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cpufreq: interactive: Separate speed target revalidate time and initial set time

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Allow speed drop after min_sample_time elapses from last time
the current speed was last re-validated as appropriate for
current load / input boost.

Allow speed bump after min_sample_time (or above_hispeed_delay)
elapses from the time the current speed was originally set.

Change-Id: Ic25687a7a53d25e6544c30c47d7ab6f27a47bee8
Signed-off-by: Todd Poynor <toddpoynor@google.com>
This commit is contained in:
Todd Poynor 2012-04-20 13:18:32 -07:00 • committed by John Stultz
parent 759fcdd8d7
commit 1c31ed48a2
1 changed files with 12 additions and 4 deletions
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16
drivers/cpufreq/cpufreq_interactive.c
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@ -46,6 +46,8 @@ struct cpufreq_interactive_cpuinfo {
int idling;
u64 target_set_time;
u64 target_set_time_in_idle;
u64 target_validate_time;
u64 target_validate_time_in_idle;
struct cpufreq_policy *policy;
struct cpufreq_frequency_table *freq_table;
unsigned int target_freq;
@ -208,10 +210,10 @@ static void cpufreq_interactive_timer(unsigned long data)
/*
* Do not scale down unless we have been at this frequency for the
* minimum sample time.
* minimum sample time since last validated.
*/
if (new_freq < pcpu->target_freq) {
if (pcpu->timer_run_time - pcpu->target_set_time
if (pcpu->timer_run_time - pcpu->target_validate_time
< min_sample_time) {
trace_cpufreq_interactive_notyet(data, cpu_load,
pcpu->target_freq, new_freq);
@ -219,8 +221,8 @@ static void cpufreq_interactive_timer(unsigned long data)
}
}
pcpu->target_set_time_in_idle = now_idle;
pcpu->target_set_time = pcpu->timer_run_time;
pcpu->target_validate_time_in_idle = now_idle;
pcpu->target_validate_time = pcpu->timer_run_time;
if (pcpu->target_freq == new_freq) {
trace_cpufreq_interactive_already(data, cpu_load,
@ -230,6 +232,8 @@ static void cpufreq_interactive_timer(unsigned long data)
trace_cpufreq_interactive_target(data, cpu_load, pcpu->target_freq,
new_freq);
pcpu->target_set_time_in_idle = now_idle;
pcpu->target_set_time = pcpu->timer_run_time;
if (new_freq < pcpu->target_freq) {
pcpu->target_freq = new_freq;
@ -614,6 +618,10 @@ static int cpufreq_governor_interactive(struct cpufreq_policy *policy,
pcpu->target_set_time_in_idle =
get_cpu_idle_time_us(j,
&pcpu->target_set_time);
pcpu->target_validate_time =
pcpu->target_set_time;
pcpu->target_validate_time_in_idle =
pcpu->target_set_time_in_idle;
pcpu->governor_enabled = 1;
smp_wmb();
}