diff options
| author | Mike Chan <mike@android.com> | 2009-02-10 17:24:37 -0800 |
|---|---|---|
| committer | Arve Hjønnevåg <arve@android.com> | 2009-04-07 16:42:59 -0700 |
| commit | 0d75cd22f9c28efffa0d8b8d3485c6466ef925d9 (patch) | |
| tree | 027001fe18ebc8f160185c4e080fbd3a609dca05 | |
| parent | 45e1cca7bc33827c9ffe5eabdf6f4b26cf6e8970 (diff) | |
cpufreq: Governor poll frequency tuneables exported in config.
Signed-off-by: Mike Chan <mike@android.com>
| -rw-r--r-- | drivers/cpufreq/Kconfig | 13 | ||||
| -rw-r--r-- | drivers/cpufreq/cpufreq_conservative.c | 5 | ||||
| -rw-r--r-- | drivers/cpufreq/cpufreq_ondemand.c | 5 |
3 files changed, 17 insertions, 6 deletions
diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig index a8c8d9c19d74..335f28b9fa28 100644 --- a/drivers/cpufreq/Kconfig +++ b/drivers/cpufreq/Kconfig @@ -190,4 +190,17 @@ config CPU_FREQ_GOV_CONSERVATIVE If in doubt, say N. +config CPU_FREQ_MIN_TICKS + int "Ticks between governor polling interval." + default 10 + help + Minimum number of ticks between polling interval for governors. + +config CPU_FREQ_SAMPLING_LATENCY_MULTIPLIER + int "Sampling rate multiplier for governors." + default 1000 + help + Sampling latency rate multiplied by the cpu switch latency. + Affects governor polling. + endif # CPU_FREQ diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c index 0320962c4ec5..cbfc99d5d18e 100644 --- a/drivers/cpufreq/cpufreq_conservative.c +++ b/drivers/cpufreq/cpufreq_conservative.c @@ -51,11 +51,10 @@ static unsigned int def_sampling_rate; #define MIN_SAMPLING_RATE_RATIO (2) /* for correct statistics, we need at least 10 ticks between each measure */ #define MIN_STAT_SAMPLING_RATE \ - (MIN_SAMPLING_RATE_RATIO * jiffies_to_usecs(10)) + (MIN_SAMPLING_RATE_RATIO * jiffies_to_usecs(CONFIG_CPU_FREQ_MIN_TICKS)) #define MIN_SAMPLING_RATE \ (def_sampling_rate / MIN_SAMPLING_RATE_RATIO) #define MAX_SAMPLING_RATE (500 * def_sampling_rate) -#define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER (1000) #define DEF_SAMPLING_DOWN_FACTOR (1) #define MAX_SAMPLING_DOWN_FACTOR (10) #define TRANSITION_LATENCY_LIMIT (10 * 1000 * 1000) @@ -524,7 +523,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy, latency = 1; def_sampling_rate = 10 * latency * - DEF_SAMPLING_RATE_LATENCY_MULTIPLIER; + CONFIG_CPU_FREQ_SAMPLING_LATENCY_MULTIPLIER; if (def_sampling_rate < MIN_STAT_SAMPLING_RATE) def_sampling_rate = MIN_STAT_SAMPLING_RATE; diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index 6f45b1658a67..6c80533b075e 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -48,11 +48,10 @@ static unsigned int def_sampling_rate; #define MIN_SAMPLING_RATE_RATIO (2) /* for correct statistics, we need at least 10 ticks between each measure */ #define MIN_STAT_SAMPLING_RATE \ - (MIN_SAMPLING_RATE_RATIO * jiffies_to_usecs(10)) + (MIN_SAMPLING_RATE_RATIO * jiffies_to_usecs(CONFIG_CPU_FREQ_MIN_TICKS)) #define MIN_SAMPLING_RATE \ (def_sampling_rate / MIN_SAMPLING_RATE_RATIO) #define MAX_SAMPLING_RATE (500 * def_sampling_rate) -#define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER (1000) #define TRANSITION_LATENCY_LIMIT (10 * 1000 * 1000) static void do_dbs_timer(struct work_struct *work); @@ -592,7 +591,7 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy, latency = 1; def_sampling_rate = latency * - DEF_SAMPLING_RATE_LATENCY_MULTIPLIER; + CONFIG_CPU_FREQ_SAMPLING_LATENCY_MULTIPLIER; if (def_sampling_rate < MIN_STAT_SAMPLING_RATE) def_sampling_rate = MIN_STAT_SAMPLING_RATE; |