From: Stratos Karafotis <stratosk@semaphore.gr>
To: rjw@rjwysocki.net, viresh.kumar@linaro.org
Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 0/2] cpufreq: ondemand: Eliminate the deadband effect
Date: Mon, 30 Jun 2014 19:59:32 +0300 [thread overview]
Message-ID: <1404147574-17422-1-git-send-email-stratosk@semaphore.gr> (raw)
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(-)
--
1.9.3
next reply other threads:[~2014-06-30 16:59 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-06-30 16:59 Stratos Karafotis [this message]
2014-06-30 16:59 ` [PATCH 1/2] cpufreq: Introduce new relation for freq selection Stratos Karafotis
2014-06-30 16:59 ` [PATCH 2/2] cpufreq: ondemand: Eliminate the deadband effect Stratos Karafotis
2014-07-11 16:57 ` Pavel Machek
2014-07-11 17:29 ` Stratos Karafotis
2014-07-11 18:34 ` Pavel Machek
2014-07-11 19:37 ` Stratos Karafotis
2014-07-20 21:51 ` Pavel Machek
2014-07-21 5:41 ` Stratos Karafotis
2014-07-12 15:45 ` [PATCH 0/2] " Doug Smythies
2014-07-13 16:54 ` Stratos Karafotis
2014-07-22 23:50 ` Rafael J. Wysocki
2014-07-23 9:01 ` Stratos Karafotis
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