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intel_pstate: Add trace point to report internal state.

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Add perf trace event "power:pstate_sample" to report driver state to
aid in diagnosing issues reported against intel_pstate.

Signed-off-by: Dirk Brandewie <dirk.j.brandewie@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Dirk Brandewie
2014-01-16 10:32:25 -08:00
committed by Rafael J. Wysocki
parent 652ed95d5f
commit b69880f9cc
2 changed files with 77 additions and 0 deletions
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include/trace/events/power.h
+53
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@@ -35,6 +35,59 @@ DEFINE_EVENT(cpu, cpu_idle,
TP_ARGS(state, cpu_id)
);
TRACE_EVENT(pstate_sample,
TP_PROTO(u32 core_busy,
u32 scaled_busy,
u32 state,
u64 mperf,
u64 aperf,
u32 energy,
u32 freq
),
TP_ARGS(core_busy,
scaled_busy,
state,
mperf,
aperf,
energy,
freq
),
TP_STRUCT__entry(
__field(u32, core_busy)
__field(u32, scaled_busy)
__field(u32, state)
__field(u64, mperf)
__field(u64, aperf)
__field(u32, energy)
__field(u32, freq)
),
TP_fast_assign(
__entry->core_busy = core_busy;
__entry->scaled_busy = scaled_busy;
__entry->state = state;
__entry->mperf = mperf;
__entry->aperf = aperf;
__entry->energy = energy;
__entry->freq = freq;
),
TP_printk("core_busy=%lu scaled=%lu state=%lu mperf=%llu aperf=%llu energy=%lu freq=%lu ",
(unsigned long)__entry->core_busy,
(unsigned long)__entry->scaled_busy,
(unsigned long)__entry->state,
(unsigned long long)__entry->mperf,
(unsigned long long)__entry->aperf,
(unsigned long)__entry->energy,
(unsigned long)__entry->freq
)
);
/* This file can get included multiple times, TRACE_HEADER_MULTI_READ at top */
#ifndef _PWR_EVENT_AVOID_DOUBLE_DEFINING
#define _PWR_EVENT_AVOID_DOUBLE_DEFINING