On Wed, Oct 14, 2015 at 04:20:57AM -0600, Jan Beulich wrote:
> >>> On 14.10.15 at 12:00, wrote:
> > Sounds reasonable. A better patch 2 may look like
> >
> > - *gtsc_khz = cpu_khz;
> > + if ( is_hvm_domain(d) && cpu_has_tsc_ratio )
> > + *gtsc_khz = d->arch.tsc_khz;
> > + else
> > + *gtsc
>>> On 14.10.15 at 12:00, wrote:
> Sounds reasonable. A better patch 2 may look like
>
> - *gtsc_khz = cpu_khz;
> + if ( is_hvm_domain(d) && cpu_has_tsc_ratio )
> + *gtsc_khz = d->arch.tsc_khz;
> + else
> + *gtsc_khz = cpu_khz;
>
> which gets d->arch.tsc_khz only if TSC ratio is used, ot
On Wed, Oct 14, 2015 at 03:40:01AM -0600, Jan Beulich wrote:
> >>> On 14.10.15 at 04:45, wrote:
> > However, patch 2 is still necessary. The existing tsc_get_info() uses
> > the host TSC frequency as the guest TSC frequency for a domain in
> > TSC_MODE_DEFAULT, which could cause errors in the foll
>>> On 14.10.15 at 04:45, wrote:
> However, patch 2 is still necessary. The existing tsc_get_info() uses
> the host TSC frequency as the guest TSC frequency for a domain in
> TSC_MODE_DEFAULT, which could cause errors in the following example:
> - A domain d using TSC_MODE_DEFAULT is created on h
On Fri, Oct 09, 2015 at 12:51:32AM -0600, Jan Beulich wrote:
> >>> On 28.09.15 at 09:13, wrote:
> > When the TSC mode of a domain is TSC_MODE_DEFAULT and no TSC emulation
> > is used, the existing tsc_get_info() calculates elapsed_nsec by scaling
> > the host TSC with a ratio between guest TSC rat
On 10/09/2015 12:51 PM, Haozhong Zhang wrote:
On Fri, Oct 09, 2015 at 12:31:53PM -0400, Boris Ostrovsky wrote:
On 10/09/2015 12:19 PM, Jan Beulich wrote:
On 09.10.15 at 18:09, wrote:
On 10/09/2015 11:11 AM, Jan Beulich wrote:
On 09.10.15 at 16:00, wrote:
On Fri, Oct 09, 2015 at 09:41:36AM
On Fri, Oct 09, 2015 at 12:31:53PM -0400, Boris Ostrovsky wrote:
> On 10/09/2015 12:19 PM, Jan Beulich wrote:
> On 09.10.15 at 18:09, wrote:
> >>On 10/09/2015 11:11 AM, Jan Beulich wrote:
> >>On 09.10.15 at 16:00, wrote:
> On Fri, Oct 09, 2015 at 09:41:36AM -0400, Boris Ostrovsky wrot
On 10/09/2015 12:39 PM, Haozhong Zhang wrote:
On Fri, Oct 09, 2015 at 11:37:06AM -0400, Boris Ostrovsky wrote:
On 10/09/2015 10:39 AM, Jan Beulich wrote:
On 09.10.15 at 15:41, wrote:
On 10/09/2015 02:51 AM, Jan Beulich wrote:
On 28.09.15 at 09:13, wrote:
When the TSC mode of a domain is TS
On Fri, Oct 09, 2015 at 11:37:06AM -0400, Boris Ostrovsky wrote:
> On 10/09/2015 10:39 AM, Jan Beulich wrote:
> On 09.10.15 at 15:41, wrote:
> >>On 10/09/2015 02:51 AM, Jan Beulich wrote:
> >>On 28.09.15 at 09:13, wrote:
> When the TSC mode of a domain is TSC_MODE_DEFAULT and no TSC e
On 10/09/2015 12:19 PM, Jan Beulich wrote:
On 09.10.15 at 18:09, wrote:
On 10/09/2015 11:11 AM, Jan Beulich wrote:
On 09.10.15 at 16:00, wrote:
On Fri, Oct 09, 2015 at 09:41:36AM -0400, Boris Ostrovsky wrote:
On 10/09/2015 02:51 AM, Jan Beulich wrote:
On 28.09.15 at 09:13, wrote:
When th
>>> On 09.10.15 at 18:09, wrote:
> On 10/09/2015 11:11 AM, Jan Beulich wrote:
> On 09.10.15 at 16:00, wrote:
>>> On Fri, Oct 09, 2015 at 09:41:36AM -0400, Boris Ostrovsky wrote:
On 10/09/2015 02:51 AM, Jan Beulich wrote:
On 28.09.15 at 09:13, wrote:
>> When the TSC mode of
On 10/09/2015 11:11 AM, Jan Beulich wrote:
On 09.10.15 at 16:00, wrote:
On Fri, Oct 09, 2015 at 09:41:36AM -0400, Boris Ostrovsky wrote:
On 10/09/2015 02:51 AM, Jan Beulich wrote:
On 28.09.15 at 09:13, wrote:
When the TSC mode of a domain is TSC_MODE_DEFAULT and no TSC emulation
is used, th
On 10/09/2015 10:43 AM, Jan Beulich wrote:
On 09.10.15 at 16:35, wrote:
On Fri, Oct 09, 2015 at 12:51:32AM -0600, Jan Beulich wrote:
On 28.09.15 at 09:13, wrote:
When the TSC mode of a domain is TSC_MODE_DEFAULT and no TSC emulation
is used, the existing tsc_get_info() calculates elapsed_nse
On 10/09/2015 10:39 AM, Jan Beulich wrote:
On 09.10.15 at 15:41, wrote:
On 10/09/2015 02:51 AM, Jan Beulich wrote:
On 28.09.15 at 09:13, wrote:
When the TSC mode of a domain is TSC_MODE_DEFAULT and no TSC emulation
is used, the existing tsc_get_info() calculates elapsed_nsec by scaling
the h
>>> On 09.10.15 at 16:00, wrote:
> On Fri, Oct 09, 2015 at 09:41:36AM -0400, Boris Ostrovsky wrote:
>> On 10/09/2015 02:51 AM, Jan Beulich wrote:
>> On 28.09.15 at 09:13, wrote:
>> >>When the TSC mode of a domain is TSC_MODE_DEFAULT and no TSC emulation
>> >>is used, the existing tsc_get_info
>>> On 09.10.15 at 16:35, wrote:
> On Fri, Oct 09, 2015 at 12:51:32AM -0600, Jan Beulich wrote:
>> >>> On 28.09.15 at 09:13, wrote:
>> > When the TSC mode of a domain is TSC_MODE_DEFAULT and no TSC emulation
>> > is used, the existing tsc_get_info() calculates elapsed_nsec by scaling
>> > the hos
>>> On 09.10.15 at 15:41, wrote:
> On 10/09/2015 02:51 AM, Jan Beulich wrote:
> On 28.09.15 at 09:13, wrote:
>>> When the TSC mode of a domain is TSC_MODE_DEFAULT and no TSC emulation
>>> is used, the existing tsc_get_info() calculates elapsed_nsec by scaling
>>> the host TSC with a ratio bet
On Fri, Oct 09, 2015 at 12:51:32AM -0600, Jan Beulich wrote:
> >>> On 28.09.15 at 09:13, wrote:
> > When the TSC mode of a domain is TSC_MODE_DEFAULT and no TSC emulation
> > is used, the existing tsc_get_info() calculates elapsed_nsec by scaling
> > the host TSC with a ratio between guest TSC rat
On Fri, Oct 09, 2015 at 09:41:36AM -0400, Boris Ostrovsky wrote:
> On 10/09/2015 02:51 AM, Jan Beulich wrote:
> On 28.09.15 at 09:13, wrote:
> >>When the TSC mode of a domain is TSC_MODE_DEFAULT and no TSC emulation
> >>is used, the existing tsc_get_info() calculates elapsed_nsec by scaling
>
On 10/09/2015 02:51 AM, Jan Beulich wrote:
On 28.09.15 at 09:13, wrote:
When the TSC mode of a domain is TSC_MODE_DEFAULT and no TSC emulation
is used, the existing tsc_get_info() calculates elapsed_nsec by scaling
the host TSC with a ratio between guest TSC rate and
nanoseconds. However, the r
>>> On 28.09.15 at 09:13, wrote:
> When the TSC mode of a domain is TSC_MODE_DEFAULT and no TSC emulation
> is used, the existing tsc_get_info() calculates elapsed_nsec by scaling
> the host TSC with a ratio between guest TSC rate and
> nanoseconds. However, the result will be incorrect if the gue
When the TSC mode of a domain is TSC_MODE_DEFAULT and no TSC emulation
is used, the existing tsc_get_info() calculates elapsed_nsec by scaling
the host TSC with a ratio between guest TSC rate and
nanoseconds. However, the result will be incorrect if the guest TSC rate
differs from the host TSC rate
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