net/mlx5: increase number of strides

If WQE ID is used in CQE for Multi-Packet RQ, the ratio of CQE compression
drops a little bit.  In order to reach to 100Gbps with 64B traffic, it is
needed to further save PCIe bandwidth by increasing the number of strides
in a WQE. It is now 64 by default but adjustable by a PMD parameter -
mprq_log_stride_num.

Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
Acked-by: Shahaf Shuler <shahafs@mellanox.com>

diff --git a/drivers/net/mlx5/mlx5_defs.h b/drivers/net/mlx5/mlx5_defs.h
index b52f7dc..5bbbec2 100644 (file)
--- a/drivers/net/mlx5/mlx5_defs.h
+++ b/drivers/net/mlx5/mlx5_defs.h
@@ -97,7 +97,7 @@
 #define MLX5_UAR_OFFSET (1ULL << 32)
 
 /* Log 2 of the default number of strides per WQE for Multi-Packet RQ. */
-#define MLX5_MPRQ_STRIDE_NUM_N 4U
+#define MLX5_MPRQ_STRIDE_NUM_N 6U
 
 /* Two-byte shift is disabled for Multi-Packet RQ. */
 #define MLX5_MPRQ_TWO_BYTE_SHIFT 0