Class: TingYun::Agent::Collector::CpuSampler

Inherits:
Sampler
  • Object
show all
Defined in:
lib/ting_yun/agent/collector/middle_ware_collector/cpu_sampler.rb

Instance Attribute Summary collapse

Attributes inherited from Sampler

#id

Instance Method Summary collapse

Methods inherited from Sampler

enabled?, inherited, name, named, sampler_classes, supported_on_this_platform?

Constructor Details

#initialize ⇒ CpuSampler

Returns a new instance of CpuSampler.



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# File 'lib/ting_yun/agent/collector/middle_ware_collector/cpu_sampler.rb', line 15

def initialize
  @last_time = nil
  @processor_count = TingYun::Support::SystemInfo.num_logical_processors
  if @processor_count.nil?
    TingYun::Agent.logger.warn("Failed to determine processor count, assuming 1")
    @processor_count = 1
  end
  poll
end

Instance Attribute Details

#last_time ⇒ Object (readonly)

Returns the value of attribute last_time.



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# File 'lib/ting_yun/agent/collector/middle_ware_collector/cpu_sampler.rb', line 11

def last_time
  @last_time
end

Instance Method Details

#poll ⇒ Object 



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# File 'lib/ting_yun/agent/collector/middle_ware_collector/cpu_sampler.rb', line 41

def poll
  now = Time.now
  t = Process.times
  if @last_time
    elapsed = now - @last_time
    return if elapsed < 1 # Causing some kind of math underflow

    usertime = t.utime - @last_utime

    if usertime >= 0
      record_usertime(usertime)
      record_user_util((usertime * 100) / (elapsed * @processor_count))
    end
  end
  @last_utime = t.utime
  @last_stime = t.stime
  @last_time = now
end

#record_system_util(value) ⇒ Object 



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# File 'lib/ting_yun/agent/collector/middle_ware_collector/cpu_sampler.rb', line 29

def record_system_util(value)
  TingYun::Agent.record_metric("CPU/System/Utilization", value)
end

#record_systemtime(value) ⇒ Object 



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# File 'lib/ting_yun/agent/collector/middle_ware_collector/cpu_sampler.rb', line 37

def record_systemtime(value)
  TingYun::Agent.record_metric("CPU/System Time", value)
end

#record_user_util(value) ⇒ Object 



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# File 'lib/ting_yun/agent/collector/middle_ware_collector/cpu_sampler.rb', line 25

def record_user_util(value)
  TingYun::Agent.record_metric("CPU/NULL/UserUtilization", value)
end

#record_usertime(value) ⇒ Object 



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# File 'lib/ting_yun/agent/collector/middle_ware_collector/cpu_sampler.rb', line 33

def record_usertime(value)
  TingYun::Agent.record_metric("CPU/NULL/UserTime", value)
end