From: Thomas Gleixner <tglx@linutronix.de>
To: "Raslan, KarimAllah" <karahmed@amazon.de>
Cc: "boris.ostrovsky@oracle.com" <boris.ostrovsky@oracle.com>,
"joao.m.martins@oracle.com" <joao.m.martins@oracle.com>,
"konrad.wilk@oracle.com" <konrad.wilk@oracle.com>,
"ankur.a.arora@oracle.com" <ankur.a.arora@oracle.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"peterz@infradead.org" <peterz@infradead.org>,
"rkrcmar@redhat.com" <rkrcmar@redhat.com>,
"pbonzini@redhat.com" <pbonzini@redhat.com>,
"kernellwp@gmail.com" <kernellwp@gmail.com>,
"mtosatti@redhat.com" <mtosatti@redhat.com>
Subject: Re: cputime takes cstate into consideration
Date: Wed, 26 Jun 2019 21:23:10 +0200 (CEST) [thread overview]
Message-ID: <alpine.DEB.2.21.1906262119430.32342@nanos.tec.linutronix.de> (raw)
In-Reply-To: <1561575536.25880.10.camel@amazon.de>
[-- Attachment #1: Type: text/plain, Size: 671 bytes --]
On Wed, 26 Jun 2019, Raslan, KarimAllah wrote:
> On Wed, 2019-06-26 at 10:54 -0400, Konrad Rzeszutek Wilk wrote:
> > There were some ideas that Ankur (CC-ed) mentioned to me of using the perf
> > counters (in the host) to sample the guest and construct a better
> > accounting idea of what the guest does. That way the dashboard
> > from the host would not show 100% CPU utilization.
>
> You can either use the UNHALTED cycles perf-counter or you can use MPERF/APERF
> MSRs for that. (sorry I got distracted and forgot to send the patch)
Sure, but then you conflict with the other people who fight tooth and nail
over every single performance counter.
Thanks,
tglx
next prev parent reply other threads:[~2019-06-26 19:23 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-26 9:43 cputime takes cstate into consideration Wanpeng Li
2019-06-26 10:13 ` Peter Zijlstra
2019-06-26 10:33 ` Thomas Gleixner
2019-06-26 14:54 ` Konrad Rzeszutek Wilk
2019-06-26 16:16 ` Peter Zijlstra
2019-06-26 18:30 ` Konrad Rzeszutek Wilk
2019-06-26 18:41 ` Thomas Gleixner
2019-06-26 18:55 ` Raslan, KarimAllah
2019-06-26 19:19 ` Thomas Gleixner
2019-06-26 19:21 ` Peter Zijlstra
2019-06-26 19:27 ` Raslan, KarimAllah
2019-06-26 19:32 ` Thomas Gleixner
2019-06-26 20:01 ` Peter Zijlstra
2019-06-26 20:09 ` Thomas Gleixner
2019-12-10 0:44 ` Wanpeng Li
2019-06-26 19:29 ` Thomas Gleixner
2019-06-26 18:58 ` Raslan, KarimAllah
2019-06-26 19:23 ` Thomas Gleixner [this message]
2019-07-09 2:00 ` Ankur Arora
2019-07-09 2:06 ` Wanpeng Li
2019-07-09 12:38 ` Peter Zijlstra
2019-07-09 18:27 ` Ankur Arora
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