[PATCH/libmlx4] Use BlueFlame for RDMA_WRITE_WITH_IMM without data requests too

Commit Message

Dotan Barak July 11, 2011, 11:02 a.m. UTC

Use BlueFlame for RDMA Write with immediate without any data (no s/g) too.
This improves latency.

Signed-off-by: Dotan Barak <[e-mail]>
Reviewed-by: Jack Morgenstein <[e-mail]>
---
 src/qp.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)

Patch

diff --git a/src/qp.c b/src/qp.c
index e046da1..10ccbff 100644
--- a/src/qp.c
+++ b/src/qp.c
@@ -283,8 +283,11 @@  int mlx4_post_send(struct ibv_qp *ibqp, struct ibv_send_wr *wr,
 			case IBV_WR_RDMA_READ:
 				inl = 1;
 				/* fall through */
-			case IBV_WR_RDMA_WRITE:
 			case IBV_WR_RDMA_WRITE_WITH_IMM:
+				if (!wr->num_sge)
+					inl = 1;
+				/* fall through */
+			case IBV_WR_RDMA_WRITE:
 				set_raddr_seg(wqe, wr->wr.rdma.remote_addr,
 					      wr->wr.rdma.rkey);
 				wqe  += sizeof (struct mlx4_wqe_raddr_seg);