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Commit db1dc42c authored by Ruchi Kandoi's avatar Ruchi Kandoi
Browse files

trace: cpufreq: Add tracing for min/max cpufreq 



Change-Id: I73f6ec437c1f805437d9376abb6510d1364b07ec
Signed-off-by: default avatarRuchi Kandoi <kandoiruchi@google.com>
parent 0627fa13

Documentation/trace/events-power.txt

+1 −0
Original line number Diff line number Diff line
@@ -25,6 +25,7 @@ cpufreq. 


cpu_idle		"state=%lu cpu_id=%lu"

cpu_frequency		"state=%lu cpu_id=%lu"

cpu_frequency_limits	"min=%lu max=%lu cpu_id=%lu"



A suspend event is used to indicate the system going in and out of the

suspend mode:

drivers/cpufreq/cpufreq.c

+1 −0
Original line number Diff line number Diff line
@@ -2202,6 +2202,7 @@ static int cpufreq_set_policy(struct cpufreq_policy *policy, 


	policy->min = new_policy->min;

	policy->max = new_policy->max;

	trace_cpu_frequency_limits(policy->max, policy->min, policy->cpu);



	pr_debug("new min and max freqs are %u - %u kHz\n",

		 policy->min, policy->max);

include/trace/events/power.h

+25 −1
Original line number Diff line number Diff line
@@ -111,8 +111,32 @@ DEFINE_EVENT(cpu, cpu_frequency, 
	TP_ARGS(frequency, cpu_id)

);



TRACE_EVENT(device_pm_callback_start,

TRACE_EVENT(cpu_frequency_limits,



	TP_PROTO(unsigned int max_freq, unsigned int min_freq,

		unsigned int cpu_id),



	TP_ARGS(max_freq, min_freq, cpu_id),



	TP_STRUCT__entry(

		__field(	u32,		min_freq	)

		__field(	u32,		max_freq	)

		__field(	u32,		cpu_id		)

	),



	TP_fast_assign(

		__entry->min_freq = min_freq;

		__entry->max_freq = min_freq;

		__entry->cpu_id = cpu_id;

	),



	TP_printk("min=%lu max=%lu cpu_id=%lu",

		  (unsigned long)__entry->min_freq,

		  (unsigned long)__entry->max_freq,

		  (unsigned long)__entry->cpu_id)

);



TRACE_EVENT(device_pm_callback_start,

	TP_PROTO(struct device *dev, const char *pm_ops, int event),



	TP_ARGS(dev, pm_ops, event),