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SubjectRe: [PATCH 0/2] cpufreq: ondemand: Eliminate the deadband effect
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On Monday, June 30, 2014 07:59:32 PM Stratos Karafotis wrote:
> Hi all,
>
> This patchset changes slightly the calculation of target frequency to
> eliminate the deadband effect (explained in patch 2 changelog) that it
> seems to slow down the CPU in low and medium loads.
>
> Patch 1 introduces a new relation (RELATION_C) for the next frequency
> selection, which chooses the closest frequency to target.
>
> Patch 2 is the actual change to ondemand governor.
>
> You may find graphs with the 'deadband' effect and benchmark results:
> https://docs.google.com/spreadsheets/d/16kDBh5lyc6YvBnoS1hUa1t2O38z0xrWvaEj5XtJ8auw/edit#gid=2072493052
>
> Thanks
>
>
> Stratos Karafotis (2):
> cpufreq: Introduce new relation for freq selection
> cpufreq: ondemand: Eliminate the deadband effect in low loads
>
> drivers/cpufreq/cpufreq_ondemand.c | 11 +++++++----
> drivers/cpufreq/freq_table.c | 12 +++++++++++-
> include/linux/cpufreq.h | 1 +
> 3 files changed, 19 insertions(+), 5 deletions(-)

OK, I've queued up these two patches for 3.17. We'll see if anyone sees
any problems related to them. Thanks!

--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.


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