diff options
| author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-04-11 00:20:41 +0200 |
|---|---|---|
| committer | Joel Fernandes <joelaf@google.com> | 2017-09-06 20:36:47 +0000 |
| commit | 3482bbea6b3e9ed685ce42a77927dfeaec0be122 (patch) | |
| tree | eda8c6b0ba0863bc8bcd049c0a0fe3738522c1fd /include/linux | |
| parent | b13d0fb3390670995a7fc90f96c17542e305ca59 (diff) | |
BACKPORT: cpufreq: schedutil: Use policy-dependent transition delays
Make the schedutil governor take the initial (default) value of the
rate_limit_us sysfs attribute from the (new) transition_delay_us
policy parameter (to be set by the scaling driver).
That will allow scaling drivers to make schedutil use smaller default
values of rate_limit_us and reduce the default average time interval
between consecutive frequency changes.
Make intel_pstate set transition_delay_us to 500.
BACKPORT: Modified to support the separate up_rate_limit_us and
down_rate_limit_us (upstream just has a single rate_limit_us). Also
dropped the changes for intel_pstate as there's a merge conflict.
Change-Id: I62a8543879a4d8582cdcb31ebd55607705d1c8b1
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
(cherry picked from commit 1b72e7fd304639f1cd49d1e11955c4974936d88c)
Signed-off-by: Brendan Jackman <brendan.jackman@arm.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/cpufreq.h | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index b144e7445477..490d577aa144 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -119,7 +119,15 @@ struct cpufreq_policy { bool fast_switch_possible; bool fast_switch_enabled; - /* Cached frequency lookup from cpufreq_driver_resolve_freq. */ + /* + * Preferred average time interval between consecutive invocations of + * the driver to set the frequency for this policy. To be set by the + * scaling driver (0, which is the default, means no preference). + */ + unsigned int up_transition_delay_us; + unsigned int down_transition_delay_us; + + /* Cached frequency lookup from cpufreq_driver_resolve_freq. */ unsigned int cached_target_freq; int cached_resolved_idx; |