10i, %10.4f ***\n", len, (double)(end/iterations));
+
+	rte_free(key_1);
+	rte_free(key_2);
+
+	return 0;
+}
+
+/*
+ * Run all memcmp table performance tests.
+ */
+static int run_all_memcmp_gt_perf_tests(void)
+{
+	unsigned i;
+
+	printf(" *** RTE memcmp greater than performance test results ***\n");
+	printf(" *** Length (bytes), Ticks/Op. ***\n");
+
+	/* Loop through every combination of test parameters */
+	for (i = 0;
+	     i < sizeof(memcmp_lt_gt_sizes) / sizeof(memcmp_lt_gt_sizes[0]);
+	     i++) {
+		/* Perform test */
+		if (run_single_memcmp_gt_perf_test(memcmp_lt_gt_sizes[i], 1,
+						MEMCMP_ITERATIONS) != 0)
+			return -1;
+	}
+
+	printf(" *** memcmp greater than performance test results ***\n");
+	printf(" *** Length (bytes), Ticks/Op. ***\n");
+
+	/* Loop through every combination of test parameters */
+	for (i = 0;
+	     i < sizeof(memcmp_lt_gt_sizes) / sizeof(memcmp_lt_gt_sizes[0]);
+	     i++) {
+		/* Perform test */
+		if (run_single_memcmp_gt_perf_test(memcmp_lt_gt_sizes[i], 2,
+						MEMCMP_ITERATIONS) != 0)
+			return -1;
+	}
+	return 0;
+}
+
+/*
+ * Do all performance tests.
+ */
+static int
+test_memcmp_perf(void)
+{
+	if (run_all_memcmp_eq_perf_tests() != 0)
+		return -1;
+
+	if (run_all_memcmp_gt_perf_tests() != 0)
+		return -1;
+
+	if (run_all_memcmp_lt_perf_tests() != 0)
+		return -1;
+
+
+	return 0;
+}
+
+static struct test_command memcmp_perf_cmd = {
+	.command = "memcmp_perf_autotest",
+	.callback = test_memcmp_perf,
+};
+REGISTER_TEST_COMMAND(memcmp_perf_cmd);