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| sdcbeeb | Is there an easy way to see traffic information within Open vSwitch? Using Grizzly and some nodes exhibit higher load than I would expect based on CPU usage, memory usage and I/O. Thinking that maybe the load is due to internal Open vSwitch traffic but I can't see what is going on so it is just a theory at this point. | 14:36 |
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| andyhky | sdcbeeb: what version of OVS? | 14:42 |
| andyhky | 1) ovs-vswitchd CPU usage (`top` can help this) 2) if OVS is dropping packets on the floor, you can run `ovs-dpctl show` and see the lost:#### line incrementing. | 14:44 |
| sdcbeeb | ovs-vswitchd doesn't seem to be using a lot of CPU when this happens. I'll check out ovs-dpctl. Is there any web interface like you'd see with a physical switch? I'm used to HP switches with either the terminal or web interface. I'll see if I can get familiar with the ovs- commands to check port counts. What does it indicate if you do see dropped packets? I do see dropped RX packets on some of the tap interfaces using i | 14:54 |
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| sdcbeeb | On the heavily loaded node for br-int I see: lookups: hit:5099056181 missed:2937707722 lost:1822848737. Load is pretty low right now. missed cntinues to go up but lost is stable. | 15:00 |
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| andyhky | sdcbeeb: if ovs-vswitchd isn't hogging CPU/dropping in the scenarios I'd lean toward something else | 15:22 |
| sdcbeeb | I do see lots of drops. What kind of load would it take for ovs-switchd to start dropping packets? | 15:28 |
| sdcbeeb | And what does "missed" refer to? Is that a concern? | 15:29 |
| sdcbeeb | Just looked at the man page. It looks like "missed" is ok. | 15:31 |
| sdcbeeb | currently ovs-switchd is at 20% CPU on all four nodes | 15:42 |
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| sdcbeeb | andyhky: I just saw your qestion asking what version of OVS: 1.9.0. | 19:27 |
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| sdcbeeb | I'm running into the issue right now. The load on one node (64 physical AMD cores, 283 virtual cores being used. CPU load is just 7% but load is 67. plenty of free RAM, 0.0% Waiting but 4% System. The VM's are sluggish. Many of them are Windows VMs. | 19:30 |
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| sdcbeeb | Does anyone have experience hosting Windows VM's in OpenStack? I have a node that has close to 100 of them and when people start using them, even though they aren't using a whole lot of CPU, the load of the node goes up and the VM's are sluggish. Any thoughts on this? | 20:47 |
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