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intel_pstate: expose turbo range to sysfs

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This patch adds "turbo_pct" to the intel_pstate sysfs interface.
turbo_pct will display the percentage of the total supported
pstates that are in the turbo range.  This value is independent
of whether turbo has been disabled or not.

Signed-off-by: Kristen Carlson Accardi <[email protected]>
Signed-off-by: Rafael J. Wysocki <[email protected]>
This commit is contained in:
Kristen Carlson Accardi 2015-01-28 15:03:27 -08:00 • committed by Rafael J. Wysocki
commit d01b1f48c5
2 changed files with 22 additions and 0 deletions
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4
Documentation/cpu-freq/intel-pstate.txt
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@ -37,6 +37,10 @@ controlling P state selection. These files have been added to
no_turbo: limits the driver to selecting P states below the turbo
frequency range.
turbo_pct: displays the percentage of the total performance that
is supported by hardware that is in the turbo range. This number
is independent of whether turbo has been disabled or not.
For contemporary Intel processors, the frequency is controlled by the
processor itself and the P-states exposed to software are related to
performance levels. The idea that frequency can be set to a single