[PATCH v11 1/7] test/ring: fix failure with custom number of lcores

[Konstantin Ananyev]

ring_stress_autotest fails to initialize the ring when RTE_MAX_LCORE value
is not a number of 2.
There is a flaw in calculation required number of elements in the ring.
Fix it by aligning number of elements to next power of 2.

Fixes: bf28df24e915 ("test/ring: add contention stress test")
Cc: stable at dpdk.org

Reported-by: Phanendra Vukkisala <pvukkisala at marvell.com>
Signed-off-by: Konstantin Ananyev <konstantin.ananyev at huawei.com>
Acked-by: Morten Brørup <mb at smartsharesystems.com>
Acked-by: Stephen Hemminger <stephen at networkplumber.org>
---
 app/test/test_ring_stress_impl.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/test/test_ring_stress_impl.h b/app/test/test_ring_stress_impl.h
index 8b0bfb11fe..ee5274aeef 100644
--- a/app/test/test_ring_stress_impl.h
+++ b/app/test/test_ring_stress_impl.h
@@ -297,7 +297,7 @@ mt1_init(struct rte_ring **rng, void **data, uint32_t num)
 	*data = elm;
 
 	/* alloc ring */
-	nr = 2 * num;
+	nr = rte_align32pow2(2 * num);
 	sz = rte_ring_get_memsize(nr);
 	r = rte_zmalloc(NULL, sz, alignof(typeof(*r)));
 	if (r == NULL) {
-- 
2.35.3