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thermal: add trace events to the power allocator governor

Browse source 
Add trace events for the power allocator governor and the power actor
interface of the cpu cooling device.

Cc: Zhang Rui <[email protected]>
Cc: Eduardo Valentin <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Ingo Molnar <[email protected]>
Acked-by: Steven Rostedt <[email protected]>
Signed-off-by: Javi Merino <[email protected]>
Signed-off-by: Eduardo Valentin <[email protected]>
This commit is contained in:
Javi Merino 2015-03-02 17:17:20 +00:00 • committed by Eduardo Valentin
commit 6828a4711f
4 changed files with 194 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

31
drivers/thermal/cpu_cooling.c
View file

@ -31,6 +31,8 @@
#include <linux/cpu.h>
#include <linux/cpu_cooling.h>
#include <trace/events/thermal.h>
/*
* Cooling state <-> CPUFreq frequency
*
@ -588,12 +590,20 @@ static int cpufreq_get_requested_power(struct thermal_cooling_device *cdev,
u32 *power)
{
unsigned long freq;
int cpu, ret;
int i = 0, cpu, ret;
u32 static_power, dynamic_power, total_load = 0;
struct cpufreq_cooling_device *cpufreq_device = cdev->devdata;
u32 *load_cpu = NULL;
freq = cpufreq_quick_get(cpumask_any(&cpufreq_device->allowed_cpus));
if (trace_thermal_power_cpu_get_power_enabled()) {
u32 ncpus = cpumask_weight(&cpufreq_device->allowed_cpus);
load_cpu = devm_kcalloc(&cdev->device, ncpus, sizeof(*load_cpu),
GFP_KERNEL);
}
for_each_cpu(cpu, &cpufreq_device->allowed_cpus) {
u32 load;
@ -603,14 +613,29 @@ static int cpufreq_get_requested_power(struct thermal_cooling_device *cdev,
load = 0;
total_load += load;
if (trace_thermal_power_cpu_limit_enabled() && load_cpu)
load_cpu[i] = load;
i++;
}
cpufreq_device->last_load = total_load;
dynamic_power = get_dynamic_power(cpufreq_device, freq);
ret = get_static_power(cpufreq_device, tz, freq, &static_power);
if (ret)
if (ret) {
if (load_cpu)
devm_kfree(&cdev->device, load_cpu);
return ret;
}
if (load_cpu) {
trace_thermal_power_cpu_get_power(
&cpufreq_device->allowed_cpus,
freq, load_cpu, i, dynamic_power, static_power);
devm_kfree(&cdev->device, load_cpu);
}
*power = static_power + dynamic_power;
return 0;
@ -718,6 +743,8 @@ static int cpufreq_power2state(struct thermal_cooling_device *cdev,
return -EINVAL;
}
trace_thermal_power_cpu_limit(&cpufreq_device->allowed_cpus,
target_freq, *state, power);
return 0;
}

22
drivers/thermal/power_allocator.c
View file

@ -19,6 +19,9 @@
#include <linux/slab.h>
#include <linux/thermal.h>
#define CREATE_TRACE_POINTS
#include <trace/events/thermal_power_allocator.h>
#include "thermal_core.h"
#define FRAC_BITS 10
@ -138,7 +141,14 @@ static u32 pid_controller(struct thermal_zone_device *tz,
/* feed-forward the known sustainable dissipatable power */
power_range = tz->tzp->sustainable_power + frac_to_int(power_range);
return clamp(power_range, (s64)0, (s64)max_allocatable_power);
power_range = clamp(power_range, (s64)0, (s64)max_allocatable_power);
trace_thermal_power_allocator_pid(tz, frac_to_int(err),
frac_to_int(params->err_integral),
frac_to_int(p), frac_to_int(i),
frac_to_int(d), power_range);
return power_range;
}
/**
@ -219,7 +229,7 @@ static int allocate_power(struct thermal_zone_device *tz,
struct power_allocator_params *params = tz->governor_data;
u32 *req_power, *max_power, *granted_power, *extra_actor_power;
u32 total_req_power, max_allocatable_power;
u32 power_range;
u32 total_granted_power, power_range;
int i, num_actors, total_weight, ret = 0;
int trip_max_desired_temperature = params->trip_max_desired_temperature;
@ -295,6 +305,7 @@ static int allocate_power(struct thermal_zone_device *tz,
divvy_up_power(req_power, max_power, num_actors, total_req_power,
power_range, granted_power, extra_actor_power);
total_granted_power = 0;
i = 0;
list_for_each_entry(instance, &tz->thermal_instances, tz_node) {
if (instance->trip != trip_max_desired_temperature)
@ -305,10 +316,17 @@ static int allocate_power(struct thermal_zone_device *tz,
power_actor_set_power(instance->cdev, instance,
granted_power[i]);
total_granted_power += granted_power[i];
i++;
}
trace_thermal_power_allocator(tz, req_power, total_req_power,
granted_power, total_granted_power,
num_actors, power_range,
max_allocatable_power, current_temp,
(s32)control_temp - (s32)current_temp);
devm_kfree(&tz->device, req_power);
unlock:
mutex_unlock(&tz->lock);