diff options
| author | Thadeu Lima de Souza Cascardo <cascardo@redhat.com> | 2016-09-16 01:11:53 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-09-19 05:14:01 +0300 |
| commit | db74a3335e0f645e3139c80bcfc90feb01d8e304 (patch) | |
| tree | 5adec60da4faa80b188cc0b45639224c0a197db4 /net/openvswitch/flow.h | |
| parent | 40773966ccf1985a1b2bb570a03cbeaf1cbd4e00 (diff) | |
| download | linux-db74a3335e0f645e3139c80bcfc90feb01d8e304.tar.xz | |
openvswitch: use percpu flow stats
Instead of using flow stats per NUMA node, use it per CPU. When using
megaflows, the stats lock can be a bottleneck in scalability.
On a E5-2690 12-core system, usual throughput went from ~4Mpps to
~15Mpps when forwarding between two 40GbE ports with a single flow
configured on the datapath.
This has been tested on a system with possible CPUs 0-7,16-23. After
module removal, there were no corruption on the slab cache.
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@redhat.com>
Cc: pravin shelar <pshelar@ovn.org>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/openvswitch/flow.h')
| -rw-r--r-- | net/openvswitch/flow.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/openvswitch/flow.h b/net/openvswitch/flow.h index 156a3029c17b..ae783f5c6695 100644 --- a/net/openvswitch/flow.h +++ b/net/openvswitch/flow.h @@ -178,14 +178,14 @@ struct sw_flow { struct hlist_node node[2]; u32 hash; } flow_table, ufid_table; - int stats_last_writer; /* NUMA-node id of the last writer on + int stats_last_writer; /* CPU id of the last writer on * 'stats[0]'. */ struct sw_flow_key key; struct sw_flow_id id; struct sw_flow_mask *mask; struct sw_flow_actions __rcu *sf_acts; - struct flow_stats __rcu *stats[]; /* One for each NUMA node. First one + struct flow_stats __rcu *stats[]; /* One for each CPU. First one * is allocated at flow creation time, * the rest are allocated on demand * while holding the 'stats[0].lock'. |