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cpufreq: interactive: remove load since last speed change

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The longer-term load since last speed change isn't terribly useful,
may delay recognition of dropping load, and would need forthcoming
changes to adjust load for changing CPU speeds.  Drop it.

Change-Id: Ic3cbb0542cc3484617031787e03ed9bdd632dec1
Signed-off-by: Todd Poynor <toddpoynor@google.com>
This commit is contained in:
Todd Poynor
2012-12-07 20:08:45 -08:00
committed by John Stultz
parent fbc1d52f84
commit 482f37e3d8
1 changed files with 4 additions and 30 deletions
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34
drivers/cpufreq/cpufreq_interactive.c
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@@ -43,8 +43,6 @@ struct cpufreq_interactive_cpuinfo {
int timer_idlecancel;
u64 time_in_idle;
u64 time_in_idle_timestamp;
u64 target_set_time;
u64 target_set_time_in_idle;
struct cpufreq_policy *policy;
struct cpufreq_frequency_table *freq_table;
unsigned int target_freq;
@@ -238,7 +236,6 @@ static void cpufreq_interactive_timer(unsigned long data)
unsigned int delta_idle;
unsigned int delta_time;
int cpu_load;
int load_since_change;
struct cpufreq_interactive_cpuinfo *pcpu =
&per_cpu(cpuinfo, data);
u64 now_idle;
@@ -266,23 +263,6 @@ static void cpufreq_interactive_timer(unsigned long data)
else
cpu_load = 100 * (delta_time - delta_idle) / delta_time;
delta_idle = (unsigned int)(now_idle - pcpu->target_set_time_in_idle);
delta_time = (unsigned int)(now - pcpu->target_set_time);
if ((delta_time == 0) || (delta_idle > delta_time))
load_since_change = 0;
else
load_since_change =
100 * (delta_time - delta_idle) / delta_time;
/*
* Choose greater of short-term load (since last idle timer
* started or timer function re-armed itself) or long-term load
* (since last frequency change).
*/
if (load_since_change > cpu_load)
cpu_load = load_since_change;
if ((cpu_load >= go_hispeed_load || boost_val) &&
pcpu->target_freq < hispeed_freq)
new_freq = hispeed_freq;
@@ -335,8 +315,6 @@ static void cpufreq_interactive_timer(unsigned long data)
trace_cpufreq_interactive_target(data, cpu_load, pcpu->target_freq,
pcpu->policy->cur, new_freq);
pcpu->target_set_time_in_idle = now_idle;
pcpu->target_set_time = now;
pcpu->target_freq = new_freq;
spin_lock_irqsave(&speedchange_cpumask_lock, flags);
@@ -500,9 +478,8 @@ static void cpufreq_interactive_boost(void)
if (pcpu->target_freq < hispeed_freq) {
pcpu->target_freq = hispeed_freq;
cpumask_set_cpu(i, &speedchange_cpumask);
pcpu->target_set_time_in_idle =
get_cpu_idle_time_us(i, &pcpu->target_set_time);
pcpu->hispeed_validate_time = pcpu->target_set_time;
pcpu->hispeed_validate_time =
ktime_to_us(ktime_get());
anyboost = 1;
}
@@ -815,14 +792,11 @@ static int cpufreq_governor_interactive(struct cpufreq_policy *policy,
pcpu->policy = policy;
pcpu->target_freq = policy->cur;
pcpu->freq_table = freq_table;
pcpu->target_set_time_in_idle =
get_cpu_idle_time_us(j,
&pcpu->target_set_time);
pcpu->floor_freq = pcpu->target_freq;
pcpu->floor_validate_time =
pcpu->target_set_time;
ktime_to_us(ktime_get());
pcpu->hispeed_validate_time =
pcpu->target_set_time;
pcpu->floor_validate_time;
pcpu->governor_enabled = 1;
smp_wmb();
pcpu->cpu_timer.expires =