[PATCH v1] gpudev: remove unnecessary rte_gpu_wmb

[eagostini at nvidia.com]

From: Elena Agostini <eagostini at nvidia.com>

Remove unnecessary rte_gpu_wmb from rte_gpu_comm_populate_list_pkts.
It causes a performance degradation in case of NVIDIA GPU V100.

This change doesn't affect any functionality as the status resides
in CPU registered memory.

Fixes: c7ebd65c1372 ("gpudev: add communication list")

Signed-off-by: Elena Agostini <eagostini at nvidia.com>
---
 lib/gpudev/gpudev.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/lib/gpudev/gpudev.c b/lib/gpudev/gpudev.c
index 1d8200e71b..9ae36dbae9 100644
--- a/lib/gpudev/gpudev.c
+++ b/lib/gpudev/gpudev.c
@@ -877,7 +877,6 @@ rte_gpu_comm_populate_list_pkts(struct rte_gpu_comm_list *comm_list_item,
 	RTE_GPU_VOLATILE(comm_list_item->num_pkts) = num_mbufs;
 	rte_gpu_wmb(comm_list_item->dev_id);
 	RTE_GPU_VOLATILE(comm_list_item->status) = RTE_GPU_COMM_LIST_READY;
-	rte_gpu_wmb(comm_list_item->dev_id);
 
 	return 0;
 }
-- 
2.17.1