commit 5de1d7573d26175ffcef9e03221e412c7b1ea9f8
author Iliyan Malchev <malchev@google.com> Wed Nov 26 01:04:01 2014 -0800
committer The Android Automerger <android-build@android.com> Mon Dec 01 11:42:27 2014 -0800
tree 41a4258c0bfec5038f9a13aa8afc78e72f74e42c
parent b5717b8c1f2c5964099744e012264f15772c7d29

grouper: power hal: improve interactive loads

-- ignore set_interactive(0) mode sets
-- decrease cpu load from 85% to 75% before ramping up; this way a core's
   frequency will be maxed out more aggressively
-- increase the hold time at max freq from 30ms to 500ms before beinning to
   ramp down; this way a core will stay longer at the maximum frequency, once
   there
-- increase timer sampling rate from 20ms to 50ms; this way cpufreq ramdown
   will be slower

Change-Id: I5d7e387f96db3601a2ab95fbac71359c7b3e81ba
Signed-off-by: Iliyan Malchev <malchev@google.com>

power/power.c

diff --git a/power/power.c b/power/power.c
index 654d73a..b5e25f7 100644
--- a/power/power.c
+++ b/power/power.c
@@ -187,11 +187,11 @@
      */
 
     sysfs_write("/sys/devices/system/cpu/cpufreq/interactive/timer_rate",
-                "20000");
+                "50000");
     sysfs_write("/sys/devices/system/cpu/cpufreq/interactive/min_sample_time",
-                "30000");
+                "500000");
     sysfs_write("/sys/devices/system/cpu/cpufreq/interactive/go_hispeed_load",
-                "85");
+                "75");
     sysfs_write("/sys/devices/system/cpu/cpufreq/interactive/boost_factor",
 		"0");
     sysfs_write("/sys/devices/system/cpu/cpufreq/interactive/input_boost",
@@ -199,22 +199,9 @@
     uevent_init();
 }
 
-static void grouper_power_set_interactive( __attribute__((unused)) struct power_module *module, int on)
+static void grouper_power_set_interactive(__attribute__((unused)) struct power_module *module,
+                                          __attribute__((unused)) int on)
 {
-    /*
-     * Lower maximum frequency when screen is off.  CPU 0 and 1 share a
-     * cpufreq policy.
-     */
-
-    sysfs_write("/sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq",
-                on ? "1300000" : "700000");
-
-    sysfs_write("/sys/devices/system/cpu/cpufreq/interactive/input_boost",
-                on ? "1" : "0");
-
-    sysfs_write("/sys/devices/system/cpu/cpufreq/interactive/boost_factor",
-                on ? "0" : "2");
-
 }
 
 static void grouper_power_hint(__attribute__((unused)) struct power_module *module, power_hint_t hint,