class OneApm::Collector::Samplers::CpuSampler
Attributes
last_time[R]
Public Class Methods
new()
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# File lib/one_apm/collector/samplers/cpu_sampler.rb, line 13 def initialize @processor_count = OneApm::Support::SystemInfo.num_logical_processors poll end
supported_on_this_platform?()
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# File lib/one_apm/collector/samplers/cpu_sampler.rb, line 49 def self.supported_on_this_platform? # Process.times on JRuby < 1.7.0 reports wall clock elapsed time, not actual cpu time used defined?(JRuby) ? (JRUBY_VERSION >= '1.7.0') : true end
Public Instance Methods
poll()
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# File lib/one_apm/collector/samplers/cpu_sampler.rb, line 22 def poll now = Time.now @poller.pid = Process.pid if @poller 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 systemtime = t.stime - @last_stime if systemtime >= 0 OneApm::Manager.record_metric("CPU/System Time", systemtime) OneApm::Manager.record_metric("CPU/System/Utilization", systemtime / (elapsed * @processor_count)) end if usertime >= 0 cpu_utilization = @poller ? @poller.cpu_utilization : (usertime / (elapsed * @processor_count)) OneApm::Manager.record_metric("CPU/User Time", usertime) OneApm::Manager.record_metric("CPU/User/Utilization", cpu_utilization) end end @last_utime = t.utime @last_stime = t.stime @last_time = now end
set_poller(poller)
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# File lib/one_apm/collector/samplers/cpu_sampler.rb, line 18 def set_poller poller @poller = poller end