Hi,
Previously, we used ovs 1.4.x and found ovs-vswitchd dropping logs. Then we upgraded to ovs 1.11.0 as suggested on this mailing list. We did observe drop of the CPU utilization on host. However, we still randomly found ovs-vswitchd dropping logs. Some ovs logs are pasted below. I have two questions: 1) As megaflow was introduced in ovs 1.11.0, I'm wondering whether megaflow is transparent to userspace? i.e. is there any specific requirement on flow configuration so that we can fully utilize the power of megaflow? 2) As logs show, we persistently observed "failed to flow_del" messages in our ovs logs. I'm wondering what's the cause for this warning message? Looking forward to your kind help. Many thanks. Jian Qiu === ovs logs ==== 2013-10-18T04:00:23Z|4395745|dpif|WARN|Dropped 1120 log messages in last 1 seconds (most recently, 1 seconds ago) due to excessive rate 2013-10-18T04:00:23Z|4395746|dpif|WARN|system@ovs-system: failed to flow_del (No such file or directory) skb_priority(0),in_port(10),skb_mark(0),eth(src=54:25:8a:6c:5b:9d,dst=00:22:16:3b:ec:0d),eth_type(0x0800),ipv4(src=10.64.13.218,dst=10.64.15.204,proto=6,tos=0,ttl=63,frag=no),tcp(src=4401,dst=49559) 2013-10-18T04:00:24Z|4395747|dpif|WARN|Dropped 1120 log messages in last 1 seconds (most recently, 1 seconds ago) due to excessive rate 2013-10-18T04:00:24Z|4395748|dpif|WARN|system@ovs-system: failed to flow_del (No such file or directory) skb_priority(0),in_port(10),skb_mark(0),eth(src=54:25:8a:6c:5b:9d,dst=00:22:16:3b:ec:0d),eth_type(0x0800),ipv4(src=10.64.13.218,dst=10.64.15.204,proto=6,tos=0,ttl=63,frag=no),tcp(src=4401,dst=49559) 2013-10-18T04:00:25Z|4395749|dpif|WARN|Dropped 1120 log messages in last 1 seconds (most recently, 1 seconds ago) due to excessive rate 2013-10-18T04:00:25Z|4395750|dpif|WARN|system@ovs-system: f2013-10-18T15:03:18Z|00001|vlog|INFO|opened log file /usr/local/var/log/openvswitch/ovs-vswitchd.log
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