* Cpu steal
@ 2024-05-23 14:47 Y.G Kumar
2024-05-28 17:45 ` Sean Christopherson
0 siblings, 1 reply; 3+ messages in thread
From: Y.G Kumar @ 2024-05-23 14:47 UTC (permalink / raw)
To: kvm
Hi,
Is there a way of measuring cpu steal time of a guest from the
hypervisor ? Does it give accurate information ? What are some of the
effective ways to find out the steal time from outside the vm
Thanks
Kumar
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: Cpu steal
2024-05-23 14:47 Cpu steal Y.G Kumar
@ 2024-05-28 17:45 ` Sean Christopherson
0 siblings, 0 replies; 3+ messages in thread
From: Sean Christopherson @ 2024-05-28 17:45 UTC (permalink / raw)
To: Y.G Kumar; +Cc: kvm
On Thu, May 23, 2024, Y.G Kumar wrote:
> Hi,
>
> Is there a way of measuring cpu steal time of a guest from the
> hypervisor ? Does it give accurate information ? What are some of the
> effective ways to find out the steal time from outside the vm
Yes and no. KVM's PV steal time information isn't exposed anywhere, but only
because it's simply a reflection of the task's run_delay that's reported in
/proc/PID/schedstat (second column).
I assume there are tools that translate schedstat into human-readable information,
and/or do analysis on the info, but I don't have personal experience with any such
tools. If you need more help, I recommend pinging sched folks, as this is really
a scheduler question, not a KVM question.
^ permalink raw reply [flat|nested] 3+ messages in thread
* Cpu steal
@ 2023-11-23 11:02 Y.G Kumar
0 siblings, 0 replies; 3+ messages in thread
From: Y.G Kumar @ 2023-11-23 11:02 UTC (permalink / raw)
To: kvm
Hi All,
This is just a one-off query. Is there a way in kvm hypervisor as of
now, to find the cpu steal time of a virtual machine from outside it
as opposed to from within the vm ? Please give me your opinions ..
Thanks
Kumar
^ permalink raw reply [flat|nested] 3+ messages in thread
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