100% CPU load with device scanning enabled

[Kees Meijs]

Hi again,

Placing the routes in another table works fine:

> # ip r s ta 10 | wc -l
> 744892

Meanwhile in the default table:

> # ip r s | wc -l
> 3

However it seems the Open vSwitch daemon is again triggered and polls to
synchronise the routes.

Still eating it's way through a CPU thread:

> top - 08:47:02 up 6 min,  1 user,  load average: 1,11, 0,83, 0,40
> Tasks: 123 total,   2 running, 121 sleeping,   0 stopped,   0 zombie
> %Cpu(s): 15,5 us, 11,3 sy,  0,0 ni, 73,2 id,  0,0 wa,  0,0 hi,  0,0
> si,  0,0 st
> KiB Mem : 32929556 total, 31573996 free,  1259204 used,    96356
> buff/cache
> KiB Swap:        0 total,        0 free,        0 used. 31347300 avail
> Mem
>
>   PID USER      PR  NI    VIRT    RES    SHR S  *%CPU* %MEM     TIME+
> COMMAND                                                                 
>   772 root      10 -10 1234200 884504   8440 R *105,0*  2,7   6:08.68
> ovs-vswitchd                                                           

I believe it's a good thing to fix Open vSwitch (not BIRD) but meanwhile
I'll try to figure out another approach, maybe using virtualisation to
separate the physical world from the routing process.

If there's any future testing or debugging to do I'm glad to help and
make a test lab.

Regards,
Kees

On 07-05-19 07:22, Kees Meijs wrote:
> Hopefully I'll be able to configure VRFs today and'll if that helps.

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