class TingYun::Agent::Collector::CpuSampler

Attributes

last_time[R]

Public Class Methods

new() click to toggle source
# 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

Public Instance Methods

poll() click to toggle source
# 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) click to toggle source
# 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) click to toggle source
# 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) click to toggle source
# 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) click to toggle source
# 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