thermal: add trace events to the power allocator governor
Add trace events for the power allocator governor and the power actor
interface of the cpu cooling device.
Cc: Zhang Rui <rui.zhang@intel.com>
Cc: Eduardo Valentin <edubezval@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@redhat.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Javi Merino <javi.merino@arm.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
diff --git a/drivers/thermal/cpu_cooling.c b/drivers/thermal/cpu_cooling.c
index ba23150..c497414 100644
--- a/drivers/thermal/cpu_cooling.c
+++ b/drivers/thermal/cpu_cooling.c
@@ -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 @@
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 @@
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 @@
return -EINVAL;
}
+ trace_thermal_power_cpu_limit(&cpufreq_device->allowed_cpus,
+ target_freq, *state, power);
return 0;
}