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From: Sean Christopherson <seanjc@google.com>
To: "Y.G Kumar" <ygkumar17@gmail.com>
Cc: kvm@vger.kernel.org
Subject: Re: Cpu steal
Date: Tue, 28 May 2024 10:45:17 -0700	[thread overview]
Message-ID: <ZlYYLRW_3Hv36So3@google.com> (raw)
In-Reply-To: <CAD4ZjH0oAfUDfbipQk2YHXwV3zKdNyGwpCyybA=y8_6g3LON0g@mail.gmail.com>

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.

  reply	other threads:[~2024-05-28 17:45 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-05-23 14:47 Cpu steal Y.G Kumar
2024-05-28 17:45 ` Sean Christopherson [this message]
  -- strict thread matches above, loose matches on Subject: below --
2023-11-23 11:02 Y.G Kumar

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