class CpuStats

CPU stat collection and calculation

Constants

CLASSES

Attributes

later[R]

now[R]

Public Instance Methods

collect(sleep_time = 5) click to toggle source

# File lib/check_cpu_steal/cpu_stats.rb, line 18
def collect(sleep_time = 5)
  @now = stats(read_proc)
  sleep sleep_time
  @later = stats(read_proc)
  @now[:total] = @now.values.inject(:+)
  @later[:total] = @later.values.inject(:+)
end

read_proc(file = '/proc/stat') click to toggle source

# File lib/check_cpu_steal/cpu_stats.rb, line 26
def read_proc(file = '/proc/stat')
  File.foreach(file).first
end

stat_diff(stat_name) click to toggle source

# File lib/check_cpu_steal/cpu_stats.rb, line 37
def stat_diff(stat_name)
  @later[stat_name] - @now[stat_name]
end

stat_pct(stat_name) click to toggle source

# File lib/check_cpu_steal/cpu_stats.rb, line 41
def stat_pct(stat_name)
  stat_diff(stat_name) / stat_diff(:total)
end

stats(info) click to toggle source

# File lib/check_cpu_steal/cpu_stats.rb, line 30
def stats(info)
  stats = info.split(/\s+/)
  stats.shift
  stats.map!(&:to_f)
  Hash[CLASSES.zip(stats)]
end