File onbattery.patch of Package pm-profiler

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File onbattery.patch of Package pm-profiler

When on UPS battery, low power consumption is crucial while waiting for power to return.
Therefore go to lowest possible CPU frequency and "powersave" governor.
There is no code in pm-profiler to switch to this profile on power loss, this has
to be done elsewhere, e.g. in a apcupsd hook (/etc/apcupsd/{on,off}battery).

--- pm-profiler-0.1_20111222/tools/enable-profile.orig	2015-09-24 12:55:10.809416632 +0200
+++ pm-profiler-0.1_20111222/tools/enable-profile	2015-09-24 13:08:02.197673670 +0200
@@ -44,6 +44,32 @@ function cpufreq_governor {
     done
 }
 
+function cpufreq_reset_scaling_max_freq {
+    for I in /sys/devices/system/cpu/cpu[[:digit:]]*/cpufreq; do
+        if [ -r "$I/cpuinfo_max_freq" -a -w "$I/scaling_max_freq" ]; then
+            Maxvalue=`cat $I/cpuinfo_max_freq`
+            Maxscalingvalue=`cat $I/scaling_max_freq`
+            if [ "$Maxvalue" != "$Maxscalingvalue" ]; then
+                echo "$Maxvalue" > $I/scaling_max_freq
+            fi
+        fi
+    done
+}
+
+function cpufreq_minimize_scaling_max_freq {
+    for I in /sys/devices/system/cpu/cpu[[:digit:]]*/cpufreq; do
+        Driver=`cat $I/scaling_driver`
+        Governor=`cat $I/scaling_governor`
+        # the acpi-cpufreq powersave governor already minimizes frequency
+        if [ "$Driver" = "intel_pstate" -o "$Governor" != "powersave" ]; then
+            if [ -r "$I/cpuinfo_max_freq" -a -r "$I/cpuinfo_min_freq" -a -w "$I/scaling_max_freq" ]; then
+                Minvalue=`cat $I/cpuinfo_min_freq`
+                echo "$Minvalue" > $I/scaling_max_freq
+            fi
+        fi
+    done
+}
+
 function cpufreq_ondemand_up_threshold {
     # kernel 3.1 onwards has some cpufreq params at a new toplevel location
     if [ -f /sys/devices/system/cpu/cpu0/cpufreq/ondemand/up_threshold ]; then
@@ -103,7 +129,12 @@ function read_ahead_kb {
     done
 }
 
+
+# in case scaling_max_freq has been reduced, reset value to avoid surprises
+cpufreq_reset_scaling_max_freq
+
 [ -n "$CPUFREQ_GOVERNOR" ] && cpufreq_governor
+[ -n "$CPUFREQ_MINIMIZE_SCALING_MAX_FREQ" ] && cpufreq_minimize_scaling_max_freq
 [ -n "$CPUFREQ_ONDEMAND_UP_THRESHOLD" ] && cpufreq_ondemand_up_threshold
 [ -n "$CPUFREQ_ONDEMAND_SAMPLING_RATE" ] && cpufreq_ondemand_sampling_rate
 [ -n "$CPUFREQ_ONDEMAND_POWERSAVE_BIAS" ] && cpufreq_ondemand_powersave_bias

--- pm-profiler-0.1_20111222/doc/config.template.orig	2011-12-22 08:36:52.000000000 +0100
+++ pm-profiler-0.1_20111222/doc/config.template	2015-09-24 12:26:41.530627277 +0200
@@ -15,6 +15,16 @@ DESCRIPTION=""
 #
 CPUFREQ_GOVERNOR=""
 
+# Minimize the cpu frequency to the minimum allowed value
+# Possible values: Empty string (default) or any non-null string to enable.
+# pm-profiler will reset frequency to full speed if not set.
+#
+# Kernel documentation: admin-guide/pm/cpufreq.rst
+#
+# File: /sys/devices/system/cpu/cpu*/cpufreq/scaling_max_freq
+#
+CPUFREQ_MINIMIZE_SCALING_MAX_FREQ=""
+
 # See http://www.lesswatts.org/tips/cpu.php for a good explanation about
 # what it does
 #

--- /dev/null	1970-01-01 01:00:00.000000000 +0100
+++ pm-profiler-0.1_20111222/profiles/onbattery/config	2015-09-24 12:33:44.066367524 +0200
@@ -0,0 +1,7 @@
+NAME="Onbattery"
+DESCRIPTION="Profile optimized for running on UPS battery."
+CPUFREQ_GOVERNOR="powersave"
+CPUFREQ_MINIMIZE_SCALING_MAX_FREQ="1"
+SATA_ALPM="min_power"
+DIRTY_WRITEBACK_CENTISECS="500"
+READ_AHEAD_KB="128"

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