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ring: allow non power-of-2 sizes
[dpdk.git]
/
lib
/
librte_ring
/
rte_ring.c
diff --git
a/lib/librte_ring/rte_ring.c
b/lib/librte_ring/rte_ring.c
index
6f58faf
..
036467f
100644
(file)
--- 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->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;
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;
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);
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;
ring_size = rte_ring_get_memsize(count);
if (ring_size < 0) {
rte_errno = ring_size;
@@
-195,7
+214,7
@@
rte_ring_create(const char *name, unsigned count, int socket_id,
r = mz->addr;
/* no need to check return value here, we already checked the
* arguments above */
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;
te->data = (void *) r;
r->memzone = mz;
@@
-263,6
+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, "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);
fprintf(f, " ct=%"PRIu32"\n", r->cons.tail);
fprintf(f, " ch=%"PRIu32"\n", r->cons.head);
fprintf(f, " pt=%"PRIu32"\n", r->prod.tail);