diff options
| author | Todd Poynor <toddpoynor@google.com> | 2012-04-17 17:39:34 -0700 |
|---|---|---|
| committer | Arve Hjønnevåg <arve@android.com> | 2013-07-01 13:40:43 -0700 |
| commit | cdd48fc92e988c0d09aa0228a88fd00500dc0e00 (patch) | |
| tree | 0031ff6ee09fe7c7d25ebb5d690bdf85b3bffd79 | |
| parent | a48c5d30b7ffdc6c4a21493c94625a0096e45f45 (diff) | |
cpufreq: interactive: adjust code and documentation to match
Change-Id: If59c668d514a29febe5c35404fd9d01df8548eb1
Signed-off-by: Todd Poynor <toddpoynor@google.com>
| -rw-r--r-- | Documentation/cpu-freq/governors.txt | 16 | ||||
| -rw-r--r-- | 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 14da80d09370..1f591de15b56 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 154f7bd330b2..bf8d7727311f 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; /* |