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#This class can manipulate the CPU behavior through "cpufreq".
class Knj::Cpufreq
#Data that is used to identify the CPU controlled by this object.
attr_reader :data
#Useually called through "Knj::Cpufreq.list".
def initialize(data)
@data = data
@allowed_govs = ["performance", "ondemand", "powersafe", "conservative"]
end
#Returns a list of CPUs.
#===Examples
# list = Knj::Cpufreq.list
# list.each do |cpufreq|
# cpufreq.governor = "performance"
# end
def self.list
ret = []
cont = File.read("/proc/cpuinfo")
matches = cont.scan(/processor\s*:[\s\S]+?\n\n/)
raise "Could not detect CPUs" if !matches or matches.empty?
matches.each do |cpucont|
cpu_features = {}
features = cpucont.scan(/(.+)\s*:\s*(.+)\s*/)
features.each do |data|
cpu_features[data[0].strip] = data[1].strip
end
ret << Knj::Cpufreq.new(cpu_features)
end
return ret
end
#Sets the governor.
#===Examples
# cpufreq.governor = "performance"
def governor=(newgov)
raise "Governor not found." if @allowed_govs.index(newgov) == nil
cmd = "cpufreq-set --cpu #{@data["processor"]} --governor #{newgov}"
res = Knj::Os::shellcmd(cmd)
if res.index("Error setting new values") != nil
raise res.strip
end
end
end
Version data entries
79 entries across 79 versions & 1 rubygems