Update etc scripts to include governor

It needs to be in performance, not powersave, to work well on my
machine.

While we're at it, also have the scripts print usage if you pass no
arguments, rather than giving an error message about $1 being unset.

1 files changed, 25 insertions, 0 deletions

diff --git a/etc/governor.sh b/etc/governor.sh
new file mode 100755
index 000000000..caabb9da8
--- /dev/null
+++ b/etc/governor.sh
@@ -0,0 +1,25 @@
+#!/bin/sh
+set -eu
+
+usage() {
+  generators="$1"
+  echo "USAGE: $0 <$(echo "$generators" | tr ' ' '|')>"
+  exit 111
+}
+
+
+for cpu in "/sys/devices/system/cpu/cpu"[0-9]* ; do
+  if grep -vq '^1$' "$cpu/online" 2>/dev/null; then
+    continue
+  fi
+  generators="$(cat "$cpu/cpufreq/scaling_available_governors")"
+  if [ "$#" -eq 0 ] || [ -z "$1" ]; then
+    usage "$generators"
+  elif (echo -n "$generators" | tr ' ' '\n' | grep -q "^$1\$" 2>/dev/null); then
+    if grep -vq "^$1\$" "$cpu/cpufreq/scaling_governor" 2>/dev/null; then
+      echo "$1" > "$cpu/cpufreq/scaling_governor"
+    fi
+  else
+    usage "$generators"
+  fi
+done