From: Gleb Natapov <gleb@redhat.com>
To: Avi Kivity <avi@redhat.com>
Cc: shashank rachamalla <shashank.rachamalla@gmail.com>, kvm@vger.kernel.org
Subject: Re: Questing regarding KVM Guest PMU
Date: Thu, 5 Apr 2012 17:41:51 +0300 [thread overview]
Message-ID: <20120405144151.GN11204@redhat.com> (raw)
In-Reply-To: <4F7DAE70.4070508@redhat.com>
On Thu, Apr 05, 2012 at 05:38:40PM +0300, Avi Kivity wrote:
> On 04/05/2012 04:57 PM, Gleb Natapov wrote:
> > > >
> > > May be it used NMI based profiling. We should ask oprofile developers.
> > > As I said I am almost sure my inability to run it on a host is probably
> > > PEBKAC, although I ran the same script exactly on the host and the
> > > guest (the script is from the first email of this thread)
> > >
> > After upgrading the kernel to latest git from whatever it was there the
> > same script works and counts CPU_CLK_UNHALT events.
> >
>
> This is even while it violates the Intel guidelines?
>
Yes, but who says the result is correct :) It seems that we handle
global ctrl msr wrong. That is counter can be enabled either in global
ctrl or in eventsel. Trying to confirm that.
--
Gleb.
next prev parent reply other threads:[~2012-04-05 14:41 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-18 10:18 Questing regarding KVM Guest PMU shashank rachamalla
2012-03-18 10:30 ` Gleb Natapov
2012-03-18 12:57 ` shashank rachamalla
2012-03-18 14:50 ` Avi Kivity
2012-03-18 14:50 ` Gleb Natapov
2012-03-18 16:17 ` shashank rachamalla
2012-03-18 16:51 ` Gleb Natapov
2012-03-19 6:50 ` shashank rachamalla
2012-03-19 7:07 ` Gleb Natapov
2012-04-03 13:50 ` shashank rachamalla
2012-04-03 16:58 ` Gleb Natapov
2012-04-03 18:43 ` shashank rachamalla
2012-04-03 18:54 ` shashank rachamalla
2012-04-04 7:04 ` Gleb Natapov
2012-04-04 10:19 ` shashank rachamalla
2012-04-04 10:29 ` Gleb Natapov
2012-04-05 2:37 ` shashank rachamalla
2012-04-05 12:27 ` Avi Kivity
2012-04-05 12:37 ` Gleb Natapov
2012-04-05 12:48 ` Avi Kivity
2012-04-05 13:26 ` Gleb Natapov
2012-04-05 13:28 ` Avi Kivity
2012-04-05 13:48 ` Gleb Natapov
2012-04-05 13:57 ` Gleb Natapov
2012-04-05 14:38 ` Avi Kivity
2012-04-05 14:41 ` Gleb Natapov [this message]
2012-04-06 5:13 ` shashank rachamalla
2012-04-06 6:50 ` Gleb Natapov
2012-04-08 15:27 ` Gleb Natapov
2012-04-09 9:26 ` Gleb Natapov
2012-04-10 3:18 ` shashank rachamalla
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