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ANDROID: trace: cpufreq: Add tracing for min/max cpufreq

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Change-Id: I73f6ec437c1f805437d9376abb6510d1364b07ec
Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com>

[AmitP: Folded following android-4.9 commit changes into this patch
        d335459377f7 ("ANDROID: trace: cpufreq: fix typo in min/max cpufreq")]
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
This commit is contained in:
Ruchi Kandoi
2015-11-19 16:07:19 -08:00
committed by Amit Pundir
parent d6e6101596
commit 9ff14099c7
3 changed files with 27 additions and 0 deletions
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1
Documentation/trace/events-power.txt
View File

@@ -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:

1
drivers/cpufreq/cpufreq.c
View File

@@ -2232,6 +2232,7 @@ 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);
policy->cached_target_freq = UINT_MAX;

25
include/trace/events/power.h
View File

@@ -148,6 +148,31 @@ DEFINE_EVENT(cpu, cpu_frequency,
TP_ARGS(frequency, cpu_id)
);
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 = max_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),