I know this has been open for a year now, but for what it's worth, we're seeing the same issue on two of our three Neutron nodes. A whole lot of entries in /var/log/openvswitch/ovs-vswitchd.log like the following:
2020-05-22T00:19:25.581Z|18410|poll_loop(handler74)|INFO|Dropped 2973816 log messages in last 6 seconds (most recently, 0 seconds ago) due to excessive rate 2020-05-22T00:19:25.581Z|18411|poll_loop(handler74)|INFO|wakeup due to [POLLIN] on fd 35 (unknown anon_inode:[eventpoll]) at ../lib/dpif-netlink.c:2786 (98% CPU usage) We're running Neutron in Rocky on Ubuntu 18.04: # uname -r 4.15.0-99-generic # dpkg -l | grep openvswitch- ii neutron-openvswitch-agent 2:13.0.6-0ubuntu1~cloud0 all Neutron is a virtual network service for Openstack - Open vSwitch plugin agent ii openvswitch-common 2.10.0-0ubuntu2~cloud0 amd64 Open vSwitch common components ii openvswitch-switch 2.10.0-0ubuntu2~cloud0 amd64 Open vSwitch switch implementations Looking at the ovs-vswitchd process itself: # timeout 10 strace -c -p 1227 strace: Process 1227 attached strace: Process 1227 detached % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 96.28 9.059391 28852 314 poll 3.03 0.284833 284833 1 restart_syscall 0.28 0.026164 13 1968 sendmsg 0.27 0.025726 67 385 208 recvfrom 0.07 0.006302 3 2220 252 recvmsg 0.02 0.002327 7 315 69 read 0.02 0.002157 2 930 171 futex 0.02 0.002075 5 378 378 accept 0.01 0.000532 2 316 getrusage 0.00 0.000238 14 17 sendto 0.00 0.000034 11 3 write ------ ----------- ----------- --------- --------- ---------------- 100.00 9.409779 6847 1078 total -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1827264 Title: ovs-vswitchd thread consuming 100% CPU To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openvswitch/+bug/1827264/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs