[dpdk-dev] [PATCH v2 04/14] ring: remove debug setting

[Bruce Richardson <bruce.richardson@intel.com>]

The debug option only provided statistics to the user, most of
which could be tracked by the application itself. Remove this as a
compile time option, and feature, simplifying the code.

Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
---
 config/common_base                     |   1 -
 doc/guides/prog_guide/ring_lib.rst     |   7 -
 doc/guides/rel_notes/release_17_05.rst |   1 +
 lib/librte_ring/rte_ring.c             |  41 ----
 lib/librte_ring/rte_ring.h             |  97 +-------
 test/test/test_ring.c                  | 410 ---------------------------------
 6 files changed, 13 insertions(+), 544 deletions(-)

diff --git a/config/common_base b/config/common_base
index 099ffda..b3d8272 100644
--- a/config/common_base
+++ b/config/common_base
@@ -447,7 +447,6 @@ CONFIG_RTE_LIBRTE_PMD_NULL_CRYPTO=y
 # Compile librte_ring
 #
 CONFIG_RTE_LIBRTE_RING=y
-CONFIG_RTE_LIBRTE_RING_DEBUG=n
 CONFIG_RTE_RING_PAUSE_REP_COUNT=0
 
 #
diff --git a/doc/guides/prog_guide/ring_lib.rst b/doc/guides/prog_guide/ring_lib.rst
index 9f69753..d4ab502 100644
--- a/doc/guides/prog_guide/ring_lib.rst
+++ b/doc/guides/prog_guide/ring_lib.rst
@@ -110,13 +110,6 @@ Once an enqueue operation reaches the high water mark, the producer is notified,
 
 This mechanism can be used, for example, to exert a back pressure on I/O to inform the LAN to PAUSE.
 
-Debug
-~~~~~
-
-When debug is enabled (CONFIG_RTE_LIBRTE_RING_DEBUG is set),
-the library stores some per-ring statistic counters about the number of enqueues/dequeues.
-These statistics are per-core to avoid concurrent accesses or atomic operations.
-
 Use Cases
 ---------
 
diff --git a/doc/guides/rel_notes/release_17_05.rst b/doc/guides/rel_notes/release_17_05.rst
index ea45e0c..e0ebd71 100644
--- a/doc/guides/rel_notes/release_17_05.rst
+++ b/doc/guides/rel_notes/release_17_05.rst
@@ -116,6 +116,7 @@ API Changes
   have been made to it:
 
   * removed the build-time setting ``CONFIG_RTE_RING_SPLIT_PROD_CONS``
+  * removed the build-time setting ``CONFIG_RTE_LIBRTE_RING_DEBUG``
 
 ABI Changes
 -----------
diff --git a/lib/librte_ring/rte_ring.c b/lib/librte_ring/rte_ring.c
index 80fc356..90ee63f 100644
--- a/lib/librte_ring/rte_ring.c
+++ b/lib/librte_ring/rte_ring.c
@@ -131,12 +131,6 @@ rte_ring_init(struct rte_ring *r, const char *name, unsigned count,
 			  RTE_CACHE_LINE_MASK) != 0);
 	RTE_BUILD_BUG_ON((offsetof(struct rte_ring, prod) &
 			  RTE_CACHE_LINE_MASK) != 0);
-#ifdef RTE_LIBRTE_RING_DEBUG
-	RTE_BUILD_BUG_ON((sizeof(struct rte_ring_debug_stats) &
-			  RTE_CACHE_LINE_MASK) != 0);
-	RTE_BUILD_BUG_ON((offsetof(struct rte_ring, stats) &
-			  RTE_CACHE_LINE_MASK) != 0);
-#endif
 
 	/* init the ring structure */
 	memset(r, 0, sizeof(*r));
@@ -284,11 +278,6 @@ rte_ring_set_water_mark(struct rte_ring *r, unsigned count)
 void
 rte_ring_dump(FILE *f, const struct rte_ring *r)
 {
-#ifdef RTE_LIBRTE_RING_DEBUG
-	struct rte_ring_debug_stats sum;
-	unsigned lcore_id;
-#endif
-
 	fprintf(f, "ring <%s>@%p\n", r->name, r);
 	fprintf(f, "  flags=%x\n", r->flags);
 	fprintf(f, "  size=%"PRIu32"\n", r->size);
@@ -302,36 +291,6 @@ rte_ring_dump(FILE *f, const struct rte_ring *r)
 		fprintf(f, "  watermark=0\n");
 	else
 		fprintf(f, "  watermark=%"PRIu32"\n", r->watermark);
-
-	/* sum and dump statistics */
-#ifdef RTE_LIBRTE_RING_DEBUG
-	memset(&sum, 0, sizeof(sum));
-	for (lcore_id = 0; lcore_id < RTE_MAX_LCORE; lcore_id++) {
-		sum.enq_success_bulk += r->stats[lcore_id].enq_success_bulk;
-		sum.enq_success_objs += r->stats[lcore_id].enq_success_objs;
-		sum.enq_quota_bulk += r->stats[lcore_id].enq_quota_bulk;
-		sum.enq_quota_objs += r->stats[lcore_id].enq_quota_objs;
-		sum.enq_fail_bulk += r->stats[lcore_id].enq_fail_bulk;
-		sum.enq_fail_objs += r->stats[lcore_id].enq_fail_objs;
-		sum.deq_success_bulk += r->stats[lcore_id].deq_success_bulk;
-		sum.deq_success_objs += r->stats[lcore_id].deq_success_objs;
-		sum.deq_fail_bulk += r->stats[lcore_id].deq_fail_bulk;
-		sum.deq_fail_objs += r->stats[lcore_id].deq_fail_objs;
-	}
-	fprintf(f, "  size=%"PRIu32"\n", r->size);
-	fprintf(f, "  enq_success_bulk=%"PRIu64"\n", sum.enq_success_bulk);
-	fprintf(f, "  enq_success_objs=%"PRIu64"\n", sum.enq_success_objs);
-	fprintf(f, "  enq_quota_bulk=%"PRIu64"\n", sum.enq_quota_bulk);
-	fprintf(f, "  enq_quota_objs=%"PRIu64"\n", sum.enq_quota_objs);
-	fprintf(f, "  enq_fail_bulk=%"PRIu64"\n", sum.enq_fail_bulk);
-	fprintf(f, "  enq_fail_objs=%"PRIu64"\n", sum.enq_fail_objs);
-	fprintf(f, "  deq_success_bulk=%"PRIu64"\n", sum.deq_success_bulk);
-	fprintf(f, "  deq_success_objs=%"PRIu64"\n", sum.deq_success_objs);
-	fprintf(f, "  deq_fail_bulk=%"PRIu64"\n", sum.deq_fail_bulk);
-	fprintf(f, "  deq_fail_objs=%"PRIu64"\n", sum.deq_fail_objs);
-#else
-	fprintf(f, "  no statistics available\n");
-#endif
 }
 
 /* dump the status of all rings on the console */
diff --git a/lib/librte_ring/rte_ring.h b/lib/librte_ring/rte_ring.h
index 61c0982..af7b7d4 100644
--- a/lib/librte_ring/rte_ring.h
+++ b/lib/librte_ring/rte_ring.h
@@ -109,24 +109,6 @@ enum rte_ring_queue_behavior {
 	RTE_RING_QUEUE_VARIABLE   /* Enq/Deq as many items as possible from ring */
 };
 
-#ifdef RTE_LIBRTE_RING_DEBUG
-/**
- * A structure that stores the ring statistics (per-lcore).
- */
-struct rte_ring_debug_stats {
-	uint64_t enq_success_bulk; /**< Successful enqueues number. */
-	uint64_t enq_success_objs; /**< Objects successfully enqueued. */
-	uint64_t enq_quota_bulk;   /**< Successful enqueues above watermark. */
-	uint64_t enq_quota_objs;   /**< Objects enqueued above watermark. */
-	uint64_t enq_fail_bulk;    /**< Failed enqueues number. */
-	uint64_t enq_fail_objs;    /**< Objects that failed to be enqueued. */
-	uint64_t deq_success_bulk; /**< Successful dequeues number. */
-	uint64_t deq_success_objs; /**< Objects successfully dequeued. */
-	uint64_t deq_fail_bulk;    /**< Failed dequeues number. */
-	uint64_t deq_fail_objs;    /**< Objects that failed to be dequeued. */
-} __rte_cache_aligned;
-#endif
-
 #define RTE_RING_MZ_PREFIX "RG_"
 /**< The maximum length of a ring name. */
 #define RTE_RING_NAMESIZE (RTE_MEMZONE_NAMESIZE - \
@@ -187,10 +169,6 @@ struct rte_ring {
 	/** Ring consumer status. */
 	struct rte_ring_headtail cons __rte_aligned(CONS_ALIGN);
 
-#ifdef RTE_LIBRTE_RING_DEBUG
-	struct rte_ring_debug_stats stats[RTE_MAX_LCORE];
-#endif
-
 	void *ring[] __rte_cache_aligned;   /**< Memory space of ring starts here.
 	                                     * not volatile so need to be careful
 	                                     * about compiler re-ordering */
@@ -202,27 +180,6 @@ struct rte_ring {
 #define RTE_RING_SZ_MASK  (unsigned)(0x0fffffff) /**< Ring size mask */
 
 /**
- * @internal When debug is enabled, store ring statistics.
- * @param r
- *   A pointer to the ring.
- * @param name
- *   The name of the statistics field to increment in the ring.
- * @param n
- *   The number to add to the object-oriented statistics.
- */
-#ifdef RTE_LIBRTE_RING_DEBUG
-#define __RING_STAT_ADD(r, name, n) do {                        \
-		unsigned __lcore_id = rte_lcore_id();           \
-		if (__lcore_id < RTE_MAX_LCORE) {               \
-			r->stats[__lcore_id].name##_objs += n;  \
-			r->stats[__lcore_id].name##_bulk += 1;  \
-		}                                               \
-	} while(0)
-#else
-#define __RING_STAT_ADD(r, name, n) do {} while(0)
-#endif
-
-/**
  * Calculate the memory size needed for a ring
  *
  * This function returns the number of bytes needed for a ring, given
@@ -463,17 +420,12 @@ __rte_ring_mp_do_enqueue(struct rte_ring *r, void * const *obj_table,
 
 		/* check that we have enough room in ring */
 		if (unlikely(n > free_entries)) {
-			if (behavior == RTE_RING_QUEUE_FIXED) {
-				__RING_STAT_ADD(r, enq_fail, n);
+			if (behavior == RTE_RING_QUEUE_FIXED)
 				return -ENOBUFS;
-			}
 			else {
 				/* No free entry available */
-				if (unlikely(free_entries == 0)) {
-					__RING_STAT_ADD(r, enq_fail, n);
+				if (unlikely(free_entries == 0))
 					return 0;
-				}
-
 				n = free_entries;
 			}
 		}
@@ -488,15 +440,11 @@ __rte_ring_mp_do_enqueue(struct rte_ring *r, void * const *obj_table,
 	rte_smp_wmb();
 
 	/* if we exceed the watermark */
-	if (unlikely(((mask + 1) - free_entries + n) > r->watermark)) {
+	if (unlikely(((mask + 1) - free_entries + n) > r->watermark))
 		ret = (behavior == RTE_RING_QUEUE_FIXED) ? -EDQUOT :
 				(int)(n | RTE_RING_QUOT_EXCEED);
-		__RING_STAT_ADD(r, enq_quota, n);
-	}
-	else {
+	else
 		ret = (behavior == RTE_RING_QUEUE_FIXED) ? 0 : n;
-		__RING_STAT_ADD(r, enq_success, n);
-	}
 
 	/*
 	 * If there are other enqueues in progress that preceded us,
@@ -560,17 +508,12 @@ __rte_ring_sp_do_enqueue(struct rte_ring *r, void * const *obj_table,
 
 	/* check that we have enough room in ring */
 	if (unlikely(n > free_entries)) {
-		if (behavior == RTE_RING_QUEUE_FIXED) {
-			__RING_STAT_ADD(r, enq_fail, n);
+		if (behavior == RTE_RING_QUEUE_FIXED)
 			return -ENOBUFS;
-		}
 		else {
 			/* No free entry available */
-			if (unlikely(free_entries == 0)) {
-				__RING_STAT_ADD(r, enq_fail, n);
+			if (unlikely(free_entries == 0))
 				return 0;
-			}
-
 			n = free_entries;
 		}
 	}
@@ -583,15 +526,11 @@ __rte_ring_sp_do_enqueue(struct rte_ring *r, void * const *obj_table,
 	rte_smp_wmb();
 
 	/* if we exceed the watermark */
-	if (unlikely(((mask + 1) - free_entries + n) > r->watermark)) {
+	if (unlikely(((mask + 1) - free_entries + n) > r->watermark))
 		ret = (behavior == RTE_RING_QUEUE_FIXED) ? -EDQUOT :
 			(int)(n | RTE_RING_QUOT_EXCEED);
-		__RING_STAT_ADD(r, enq_quota, n);
-	}
-	else {
+	else
 		ret = (behavior == RTE_RING_QUEUE_FIXED) ? 0 : n;
-		__RING_STAT_ADD(r, enq_success, n);
-	}
 
 	r->prod.tail = prod_next;
 	return ret;
@@ -655,16 +594,11 @@ __rte_ring_mc_do_dequeue(struct rte_ring *r, void **obj_table,
 
 		/* Set the actual entries for dequeue */
 		if (n > entries) {
-			if (behavior == RTE_RING_QUEUE_FIXED) {
-				__RING_STAT_ADD(r, deq_fail, n);
+			if (behavior == RTE_RING_QUEUE_FIXED)
 				return -ENOENT;
-			}
 			else {
-				if (unlikely(entries == 0)){
-					__RING_STAT_ADD(r, deq_fail, n);
+				if (unlikely(entries == 0))
 					return 0;
-				}
-
 				n = entries;
 			}
 		}
@@ -694,7 +628,6 @@ __rte_ring_mc_do_dequeue(struct rte_ring *r, void **obj_table,
 			sched_yield();
 		}
 	}
-	__RING_STAT_ADD(r, deq_success, n);
 	r->cons.tail = cons_next;
 
 	return behavior == RTE_RING_QUEUE_FIXED ? 0 : n;
@@ -741,16 +674,11 @@ __rte_ring_sc_do_dequeue(struct rte_ring *r, void **obj_table,
 	entries = prod_tail - cons_head;
 
 	if (n > entries) {
-		if (behavior == RTE_RING_QUEUE_FIXED) {
-			__RING_STAT_ADD(r, deq_fail, n);
+		if (behavior == RTE_RING_QUEUE_FIXED)
 			return -ENOENT;
-		}
 		else {
-			if (unlikely(entries == 0)){
-				__RING_STAT_ADD(r, deq_fail, n);
+			if (unlikely(entries == 0))
 				return 0;
-			}
-
 			n = entries;
 		}
 	}
@@ -762,7 +690,6 @@ __rte_ring_sc_do_dequeue(struct rte_ring *r, void **obj_table,
 	DEQUEUE_PTRS();
 	rte_smp_rmb();
 
-	__RING_STAT_ADD(r, deq_success, n);
 	r->cons.tail = cons_next;
 	return behavior == RTE_RING_QUEUE_FIXED ? 0 : n;
 }
diff --git a/test/test/test_ring.c b/test/test/test_ring.c
index 5f09097..3891f5d 100644
--- a/test/test/test_ring.c
+++ b/test/test/test_ring.c
@@ -763,412 +763,6 @@ test_ring_burst_basic(void)
 	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
  */
@@ -1335,10 +929,6 @@ test_ring(void)
 	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;
-- 
2.9.3