X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=app%2Ftest%2Ftest_ring.c;fp=app%2Ftest%2Ftest_ring.c;h=0d7523ed49df0d3a1a048a9a005448c39fbe1e3b;hb=97f17497d162afdb82c8704bf097f0fee3724b2e;hp=0000000000000000000000000000000000000000;hpb=e04be89c2409570e0055b2cda60bd11395bb93b0;p=deb_dpdk.git

diff --git a/app/test/test_ring.c b/app/test/test_ring.c
new file mode 100644
index 00000000..0d7523ed
--- /dev/null
+++ b/app/test/test_ring.c
@@ -0,0 +1,1387 @@
+/*-
+ *   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 <string.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <errno.h>
+#include <sys/queue.h>
+
+#include <rte_common.h>
+#include <rte_log.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_launch.h>
+#include <rte_cycles.h>
+#include <rte_eal.h>
+#include <rte_per_lcore.h>
+#include <rte_lcore.h>
+#include <rte_atomic.h>
+#include <rte_branch_prediction.h>
+#include <rte_malloc.h>
+#include <rte_ring.h>
+#include <rte_random.h>
+#include <rte_common.h>
+#include <rte_errno.h>
+#include <rte_hexdump.h>
+
+#include "test.h"
+
+/*
+ * Ring
+ * ====
+ *
+ * #. Basic tests: done on one core:
+ *
+ *    - Using single producer/single consumer functions:
+ *
+ *      - Enqueue one object, two objects, MAX_BULK objects
+ *      - Dequeue one object, two objects, MAX_BULK objects
+ *      - Check that dequeued pointers are correct
+ *
+ *    - Using multi producers/multi consumers functions:
+ *
+ *      - Enqueue one object, two objects, MAX_BULK objects
+ *      - Dequeue one object, two objects, MAX_BULK objects
+ *      - Check that dequeued pointers are correct
+ *
+ *    - Test watermark and default bulk enqueue/dequeue:
+ *
+ *      - Set watermark
+ *      - Set default bulk value
+ *      - Enqueue objects, check that -EDQUOT is returned when
+ *        watermark is exceeded
+ *      - Check that dequeued pointers are correct
+ *
+ * #. Check live watermark change
+ *
+ *    - Start a loop on another lcore that will enqueue and dequeue
+ *      objects in a ring. It will monitor the value of watermark.
+ *    - At the same time, change the watermark on the master lcore.
+ *    - The slave lcore will check that watermark changes from 16 to 32.
+ *
+ * #. Performance tests.
+ *
+ * Tests done in test_ring_perf.c
+ */
+
+#define RING_SIZE 4096
+#define MAX_BULK 32
+#define N 65536
+#define TIME_S 5
+
+static rte_atomic32_t synchro;
+
+static struct rte_ring *r;
+
+#define	TEST_RING_VERIFY(exp)						\
+	if (!(exp)) {							\
+		printf("error at %s:%d\tcondition " #exp " failed\n",	\
+		    __func__, __LINE__);				\
+		rte_ring_dump(stdout, r);				\
+		return -1;						\
+	}
+
+#define	TEST_RING_FULL_EMTPY_ITER	8
+
+static int
+check_live_watermark_change(__attribute__((unused)) void *dummy)
+{
+	uint64_t hz = rte_get_timer_hz();
+	void *obj_table[MAX_BULK];
+	unsigned watermark, watermark_old = 16;
+	uint64_t cur_time, end_time;
+	int64_t diff = 0;
+	int i, ret;
+	unsigned count = 4;
+
+	/* init the object table */
+	memset(obj_table, 0, sizeof(obj_table));
+	end_time = rte_get_timer_cycles() + (hz * 2);
+
+	/* check that bulk and watermark are 4 and 32 (respectively) */
+	while (diff >= 0) {
+
+		/* add in ring until we reach watermark */
+		ret = 0;
+		for (i = 0; i < 16; i ++) {
+			if (ret != 0)
+				break;
+			ret = rte_ring_enqueue_bulk(r, obj_table, count);
+		}
+
+		if (ret != -EDQUOT) {
+			printf("Cannot enqueue objects, or watermark not "
+			       "reached (ret=%d)\n", ret);
+			return -1;
+		}
+
+		/* read watermark, the only change allowed is from 16 to 32 */
+		watermark = r->prod.watermark;
+		if (watermark != watermark_old &&
+		    (watermark_old != 16 || watermark != 32)) {
+			printf("Bad watermark change %u -> %u\n", watermark_old,
+			       watermark);
+			return -1;
+		}
+		watermark_old = watermark;
+
+		/* dequeue objects from ring */
+		while (i--) {
+			ret = rte_ring_dequeue_bulk(r, obj_table, count);
+			if (ret != 0) {
+				printf("Cannot dequeue (ret=%d)\n", ret);
+				return -1;
+			}
+		}
+
+		cur_time = rte_get_timer_cycles();
+		diff = end_time - cur_time;
+	}
+
+	if (watermark_old != 32 ) {
+		printf(" watermark was not updated (wm=%u)\n",
+		       watermark_old);
+		return -1;
+	}
+
+	return 0;
+}
+
+static int
+test_live_watermark_change(void)
+{
+	unsigned lcore_id = rte_lcore_id();
+	unsigned lcore_id2 = rte_get_next_lcore(lcore_id, 0, 1);
+
+	printf("Test watermark live modification\n");
+	rte_ring_set_water_mark(r, 16);
+
+	/* launch a thread that will enqueue and dequeue, checking
+	 * watermark and quota */
+	rte_eal_remote_launch(check_live_watermark_change, NULL, lcore_id2);
+
+	rte_delay_ms(1000);
+	rte_ring_set_water_mark(r, 32);
+	rte_delay_ms(1000);
+
+	if (rte_eal_wait_lcore(lcore_id2) < 0)
+		return -1;
+
+	return 0;
+}
+
+/* Test for catch on invalid watermark values */
+static int
+test_set_watermark( void ){
+	unsigned count;
+	int setwm;
+
+	struct rte_ring *r = rte_ring_lookup("test_ring_basic_ex");
+	if(r == NULL){
+		printf( " ring lookup failed\n" );
+		goto error;
+	}
+	count = r->prod.size*2;
+	setwm = rte_ring_set_water_mark(r, count);
+	if (setwm != -EINVAL){
+		printf("Test failed to detect invalid watermark count value\n");
+		goto error;
+	}
+
+	count = 0;
+	rte_ring_set_water_mark(r, count);
+	if (r->prod.watermark != r->prod.size) {
+		printf("Test failed to detect invalid watermark count value\n");
+		goto error;
+	}
+	return 0;
+
+error:
+	return -1;
+}
+
+/*
+ * helper routine for test_ring_basic
+ */
+static int
+test_ring_basic_full_empty(void * const src[], void *dst[])
+{
+	unsigned i, rand;
+	const unsigned rsz = RING_SIZE - 1;
+
+	printf("Basic full/empty test\n");
+
+	for (i = 0; TEST_RING_FULL_EMTPY_ITER != i; i++) {
+
+		/* random shift in the ring */
+		rand = RTE_MAX(rte_rand() % RING_SIZE, 1UL);
+		printf("%s: iteration %u, random shift: %u;\n",
+		    __func__, i, rand);
+		TEST_RING_VERIFY(-ENOBUFS != rte_ring_enqueue_bulk(r, src,
+		    rand));
+		TEST_RING_VERIFY(0 == rte_ring_dequeue_bulk(r, dst, rand));
+
+		/* fill the ring */
+		TEST_RING_VERIFY(-ENOBUFS != rte_ring_enqueue_bulk(r, src,
+		    rsz));
+		TEST_RING_VERIFY(0 == rte_ring_free_count(r));
+		TEST_RING_VERIFY(rsz == rte_ring_count(r));
+		TEST_RING_VERIFY(rte_ring_full(r));
+		TEST_RING_VERIFY(0 == rte_ring_empty(r));
+
+		/* empty the ring */
+		TEST_RING_VERIFY(0 == rte_ring_dequeue_bulk(r, dst, rsz));
+		TEST_RING_VERIFY(rsz == rte_ring_free_count(r));
+		TEST_RING_VERIFY(0 == rte_ring_count(r));
+		TEST_RING_VERIFY(0 == rte_ring_full(r));
+		TEST_RING_VERIFY(rte_ring_empty(r));
+
+		/* check data */
+		TEST_RING_VERIFY(0 == memcmp(src, dst, rsz));
+		rte_ring_dump(stdout, r);
+	}
+	return 0;
+}
+
+static int
+test_ring_basic(void)
+{
+	void **src = NULL, **cur_src = NULL, **dst = NULL, **cur_dst = NULL;
+	int ret;
+	unsigned i, num_elems;
+
+	/* alloc dummy object pointers */
+	src = malloc(RING_SIZE*2*sizeof(void *));
+	if (src == NULL)
+		goto fail;
+
+	for (i = 0; i < RING_SIZE*2 ; i++) {
+		src[i] = (void *)(unsigned long)i;
+	}
+	cur_src = src;
+
+	/* alloc some room for copied objects */
+	dst = malloc(RING_SIZE*2*sizeof(void *));
+	if (dst == NULL)
+		goto fail;
+
+	memset(dst, 0, RING_SIZE*2*sizeof(void *));
+	cur_dst = dst;
+
+	printf("enqueue 1 obj\n");
+	ret = rte_ring_sp_enqueue_bulk(r, cur_src, 1);
+	cur_src += 1;
+	if (ret != 0)
+		goto fail;
+
+	printf("enqueue 2 objs\n");
+	ret = rte_ring_sp_enqueue_bulk(r, cur_src, 2);
+	cur_src += 2;
+	if (ret != 0)
+		goto fail;
+
+	printf("enqueue MAX_BULK objs\n");
+	ret = rte_ring_sp_enqueue_bulk(r, cur_src, MAX_BULK);
+	cur_src += MAX_BULK;
+	if (ret != 0)
+		goto fail;
+
+	printf("dequeue 1 obj\n");
+	ret = rte_ring_sc_dequeue_bulk(r, cur_dst, 1);
+	cur_dst += 1;
+	if (ret != 0)
+		goto fail;
+
+	printf("dequeue 2 objs\n");
+	ret = rte_ring_sc_dequeue_bulk(r, cur_dst, 2);
+	cur_dst += 2;
+	if (ret != 0)
+		goto fail;
+
+	printf("dequeue MAX_BULK objs\n");
+	ret = rte_ring_sc_dequeue_bulk(r, cur_dst, MAX_BULK);
+	cur_dst += MAX_BULK;
+	if (ret != 0)
+		goto fail;
+
+	/* check data */
+	if (memcmp(src, dst, cur_dst - dst)) {
+		rte_hexdump(stdout, "src", src, cur_src - src);
+		rte_hexdump(stdout, "dst", dst, cur_dst - dst);
+		printf("data after dequeue is not the same\n");
+		goto fail;
+	}
+	cur_src = src;
+	cur_dst = dst;
+
+	printf("enqueue 1 obj\n");
+	ret = rte_ring_mp_enqueue_bulk(r, cur_src, 1);
+	cur_src += 1;
+	if (ret != 0)
+		goto fail;
+
+	printf("enqueue 2 objs\n");
+	ret = rte_ring_mp_enqueue_bulk(r, cur_src, 2);
+	cur_src += 2;
+	if (ret != 0)
+		goto fail;
+
+	printf("enqueue MAX_BULK objs\n");
+	ret = rte_ring_mp_enqueue_bulk(r, cur_src, MAX_BULK);
+	cur_src += MAX_BULK;
+	if (ret != 0)
+		goto fail;
+
+	printf("dequeue 1 obj\n");
+	ret = rte_ring_mc_dequeue_bulk(r, cur_dst, 1);
+	cur_dst += 1;
+	if (ret != 0)
+		goto fail;
+
+	printf("dequeue 2 objs\n");
+	ret = rte_ring_mc_dequeue_bulk(r, cur_dst, 2);
+	cur_dst += 2;
+	if (ret != 0)
+		goto fail;
+
+	printf("dequeue MAX_BULK objs\n");
+	ret = rte_ring_mc_dequeue_bulk(r, cur_dst, MAX_BULK);
+	cur_dst += MAX_BULK;
+	if (ret != 0)
+		goto fail;
+
+	/* check data */
+	if (memcmp(src, dst, cur_dst - dst)) {
+		rte_hexdump(stdout, "src", src, cur_src - src);
+		rte_hexdump(stdout, "dst", dst, cur_dst - dst);
+		printf("data after dequeue is not the same\n");
+		goto fail;
+	}
+	cur_src = src;
+	cur_dst = dst;
+
+	printf("fill and empty the ring\n");
+	for (i = 0; i<RING_SIZE/MAX_BULK; i++) {
+		ret = rte_ring_mp_enqueue_bulk(r, cur_src, MAX_BULK);
+		cur_src += MAX_BULK;
+		if (ret != 0)
+			goto fail;
+		ret = rte_ring_mc_dequeue_bulk(r, cur_dst, MAX_BULK);
+		cur_dst += MAX_BULK;
+		if (ret != 0)
+			goto fail;
+	}
+
+	/* check data */
+	if (memcmp(src, dst, cur_dst - dst)) {
+		rte_hexdump(stdout, "src", src, cur_src - src);
+		rte_hexdump(stdout, "dst", dst, cur_dst - dst);
+		printf("data after dequeue is not the same\n");
+		goto fail;
+	}
+
+	if (test_ring_basic_full_empty(src, dst) != 0)
+		goto fail;
+
+	cur_src = src;
+	cur_dst = dst;
+
+	printf("test watermark and default bulk enqueue / dequeue\n");
+	rte_ring_set_water_mark(r, 20);
+	num_elems = 16;
+
+	cur_src = src;
+	cur_dst = dst;
+
+	ret = rte_ring_enqueue_bulk(r, cur_src, num_elems);
+	cur_src += num_elems;
+	if (ret != 0) {
+		printf("Cannot enqueue\n");
+		goto fail;
+	}
+	ret = rte_ring_enqueue_bulk(r, cur_src, num_elems);
+	cur_src += num_elems;
+	if (ret != -EDQUOT) {
+		printf("Watermark not exceeded\n");
+		goto fail;
+	}
+	ret = rte_ring_dequeue_bulk(r, cur_dst, num_elems);
+	cur_dst += num_elems;
+	if (ret != 0) {
+		printf("Cannot dequeue\n");
+		goto fail;
+	}
+	ret = rte_ring_dequeue_bulk(r, cur_dst, num_elems);
+	cur_dst += num_elems;
+	if (ret != 0) {
+		printf("Cannot dequeue2\n");
+		goto fail;
+	}
+
+	/* check data */
+	if (memcmp(src, dst, cur_dst - dst)) {
+		rte_hexdump(stdout, "src", src, cur_src - src);
+		rte_hexdump(stdout, "dst", dst, cur_dst - dst);
+		printf("data after dequeue is not the same\n");
+		goto fail;
+	}
+
+	cur_src = src;
+	cur_dst = dst;
+
+	ret = rte_ring_mp_enqueue(r, cur_src);
+	if (ret != 0)
+		goto fail;
+
+	ret = rte_ring_mc_dequeue(r, cur_dst);
+	if (ret != 0)
+		goto fail;
+
+	free(src);
+	free(dst);
+	return 0;
+
+ fail:
+	free(src);
+	free(dst);
+	return -1;
+}
+
+static int
+test_ring_burst_basic(void)
+{
+	void **src = NULL, **cur_src = NULL, **dst = NULL, **cur_dst = NULL;
+	int ret;
+	unsigned i;
+
+	/* alloc dummy object pointers */
+	src = malloc(RING_SIZE*2*sizeof(void *));
+	if (src == NULL)
+		goto fail;
+
+	for (i = 0; i < RING_SIZE*2 ; i++) {
+		src[i] = (void *)(unsigned long)i;
+	}
+	cur_src = src;
+
+	/* alloc some room for copied objects */
+	dst = malloc(RING_SIZE*2*sizeof(void *));
+	if (dst == NULL)
+		goto fail;
+
+	memset(dst, 0, RING_SIZE*2*sizeof(void *));
+	cur_dst = dst;
+
+	printf("Test SP & SC basic functions \n");
+	printf("enqueue 1 obj\n");
+	ret = rte_ring_sp_enqueue_burst(r, cur_src, 1);
+	cur_src += 1;
+	if ((ret & RTE_RING_SZ_MASK) != 1)
+		goto fail;
+
+	printf("enqueue 2 objs\n");
+	ret = rte_ring_sp_enqueue_burst(r, cur_src, 2);
+	cur_src += 2;
+	if ((ret & RTE_RING_SZ_MASK) != 2)
+		goto fail;
+
+	printf("enqueue MAX_BULK objs\n");
+	ret = rte_ring_sp_enqueue_burst(r, cur_src, MAX_BULK) ;
+	cur_src += MAX_BULK;
+	if ((ret & RTE_RING_SZ_MASK) != MAX_BULK)
+		goto fail;
+
+	printf("dequeue 1 obj\n");
+	ret = rte_ring_sc_dequeue_burst(r, cur_dst, 1) ;
+	cur_dst += 1;
+	if ((ret & RTE_RING_SZ_MASK) != 1)
+		goto fail;
+
+	printf("dequeue 2 objs\n");
+	ret = rte_ring_sc_dequeue_burst(r, cur_dst, 2);
+	cur_dst += 2;
+	if ((ret & RTE_RING_SZ_MASK) != 2)
+		goto fail;
+
+	printf("dequeue MAX_BULK objs\n");
+	ret = rte_ring_sc_dequeue_burst(r, cur_dst, MAX_BULK);
+	cur_dst += MAX_BULK;
+	if ((ret & RTE_RING_SZ_MASK) != MAX_BULK)
+		goto fail;
+
+	/* check data */
+	if (memcmp(src, dst, cur_dst - dst)) {
+		rte_hexdump(stdout, "src", src, cur_src - src);
+		rte_hexdump(stdout, "dst", dst, cur_dst - dst);
+		printf("data after dequeue is not the same\n");
+		goto fail;
+	}
+
+	cur_src = src;
+	cur_dst = dst;
+
+	printf("Test enqueue without enough memory space \n");
+	for (i = 0; i< (RING_SIZE/MAX_BULK - 1); i++) {
+		ret = rte_ring_sp_enqueue_burst(r, cur_src, MAX_BULK);
+		cur_src += MAX_BULK;
+		if ((ret & RTE_RING_SZ_MASK) != MAX_BULK) {
+			goto fail;
+		}
+	}
+
+	printf("Enqueue 2 objects, free entries = MAX_BULK - 2  \n");
+	ret = rte_ring_sp_enqueue_burst(r, cur_src, 2);
+	cur_src += 2;
+	if ((ret & RTE_RING_SZ_MASK) != 2)
+		goto fail;
+
+	printf("Enqueue the remaining entries = MAX_BULK - 2  \n");
+	/* Always one free entry left */
+	ret = rte_ring_sp_enqueue_burst(r, cur_src, MAX_BULK);
+	cur_src += MAX_BULK - 3;
+	if ((ret & RTE_RING_SZ_MASK) != MAX_BULK - 3)
+		goto fail;
+
+	printf("Test if ring is full  \n");
+	if (rte_ring_full(r) != 1)
+		goto fail;
+
+	printf("Test enqueue for a full entry  \n");
+	ret = rte_ring_sp_enqueue_burst(r, cur_src, MAX_BULK);
+	if ((ret & RTE_RING_SZ_MASK) != 0)
+		goto fail;
+
+	printf("Test dequeue without enough objects \n");
+	for (i = 0; i<RING_SIZE/MAX_BULK - 1; i++) {
+		ret = rte_ring_sc_dequeue_burst(r, cur_dst, MAX_BULK);
+		cur_dst += MAX_BULK;
+		if ((ret & RTE_RING_SZ_MASK) != MAX_BULK)
+			goto fail;
+	}
+
+	/* Available memory space for the exact MAX_BULK entries */
+	ret = rte_ring_sc_dequeue_burst(r, cur_dst, 2);
+	cur_dst += 2;
+	if ((ret & RTE_RING_SZ_MASK) != 2)
+		goto fail;
+
+	ret = rte_ring_sc_dequeue_burst(r, cur_dst, MAX_BULK);
+	cur_dst += MAX_BULK - 3;
+	if ((ret & RTE_RING_SZ_MASK) != MAX_BULK - 3)
+		goto fail;
+
+	printf("Test if ring is empty \n");
+	/* Check if ring is empty */
+	if (1 != rte_ring_empty(r))
+		goto fail;
+
+	/* check data */
+	if (memcmp(src, dst, cur_dst - dst)) {
+		rte_hexdump(stdout, "src", src, cur_src - src);
+		rte_hexdump(stdout, "dst", dst, cur_dst - dst);
+		printf("data after dequeue is not the same\n");
+		goto fail;
+	}
+
+	cur_src = src;
+	cur_dst = dst;
+
+	printf("Test MP & MC basic functions \n");
+
+	printf("enqueue 1 obj\n");
+	ret = rte_ring_mp_enqueue_burst(r, cur_src, 1);
+	cur_src += 1;
+	if ((ret & RTE_RING_SZ_MASK) != 1)
+		goto fail;
+
+	printf("enqueue 2 objs\n");
+	ret = rte_ring_mp_enqueue_burst(r, cur_src, 2);
+	cur_src += 2;
+	if ((ret & RTE_RING_SZ_MASK) != 2)
+		goto fail;
+
+	printf("enqueue MAX_BULK objs\n");
+	ret = rte_ring_mp_enqueue_burst(r, cur_src, MAX_BULK);
+	cur_src += MAX_BULK;
+	if ((ret & RTE_RING_SZ_MASK) != MAX_BULK)
+		goto fail;
+
+	printf("dequeue 1 obj\n");
+	ret = rte_ring_mc_dequeue_burst(r, cur_dst, 1);
+	cur_dst += 1;
+	if ((ret & RTE_RING_SZ_MASK) != 1)
+		goto fail;
+
+	printf("dequeue 2 objs\n");
+	ret = rte_ring_mc_dequeue_burst(r, cur_dst, 2);
+	cur_dst += 2;
+	if ((ret & RTE_RING_SZ_MASK) != 2)
+		goto fail;
+
+	printf("dequeue MAX_BULK objs\n");
+	ret = rte_ring_mc_dequeue_burst(r, cur_dst, MAX_BULK);
+	cur_dst += MAX_BULK;
+	if ((ret & RTE_RING_SZ_MASK) != MAX_BULK)
+		goto fail;
+
+	/* check data */
+	if (memcmp(src, dst, cur_dst - dst)) {
+		rte_hexdump(stdout, "src", src, cur_src - src);
+		rte_hexdump(stdout, "dst", dst, cur_dst - dst);
+		printf("data after dequeue is not the same\n");
+		goto fail;
+	}
+
+	cur_src = src;
+	cur_dst = dst;
+
+	printf("fill and empty the ring\n");
+	for (i = 0; i<RING_SIZE/MAX_BULK; i++) {
+		ret = rte_ring_mp_enqueue_burst(r, cur_src, MAX_BULK);
+		cur_src += MAX_BULK;
+		if ((ret & RTE_RING_SZ_MASK) != MAX_BULK)
+			goto fail;
+		ret = rte_ring_mc_dequeue_burst(r, cur_dst, MAX_BULK);
+		cur_dst += MAX_BULK;
+		if ((ret & RTE_RING_SZ_MASK) != MAX_BULK)
+			goto fail;
+	}
+
+	/* check data */
+	if (memcmp(src, dst, cur_dst - dst)) {
+		rte_hexdump(stdout, "src", src, cur_src - src);
+		rte_hexdump(stdout, "dst", dst, cur_dst - dst);
+		printf("data after dequeue is not the same\n");
+		goto fail;
+	}
+
+	cur_src = src;
+	cur_dst = dst;
+
+	printf("Test enqueue without enough memory space \n");
+	for (i = 0; i<RING_SIZE/MAX_BULK - 1; i++) {
+		ret = rte_ring_mp_enqueue_burst(r, cur_src, MAX_BULK);
+		cur_src += MAX_BULK;
+		if ((ret & RTE_RING_SZ_MASK) != MAX_BULK)
+			goto fail;
+	}
+
+	/* Available memory space for the exact MAX_BULK objects */
+	ret = rte_ring_mp_enqueue_burst(r, cur_src, 2);
+	cur_src += 2;
+	if ((ret & RTE_RING_SZ_MASK) != 2)
+		goto fail;
+
+	ret = rte_ring_mp_enqueue_burst(r, cur_src, MAX_BULK);
+	cur_src += MAX_BULK - 3;
+	if ((ret & RTE_RING_SZ_MASK) != MAX_BULK - 3)
+		goto fail;
+
+
+	printf("Test dequeue without enough objects \n");
+	for (i = 0; i<RING_SIZE/MAX_BULK - 1; i++) {
+		ret = rte_ring_mc_dequeue_burst(r, cur_dst, MAX_BULK);
+		cur_dst += MAX_BULK;
+		if ((ret & RTE_RING_SZ_MASK) != MAX_BULK)
+			goto fail;
+	}
+
+	/* Available objects - the exact MAX_BULK */
+	ret = rte_ring_mc_dequeue_burst(r, cur_dst, 2);
+	cur_dst += 2;
+	if ((ret & RTE_RING_SZ_MASK) != 2)
+		goto fail;
+
+	ret = rte_ring_mc_dequeue_burst(r, cur_dst, MAX_BULK);
+	cur_dst += MAX_BULK - 3;
+	if ((ret & RTE_RING_SZ_MASK) != MAX_BULK - 3)
+		goto fail;
+
+	/* check data */
+	if (memcmp(src, dst, cur_dst - dst)) {
+		rte_hexdump(stdout, "src", src, cur_src - src);
+		rte_hexdump(stdout, "dst", dst, cur_dst - dst);
+		printf("data after dequeue is not the same\n");
+		goto fail;
+	}
+
+	cur_src = src;
+	cur_dst = dst;
+
+	printf("Covering rte_ring_enqueue_burst functions \n");
+
+	ret = rte_ring_enqueue_burst(r, cur_src, 2);
+	cur_src += 2;
+	if ((ret & RTE_RING_SZ_MASK) != 2)
+		goto fail;
+
+	ret = rte_ring_dequeue_burst(r, cur_dst, 2);
+	cur_dst += 2;
+	if (ret != 2)
+		goto fail;
+
+	/* Free memory before test completed */
+	free(src);
+	free(dst);
+	return 0;
+
+ fail:
+	free(src);
+	free(dst);
+	return -1;
+}
+
+static int
+test_ring_stats(void)
+{
+
+#ifndef RTE_LIBRTE_RING_DEBUG
+	printf("Enable RTE_LIBRTE_RING_DEBUG to test ring stats.\n");
+	return 0;
+#else
+	void **src = NULL, **cur_src = NULL, **dst = NULL, **cur_dst = NULL;
+	int ret;
+	unsigned i;
+	unsigned num_items            = 0;
+	unsigned failed_enqueue_ops   = 0;
+	unsigned failed_enqueue_items = 0;
+	unsigned failed_dequeue_ops   = 0;
+	unsigned failed_dequeue_items = 0;
+	unsigned last_enqueue_ops     = 0;
+	unsigned last_enqueue_items   = 0;
+	unsigned last_quota_ops       = 0;
+	unsigned last_quota_items     = 0;
+	unsigned lcore_id = rte_lcore_id();
+	struct rte_ring_debug_stats *ring_stats = &r->stats[lcore_id];
+
+	printf("Test the ring stats.\n");
+
+	/* Reset the watermark in case it was set in another test. */
+	rte_ring_set_water_mark(r, 0);
+
+	/* Reset the ring stats. */
+	memset(&r->stats[lcore_id], 0, sizeof(r->stats[lcore_id]));
+
+	/* Allocate some dummy object pointers. */
+	src = malloc(RING_SIZE*2*sizeof(void *));
+	if (src == NULL)
+		goto fail;
+
+	for (i = 0; i < RING_SIZE*2 ; i++) {
+		src[i] = (void *)(unsigned long)i;
+	}
+
+	/* Allocate some memory for copied objects. */
+	dst = malloc(RING_SIZE*2*sizeof(void *));
+	if (dst == NULL)
+		goto fail;
+
+	memset(dst, 0, RING_SIZE*2*sizeof(void *));
+
+	/* Set the head and tail pointers. */
+	cur_src = src;
+	cur_dst = dst;
+
+	/* Do Enqueue tests. */
+	printf("Test the dequeue stats.\n");
+
+	/* Fill the ring up to RING_SIZE -1. */
+	printf("Fill the ring.\n");
+	for (i = 0; i< (RING_SIZE/MAX_BULK); i++) {
+		rte_ring_sp_enqueue_burst(r, cur_src, MAX_BULK);
+		cur_src += MAX_BULK;
+	}
+
+	/* Adjust for final enqueue = MAX_BULK -1. */
+	cur_src--;
+
+	printf("Verify that the ring is full.\n");
+	if (rte_ring_full(r) != 1)
+		goto fail;
+
+
+	printf("Verify the enqueue success stats.\n");
+	/* Stats should match above enqueue operations to fill the ring. */
+	if (ring_stats->enq_success_bulk != (RING_SIZE/MAX_BULK))
+		goto fail;
+
+	/* Current max objects is RING_SIZE -1. */
+	if (ring_stats->enq_success_objs != RING_SIZE -1)
+		goto fail;
+
+	/* Shouldn't have any failures yet. */
+	if (ring_stats->enq_fail_bulk != 0)
+		goto fail;
+	if (ring_stats->enq_fail_objs != 0)
+		goto fail;
+
+
+	printf("Test stats for SP burst enqueue to a full ring.\n");
+	num_items = 2;
+	ret = rte_ring_sp_enqueue_burst(r, cur_src, num_items);
+	if ((ret & RTE_RING_SZ_MASK) != 0)
+		goto fail;
+
+	failed_enqueue_ops   += 1;
+	failed_enqueue_items += num_items;
+
+	/* The enqueue should have failed. */
+	if (ring_stats->enq_fail_bulk != failed_enqueue_ops)
+		goto fail;
+	if (ring_stats->enq_fail_objs != failed_enqueue_items)
+		goto fail;
+
+
+	printf("Test stats for SP bulk enqueue to a full ring.\n");
+	num_items = 4;
+	ret = rte_ring_sp_enqueue_bulk(r, cur_src, num_items);
+	if (ret != -ENOBUFS)
+		goto fail;
+
+	failed_enqueue_ops   += 1;
+	failed_enqueue_items += num_items;
+
+	/* The enqueue should have failed. */
+	if (ring_stats->enq_fail_bulk != failed_enqueue_ops)
+		goto fail;
+	if (ring_stats->enq_fail_objs != failed_enqueue_items)
+		goto fail;
+
+
+	printf("Test stats for MP burst enqueue to a full ring.\n");
+	num_items = 8;
+	ret = rte_ring_mp_enqueue_burst(r, cur_src, num_items);
+	if ((ret & RTE_RING_SZ_MASK) != 0)
+		goto fail;
+
+	failed_enqueue_ops   += 1;
+	failed_enqueue_items += num_items;
+
+	/* The enqueue should have failed. */
+	if (ring_stats->enq_fail_bulk != failed_enqueue_ops)
+		goto fail;
+	if (ring_stats->enq_fail_objs != failed_enqueue_items)
+		goto fail;
+
+
+	printf("Test stats for MP bulk enqueue to a full ring.\n");
+	num_items = 16;
+	ret = rte_ring_mp_enqueue_bulk(r, cur_src, num_items);
+	if (ret != -ENOBUFS)
+		goto fail;
+
+	failed_enqueue_ops   += 1;
+	failed_enqueue_items += num_items;
+
+	/* The enqueue should have failed. */
+	if (ring_stats->enq_fail_bulk != failed_enqueue_ops)
+		goto fail;
+	if (ring_stats->enq_fail_objs != failed_enqueue_items)
+		goto fail;
+
+
+	/* Do Dequeue tests. */
+	printf("Test the dequeue stats.\n");
+
+	printf("Empty the ring.\n");
+	for (i = 0; i<RING_SIZE/MAX_BULK; i++) {
+		rte_ring_sc_dequeue_burst(r, cur_dst, MAX_BULK);
+		cur_dst += MAX_BULK;
+	}
+
+	/* There was only RING_SIZE -1 objects to dequeue. */
+	cur_dst++;
+
+	printf("Verify ring is empty.\n");
+	if (1 != rte_ring_empty(r))
+		goto fail;
+
+	printf("Verify the dequeue success stats.\n");
+	/* Stats should match above dequeue operations. */
+	if (ring_stats->deq_success_bulk != (RING_SIZE/MAX_BULK))
+		goto fail;
+
+	/* Objects dequeued is RING_SIZE -1. */
+	if (ring_stats->deq_success_objs != RING_SIZE -1)
+		goto fail;
+
+	/* Shouldn't have any dequeue failure stats yet. */
+	if (ring_stats->deq_fail_bulk != 0)
+		goto fail;
+
+	printf("Test stats for SC burst dequeue with an empty ring.\n");
+	num_items = 2;
+	ret = rte_ring_sc_dequeue_burst(r, cur_dst, num_items);
+	if ((ret & RTE_RING_SZ_MASK) != 0)
+		goto fail;
+
+	failed_dequeue_ops   += 1;
+	failed_dequeue_items += num_items;
+
+	/* The dequeue should have failed. */
+	if (ring_stats->deq_fail_bulk != failed_dequeue_ops)
+		goto fail;
+	if (ring_stats->deq_fail_objs != failed_dequeue_items)
+		goto fail;
+
+
+	printf("Test stats for SC bulk dequeue with an empty ring.\n");
+	num_items = 4;
+	ret = rte_ring_sc_dequeue_bulk(r, cur_dst, num_items);
+	if (ret != -ENOENT)
+		goto fail;
+
+	failed_dequeue_ops   += 1;
+	failed_dequeue_items += num_items;
+
+	/* The dequeue should have failed. */
+	if (ring_stats->deq_fail_bulk != failed_dequeue_ops)
+		goto fail;
+	if (ring_stats->deq_fail_objs != failed_dequeue_items)
+		goto fail;
+
+
+	printf("Test stats for MC burst dequeue with an empty ring.\n");
+	num_items = 8;
+	ret = rte_ring_mc_dequeue_burst(r, cur_dst, num_items);
+	if ((ret & RTE_RING_SZ_MASK) != 0)
+		goto fail;
+	failed_dequeue_ops   += 1;
+	failed_dequeue_items += num_items;
+
+	/* The dequeue should have failed. */
+	if (ring_stats->deq_fail_bulk != failed_dequeue_ops)
+		goto fail;
+	if (ring_stats->deq_fail_objs != failed_dequeue_items)
+		goto fail;
+
+
+	printf("Test stats for MC bulk dequeue with an empty ring.\n");
+	num_items = 16;
+	ret = rte_ring_mc_dequeue_bulk(r, cur_dst, num_items);
+	if (ret != -ENOENT)
+		goto fail;
+
+	failed_dequeue_ops   += 1;
+	failed_dequeue_items += num_items;
+
+	/* The dequeue should have failed. */
+	if (ring_stats->deq_fail_bulk != failed_dequeue_ops)
+		goto fail;
+	if (ring_stats->deq_fail_objs != failed_dequeue_items)
+		goto fail;
+
+
+	printf("Test total enqueue/dequeue stats.\n");
+	/* At this point the enqueue and dequeue stats should be the same. */
+	if (ring_stats->enq_success_bulk != ring_stats->deq_success_bulk)
+		goto fail;
+	if (ring_stats->enq_success_objs != ring_stats->deq_success_objs)
+		goto fail;
+	if (ring_stats->enq_fail_bulk    != ring_stats->deq_fail_bulk)
+		goto fail;
+	if (ring_stats->enq_fail_objs    != ring_stats->deq_fail_objs)
+		goto fail;
+
+
+	/* Watermark Tests. */
+	printf("Test the watermark/quota stats.\n");
+
+	printf("Verify the initial watermark stats.\n");
+	/* Watermark stats should be 0 since there is no watermark. */
+	if (ring_stats->enq_quota_bulk != 0)
+		goto fail;
+	if (ring_stats->enq_quota_objs != 0)
+		goto fail;
+
+	/* Set a watermark. */
+	rte_ring_set_water_mark(r, 16);
+
+	/* Reset pointers. */
+	cur_src = src;
+	cur_dst = dst;
+
+	last_enqueue_ops   = ring_stats->enq_success_bulk;
+	last_enqueue_items = ring_stats->enq_success_objs;
+
+
+	printf("Test stats for SP burst enqueue below watermark.\n");
+	num_items = 8;
+	ret = rte_ring_sp_enqueue_burst(r, cur_src, num_items);
+	if ((ret & RTE_RING_SZ_MASK) != num_items)
+		goto fail;
+
+	/* Watermark stats should still be 0. */
+	if (ring_stats->enq_quota_bulk != 0)
+		goto fail;
+	if (ring_stats->enq_quota_objs != 0)
+		goto fail;
+
+	/* Success stats should have increased. */
+	if (ring_stats->enq_success_bulk != last_enqueue_ops + 1)
+		goto fail;
+	if (ring_stats->enq_success_objs != last_enqueue_items + num_items)
+		goto fail;
+
+	last_enqueue_ops   = ring_stats->enq_success_bulk;
+	last_enqueue_items = ring_stats->enq_success_objs;
+
+
+	printf("Test stats for SP burst enqueue at watermark.\n");
+	num_items = 8;
+	ret = rte_ring_sp_enqueue_burst(r, cur_src, num_items);
+	if ((ret & RTE_RING_SZ_MASK) != num_items)
+		goto fail;
+
+	/* Watermark stats should have changed. */
+	if (ring_stats->enq_quota_bulk != 1)
+		goto fail;
+	if (ring_stats->enq_quota_objs != num_items)
+		goto fail;
+
+	last_quota_ops   = ring_stats->enq_quota_bulk;
+	last_quota_items = ring_stats->enq_quota_objs;
+
+
+	printf("Test stats for SP burst enqueue above watermark.\n");
+	num_items = 1;
+	ret = rte_ring_sp_enqueue_burst(r, cur_src, num_items);
+	if ((ret & RTE_RING_SZ_MASK) != num_items)
+		goto fail;
+
+	/* Watermark stats should have changed. */
+	if (ring_stats->enq_quota_bulk != last_quota_ops +1)
+		goto fail;
+	if (ring_stats->enq_quota_objs != last_quota_items + num_items)
+		goto fail;
+
+	last_quota_ops   = ring_stats->enq_quota_bulk;
+	last_quota_items = ring_stats->enq_quota_objs;
+
+
+	printf("Test stats for MP burst enqueue above watermark.\n");
+	num_items = 2;
+	ret = rte_ring_mp_enqueue_burst(r, cur_src, num_items);
+	if ((ret & RTE_RING_SZ_MASK) != num_items)
+		goto fail;
+
+	/* Watermark stats should have changed. */
+	if (ring_stats->enq_quota_bulk != last_quota_ops +1)
+		goto fail;
+	if (ring_stats->enq_quota_objs != last_quota_items + num_items)
+		goto fail;
+
+	last_quota_ops   = ring_stats->enq_quota_bulk;
+	last_quota_items = ring_stats->enq_quota_objs;
+
+
+	printf("Test stats for SP bulk enqueue above watermark.\n");
+	num_items = 4;
+	ret = rte_ring_sp_enqueue_bulk(r, cur_src, num_items);
+	if (ret != -EDQUOT)
+		goto fail;
+
+	/* Watermark stats should have changed. */
+	if (ring_stats->enq_quota_bulk != last_quota_ops +1)
+		goto fail;
+	if (ring_stats->enq_quota_objs != last_quota_items + num_items)
+		goto fail;
+
+	last_quota_ops   = ring_stats->enq_quota_bulk;
+	last_quota_items = ring_stats->enq_quota_objs;
+
+
+	printf("Test stats for MP bulk enqueue above watermark.\n");
+	num_items = 8;
+	ret = rte_ring_mp_enqueue_bulk(r, cur_src, num_items);
+	if (ret != -EDQUOT)
+		goto fail;
+
+	/* Watermark stats should have changed. */
+	if (ring_stats->enq_quota_bulk != last_quota_ops +1)
+		goto fail;
+	if (ring_stats->enq_quota_objs != last_quota_items + num_items)
+		goto fail;
+
+	printf("Test watermark success stats.\n");
+	/* Success stats should be same as last non-watermarked enqueue. */
+	if (ring_stats->enq_success_bulk != last_enqueue_ops)
+		goto fail;
+	if (ring_stats->enq_success_objs != last_enqueue_items)
+		goto fail;
+
+
+	/* Cleanup. */
+
+	/* Empty the ring. */
+	for (i = 0; i<RING_SIZE/MAX_BULK; i++) {
+		rte_ring_sc_dequeue_burst(r, cur_dst, MAX_BULK);
+		cur_dst += MAX_BULK;
+	}
+
+	/* Reset the watermark. */
+	rte_ring_set_water_mark(r, 0);
+
+	/* Reset the ring stats. */
+	memset(&r->stats[lcore_id], 0, sizeof(r->stats[lcore_id]));
+
+	/* Free memory before test completed */
+	free(src);
+	free(dst);
+	return 0;
+
+fail:
+	free(src);
+	free(dst);
+	return -1;
+#endif
+}
+
+/*
+ * it will always fail to create ring with a wrong ring size number in this function
+ */
+static int
+test_ring_creation_with_wrong_size(void)
+{
+	struct rte_ring * rp = NULL;
+
+	/* Test if ring size is not power of 2 */
+	rp = rte_ring_create("test_bad_ring_size", RING_SIZE + 1, SOCKET_ID_ANY, 0);
+	if (NULL != rp) {
+		return -1;
+	}
+
+	/* Test if ring size is exceeding the limit */
+	rp = rte_ring_create("test_bad_ring_size", (RTE_RING_SZ_MASK + 1), SOCKET_ID_ANY, 0);
+	if (NULL != rp) {
+		return -1;
+	}
+	return 0;
+}
+
+/*
+ * it tests if it would always fail to create ring with an used ring name
+ */
+static int
+test_ring_creation_with_an_used_name(void)
+{
+	struct rte_ring * rp;
+
+	rp = rte_ring_create("test", RING_SIZE, SOCKET_ID_ANY, 0);
+	if (NULL != rp)
+		return -1;
+
+	return 0;
+}
+
+/*
+ * Test to if a non-power of 2 count causes the create
+ * function to fail correctly
+ */
+static int
+test_create_count_odd(void)
+{
+	struct rte_ring *r = rte_ring_create("test_ring_count",
+			4097, SOCKET_ID_ANY, 0 );
+	if(r != NULL){
+		return -1;
+	}
+	return 0;
+}
+
+static int
+test_lookup_null(void)
+{
+	struct rte_ring *rlp = rte_ring_lookup("ring_not_found");
+	if (rlp ==NULL)
+	if (rte_errno != ENOENT){
+		printf( "test failed to returnn error on null pointer\n");
+		return -1;
+	}
+	return 0;
+}
+
+/*
+ * it tests some more basic ring operations
+ */
+static int
+test_ring_basic_ex(void)
+{
+	int ret = -1;
+	unsigned i;
+	struct rte_ring * rp;
+	void **obj = NULL;
+
+	obj = rte_calloc("test_ring_basic_ex_malloc", RING_SIZE, sizeof(void *), 0);
+	if (obj == NULL) {
+		printf("test_ring_basic_ex fail to rte_malloc\n");
+		goto fail_test;
+	}
+
+	rp = rte_ring_create("test_ring_basic_ex", RING_SIZE, SOCKET_ID_ANY,
+			RING_F_SP_ENQ | RING_F_SC_DEQ);
+	if (rp == NULL) {
+		printf("test_ring_basic_ex fail to create ring\n");
+		goto fail_test;
+	}
+
+	if (rte_ring_lookup("test_ring_basic_ex") != rp) {
+		goto fail_test;
+	}
+
+	if (rte_ring_empty(rp) != 1) {
+		printf("test_ring_basic_ex ring is not empty but it should be\n");
+		goto fail_test;
+	}
+
+	printf("%u ring entries are now free\n", rte_ring_free_count(rp));
+
+	for (i = 0; i < RING_SIZE; i ++) {
+		rte_ring_enqueue(rp, obj[i]);
+	}
+
+	if (rte_ring_full(rp) != 1) {
+		printf("test_ring_basic_ex ring is not full but it should be\n");
+		goto fail_test;
+	}
+
+	for (i = 0; i < RING_SIZE; i ++) {
+		rte_ring_dequeue(rp, &obj[i]);
+	}
+
+	if (rte_ring_empty(rp) != 1) {
+		printf("test_ring_basic_ex ring is not empty but it should be\n");
+		goto fail_test;
+	}
+
+	/* Covering the ring burst operation */
+	ret = rte_ring_enqueue_burst(rp, obj, 2);
+	if ((ret & RTE_RING_SZ_MASK) != 2) {
+		printf("test_ring_basic_ex: rte_ring_enqueue_burst fails \n");
+		goto fail_test;
+	}
+
+	ret = rte_ring_dequeue_burst(rp, obj, 2);
+	if (ret != 2) {
+		printf("test_ring_basic_ex: rte_ring_dequeue_burst fails \n");
+		goto fail_test;
+	}
+
+	ret = 0;
+fail_test:
+	if (obj != NULL)
+		rte_free(obj);
+
+	return ret;
+}
+
+static int
+test_ring(void)
+{
+	/* some more basic operations */
+	if (test_ring_basic_ex() < 0)
+		return -1;
+
+	rte_atomic32_init(&synchro);
+
+	if (r == NULL)
+		r = rte_ring_create("test", RING_SIZE, SOCKET_ID_ANY, 0);
+	if (r == NULL)
+		return -1;
+
+	/* retrieve the ring from its name */
+	if (rte_ring_lookup("test") != r) {
+		printf("Cannot lookup ring from its name\n");
+		return -1;
+	}
+
+	/* burst operations */
+	if (test_ring_burst_basic() < 0)
+		return -1;
+
+	/* basic operations */
+	if (test_ring_basic() < 0)
+		return -1;
+
+	/* ring stats */
+	if (test_ring_stats() < 0)
+		return -1;
+
+	/* basic operations */
+	if (test_live_watermark_change() < 0)
+		return -1;
+
+	if ( test_set_watermark() < 0){
+		printf ("Test failed to detect invalid parameter\n");
+		return -1;
+	}
+	else
+		printf ( "Test detected forced bad watermark values\n");
+
+	if ( test_create_count_odd() < 0){
+			printf ("Test failed to detect odd count\n");
+			return -1;
+		}
+		else
+			printf ( "Test detected odd count\n");
+
+	if ( test_lookup_null() < 0){
+				printf ("Test failed to detect NULL ring lookup\n");
+				return -1;
+			}
+			else
+				printf ( "Test detected NULL ring lookup \n");
+
+	/* test of creating ring with wrong size */
+	if (test_ring_creation_with_wrong_size() < 0)
+		return -1;
+
+	/* test of creation ring with an used name */
+	if (test_ring_creation_with_an_used_name() < 0)
+		return -1;
+
+	/* dump the ring status */
+	rte_ring_list_dump(stdout);
+
+	return 0;
+}
+
+static struct test_command ring_cmd = {
+	.command = "ring_autotest",
+	.callback = test_ring,
+};
+REGISTER_TEST_COMMAND(ring_cmd);