Use memory mapped Netlink i/o for all unicast openvswitch
communication if a ring has been set up.
Benchmark
* pktgen -> ovs internal port
* 5M pkts, 5M flows
* 4 threads, 8 cores
Before:
Result: OK: 67418743(c67108212+d310530) usec, 5000000 (9000byte,0frags)
74163pps 5339Mb/sec (5339736000bps) errors: 0
+ 2.98% ovs-vswitchd [k] copy_user_generic_string
+ 2.49% ovs-vswitchd [k] memcpy
+ 1.84% kpktgend_2 [k] memcpy
+ 1.81% kpktgend_1 [k] memcpy
+ 1.81% kpktgend_3 [k] memcpy
+ 1.78% kpktgend_0 [k] memcpy
After:
Result: OK: 24229690(c24127165+d102524) usec, 5000000 (9000byte,0frags)
206358pps 14857Mb/sec (14857776000bps) errors: 0
+ 2.80% ovs-vswitchd [k] memcpy
+ 1.31% kpktgend_2 [k] memcpy
+ 1.23% kpktgend_0 [k] memcpy
+ 1.09% kpktgend_1 [k] memcpy
+ 1.04% kpktgend_3 [k] memcpy
+ 0.96% ovs-vswitchd [k] copy_user_generic_string
Signed-off-by: Thomas Graf <tg...@suug.ch>
Reviewed-by: Daniel Borkmann <dbork...@redhat.com>
---
net/openvswitch/datapath.c | 56 ++++++++++++++++++++++++----------------------
1 file changed, 29 insertions(+), 27 deletions(-)
diff --git a/net/openvswitch/datapath.c b/net/openvswitch/datapath.c
index 6f5e1dd..0ac9cde 100644
--- a/net/openvswitch/datapath.c
+++ b/net/openvswitch/datapath.c
@@ -402,6 +402,11 @@ static int queue_userspace_packet(struct net *net, int
dp_ifindex,
struct sk_buff *nskb = NULL;
struct sk_buff *user_skb; /* to be queued to userspace */
struct nlattr *nla;
+ struct genl_info info = {
+ .dst_sk = net->genl_sock,
+ .snd_portid = upcall_info->portid,
+ };
+ size_t len;
int err;
if (vlan_tx_tag_present(skb)) {
@@ -422,7 +427,8 @@ static int queue_userspace_packet(struct net *net, int
dp_ifindex,
goto out;
}
- user_skb = genlmsg_new(upcall_msg_size(skb, upcall_info->userdata),
GFP_ATOMIC);
+ len = upcall_msg_size(skb, upcall_info->userdata);
+ user_skb = genlmsg_new_unicast(len, &info, GFP_ATOMIC);
if (!user_skb) {
err = -ENOMEM;
goto out;
@@ -726,27 +732,30 @@ error:
return err;
}
-static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow)
+static struct sk_buff *ovs_flow_cmd_alloc_info(struct sw_flow *flow,
+ struct genl_info *info)
{
- const struct sw_flow_actions *sf_acts;
+ size_t len;
- sf_acts = ovsl_dereference(flow->sf_acts);
+ len = ovs_flow_cmd_msg_size(ovsl_dereference(flow->sf_acts));
- return genlmsg_new(ovs_flow_cmd_msg_size(sf_acts), GFP_KERNEL);
+ return genlmsg_new_unicast(len, info, GFP_KERNEL);
}
static struct sk_buff *ovs_flow_cmd_build_info(struct sw_flow *flow,
struct datapath *dp,
- u32 portid, u32 seq, u8 cmd)
+ struct genl_info *info,
+ u8 cmd)
{
struct sk_buff *skb;
int retval;
- skb = ovs_flow_cmd_alloc_info(flow);
+ skb = ovs_flow_cmd_alloc_info(flow, info);
if (!skb)
return ERR_PTR(-ENOMEM);
- retval = ovs_flow_cmd_fill_info(flow, dp, skb, portid, seq, 0, cmd);
+ retval = ovs_flow_cmd_fill_info(flow, dp, skb, info->snd_portid,
+ info->snd_seq, 0, cmd);
BUG_ON(retval < 0);
return skb;
}
@@ -835,8 +844,7 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb,
struct genl_info *info)
goto err_flow_free;
}
- reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid,
- info->snd_seq,
OVS_FLOW_CMD_NEW);
+ reply = ovs_flow_cmd_build_info(flow, dp, info,
OVS_FLOW_CMD_NEW);
} else {
/* We found a matching flow. */
struct sw_flow_actions *old_acts;
@@ -864,8 +872,7 @@ static int ovs_flow_cmd_new_or_set(struct sk_buff *skb,
struct genl_info *info)
rcu_assign_pointer(flow->sf_acts, acts);
ovs_nla_free_flow_actions(old_acts);
- reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid,
- info->snd_seq, OVS_FLOW_CMD_NEW);
+ reply = ovs_flow_cmd_build_info(flow, dp, info,
OVS_FLOW_CMD_NEW);
/* Clear stats. */
if (a[OVS_FLOW_ATTR_CLEAR]) {
@@ -927,8 +934,7 @@ static int ovs_flow_cmd_get(struct sk_buff *skb, struct
genl_info *info)
goto unlock;
}
- reply = ovs_flow_cmd_build_info(flow, dp, info->snd_portid,
- info->snd_seq, OVS_FLOW_CMD_NEW);
+ reply = ovs_flow_cmd_build_info(flow, dp, info, OVS_FLOW_CMD_NEW);
if (IS_ERR(reply)) {
err = PTR_ERR(reply);
goto unlock;
@@ -975,7 +981,7 @@ static int ovs_flow_cmd_del(struct sk_buff *skb, struct
genl_info *info)
goto unlock;
}
- reply = ovs_flow_cmd_alloc_info(flow);
+ reply = ovs_flow_cmd_alloc_info(flow, info);
if (!reply) {
err = -ENOMEM;
goto unlock;
@@ -1127,17 +1133,17 @@ error:
return -EMSGSIZE;
}
-static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp, u32 portid,
- u32 seq, u8 cmd)
+static struct sk_buff *ovs_dp_cmd_build_info(struct datapath *dp,
+ struct genl_info *info, u8 cmd)
{
struct sk_buff *skb;
int retval;
- skb = genlmsg_new(ovs_dp_cmd_msg_size(), GFP_KERNEL);
+ skb = genlmsg_new_unicast(ovs_dp_cmd_msg_size(), info, GFP_KERNEL);
if (!skb)
return ERR_PTR(-ENOMEM);
- retval = ovs_dp_cmd_fill_info(dp, skb, portid, seq, 0, cmd);
+ retval = ovs_dp_cmd_fill_info(dp, skb, info->snd_portid, info->snd_seq,
0, cmd);
if (retval < 0) {
kfree_skb(skb);
return ERR_PTR(retval);
@@ -1232,8 +1238,7 @@ static int ovs_dp_cmd_new(struct sk_buff *skb, struct
genl_info *info)
goto err_destroy_ports_array;
}
- reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
- info->snd_seq, OVS_DP_CMD_NEW);
+ reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW);
err = PTR_ERR(reply);
if (IS_ERR(reply))
goto err_destroy_local_port;
@@ -1299,8 +1304,7 @@ static int ovs_dp_cmd_del(struct sk_buff *skb, struct
genl_info *info)
if (IS_ERR(dp))
goto unlock;
- reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
- info->snd_seq, OVS_DP_CMD_DEL);
+ reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_DEL);
err = PTR_ERR(reply);
if (IS_ERR(reply))
goto unlock;
@@ -1328,8 +1332,7 @@ static int ovs_dp_cmd_set(struct sk_buff *skb, struct
genl_info *info)
if (IS_ERR(dp))
goto unlock;
- reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
- info->snd_seq, OVS_DP_CMD_NEW);
+ reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW);
if (IS_ERR(reply)) {
err = PTR_ERR(reply);
genl_set_err(&dp_datapath_genl_family, sock_net(skb->sk), 0,
@@ -1360,8 +1363,7 @@ static int ovs_dp_cmd_get(struct sk_buff *skb, struct
genl_info *info)
goto unlock;
}
- reply = ovs_dp_cmd_build_info(dp, info->snd_portid,
- info->snd_seq, OVS_DP_CMD_NEW);
+ reply = ovs_dp_cmd_build_info(dp, info, OVS_DP_CMD_NEW);
if (IS_ERR(reply)) {
err = PTR_ERR(reply);
goto unlock;
--
1.8.3.1
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