From 77417b69a8876135dd3f3d8a231baef37c345426 Mon Sep 17 00:00:00 2001 From: Todd Poynor Date: Mon, 23 Apr 2012 20:42:41 -0700 Subject: [PATCH] cpufreq: interactive: Add sysfs boost interface for hints from userspace The explicit hint on/off version. Change-Id: Ibf62b6d45bf6fb8c9c055b9bdaf074ce9374c04f Signed-off-by: Todd Poynor --- Documentation/cpu-freq/governors.txt | 3 ++ drivers/cpufreq/cpufreq_interactive.c | 48 ++++++++++++++++++++-- include/trace/events/cpufreq_interactive.h | 13 ++++++ 3 files changed, 60 insertions(+), 4 deletions(-) diff --git a/Documentation/cpu-freq/governors.txt b/Documentation/cpu-freq/governors.txt index 2813a04a4fda..a9a8705ea9a7 100644 --- a/Documentation/cpu-freq/governors.txt +++ b/Documentation/cpu-freq/governors.txt @@ -267,6 +267,9 @@ not idle. Default is 20000 uS. input_boost: If non-zero, boost speed of all CPUs to hispeed_freq on touchscreen activity. Default is 0. +boost: If non-zero, immediately boost speed of all CPUs to +hispeed_freq. If zero, allow CPU speeds to drop below hispeed_freq. + 3. The Governor Interface in the CPUfreq Core ============================================= diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c index 90db2c30e2f9..07b7cafaffdd 100644 --- a/drivers/cpufreq/cpufreq_interactive.c +++ b/drivers/cpufreq/cpufreq_interactive.c @@ -31,12 +31,11 @@ #include #include #include +#include #define CREATE_TRACE_POINTS #include -#include - static atomic_t active_count = ATOMIC_INIT(0); struct cpufreq_interactive_cpuinfo { @@ -94,7 +93,7 @@ static unsigned long timer_rate; static unsigned long above_hispeed_delay_val; /* - * Boost to hispeed on touchscreen input. + * Boost pulse to hispeed on touchscreen input. */ static int input_boost_val; @@ -106,6 +105,12 @@ struct cpufreq_interactive_inputopen { static struct cpufreq_interactive_inputopen inputopen; +/* + * Non-zero means longer-term speed boost active. + */ + +static int boost_val; + static int cpufreq_governor_interactive(struct cpufreq_policy *policy, unsigned int event); @@ -189,7 +194,7 @@ static void cpufreq_interactive_timer(unsigned long data) if (load_since_change > cpu_load) cpu_load = load_since_change; - if (cpu_load >= go_hispeed_load) { + if (cpu_load >= go_hispeed_load || boost_val) { if (pcpu->target_freq <= pcpu->policy->min) { new_freq = hispeed_freq; } else { @@ -517,6 +522,12 @@ static void cpufreq_interactive_boost(void) wake_up_process(up_task); } +/* + * Pulsed boost on input event raises CPUs to hispeed_freq and lets + * usual algorithm of min_sample_time decide when to allow speed + * to drop. + */ + static void cpufreq_interactive_input_event(struct input_handle *handle, unsigned int type, unsigned int code, int value) @@ -732,6 +743,34 @@ static ssize_t store_input_boost(struct kobject *kobj, struct attribute *attr, define_one_global_rw(input_boost); +static ssize_t show_boost(struct kobject *kobj, struct attribute *attr, + char *buf) +{ + return sprintf(buf, "%d\n", boost_val); +} + +static ssize_t store_boost(struct kobject *kobj, struct attribute *attr, + const char *buf, size_t count) +{ + int ret; + unsigned long val; + + ret = kstrtoul(buf, 0, &val); + if (ret < 0) + return ret; + + boost_val = val; + + if (boost_val) + cpufreq_interactive_boost(); + else + trace_cpufreq_interactive_unboost(hispeed_freq); + + return count; +} + +define_one_global_rw(boost); + static struct attribute *interactive_attributes[] = { &hispeed_freq_attr.attr, &go_hispeed_load_attr.attr, @@ -739,6 +778,7 @@ static struct attribute *interactive_attributes[] = { &min_sample_time_attr.attr, &timer_rate_attr.attr, &input_boost.attr, + &boost.attr, NULL, }; diff --git a/include/trace/events/cpufreq_interactive.h b/include/trace/events/cpufreq_interactive.h index 19e070b897ac..ae6f232e498f 100644 --- a/include/trace/events/cpufreq_interactive.h +++ b/include/trace/events/cpufreq_interactive.h @@ -93,6 +93,19 @@ TRACE_EVENT(cpufreq_interactive_boost, ), TP_printk("freq=%lu", __entry->freq) ); + +TRACE_EVENT(cpufreq_interactive_unboost, + TP_PROTO(unsigned long freq), + TP_ARGS(freq), + TP_STRUCT__entry( + __field(unsigned long, freq) + ), + TP_fast_assign( + __entry->freq = freq; + ), + TP_printk("freq=%lu", __entry->freq) +); + #endif /* _TRACE_CPUFREQ_INTERACTIVE_H */ /* This part must be outside protection */ -- 2.34.1