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cpufreq: powernv/tracing: Add powernv_throttle tracepoint

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This patch adds the powernv_throttle tracepoint to trace the CPU
frequency throttling event, which is used by the powernv-cpufreq
driver in POWER8.

Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Shilpasri G Bhat 2016-02-03 01:11:40 +05:30 committed by Rafael J. Wysocki
parent 96c4726f01
commit 0306e481d4
2 changed files with 23 additions and 0 deletions
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22
include/trace/events/power.h
View file

@ -38,6 +38,28 @@ DEFINE_EVENT(cpu, cpu_idle,
TP_ARGS(state, cpu_id)
);
TRACE_EVENT(powernv_throttle,
TP_PROTO(int chip_id, const char *reason, int pmax),
TP_ARGS(chip_id, reason, pmax),
TP_STRUCT__entry(
__field(int, chip_id)
__string(reason, reason)
__field(int, pmax)
),
TP_fast_assign(
__entry->chip_id = chip_id;
__assign_str(reason, reason);
__entry->pmax = pmax;
),
TP_printk("Chip %d Pmax %d %s", __entry->chip_id,
__entry->pmax, __get_str(reason))
);
TRACE_EVENT(pstate_sample,
TP_PROTO(u32 core_busy,

1
kernel/trace/power-traces.c
View file

@ -15,4 +15,5 @@
EXPORT_TRACEPOINT_SYMBOL_GPL(suspend_resume);
EXPORT_TRACEPOINT_SYMBOL_GPL(cpu_idle);
EXPORT_TRACEPOINT_SYMBOL_GPL(powernv_throttle);