Accumulate the sent packets and sent bytes in local variables and perform a
single u64_stats_update_begin/end() after.
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>
Cc: Michael S. Tsirkin <mst@xxxxxxxxxx>
Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
---
drivers/net/virtio_net.c | 12 ++++++++----
1 files changed, 8 insertions(+), 4 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 3d0ce44..a4d56b8 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -833,17 +833,21 @@ static void free_old_xmit_skbs(struct send_queue *sq)
unsigned int len;
struct virtnet_info *vi = sq->vq->vdev->priv;
struct virtnet_stats *stats = this_cpu_ptr(vi->stats);
+ u64 tx_bytes = 0, tx_packets = 0;
while ((skb = virtqueue_get_buf(sq->vq, &len)) != NULL) {
pr_debug("Sent skb %p\n", skb);
- u64_stats_update_begin(&stats->tx_syncp);
- stats->tx_bytes += skb->len;
- stats->tx_packets++;
- u64_stats_update_end(&stats->tx_syncp);
+ tx_bytes += skb->len;
+ tx_packets++;
dev_kfree_skb_any(skb);
}
+
+ u64_stats_update_begin(&stats->tx_syncp);
+ stats->tx_bytes += tx_bytes;
+ stats->tx_packets =+ tx_packets;
+ u64_stats_update_end(&stats->tx_syncp);
}
static int xmit_skb(struct send_queue *sq, struct sk_buff *skb)
--
1.7.1
_______________________________________________
Virtualization mailing list
Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
https://lists.linuxfoundation.org/mailman/listinfo/virtualization
