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authorJavi Merino <javi.merino@arm.com>2015-03-02 17:17:20 +0000
committerEduardo Valentin <edubezval@gmail.com>2015-05-04 21:27:52 -0700
commit6828a4711f994bbd9d3fd27b7a541217fc37b341 (patch)
tree9a4bc66a10f15492d670fdc730eb65a07cfab7ed /drivers/thermal/power_allocator.c
parent6b775e870c56c59c3e16531ea2307b797395f9f7 (diff)
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>
Diffstat (limited to 'drivers/thermal/power_allocator.c')
-rw-r--r--drivers/thermal/power_allocator.c22
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/thermal/power_allocator.c b/drivers/thermal/power_allocator.c
index 67982d79b76c..3ca7530deac6 100644
--- a/drivers/thermal/power_allocator.c
+++ b/drivers/thermal/power_allocator.c
@@ -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);