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[PATCH v4 2/4] 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>
CC: Ingo Molnar <mingo@redhat.com>
CC: Steven Rostedt <rostedt@goodmis.org>
---
No changes from v2 and v3.

 include/trace/events/power.h | 22 ++++++++++++++++++++++
 kernel/trace/power-traces.c  |  1 +
 2 files changed, 23 insertions(+)

diff --git a/include/trace/events/power.h b/include/trace/events/power.h
index 284244e..19e5030 100644
--- a/include/trace/events/power.h
+++ b/include/trace/events/power.h
@@ -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,
diff --git a/kernel/trace/power-traces.c b/kernel/trace/power-traces.c
index eb4220a..81b8745 100644
--- a/kernel/trace/power-traces.c
+++ b/kernel/trace/power-traces.c
@@ -15,4 +15,5 @@
 
 EXPORT_TRACEPOINT_SYMBOL_GPL(suspend_resume);
 EXPORT_TRACEPOINT_SYMBOL_GPL(cpu_idle);
+EXPORT_TRACEPOINT_SYMBOL_GPL(powernv_throttle);
 
-- 
1.9.1

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[PATCH v3 0/2] cpufreq: powernv: Redesign the presentation of throttle notification Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> - 2016-01-04 10:30 +0100
  [PATCH v3 2/2] cpufreq: powernv: Redesign the presentation of throttle notification Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> - 2016-01-04 10:30 +0100
  [PATCH v3 1/2] cpufreq: powernv/tracing: Add powernv_throttle tracepoint Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> - 2016-01-04 10:30 +0100
  Re: [PATCH v3 0/2] cpufreq: powernv: Redesign the presentation of throttle notification Stewart Smith <stewart@linux.vnet.ibm.com> - 2016-01-06 08:00 +0100
  [PATCH v4 4/4] cpufreq: powernv: Add sysfs attributes to show throttle stats Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> - 2016-01-11 22:00 +0100
  [PATCH v4 2/4] cpufreq: powernv/tracing: Add powernv_throttle tracepoint Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> - 2016-01-11 22:00 +0100
  [PATCH v4 1/4] cpufreq: powernv: Remove cpu_to_chip_id() from hot-path Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> - 2016-01-11 22:00 +0100
  [PATCH v4 0/4] cpufreq: powernv: Redesign the presentation of throttle notification Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> - 2016-01-11 22:00 +0100
    [PATCH v4 3/4] cpufreq: powernv: Add a trace print for the throttle event Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com> - 2016-01-11 22:00 +0100
    Re: [PATCH v4 0/4] cpufreq: powernv: Redesign the presentation of  throttle notification Greg KH <gregkh@linuxfoundation.org> - 2016-01-11 23:30 +0100
      Re: [PATCH v4 0/4] cpufreq: powernv: Redesign the presentation of  throttle notification Viresh Kumar <viresh.kumar@linaro.org> - 2016-01-12 03:40 +0100

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