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author | Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | 2005-08-25 15:59:00 -0400 |
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committer | Len Brown <len.brown@intel.com> | 2005-08-26 22:22:33 -0400 |
commit | d395bf12d1ba61437e546eb642f0d7ea666123ff (patch) | |
tree | fbae0f68f62f02803e17309a3d1180619d4fdd31 /include/acpi | |
parent | 60cfff3516580f5c782cef4dc28f2974c4df8ed1 (diff) |
[ACPI] Reduce acpi-cpufreq switching latency by 50%
The acpi-cpufreq driver does a P-state get after a P-state set
to verify whether set went through successfully. This test
is kind of redundant as set goes throught most of the times,
and the test is also expensive as a get of P-states can
take a lot of time (same as a set operation) as it goes
through SMM mode. Effectively, we are doubling the P-state
latency due to this get opertion.
momdule parameter "acpi_pstate_strict" restores orginal paranoia.
http://bugzilla.kernel.org/show_bug.cgi?id=5129
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include/acpi')
0 files changed, 0 insertions, 0 deletions