[PATCH 07/70] cpufreq: interactive: adjust code and documentation to match

From: BÃlint Czobor
Date: Tue Oct 27 2015 - 13:31:51 EST


From: Todd Poynor <toddpoynor@xxxxxxxxxx>

Change-Id: If59c668d514a29febe5c35404fd9d01df8548eb1
Signed-off-by: Todd Poynor <toddpoynor@xxxxxxxxxx>
Signed-off-by: BÃlint Czobor <czoborbalint@xxxxxxxxx>
---
Documentation/cpu-freq/governors.txt | 16 +++++++++++++---
drivers/cpufreq/cpufreq_interactive.c | 6 +++---
2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/Documentation/cpu-freq/governors.txt b/Documentation/cpu-freq/governors.txt
index b262c53..40894da 100644
--- a/Documentation/cpu-freq/governors.txt
+++ b/Documentation/cpu-freq/governors.txt
@@ -249,11 +249,21 @@ frequency before ramping down. This is to ensure that the governor has
seen enough historic cpu load data to determine the appropriate
workload. Default is 80000 uS.

-go_maxspeed_load: The CPU load at which to ramp to max speed. Default
-is 85.
+hispeed_freq: An intermediate "hi speed" at which to initially ramp
+when CPU load hits the value specified in go_hispeed_load. If load
+stays high for the amount of time specified in above_hispeed_delay,
+then speed may be bumped higher. Default is maximum speed.
+
+go_hispeed_load: The CPU load at which to ramp to the intermediate "hi
+speed". Default is 85%.
+
+above_hispeed_delay: Once speed is set to hispeed_freq, wait for this
+long before bumping speed higher in response to continued high load.
+Default is 20000 uS.

timer_rate: Sample rate for reevaluating cpu load when the system is
-not idle. Default is 30000 uS.
+not idle. Default is 20000 uS.
+

3. The Governor Interface in the CPUfreq Core
=============================================
diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c
index 154f7bd..bf8d772 100644
--- a/drivers/cpufreq/cpufreq_interactive.c
+++ b/drivers/cpufreq/cpufreq_interactive.c
@@ -68,19 +68,19 @@ static struct mutex set_speed_lock;
static u64 hispeed_freq;

/* Go to hi speed when CPU load at or above this value. */
-#define DEFAULT_GO_HISPEED_LOAD 95
+#define DEFAULT_GO_HISPEED_LOAD 85
static unsigned long go_hispeed_load;

/*
* The minimum amount of time to spend at a frequency before we can ramp down.
*/
-#define DEFAULT_MIN_SAMPLE_TIME 20 * USEC_PER_MSEC
+#define DEFAULT_MIN_SAMPLE_TIME (80 * USEC_PER_MSEC)
static unsigned long min_sample_time;

/*
* The sample rate of the timer used to increase frequency
*/
-#define DEFAULT_TIMER_RATE 20 * USEC_PER_MSEC
+#define DEFAULT_TIMER_RATE (20 * USEC_PER_MSEC)
static unsigned long timer_rate;

/*
--
1.7.9.5

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