dpif-netdev: Reorder elements in dp_netdev_port structure.

By reordering the data elements in dp_netdev_port structure, pad bytes can be reduced and there by saving a cache line. Before: structure size:136, holes:3, sum padbytes:15, cachelines:3 After: structure size:128, holes:2, sum padbytes:7, cachelines:2 Signed-off-by: Bhanuprakash Bodireddy <[email protected]> Co-authored-by: Antonio Fischetti <[email protected]> Signed-off-by: Antonio Fischetti <[email protected]> Acked-by: Daniele Di Proietto <[email protected]>
water0615 · Oct 18, 2016 · 2e4450a · 2e4450a
1 parent 38ee081
commit 2e4450a
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/lib/dpif-netdev.c b/lib/dpif-netdev.c
@@ -290,8 +290,8 @@ struct dp_netdev_port {
     struct netdev *netdev;
     struct hmap_node node;      /* Node in dp_netdev's 'ports'. */
     struct netdev_saved_flags *sf;
-    unsigned n_rxq;             /* Number of elements in 'rxq' */
     struct dp_netdev_rxq *rxqs;
+    unsigned n_rxq;             /* Number of elements in 'rxq' */
     bool dynamic_txqs;          /* If true XPS will be used. */
     unsigned *txq_used;         /* Number of threads that uses each tx queue. */
     struct ovs_mutex txq_used_mutex;