From 99f06a2e3c2b6e040895ac7fe5963ae7ba8298d5 Mon Sep 17 00:00:00 2001
From: David Runge <dave@sleepmap.de>
Date: Sun, 9 Dec 2018 13:38:50 +0100
Subject: bin/realtime-suggestions: Guarding against non-existing cpufreq dir
 in /sys, when running check_cpu_governor(). Mentioning default value in
 check_max_user_watches().

---
 bin/realtime-suggestions | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

(limited to 'bin')

diff --git a/bin/realtime-suggestions b/bin/realtime-suggestions
index c5e7355..9235651 100755
--- a/bin/realtime-suggestions
+++ b/bin/realtime-suggestions
@@ -97,23 +97,28 @@ check_max_user_watches() {
   local minimum=524288
   local proc_file="/proc/sys/fs/inotify/max_user_watches"
   if [ "$(cat "$proc_file")" -lt $minimum ]; then
-    echo "$change Consider increasing 'fs.inotify.max_user_watches>$minimum' - the maximum amount of files inotify can watch $sysctl_ref"
+    echo "$change Consider increasing 'fs.inotify.max_user_watches>$minimum' (default) - the maximum amount of files inotify can watch $sysctl_ref."
   fi
 }
 
 check_cpu_governor() {
+  local governor_dir="/sys/devices/system/cpu/cpufreq/"
   local cpupower_ref="(see \`man cpupower\` for reference)"
   local governor=""
   local policy_no=""
   local cpu_no=""
-  for governor_file in /sys/devices/system/cpu/cpufreq/policy*/scaling_governor; do
-    governor="$(cat "$governor_file")"
-    policy_no="$(echo "$governor_file"| cut -d'/' -f7)"
-    cpu_no="${policy_no//policy}"
-    if [[ "$governor" != "performance" ]]; then
-      echo "$change CPU $cpu_no has governor $governor set. Set it to 'performance' $cpupower_ref."
-    fi
-  done
+  if [ -d "${governor_dir}" ]; then
+    for governor_file in /sys/devices/system/cpu/cpufreq/policy*/scaling_governor; do
+      governor="$(cat "$governor_file")"
+      policy_no="$(echo "$governor_file"| cut -d'/' -f7)"
+      cpu_no="${policy_no//policy}"
+      if [[ "$governor" != "performance" ]]; then
+        echo "$change CPU $cpu_no has governor $governor set. Set it to 'performance' $cpupower_ref."
+      fi
+    done
+  else
+    echo "$warning Unable to detect any CPU governor on your machine. ${governor_dir} does not exist!"
+  fi
 }
 
 check_config_high_res_timers() {
-- 
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