[dpdk-dev] [PATCH v6 09/10] mempool/bucket: handle non-EAL lcores

[David Marchand <david.marchand@redhat.com>]

Convert to new lcore API to support non-EAL lcores.

Signed-off-by: David Marchand <david.marchand@redhat.com>
Reviewed-by: Andrew Rybchenko <arybchenko@solarflare.com>
---
Changes since v3:
- addressed Andrew comments,

---
 drivers/mempool/bucket/rte_mempool_bucket.c | 130 ++++++++++++--------
 1 file changed, 81 insertions(+), 49 deletions(-)

diff --git a/drivers/mempool/bucket/rte_mempool_bucket.c b/drivers/mempool/bucket/rte_mempool_bucket.c
index 5ce1ef16fb..8b9daa9782 100644
--- a/drivers/mempool/bucket/rte_mempool_bucket.c
+++ b/drivers/mempool/bucket/rte_mempool_bucket.c
@@ -55,6 +55,7 @@ struct bucket_data {
 	struct rte_ring *shared_orphan_ring;
 	struct rte_mempool *pool;
 	unsigned int bucket_mem_size;
+	void *lcore_callback_handle;
 };
 
 static struct bucket_stack *
@@ -345,6 +346,23 @@ bucket_dequeue_contig_blocks(struct rte_mempool *mp, void **first_obj_table,
 	return 0;
 }
 
+struct bucket_count_per_lcore_ctx {
+	const struct bucket_data *bd;
+	unsigned int count;
+};
+
+static int
+bucket_count_per_lcore(unsigned int lcore_id, void *arg)
+{
+	struct bucket_count_per_lcore_ctx *bplc = arg;
+
+	bplc->count += bplc->bd->obj_per_bucket *
+		bplc->bd->buckets[lcore_id]->top;
+	bplc->count +=
+		rte_ring_count(bplc->bd->adoption_buffer_rings[lcore_id]);
+	return 0;
+}
+
 static void
 count_underfilled_buckets(struct rte_mempool *mp,
 			  void *opaque,
@@ -373,23 +391,64 @@ count_underfilled_buckets(struct rte_mempool *mp,
 static unsigned int
 bucket_get_count(const struct rte_mempool *mp)
 {
-	const struct bucket_data *bd = mp->pool_data;
-	unsigned int count =
-		bd->obj_per_bucket * rte_ring_count(bd->shared_bucket_ring) +
-		rte_ring_count(bd->shared_orphan_ring);
-	unsigned int i;
+	struct bucket_count_per_lcore_ctx bplc;
 
-	for (i = 0; i < RTE_MAX_LCORE; i++) {
-		if (!rte_lcore_is_enabled(i))
-			continue;
-		count += bd->obj_per_bucket * bd->buckets[i]->top +
-			rte_ring_count(bd->adoption_buffer_rings[i]);
-	}
+	bplc.bd = mp->pool_data;
+	bplc.count = bplc.bd->obj_per_bucket *
+		rte_ring_count(bplc.bd->shared_bucket_ring);
+	bplc.count += rte_ring_count(bplc.bd->shared_orphan_ring);
 
+	rte_lcore_iterate(bucket_count_per_lcore, &bplc);
 	rte_mempool_mem_iter((struct rte_mempool *)(uintptr_t)mp,
-			     count_underfilled_buckets, &count);
+			     count_underfilled_buckets, &bplc.count);
+
+	return bplc.count;
+}
+
+static int
+bucket_init_per_lcore(unsigned int lcore_id, void *arg)
+{
+	char rg_name[RTE_RING_NAMESIZE];
+	struct bucket_data *bd = arg;
+	struct rte_mempool *mp;
+	int rg_flags;
+	int rc;
+
+	mp = bd->pool;
+	bd->buckets[lcore_id] = bucket_stack_create(mp,
+		mp->size / bd->obj_per_bucket);
+	if (bd->buckets[lcore_id] == NULL)
+		goto error;
+
+	rc = snprintf(rg_name, sizeof(rg_name), RTE_MEMPOOL_MZ_FORMAT ".a%u",
+		mp->name, lcore_id);
+	if (rc < 0 || rc >= (int)sizeof(rg_name))
+		goto error;
+
+	rg_flags = RING_F_SC_DEQ;
+	if (mp->flags & MEMPOOL_F_SP_PUT)
+		rg_flags |= RING_F_SP_ENQ;
+	bd->adoption_buffer_rings[lcore_id] = rte_ring_create(rg_name,
+		rte_align32pow2(mp->size + 1), mp->socket_id, rg_flags);
+	if (bd->adoption_buffer_rings[lcore_id] == NULL)
+		goto error;
 
-	return count;
+	return 0;
+error:
+	rte_free(bd->buckets[lcore_id]);
+	bd->buckets[lcore_id] = NULL;
+	return -1;
+}
+
+static void
+bucket_uninit_per_lcore(unsigned int lcore_id, void *arg)
+{
+	struct bucket_data *bd = arg;
+
+	rte_ring_free(bd->adoption_buffer_rings[lcore_id]);
+	bd->adoption_buffer_rings[lcore_id] = NULL;
+	rte_free(bd->buckets[lcore_id]);
+	bd->buckets[lcore_id] = NULL;
 }
 
 static int
@@ -399,7 +458,6 @@ bucket_alloc(struct rte_mempool *mp)
 	int rc = 0;
 	char rg_name[RTE_RING_NAMESIZE];
 	struct bucket_data *bd;
-	unsigned int i;
 	unsigned int bucket_header_size;
 	size_t pg_sz;
 
@@ -429,36 +487,17 @@ bucket_alloc(struct rte_mempool *mp)
 	/* eventually this should be a tunable parameter */
 	bd->bucket_stack_thresh = (mp->size / bd->obj_per_bucket) * 4 / 3;
 
+	bd->lcore_callback_handle = rte_lcore_callback_register("bucket",
+		bucket_init_per_lcore, bucket_uninit_per_lcore, bd);
+	if (bd->lcore_callback_handle == NULL) {
+		rc = -ENOMEM;
+		goto no_mem_for_stacks;
+	}
+
 	if (mp->flags & MEMPOOL_F_SP_PUT)
 		rg_flags |= RING_F_SP_ENQ;
 	if (mp->flags & MEMPOOL_F_SC_GET)
 		rg_flags |= RING_F_SC_DEQ;
-
-	for (i = 0; i < RTE_MAX_LCORE; i++) {
-		if (!rte_lcore_is_enabled(i))
-			continue;
-		bd->buckets[i] =
-			bucket_stack_create(mp, mp->size / bd->obj_per_bucket);
-		if (bd->buckets[i] == NULL) {
-			rc = -ENOMEM;
-			goto no_mem_for_stacks;
-		}
-		rc = snprintf(rg_name, sizeof(rg_name),
-			      RTE_MEMPOOL_MZ_FORMAT ".a%u", mp->name, i);
-		if (rc < 0 || rc >= (int)sizeof(rg_name)) {
-			rc = -ENAMETOOLONG;
-			goto no_mem_for_stacks;
-		}
-		bd->adoption_buffer_rings[i] =
-			rte_ring_create(rg_name, rte_align32pow2(mp->size + 1),
-					mp->socket_id,
-					rg_flags | RING_F_SC_DEQ);
-		if (bd->adoption_buffer_rings[i] == NULL) {
-			rc = -rte_errno;
-			goto no_mem_for_stacks;
-		}
-	}
-
 	rc = snprintf(rg_name, sizeof(rg_name),
 		      RTE_MEMPOOL_MZ_FORMAT ".0", mp->name);
 	if (rc < 0 || rc >= (int)sizeof(rg_name)) {
@@ -498,11 +537,8 @@ bucket_alloc(struct rte_mempool *mp)
 	rte_ring_free(bd->shared_orphan_ring);
 cannot_create_shared_orphan_ring:
 invalid_shared_orphan_ring:
+	rte_lcore_callback_unregister(bd->lcore_callback_handle);
 no_mem_for_stacks:
-	for (i = 0; i < RTE_MAX_LCORE; i++) {
-		rte_free(bd->buckets[i]);
-		rte_ring_free(bd->adoption_buffer_rings[i]);
-	}
 	rte_free(bd);
 no_mem_for_data:
 	rte_errno = -rc;
@@ -512,16 +548,12 @@ bucket_alloc(struct rte_mempool *mp)
 static void
 bucket_free(struct rte_mempool *mp)
 {
-	unsigned int i;
 	struct bucket_data *bd = mp->pool_data;
 
 	if (bd == NULL)
 		return;
 
-	for (i = 0; i < RTE_MAX_LCORE; i++) {
-		rte_free(bd->buckets[i]);
-		rte_ring_free(bd->adoption_buffer_rings[i]);
-	}
+	rte_lcore_callback_unregister(bd->lcore_callback_handle);
 
 	rte_ring_free(bd->shared_orphan_ring);
 	rte_ring_free(bd->shared_bucket_ring);
-- 
2.23.0