[dpdk-dev] [PATCH 2/4] vdpa/mlx5: default polling mode delay time to zero

[Xueming Li]

To improve performance and latency, this patch set Rx polling mode
default delay time to zero.

Signed-off-by: Xueming Li <xuemingl at nvidia.com>
Acked-by: Matan Azrad <matan at nvidia.com>
---
 drivers/vdpa/mlx5/mlx5_vdpa.h       | 2 +-
 drivers/vdpa/mlx5/mlx5_vdpa_event.c | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/vdpa/mlx5/mlx5_vdpa.h b/drivers/vdpa/mlx5/mlx5_vdpa.h
index d039ada65b..08e04a86c4 100644
--- a/drivers/vdpa/mlx5/mlx5_vdpa.h
+++ b/drivers/vdpa/mlx5/mlx5_vdpa.h
@@ -36,7 +36,7 @@
 #define VIRTIO_F_RING_PACKED 34
 #endif
 
-#define MLX5_VDPA_DEFAULT_TIMER_DELAY_US 100u
+#define MLX5_VDPA_DEFAULT_TIMER_DELAY_US 0u
 #define MLX5_VDPA_DEFAULT_TIMER_STEP_US 1u
 
 struct mlx5_vdpa_cq {
diff --git a/drivers/vdpa/mlx5/mlx5_vdpa_event.c b/drivers/vdpa/mlx5/mlx5_vdpa_event.c
index 3aeaeb893f..5366937e03 100644
--- a/drivers/vdpa/mlx5/mlx5_vdpa_event.c
+++ b/drivers/vdpa/mlx5/mlx5_vdpa_event.c
@@ -265,7 +265,8 @@ mlx5_vdpa_timer_sleep(struct mlx5_vdpa_priv *priv, uint32_t max)
 			break;
 		}
 	}
-	usleep(priv->timer_delay_us);
+	if (priv->timer_delay_us)
+		usleep(priv->timer_delay_us);
 }
 
 static void *
-- 
2.25.1