class Barnes::Instruments::Stopwatch

Public Class Methods

new(timepiece = Timepiece) click to toggle source
# File lib/barnes/instruments/stopwatch.rb, line 27
def initialize(timepiece = Timepiece)
  @timepiece = timepiece
  @has_cpu_time = timepiece.respond_to?(:cpu)
end

Public Instance Methods

instrument!(state, counters, gauges) click to toggle source
# File lib/barnes/instruments/stopwatch.rb, line 36
def instrument!(state, counters, gauges)
  last = state[:stopwatch]
  wall_elapsed = @timepiece.wall - last[:wall]
  counters[:'Time.wall'] = wall_elapsed

  if @has_cpu_time
    cpu_elapsed = @timepiece.cpu - last[:cpu]
    idle_elapsed = wall_elapsed - cpu_elapsed

    counters[:'Time.cpu']      = cpu_elapsed
    counters[:'Time.idle']     = idle_elapsed

    if wall_elapsed == 0
      counters[:'Time.pct.cpu']  = 0
      counters[:'Time.pct.idle'] = 0
    else
      counters[:'Time.pct.cpu']  = 100.0 * cpu_elapsed  / wall_elapsed
      counters[:'Time.pct.idle'] = 100.0 * idle_elapsed / wall_elapsed
    end
  end

  state[:stopwatch] = current
end
start!(state) click to toggle source
# File lib/barnes/instruments/stopwatch.rb, line 32
def start!(state)
  state[:stopwatch] = current
end

Private Instance Methods

current() click to toggle source
# File lib/barnes/instruments/stopwatch.rb, line 60
        def current
  state = {
    :wall => @timepiece.wall,
  }
  state[:cpu]  = @timepiece.cpu if @has_cpu_time
  state
end