| Message ID | 20180719195957.59000-1-joel@joelfernandes.org (mailing list archive) |
|---|---|
| State | Changes Requested, archived |
| Headers | show |
On 19-07-18, 12:59, Joel Fernandes wrote: > From: Ruchi Kandoi <kandoiruchi@google.com> > > systrace used for tracing for Android systems has carried a patch for > many years in the Android tree that traces when the cpufreq limits > change. With the help of this information, systrace can know when the > policy limits change and can visually display the data. Lets add > upstream support for the same. > > Signed-off-by: Ruchi Kandoi <kandoiruchi@google.com> > Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org> > --- > Documentation/trace/events-power.rst | 1 + > drivers/cpufreq/cpufreq.c | 1 + > include/trace/events/power.h | 25 +++++++++++++++++++++++++ > 3 files changed, 27 insertions(+) > > diff --git a/Documentation/trace/events-power.rst b/Documentation/trace/events-power.rst > index a77daca75e30..2ef318962e29 100644 > --- a/Documentation/trace/events-power.rst > +++ b/Documentation/trace/events-power.rst > @@ -27,6 +27,7 @@ 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" The order of prints is min,max,id > > A suspend event is used to indicate the system going in and out of the > suspend mode: > diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c > index b0dfd3222013..6533c6987866 100644 > --- a/drivers/cpufreq/cpufreq.c > +++ b/drivers/cpufreq/cpufreq.c > @@ -2236,6 +2236,7 @@ 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); But arguments are max,min,cpu Lets align them and make it min/max/id everywhere for readability. > > policy->cached_target_freq = UINT_MAX; > > diff --git a/include/trace/events/power.h b/include/trace/events/power.h > index 908977d69783..e978b05b0200 100644 > --- a/include/trace/events/power.h > +++ b/include/trace/events/power.h > @@ -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), > -- > 2.18.0.203.gfac676dfb9-goog
diff --git a/Documentation/trace/events-power.rst b/Documentation/trace/events-power.rst index a77daca75e30..2ef318962e29 100644 --- a/Documentation/trace/events-power.rst +++ b/Documentation/trace/events-power.rst @@ -27,6 +27,7 @@ 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: diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index b0dfd3222013..6533c6987866 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -2236,6 +2236,7 @@ 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; diff --git a/include/trace/events/power.h b/include/trace/events/power.h index 908977d69783..e978b05b0200 100644 --- a/include/trace/events/power.h +++ b/include/trace/events/power.h @@ -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),