Lately tsc page was implemented but filled with empty
values. This patch setup tsc page scale and offset based
on vcpu tsc, tsc_khz and HV_X64_MSR_TIME_REF_COUNT value.
The valid tsc page drops HV_X64_MSR_TIME_REF_COUNT msr
reads count to zero which potentially improves performance.
The patch ap
ping
On 12/24/2015 12:33 PM, Andrey Smetanin wrote:
Lately tsc page was implemented but filled with empty
values. This patch setup tsc page scale and offset based
on vcpu tsc, tsc_khz and HV_X64_MSR_TIME_REF_COUNT value.
The valid tsc page drops HV_X64_MSR_TIME_REF_COUNT msr
reads count to zero
On 12/24/2015 12:33 PM, Andrey Smetanin wrote:
Lately tsc page was implemented but filled with empty
values. This patch setup tsc page scale and offset based
on vcpu tsc, tsc_khz and HV_X64_MSR_TIME_REF_COUNT value.
The valid tsc page drops HV_X64_MSR_TIME_REF_COUNT msr
reads count to zero whic
On 19/01/2016 08:48, Denis V. Lunev wrote:
>>
>> diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
>> index 6877b4d7e..93c9e25 100644
>> --- a/include/linux/kvm_host.h
>> +++ b/include/linux/kvm_host.h
>> @@ -145,6 +145,7 @@ static inline bool is_error_page(struct page *page)
>>
On 01/20/2016 05:05 PM, Paolo Bonzini wrote:
On 19/01/2016 08:48, Denis V. Lunev wrote:
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 6877b4d7e..93c9e25 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -145,6 +145,7 @@ static inline bool is_error_
On 01/20/2016 05:52 PM, Roman Kagan wrote:
On Wed, Jan 20, 2016 at 05:44:49PM +0300, Denis V. Lunev wrote:
On 01/20/2016 05:05 PM, Paolo Bonzini wrote:
On 19/01/2016 08:48, Denis V. Lunev wrote:
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 6877b4d7e..93c9e25 100644
--
On 01/20/2016 05:05 PM, Paolo Bonzini wrote:
On 19/01/2016 08:48, Denis V. Lunev wrote:
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 6877b4d7e..93c9e25 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -145,6 +145,7 @@ static inline bool is_er
On Wed, Jan 20, 2016 at 05:44:49PM +0300, Denis V. Lunev wrote:
> On 01/20/2016 05:05 PM, Paolo Bonzini wrote:
> >
> >On 19/01/2016 08:48, Denis V. Lunev wrote:
> >>>diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
> >>>index 6877b4d7e..93c9e25 100644
> >>>--- a/include/linux/kvm_ho
On 20/01/2016 15:52, Roman Kagan wrote:
> I think Paolo wanted to be compatible not only with the de facto
> implementation in Windows Hyper-V guests, but also with the Linux driver
> which followed the buggy spec and thought 0x to be invalid.
0x is not invalid; it means it is va
On 24/12/2015 10:33, Andrey Smetanin wrote:
> Lately tsc page was implemented but filled with empty
> values. This patch setup tsc page scale and offset based
> on vcpu tsc, tsc_khz and HV_X64_MSR_TIME_REF_COUNT value.
>
> The valid tsc page drops HV_X64_MSR_TIME_REF_COUNT msr
> reads count to
On 01/22/2016 01:08 PM, Paolo Bonzini wrote:
On 24/12/2015 10:33, Andrey Smetanin wrote:
Lately tsc page was implemented but filled with empty
values. This patch setup tsc page scale and offset based
on vcpu tsc, tsc_khz and HV_X64_MSR_TIME_REF_COUNT value.
The valid tsc page drops HV_X64_
On 22/01/2016 11:15, Andrey Smetanin wrote:
>>
>> - unless KVM can use a master clock, it is incorrect to set up the TSC
>> page this way; the sequence needs to be 0x in that case
> 0x is not an invalid value for tsc page,
> see https://lkml.org/lkml/2015/11/2/655
oh, I see now.
On 01/22/2016 02:02 PM, Paolo Bonzini wrote:
On 22/01/2016 11:15, Andrey Smetanin wrote:
- unless KVM can use a master clock, it is incorrect to set up the TSC
page this way; the sequence needs to be 0x in that case
0x is not an invalid value for tsc page,
see https://lkml.
On 01/22/2016 02:02 PM, Paolo Bonzini wrote:
On 22/01/2016 11:15, Andrey Smetanin wrote:
- unless KVM can use a master clock, it is incorrect to set up the TSC
page this way; the sequence needs to be 0x in that case
0x is not an invalid value for tsc page,
see https://lkml.
On 22/01/2016 12:31, Andrey Smetanin wrote:
>>
>> Sometimes the TSC is detected to be unstable and Linux switches to
>> another clocksource. At least in that case you can get a write to the
>> TSC page while the guest is running.
> Sorry, now I got it, you mean host TSC is unstable and we should
On 01/22/2016 02:53 PM, Paolo Bonzini wrote:
On 22/01/2016 12:31, Andrey Smetanin wrote:
Sometimes the TSC is detected to be unstable and Linux switches to
another clocksource. At least in that case you can get a write to the
TSC page while the guest is running.
Sorry, now I got it, you m
On 01/22/2016 01:08 PM, Paolo Bonzini wrote:
On 24/12/2015 10:33, Andrey Smetanin wrote:
Lately tsc page was implemented but filled with empty
values. This patch setup tsc page scale and offset based
on vcpu tsc, tsc_khz and HV_X64_MSR_TIME_REF_COUNT value.
The valid tsc page drops HV_X64_
On 22/01/2016 14:13, Andrey Smetanin wrote:
>>
>
> We(@virtuozzo.com) will be very thankful to you for the patch which
> integrates Hyper-V tsc page with kvm clock. We even may do work by
> yourself, but our priority now is Hyper-V VMBus initialization
> (which is not in dependency on Hyper-V ts
On 01/22/2016 04:21 PM, Paolo Bonzini wrote:
On 22/01/2016 14:13, Andrey Smetanin wrote:
We(@virtuozzo.com) will be very thankful to you for the patch which
integrates Hyper-V tsc page with kvm clock. We even may do work by
yourself, but our priority now is Hyper-V VMBus initialization
(w
On Thu, Dec 24, 2015 at 1:33 AM, Andrey Smetanin
wrote:
> Lately tsc page was implemented but filled with empty
> values. This patch setup tsc page scale and offset based
> on vcpu tsc, tsc_khz and HV_X64_MSR_TIME_REF_COUNT value.
>
> The valid tsc page drops HV_X64_MSR_TIME_REF_COUNT msr
> reads
On 01/06/2016 12:48 AM, Peter Hornyack wrote:
On Thu, Dec 24, 2015 at 1:33 AM, Andrey Smetanin
wrote:
Lately tsc page was implemented but filled with empty
values. This patch setup tsc page scale and offset based
on vcpu tsc, tsc_khz and HV_X64_MSR_TIME_REF_COUNT value.
The valid tsc page d
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