I could confirm that I could observe this bug definitely on Liberty on following services: neutron-server, nova-conductor. I couldn't confirm that for other because it requires additional monitoring/debugging. Steps to reproduce for neutron-server:
1.Deploy new cloud. 2. Measure CPU and MEM usage by neutron-server and take a look on strace of any pid which is associated with RPC worker. 3. Create 200-400 networks with routers. 4. Spawn 10000 vms (not at once, you could just spawn and delete them by 10-20 pcs). 5. Delete everything (networks, routers, vms). 6. Measure CPU/MEM usage and take a look on strace of neutron-server RPC worker. Expected behavior: Everything should be the same as at step 2 with non-significant changes in CPU/MEM. Observer behavior: Huge CPU load (1-2 cores), huge MEMORY load (6-7Gb) without doing anything useful at the moment ;) Stracing of RPC thread will show ~1k per second of EPOLL_WAITs with 0 timeout. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1518430 Title: liberty: ~busy loop on epoll_wait being called with zero timeout To manage notifications about this bug go to: https://bugs.launchpad.net/mos/+bug/1518430/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
