From: Sheng Yang <sheng@linux.intel.com>
To: Avi Kivity <avi@redhat.com>
Cc: "Zhang, Yanmin" <yanmin_zhang@linux.intel.com>,
Ingo Molnar <mingo@elte.hu>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org,
Marcelo Tosatti <mtosatti@redhat.com>,
oerg Roedel <joro@8bytes.org>,
Jes Sorensen <Jes.Sorensen@redhat.com>,
Gleb Natapov <gleb@redhat.com>,
Zachary Amsden <zamsden@redhat.com>,
zhiteng.huang@intel.com, tim.c.chen@intel.com,
Arnaldo Carvalho de Melo <acme@infradead.org>
Subject: Re: [PATCH V3] perf & kvm: Enhance perf to collect KVM guest os statistics from host side
Date: Wed, 14 Apr 2010 18:36:07 +0800 [thread overview]
Message-ID: <201004141836.07477.sheng@linux.intel.com> (raw)
In-Reply-To: <4BC59A01.3070802@redhat.com>
On Wednesday 14 April 2010 18:33:37 Avi Kivity wrote:
> On 04/14/2010 01:27 PM, Sheng Yang wrote:
> >> Yes, interesting to see what the latency is. If it's reasonably short
> >> (and I expect it will be so), we can do the busy wait solution.
> >>
> >> If we have an NMI counter somewhere, we can simply wait until it
> >> changes.
> >
> > Good idea. Of course we have one(at least on x86). There is
> > irq_stat.irq__nmi_count for per cpu. :)
>
> Okay, but kvm doesn't want to know about it. How about a new arch
> function, invoke_nmi_sync(), that will trigger the NMI and wait for it?
>
Sound reasonable. Would try it.
--
regards
Yang, Sheng
next prev parent reply other threads:[~2010-04-14 10:36 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-14 9:06 [PATCH V3] perf & kvm: Enhance perf to collect KVM guest os statistics from host side Zhang, Yanmin
2030-04-14 9:05 ` Zhang, Yanmin
2010-04-14 9:20 ` Avi Kivity
2010-04-14 9:43 ` Sheng Yang
2010-04-14 9:57 ` Avi Kivity
2010-04-14 10:14 ` Sheng Yang
2010-04-14 10:19 ` Avi Kivity
2010-04-14 10:27 ` Sheng Yang
2010-04-14 10:33 ` Avi Kivity
2010-04-14 10:36 ` Sheng Yang [this message]
2010-04-14 10:43 ` Ingo Molnar
2010-04-14 11:17 ` Avi Kivity
2010-04-15 1:05 ` Zhang, Yanmin
2030-04-15 1:04 ` Zhang, Yanmin
2010-04-15 8:05 ` Avi Kivity
2010-04-15 8:58 ` Zhang, Yanmin
2030-04-15 8:57 ` Zhang, Yanmin
2010-04-15 9:04 ` oerg Roedel
2010-04-15 9:09 ` Avi Kivity
2010-04-15 9:44 ` oerg Roedel
2010-04-15 9:48 ` Avi Kivity
2010-04-15 10:40 ` Joerg Roedel
2010-04-15 10:44 ` Avi Kivity
2010-04-15 14:08 ` Sheng Yang
2010-04-15 14:08 ` Sheng Yang
2010-04-17 18:12 ` Avi Kivity
2010-04-19 8:25 ` Avi Kivity
2010-04-20 3:32 ` Sheng Yang
2010-04-20 9:38 ` Avi Kivity
2010-04-27 19:03 ` [PATCH] Psychovisually-optimized HZ setting (2.6.33.3) Uwaysi Bin Kareem
2010-04-27 19:51 ` Randy Dunlap
2010-04-27 21:50 ` Valdis.Kletnieks
2010-04-15 8:58 ` [PATCH V3] perf & kvm: Enhance perf to collect KVM guest os statistics from host side Zhang, Yanmin
2010-04-15 1:05 ` Zhang, Yanmin
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