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From: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
To: linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org
Cc: rjw@rjwysocki.net, viresh.kumar@linaro.org,
	linux-pm@vger.kernel.org, pc@us.ibm.com, anton@samba.org,
	ego@linux.vnet.ibm.com, shreyas@linux.vnet.ibm.com,
	Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>,
	Ingo Molnar <mingo@redhat.com>,
	Steven Rostedt <rostedt@goodmis.org>
Subject: [PATCH v6 3/5] cpufreq: powernv/tracing: Add powernv_throttle tracepoint
Date: Fri, 22 Jan 2016 12:49:03 +0530	[thread overview]
Message-ID: <1453447145-17722-4-git-send-email-shilpa.bhat@linux.vnet.ibm.com> (raw)
In-Reply-To: <1453447145-17722-1-git-send-email-shilpa.bhat@linux.vnet.ibm.com>

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>
CC: Ingo Molnar <mingo@redhat.com>
CC: Steven Rostedt <rostedt@goodmis.org>
---
No changes since v2.

 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);
 
-- 
1.9.3

  parent reply	other threads:[~2016-01-22  7:20 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-22  7:19 [PATCH v6 0/5] cpufreq: powernv: Redesign the presentation of throttle notification and solve bug-fixes in the driver Shilpasri G Bhat
2016-01-22  7:19 ` [PATCH v6 1/5] cpufreq: powernv: Hot-plug safe the kworker thread Shilpasri G Bhat
2016-01-25  5:49   ` Viresh Kumar
2016-01-22  7:19 ` [PATCH v6 2/5] cpufreq: powernv: Remove cpu_to_chip_id() from hot-path Shilpasri G Bhat
2016-01-23  8:59   ` Balbir Singh
2016-01-25  5:38     ` Gautham R Shenoy
2016-01-25  5:53   ` Viresh Kumar
2016-01-22  7:19 ` Shilpasri G Bhat [this message]
2016-01-22  7:19 ` [PATCH v6 4/5] cpufreq: powernv: Replace pr_info with trace print for throttle event Shilpasri G Bhat
2016-01-25  5:58   ` Viresh Kumar
2016-01-22  7:19 ` [PATCH v6 5/5] cpufreq: powernv: Add sysfs attributes to show throttle stats Shilpasri G Bhat
2016-01-23  8:40   ` Balbir Singh
2016-01-25  6:46     ` Shilpasri G Bhat
2016-01-25  5:43   ` [v6, " Michael Ellerman

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