From 3643c94ea91b3e029140e6c77274c049619f8cf5 Mon Sep 17 00:00:00 2001
From: Peter Palfrader <peter@palfrader.org>
Date: Fri, 21 Jul 2006 14:22:11 +0000
Subject: Add cpufreq thing

git-svn-id: svn+ssh://asteria.noreply.org/svn/weaselutils/trunk@153 bc3d92e2-beff-0310-a7cd-cc87d7ac0ede
---
 munin/cpufreq | 69 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100755 munin/cpufreq

diff --git a/munin/cpufreq b/munin/cpufreq
new file mode 100755
index 0000000..316ceac
--- /dev/null
+++ b/munin/cpufreq
@@ -0,0 +1,69 @@
+#!/usr/bin/ruby
+
+# Copyright (c) 2006 Peter Palfrader
+#
+#%# family=auto
+#%# capabilities=autoconf
+
+def bail_out(m)
+	STDERR.puts "#{$0}: #{m}"
+	exit 1
+end
+
+def autoconf
+	if FileTest.directory? "/sys/devices/system/cpu/cpu0/cpufreq/"
+		puts "yes"
+	else
+		puts "no (no /sys/devices/system/cpu/cpu0/cpufreq/)"
+	end
+end
+
+def findmasters
+	cpudirs = Dir.glob("/sys/devices/system/cpu/cpu*/").map{ |b| File.basename b }
+	cpus = cpudirs.map{ |d| /^cpu([0-9]+)$/.match(d)[1].to_i }.sort{|a,b| a<=>b }
+	masters = []
+	cpus.each do |cpunum|
+		affected = IO.read("/sys/devices/system/cpu/cpu#{cpunum}/cpufreq/affected_cpus").split.map{|s| s.to_i}.sort{|a,b| a<=>b }
+		bail_out "huh?  /sys/devices/system/cpu/cpu#{cpunum}/cpufreq/affected_cpus says it does not affect #{cpunum}!?" unless affected.include? cpunum
+		h = {}
+		h['cpunum'] = affected[0]
+		h['fieldname'] = "cpu#{affected[0]}"
+		h['label'] = affected.map{|c| "cpu#{c}"}.join(", ")
+		masters.push(h)
+		affected.each{ |a| cpus.delete(a) }
+	end
+	masters
+end
+
+def config
+	puts 'graph_title CPU frequency'
+	puts 'graph_args --base 1000'
+	puts 'graph_vlabel Hz'
+	puts 'graph_category cpu'
+	puts 'graph_period second'
+	puts 'graph_info Shows the CPU frequency of all installed CPUs'
+	findmasters.each do |m|
+		puts "#{m['fieldname']}.label #{m['label']}"
+		puts "#{m['fieldname']}.info Hz"
+		puts "#{m['fieldname']}.type GAUGE"
+	end
+end
+
+def report
+	m = findmasters
+	sleep(5) # we are interested how it does without us poking it,
+	         # so maybe sleeping a bit will help
+	m.each do |m|
+		value = IO.read("/sys/devices/system/cpu/cpu#{m['cpunum']}/cpufreq/scaling_cur_freq").to_i
+		puts "#{m['fieldname']}.value #{value}"
+	end
+end
+
+case ARGV[0]
+	when "autoconf"
+		autoconf
+	when "config"
+		config
+	else
+		report
+end
-- 
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