From 2e4450aa35c6e7a9c97c930f5d43028cfbfbe07f Mon Sep 17 00:00:00 2001 From: Bhanuprakash Bodireddy Date: Fri, 14 Oct 2016 15:37:11 +0100 Subject: [PATCH] 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 Co-authored-by: Antonio Fischetti Signed-off-by: Antonio Fischetti Acked-by: Daniele Di Proietto --- lib/dpif-netdev.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/dpif-netdev.c b/lib/dpif-netdev.c index 10cc55c06fe..8fd98baeb13 100644 --- 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;