[dpdk-dev] [PATCH] virtio: use pointer to replace memcpy
Zhiyong Yang
zhiyong.yang at intel.com
Fri Aug 11 04:13:18 CEST 2017
To use pointer instead of memcpy can save many cycles in the funciton
virtio_send_command.
cc: maxime.coquelin at redhat.com
cc: yliu at fridaylinux.org
Signed-off-by: Zhiyong Yang <zhiyong.yang at intel.com>
---
drivers/net/virtio/virtio_ethdev.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index e320811ed..dff3c4de4 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -162,7 +162,7 @@ virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
uint32_t head, i;
int k, sum = 0;
virtio_net_ctrl_ack status = ~0;
- struct virtio_pmd_ctrl result;
+ struct virtio_pmd_ctrl *result;
struct virtqueue *vq;
ctrl->status = status;
@@ -253,10 +253,9 @@ virtio_send_command(struct virtnet_ctl *cvq, struct virtio_pmd_ctrl *ctrl,
PMD_INIT_LOG(DEBUG, "vq->vq_free_cnt=%d\nvq->vq_desc_head_idx=%d",
vq->vq_free_cnt, vq->vq_desc_head_idx);
- memcpy(&result, cvq->virtio_net_hdr_mz->addr,
- sizeof(struct virtio_pmd_ctrl));
+ result = cvq->virtio_net_hdr_mz->addr;
- return result.status;
+ return result->status;
}
static int
--
2.13.3
More information about the dev
mailing list