Libvirt

[Marko Horn]

Hello,

yes I can :-)

https://www.brendangregg.com/

on the page you will find a link to his 'Linux Performance' book.
On the page are also further Infos about the topic 'performance'.
you will have to dive into the stuff.
(e)BPF is a "MIGHTY" area.
But you can pull out nearly 'every' meta data from the kernel.

Also for your interest:

https://www.brendangregg.com/Slides/SREcon2022_ComputingPerformance/

Computing Performance 2022 and what is on the horizon!

have fun!

Slainte

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26.12.2022 18:09:39 Gk Gk <ygk.kmr at gmail.com>:

> Thanks Marco for the response. Is it possible to collect these vm stats from the host KVM hypervisor ? Also can u give the link for this book ?
> 
> Thanks
> Happy holidays
> 
> On Monday, December 26, 2022, Marko Horn <weber at zbfmail.de> wrote:
>> 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
>>
>> ________________________________
>>
>> 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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