Re: [Xen-devel] [PATCH v5 8/9] x86/intel_pstate: support the use of intel_pstate in pmstat.c

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 26.10.15 at 11:45, <wei.w.wang@xxxxxxxxx> wrote:
> On 26/10/2015 18:37,  Jan Beulich wrote:
>> >>> On 26.10.15 at 11:19, <wei.w.wang@xxxxxxxxx> wrote:
>> > On 26/10/2015 17:54,  Jan Beulich wrote:
>> >> That wasn't the question; I rather inquired what "meaning at the same 
>> >> time"
>> >> both fields have.
>> >
>> > turbo_enable: indicates if turbo is enabled or not.
>> > turbo_pct: shows the capability of turbo in percentage. For example if
>> > the CPU has the following operating frequency range:
>> > From [Min] to [Max]: 1.2GH, 1.3GHZ,1.4GHZ,...,2.3GHZ, so 1.2--->2.3,
>> > length = 12 Turbo frequency: 3.7GHZ, so 1.2---->3.7, length = 26 Then
>> > turbo_pct = (26 - 12) / 26 = 54%, that is turbo_pct = 54.
>> 
>> So what meaning does e.g. "turbo_enabled = 1" plus "turbo_pct = 0"
>> have? Or "turbo_enabled = 0" plus "turbo_pct > 0"?
> 
> " turbo_pct = 54" is the property of the CPU, just like MAX=3.7GHZ. It 
> should be something engraved on stone, not changeable. So, I think it's not a 
> good idea to put them together.

That's a valid statement, but not really an answer to the question(s)
raised.

Jan


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel