From: Sheng Yang <sheng@linux.intel.com>
To: Avi Kivity <avi@redhat.com>
Cc: kvm@vger.kernel.org, "Hao, Xudong" <xudong.hao@intel.com>
Subject: Re: KVM Test report, kernel e6a9246... qemu 94f964d...
Date: Wed, 8 Sep 2010 08:35:14 +0800 [thread overview]
Message-ID: <201009080835.14800.sheng@linux.intel.com> (raw)
In-Reply-To: <4C863CD1.7020501@redhat.com>
On Tuesday 07 September 2010 21:23:29 Avi Kivity wrote:
> On 09/07/2010 03:31 PM, Avi Kivity wrote:
> > On 09/07/2010 03:04 PM, Avi Kivity wrote:
> >> On 09/07/2010 02:27 PM, Avi Kivity wrote:
> >>> On 09/07/2010 11:54 AM, Sheng Yang wrote:
> >>>> BTW: the bad commit is: c94c3ba901f87115cf574044e7faabfb1d0251fb
> >>>> "KVM: Don't
> >>>> save/restore MSR_IA32_PERF_STATUS", but I haven't figured out the
> >>>> reason yet.
> >>>
> >>> Confirmed. Strange!
> >>
> >> It's incredibly slow. Did we disable the cpu cache somehow? Maybe
> >> through the page tables?
> >
> > PAT = 0.
Quite impressive!
> Patch posted - qemu didn't reset PAT correctly, but this worked before
> c94c3ba90 since setting MSR_IA32_PERF_STATUS failed (and qemu didn't
> check the error code).
Thanks!
--
regards
Yang, Sheng
prev parent reply other threads:[~2010-09-08 0:34 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-09-06 3:05 KVM Test report, kernel e6a9246... qemu 94f964d Hao, Xudong
2010-09-06 6:55 ` Avi Kivity
2010-09-06 6:59 ` Hao, Xudong
2010-09-06 8:04 ` Avi Kivity
2010-09-06 8:08 ` Hao, Xudong
2010-09-06 8:56 ` Avi Kivity
2010-09-07 0:51 ` Hao, Xudong
2010-09-07 7:22 ` Hao, Xudong
2010-09-07 8:15 ` Avi Kivity
2010-09-07 8:54 ` Sheng Yang
2010-09-07 11:27 ` Avi Kivity
2010-09-07 12:04 ` Avi Kivity
2010-09-07 12:31 ` Avi Kivity
2010-09-07 13:23 ` Avi Kivity
2010-09-08 0:35 ` Sheng Yang [this message]
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