summaryrefslogtreecommitdiffstats
path: root/lib/librte_ring/rte_ring.c
diff options
context:
space:
mode:
Diffstat (limited to 'lib/librte_ring/rte_ring.c')
-rw-r--r--lib/librte_ring/rte_ring.c29
1 files changed, 25 insertions, 4 deletions
diff --git a/lib/librte_ring/rte_ring.c b/lib/librte_ring/rte_ring.c
index 5f98c33f..036467f4 100644
--- a/lib/librte_ring/rte_ring.c
+++ b/lib/librte_ring/rte_ring.c
@@ -140,8 +140,22 @@ rte_ring_init(struct rte_ring *r, const char *name, unsigned count,
r->flags = flags;
r->prod.single = (flags & RING_F_SP_ENQ) ? __IS_SP : __IS_MP;
r->cons.single = (flags & RING_F_SC_DEQ) ? __IS_SC : __IS_MC;
- r->size = count;
- r->mask = count - 1;
+
+ if (flags & RING_F_EXACT_SZ) {
+ r->size = rte_align32pow2(count + 1);
+ r->mask = r->size - 1;
+ r->capacity = count;
+ } else {
+ if ((!POWEROF2(count)) || (count > RTE_RING_SZ_MASK)) {
+ RTE_LOG(ERR, RING,
+ "Requested size is invalid, must be power of 2, and not exceed the size limit %u\n",
+ RTE_RING_SZ_MASK);
+ return -EINVAL;
+ }
+ r->size = count;
+ r->mask = count - 1;
+ r->capacity = r->mask;
+ }
r->prod.head = r->cons.head = 0;
r->prod.tail = r->cons.tail = 0;
@@ -160,10 +174,15 @@ rte_ring_create(const char *name, unsigned count, int socket_id,
ssize_t ring_size;
int mz_flags = 0;
struct rte_ring_list* ring_list = NULL;
+ const unsigned int requested_count = count;
int ret;
ring_list = RTE_TAILQ_CAST(rte_ring_tailq.head, rte_ring_list);
+ /* for an exact size ring, round up from count to a power of two */
+ if (flags & RING_F_EXACT_SZ)
+ count = rte_align32pow2(count + 1);
+
ring_size = rte_ring_get_memsize(count);
if (ring_size < 0) {
rte_errno = ring_size;
@@ -189,12 +208,13 @@ rte_ring_create(const char *name, unsigned count, int socket_id,
/* reserve a memory zone for this ring. If we can't get rte_config or
* we are secondary process, the memzone_reserve function will set
* rte_errno for us appropriately - hence no check in this this function */
- mz = rte_memzone_reserve(mz_name, ring_size, socket_id, mz_flags);
+ mz = rte_memzone_reserve_aligned(mz_name, ring_size, socket_id,
+ mz_flags, __alignof__(*r));
if (mz != NULL) {
r = mz->addr;
/* no need to check return value here, we already checked the
* arguments above */
- rte_ring_init(r, name, count, flags);
+ rte_ring_init(r, name, requested_count, flags);
te->data = (void *) r;
r->memzone = mz;
@@ -262,6 +282,7 @@ rte_ring_dump(FILE *f, const struct rte_ring *r)
fprintf(f, "ring <%s>@%p\n", r->name, r);
fprintf(f, " flags=%x\n", r->flags);
fprintf(f, " size=%"PRIu32"\n", r->size);
+ fprintf(f, " capacity=%"PRIu32"\n", r->capacity);
fprintf(f, " ct=%"PRIu32"\n", r->cons.tail);
fprintf(f, " ch=%"PRIu32"\n", r->cons.head);
fprintf(f, " pt=%"PRIu32"\n", r->prod.tail);