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cpufreq: interactive: configurable delay before raising above hispeed

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Change-Id: I4d6ac40b23a3790d48e30c37408284e9f955e8fa
Signed-off-by: Todd Poynor <toddpoynor@google.com>
This commit is contained in:
Todd Poynor
2012-04-13 20:18:02 -07:00
committed by John Stultz
parent 27c22a708f
commit 4ca4034e0b
1 changed files with 41 additions and 0 deletions
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41
drivers/cpufreq/cpufreq_interactive.c
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@@ -83,6 +83,13 @@ static unsigned long min_sample_time;
#define DEFAULT_TIMER_RATE 20 * USEC_PER_MSEC
static unsigned long timer_rate;
/*
* Wait this long before raising speed above hispeed, by default a single
* timer interval.
*/
#define DEFAULT_ABOVE_HISPEED_DELAY DEFAULT_TIMER_RATE
static unsigned long above_hispeed_delay_val;
static int cpufreq_governor_interactive(struct cpufreq_policy *policy,
unsigned int event);
@@ -174,6 +181,16 @@ static void cpufreq_interactive_timer(unsigned long data)
if (new_freq < hispeed_freq)
new_freq = hispeed_freq;
if (pcpu->target_freq == hispeed_freq &&
new_freq > hispeed_freq &&
pcpu->timer_run_time - pcpu->target_set_time
< above_hispeed_delay_val) {
trace_cpufreq_interactive_notyet(data, cpu_load,
pcpu->target_freq,
new_freq);
goto rearm;
}
}
} else {
new_freq = pcpu->policy->max * cpu_load / 100;
@@ -515,6 +532,28 @@ static ssize_t store_min_sample_time(struct kobject *kobj,
static struct global_attr min_sample_time_attr = __ATTR(min_sample_time, 0644,
show_min_sample_time, store_min_sample_time);
static ssize_t show_above_hispeed_delay(struct kobject *kobj,
struct attribute *attr, char *buf)
{
return sprintf(buf, "%lu\n", above_hispeed_delay_val);
}
static ssize_t store_above_hispeed_delay(struct kobject *kobj,
struct attribute *attr,
const char *buf, size_t count)
{
int ret;
unsigned long val;
ret = strict_strtoul(buf, 0, &val);
if (ret < 0)
return ret;
above_hispeed_delay_val = val;
return count;
}
define_one_global_rw(above_hispeed_delay);
static ssize_t show_timer_rate(struct kobject *kobj,
struct attribute *attr, char *buf)
{
@@ -540,6 +579,7 @@ static struct global_attr timer_rate_attr = __ATTR(timer_rate, 0644,
static struct attribute *interactive_attributes[] = {
&hispeed_freq_attr.attr,
&go_hispeed_load_attr.attr,
&above_hispeed_delay.attr,
&min_sample_time_attr.attr,
&timer_rate_attr.attr,
NULL,
@@ -660,6 +700,7 @@ static int __init cpufreq_interactive_init(void)
go_hispeed_load = DEFAULT_GO_HISPEED_LOAD;
min_sample_time = DEFAULT_MIN_SAMPLE_TIME;
above_hispeed_delay_val = DEFAULT_ABOVE_HISPEED_DELAY;
timer_rate = DEFAULT_TIMER_RATE;
/* Initalize per-cpu timers */