Len Brown 32e9518005 intel_idle: export both C1 and C1E ...

Here we disable HW promotion of C1 to C1E
and export both C1 and C1E and distinct C-states.

This allows a cpuidle governor to choose a lower latency
C-state than C1E when necessary to satisfy performance
and QOS constraints -- and still save power versus polling.
This also corrects the erroneous latency previously reported
for C1E -- it is 10usec, not 1usec.

Note that if you use "intel_idle.max_cstate=N",
then you must increment N by 1 to get the same behavior
after this change.

Signed-off-by: Len Brown <len.brown@intel.com>

2013-02-13 18:22:08 -05:00

..

i7300_idle.c

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intel_idle.c

intel_idle: export both C1 and C1E

2013-02-13 18:22:08 -05:00

Kconfig

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Makefile

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