From a1e1951420229c30415b800660ca3de07f148c8d Mon Sep 17 00:00:00 2001
From: Todd Poynor <toddpoynor@google.com>
Date: Thu, 16 Feb 2012 16:27:59 -0800
Subject: cpufreq interactive governor: event tracing

Change-Id: Ic13614a3da2faa2d4bd215ca3eb7191614f0cf66
Signed-off-by: Todd Poynor <toddpoynor@google.com>
---
 drivers/cpufreq/cpufreq_interactive.c | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

(limited to 'drivers/cpufreq')

diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c
index 8a5cd15512c..64078849faa 100644
--- a/drivers/cpufreq/cpufreq_interactive.c
+++ b/drivers/cpufreq/cpufreq_interactive.c
@@ -29,6 +29,9 @@
 #include <linux/kthread.h>
 #include <linux/mutex.h>
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/cpufreq_interactive.h>
+
 #include <asm/cputime.h>
 
 static atomic_t active_count = ATOMIC_INIT(0);
@@ -181,7 +184,11 @@ static void cpufreq_interactive_timer(unsigned long data)
 	new_freq = pcpu->freq_table[index].frequency;
 
 	if (pcpu->target_freq == new_freq)
+	{
+		trace_cpufreq_interactive_already(data, cpu_load,
+						  pcpu->target_freq, new_freq);
 		goto rearm_if_notmax;
+	}
 
 	/*
 	 * Do not scale down unless we have been at this frequency for the
@@ -189,10 +196,16 @@ static void cpufreq_interactive_timer(unsigned long data)
 	 */
 	if (new_freq < pcpu->target_freq) {
 		if (pcpu->timer_run_time - pcpu->freq_change_time
-		    < min_sample_time)
+		    < min_sample_time) {
+			trace_cpufreq_interactive_notyet(data, cpu_load,
+					 pcpu->target_freq, new_freq);
 			goto rearm;
+		}
 	}
 
+	trace_cpufreq_interactive_target(data, cpu_load, pcpu->target_freq,
+					 new_freq);
+
 	if (new_freq < pcpu->target_freq) {
 		pcpu->target_freq = new_freq;
 		spin_lock_irqsave(&down_cpumask_lock, flags);
@@ -380,6 +393,8 @@ static int cpufreq_interactive_up_task(void *data)
 			pcpu->freq_change_time_in_idle =
 				get_cpu_idle_time_us(cpu,
 						     &pcpu->freq_change_time);
+			trace_cpufreq_interactive_up(cpu, pcpu->target_freq,
+						     pcpu->policy->cur);
 		}
 	}
 
@@ -426,6 +441,8 @@ static void cpufreq_interactive_freq_down(struct work_struct *work)
 		pcpu->freq_change_time_in_idle =
 			get_cpu_idle_time_us(cpu,
 					     &pcpu->freq_change_time);
+		trace_cpufreq_interactive_down(cpu, pcpu->target_freq,
+					       pcpu->policy->cur);
 	}
 }
 
-- 
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