mlx5: fix RETA table size

When the number of RX queues is not a power of two,
the RETA table is configured to its maximum size for
better balancing.

Testing showed that limiting its size to 256 improves performance
noticeably with little to no  impact on balancing results.

Fixes: ebb30ec64a68 ("mlx5: increase RETA table size")

Signed-off-by: Yaacov Hazan <yaacovh@mellanox.com>
Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>

diff --git a/drivers/net/mlx5/mlx5_defs.h b/drivers/net/mlx5/mlx5_defs.h
index 195440c..09207d9 100644 (file)
--- a/drivers/net/mlx5/mlx5_defs.h
+++ b/drivers/net/mlx5/mlx5_defs.h
@@ -52,7 +52,7 @@
 #define MLX5_PMD_TX_PER_COMP_REQ 64
 
 /* RSS Indirection table size. */
-#define RSS_INDIRECTION_TABLE_SIZE 512
+#define RSS_INDIRECTION_TABLE_SIZE 256
 
 /* Maximum number of Scatter/Gather Elements per Work Request. */
 #ifndef MLX5_PMD_SGE_WR_N