tracing, perf: Add more power related events

This patch adds new generic events for dynamic power management
tracing:

 - clock events class: used for clock enable/disable and for
   clock rate change,
 - power_domain events class: used for power domains transitions.

The OMAP architecture will be using the new events for PM debugging,
however the new events are made generic enough to be used by all
platforms.

Signed-off-by: Jean Pihet <j-pihet@ti.com>
Acked-by: Thomas Renninger <trenn@suse.de>
Cc: discuss@lesswatts.org
Cc: linux-pm@lists.linux-foundation.org
Cc: Thomas Renninger <trenn@suse.de>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Len Brown <len.brown@intel.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
LKML-Reference: <AANLkTinUmbSUUuxUzc8++pcb9gd1CZFdyTQFrveTBXyV@mail.gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/include/trace/events/power.h b/include/trace/events/power.h
index 35a2a6e7bf1e74992b8b83b242c4a507fed4246f..286784d69b8f480343244d8046327a5a7d9883d9 100644 (file)
--- a/include/trace/events/power.h
+++ b/include/trace/events/power.h
@@ -10,12 +10,17 @@
 #ifndef _TRACE_POWER_ENUM_
 #define _TRACE_POWER_ENUM_
 enum {
-       POWER_NONE = 0,
-       POWER_CSTATE = 1,
-       POWER_PSTATE = 2,
+       POWER_NONE      = 0,
+       POWER_CSTATE    = 1,    /* C-State */
+       POWER_PSTATE    = 2,    /* Fequency change or DVFS */
+       POWER_SSTATE    = 3,    /* Suspend */
 };
 #endif
 
+/*
+ * The power events are used for cpuidle & suspend (power_start, power_end)
+ *  and for cpufreq (power_frequency)
+ */
 DECLARE_EVENT_CLASS(power,
 
        TP_PROTO(unsigned int type, unsigned int state, unsigned int cpu_id),
@@ -70,6 +75,85 @@ TRACE_EVENT(power_end,
 
 );
 
+/*
+ * The clock events are used for clock enable/disable and for
+ *  clock rate change
+ */
+DECLARE_EVENT_CLASS(clock,
+
+       TP_PROTO(const char *name, unsigned int state, unsigned int cpu_id),
+
+       TP_ARGS(name, state, cpu_id),
+
+       TP_STRUCT__entry(
+               __string(       name,           name            )
+               __field(        u64,            state           )
+               __field(        u64,            cpu_id          )
+       ),
+
+       TP_fast_assign(
+               __assign_str(name, name);
+               __entry->state = state;
+               __entry->cpu_id = cpu_id;
+       ),
+
+       TP_printk("%s state=%lu cpu_id=%lu", __get_str(name),
+               (unsigned long)__entry->state, (unsigned long)__entry->cpu_id)
+);
+
+DEFINE_EVENT(clock, clock_enable,
+
+       TP_PROTO(const char *name, unsigned int state, unsigned int cpu_id),
+
+       TP_ARGS(name, state, cpu_id)
+);
+
+DEFINE_EVENT(clock, clock_disable,
+
+       TP_PROTO(const char *name, unsigned int state, unsigned int cpu_id),
+
+       TP_ARGS(name, state, cpu_id)
+);
+
+DEFINE_EVENT(clock, clock_set_rate,
+
+       TP_PROTO(const char *name, unsigned int state, unsigned int cpu_id),
+
+       TP_ARGS(name, state, cpu_id)
+);
+
+/*
+ * The power domain events are used for power domains transitions
+ */
+DECLARE_EVENT_CLASS(power_domain,
+
+       TP_PROTO(const char *name, unsigned int state, unsigned int cpu_id),
+
+       TP_ARGS(name, state, cpu_id),
+
+       TP_STRUCT__entry(
+               __string(       name,           name            )
+               __field(        u64,            state           )
+               __field(        u64,            cpu_id          )
+       ),
+
+       TP_fast_assign(
+               __assign_str(name, name);
+               __entry->state = state;
+               __entry->cpu_id = cpu_id;
+),
+
+       TP_printk("%s state=%lu cpu_id=%lu", __get_str(name),
+               (unsigned long)__entry->state, (unsigned long)__entry->cpu_id)
+);
+
+DEFINE_EVENT(power_domain, power_domain_target,
+
+       TP_PROTO(const char *name, unsigned int state, unsigned int cpu_id),
+
+       TP_ARGS(name, state, cpu_id)
+);
+
 #endif /* _TRACE_POWER_H */
 
 /* This part must be outside protection */