libvirt users - Dec 2022 - Libvirt

Hi All,

I am trying to collect memory, disk and network stats for a VM on kvm host.
It seems that the statistics are not matching what the OS inside the VM is
reporting. Why is this discrepancy ?

Is this a known bug of libvirt ? Also I heard that libvirt shows cumulative
figures for these measures ever since the VM was created.  Also I tested by
creating a new vm and comparing the stats without a reboot . Even in this
case, the stats dont agree.  Can someone help me here please ?


Thanks
Kumar
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Hi,

I think best way is to use BPF to collect stats. I did this in past in
combination with 'perf'.
Theres a nice book of Brandon Greg from Netflix Networks where he describe how
to do this and how to write own scripts.

merry Xmas

marko

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26.12.2022 11:34:20 Gk Gk <ygk.kmr at gmail.com>:
> Hi All,
> 
> I am trying to collect memory, disk and network stats for a VM on kvm host.
It seems that the statistics are not matching what the OS inside the VM is
reporting. Why is this discrepancy ?
> 
> Is this a known bug of libvirt ? Also I heard that libvirt shows cumulative
figures for these measures ever since the VM was created.? Also I tested by
creating a new vm and comparing the stats without a reboot . Even in this case,
the stats dont agree.? Can someone help me here please ?
> 
> 
> Thanks
> Kumar
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