From 3eb500b11a3faf768cf96fd6034141eff6ffa83c Mon Sep 17 00:00:00 2001
From: Jason Gross <jgross@mit.edu>
Date: Fri, 15 Sep 2017 16:27:58 -0400
Subject: 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.
---
 etc/governor.sh       | 25 +++++++++++++++++++++++++
 etc/hyperthreading.sh | 10 +++++++++-
 etc/machine.sh        | 11 +++++++++++
 etc/turboboost.sh     | 10 +++++++++-
 4 files changed, 54 insertions(+), 2 deletions(-)
 create mode 100755 etc/governor.sh

(limited to 'etc')

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
diff --git a/etc/hyperthreading.sh b/etc/hyperthreading.sh
index 977942965..e003d8fb5 100755
--- a/etc/hyperthreading.sh
+++ b/etc/hyperthreading.sh
@@ -1,6 +1,14 @@
 #!/bin/sh
 set -eu
 
+usage() {
+  echo "USAGE: $0 <on|off>" ; exit 111
+}
+
+if [ "$#" -eq 0 ]; then
+  usage
+fi
+
 case $1 in
    on)
      for f in "/sys/devices/system/cpu/cpu"[0-9]*/online; do
@@ -20,5 +28,5 @@ case $1 in
       cores=$(printf "$cores\n$coreid")
     done
     ;;
-  *) echo "USAGE: hyperthreading.sh <on|off>"
+  *) usage
 esac
diff --git a/etc/machine.sh b/etc/machine.sh
index 5fcb7289a..69edb149a 100755
--- a/etc/machine.sh
+++ b/etc/machine.sh
@@ -1,6 +1,15 @@
 #!/bin/sh
 set -eu
 
+online_governors() {
+  for cpu in "/sys/devices/system/cpu/cpu"[0-9]* ; do
+    if grep -vq '^1$' "$cpu/online" 2>/dev/null; then
+      continue
+    fi
+    cat "$cpu/cpufreq/scaling_governor"
+  done
+}
+
 printf "$(hostname)"
 printf -
 grep -q '[^0-9]' /sys/devices/system/cpu/cpu[0-9]*/topology/thread_siblings_list && printf ht || printf noht
@@ -17,5 +26,7 @@ else
   printf nops
 fi
 printf -
+printf "$(echo -n "$(online_governors | uniq)" | tr '\n' '_')"
+printf -
 printf "$(gcc -march=native -Q --help=target|grep march | cut -d= -f2 | grep -ow '\S*')"
 printf '\n'
diff --git a/etc/turboboost.sh b/etc/turboboost.sh
index f336660ec..69c5ba054 100755
--- a/etc/turboboost.sh
+++ b/etc/turboboost.sh
@@ -1,8 +1,16 @@
 #!/bin/sh
 set -eu
 
+usage() {
+  echo "USAGE: $0 <on|off>" ; exit 111
+}
+
+if [ "$#" -eq 0 ]; then
+  usage
+fi
+
 case $1 in
   on) echo 0 > /sys/devices/system/cpu/intel_pstate/no_turbo ;;
   off) echo 1 > /sys/devices/system/cpu/intel_pstate/no_turbo ;;
-  *) echo "USAGE: $0 <on|off>" ; exit 111
+  *) usage
 esac
-- 
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