diff options
| author | Todd Poynor <toddpoynor@google.com> | 2012-04-20 13:18:32 -0700 |
|---|---|---|
| committer | Anton Vorontsov <anton.vorontsov@linaro.org> | 2012-11-05 11:47:05 -0800 |
| commit | c727f0abb883a8af0eca9a3f0671e4ef34bca6fa (patch) | |
| tree | 2af32411055c36723d31a565671da1e32e22417a | |
| parent | 2a9561086e5bc3c55cdd2cef6d575cfdd31543cb (diff) | |
| download | linux-topics-c727f0abb883a8af0eca9a3f0671e4ef34bca6fa.tar.gz | |
cpufreq: interactive: Separate speed target revalidate time and initial set time
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>
| -rw-r--r-- | drivers/cpufreq/cpufreq_interactive.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c index 748e55b043e..0ef53e9381f 100644 --- a/drivers/cpufreq/cpufreq_interactive.c +++ b/drivers/cpufreq/cpufreq_interactive.c @@ -45,6 +45,8 @@ 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; @@ -207,10 +209,10 @@ 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); @@ -218,8 +220,8 @@ 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, @@ -229,6 +231,8 @@ 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; @@ -613,6 +617,10 @@ 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(); } |