Module: OneApm::Agent::BusyCalculator

Extended by:
BusyCalculator
Included in:
BusyCalculator
Defined in:
lib/one_apm/agent/busy_calculator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#accumulator ⇒ Object (readonly)

Returns the value of attribute accumulator.



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# File 'lib/one_apm/agent/busy_calculator.rb', line 11

def accumulator
  @accumulator
end

#harvest_start ⇒ Object (readonly)

Returns the value of attribute harvest_start.



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# File 'lib/one_apm/agent/busy_calculator.rb', line 11

def harvest_start
  @harvest_start
end

Instance Method Details

#busy_count ⇒ Object 



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# File 'lib/one_apm/agent/busy_calculator.rb', line 41

def busy_count
  @entrypoint_stack.size
end

#dispatcher_finish(end_time = nil) ⇒ Object 



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# File 'lib/one_apm/agent/busy_calculator.rb', line 23

def dispatcher_finish(end_time = nil)
  state = TransactionState.tl_get
  return unless state.busy_entries

  end_time ||= time_now
  callers = state.busy_entries -= 1

  return if callers > 0

  @lock.synchronize do
    if @entrypoint_stack.empty?
      OneApm::Manager.logger.warn("Stack underflow tracking dispatcher entry and exit!\n  #{caller.join("  \n")}")
    else
      @accumulator += (end_time - @entrypoint_stack.pop).to_f
    end
  end
end

#dispatcher_start(time) ⇒ Object 



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# File 'lib/one_apm/agent/busy_calculator.rb', line 13

def dispatcher_start(time)
  state = TransactionState.tl_get
  state.busy_entries ||= 0
  callers = state.busy_entries += 1
  return if callers > 1
  @lock.synchronize do
    @entrypoint_stack.push time
  end
end

#harvest_busy ⇒ Object 



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# File 'lib/one_apm/agent/busy_calculator.rb', line 53

def harvest_busy
  busy = 0
  t0 = time_now
  @lock.synchronize do
    busy = accumulator
    @accumulator = 0

    @entrypoint_stack.size.times do |frame|
      busy += (t0 - @entrypoint_stack[frame]).to_f
      @entrypoint_stack[frame] = t0
    end

  end

  busy = 0.0 if busy < 0.0

  time_window = (t0 - harvest_start).to_f
  time_window = 1.0 if time_window == 0.0

  busy = busy / time_window

  if OneApm::Manager.config[:report_instance_busy]
    OneApm::Manager.record_metric('Instance/Busy', busy)
  end
  @harvest_start = t0
end

#reset ⇒ Object 



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# File 'lib/one_apm/agent/busy_calculator.rb', line 45

def reset
  @entrypoint_stack = []
  TransactionState.tl_get.busy_entries = 0
  @lock ||= Mutex.new
  @accumulator = 0
  @harvest_start = time_now
end