[smokeping-users] Running smokeping inside a Virtual Machine

[Tobias Oetiker]

Hi Frank,

smokeping itself does not care about jumping real time clocks ...
but I guess fping which does the pingin in the default smokeping
setup could be rather unhappy about packets ariving with such huge
jitter ... 200ms is a hell of a lot of time ...

cheers
tobi

Today Frank Wegner wrote:

> Hi smokeping Experts,
>
>
>
> I like to know if you ever tried running smokeping inside a VMware virtual
> machine (Debian Linux guest OS).
>
>
>
> The effect I see is that when running smokeping on a physical box the network
> is fine, but when running smokeping from inside a virtual machine a lot of
> packets appear to be dropped. However, the network applications itself all
> seem to be fine.
>
>
>
> My guess is that maybe smokeping is very time sensitive. The virtual machine
> clock has time jumps and irregularities in the millisecond range (up to 200
> ms). So how well does smokeping cope with a system clock which does not
> constantly show the correct time? Could this explain that some packets appear
> as dropped (they could just have arrived at unexpected times)?
>
>
>
> Thanks a lot in advance,
>
> F
>
>
>
> Best Regards.
>
> Frank Wegner
> http://www.vmware.com <http://www.vmware.com>
>
> VMware Global Inc., Branch Office Germany
>
> Place: Unterschleissheim, Freisinger Str. 3, County Court Munich HRB 149743
>
> President: Diane Greene
>
>
>
>

-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
http://it.oetiker.ch tobi at oetiker.ch ++41 62 213 9902