devfreq_cooling: add trace information
Tracing is useful for debugging and performance tuning. Add similar traces to what's present in the cpu cooling device. Cc: Zhang Rui <rui.zhang@intel.com> Cc: Eduardo Valentin <edubezval@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> Signed-off-by: Javi Merino <javi.merino@arm.com> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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@ -25,6 +25,8 @@
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#include <linux/pm_opp.h>
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#include <linux/thermal.h>
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#include <trace/events/thermal.h>
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static DEFINE_MUTEX(devfreq_lock);
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static DEFINE_IDR(devfreq_idr);
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@ -293,6 +295,9 @@ static int devfreq_cooling_get_requested_power(struct thermal_cooling_device *cd
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/* Get static power */
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static_power = get_static_power(dfc, freq);
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trace_thermal_power_devfreq_get_power(cdev, status, freq, dyn_power,
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static_power);
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*power = dyn_power + static_power;
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return 0;
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@ -348,6 +353,7 @@ static int devfreq_cooling_power2state(struct thermal_cooling_device *cdev,
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break;
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*state = i;
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trace_thermal_power_devfreq_limit(cdev, freq, *state, power);
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return 0;
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}
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@ -4,6 +4,7 @@
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#if !defined(_TRACE_THERMAL_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_THERMAL_H
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#include <linux/devfreq.h>
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#include <linux/thermal.h>
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#include <linux/tracepoint.h>
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@ -135,6 +136,58 @@ TRACE_EVENT(thermal_power_cpu_limit,
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__entry->power)
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);
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TRACE_EVENT(thermal_power_devfreq_get_power,
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TP_PROTO(struct thermal_cooling_device *cdev,
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struct devfreq_dev_status *status, unsigned long freq,
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u32 dynamic_power, u32 static_power),
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TP_ARGS(cdev, status, freq, dynamic_power, static_power),
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TP_STRUCT__entry(
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__string(type, cdev->type )
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__field(unsigned long, freq )
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__field(u32, load )
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__field(u32, dynamic_power )
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__field(u32, static_power )
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),
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TP_fast_assign(
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__assign_str(type, cdev->type);
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__entry->freq = freq;
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__entry->load = (100 * status->busy_time) / status->total_time;
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__entry->dynamic_power = dynamic_power;
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__entry->static_power = static_power;
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),
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TP_printk("type=%s freq=%lu load=%u dynamic_power=%u static_power=%u",
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__get_str(type), __entry->freq,
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__entry->load, __entry->dynamic_power, __entry->static_power)
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);
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TRACE_EVENT(thermal_power_devfreq_limit,
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TP_PROTO(struct thermal_cooling_device *cdev, unsigned long freq,
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unsigned long cdev_state, u32 power),
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TP_ARGS(cdev, freq, cdev_state, power),
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TP_STRUCT__entry(
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__string(type, cdev->type)
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__field(unsigned int, freq )
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__field(unsigned long, cdev_state)
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__field(u32, power )
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),
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TP_fast_assign(
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__assign_str(type, cdev->type);
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__entry->freq = freq;
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__entry->cdev_state = cdev_state;
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__entry->power = power;
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),
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TP_printk("type=%s freq=%u cdev_state=%lu power=%u",
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__get_str(type), __entry->freq, __entry->cdev_state,
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__entry->power)
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);
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#endif /* _TRACE_THERMAL_H */
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/* This part must be outside protection */
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