Class: NewRelic::Agent::Samplers::CpuSampler
Instance Attribute Summary collapse
#id, #stats_engine
Class Method Summary
collapse
Instance Method Summary
collapse
inherited, sampler_classes, use_harvest_sampler?
Constructor Details
Returns a new instance of CpuSampler.
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# File 'lib/new_relic/agent/samplers/cpu_sampler.rb', line 12
def initialize
super :cpu
poll
end
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Instance Attribute Details
#last_time ⇒ Object
Returns the value of attribute last_time.
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# File 'lib/new_relic/agent/samplers/cpu_sampler.rb', line 11
def last_time
@last_time
end
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Class Method Details
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# File 'lib/new_relic/agent/samplers/cpu_sampler.rb', line 33
def self.supported_on_this_platform?
not defined?(JRuby)
end
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Instance Method Details
#poll ⇒ Object
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# File 'lib/new_relic/agent/samplers/cpu_sampler.rb', line 39
def poll
now = Time.now
t = Process.times
if @last_time
elapsed = now - @last_time
return if elapsed < 1 num_processors = NewRelic::Control.instance.local_env.processors || 1
usertime = t.utime - @last_utime
systemtime = t.stime - @last_stime
record_systemtime(systemtime) if systemtime >= 0
record_usertime(usertime) if usertime >= 0
record_user_util(usertime / (elapsed * num_processors))
record_system_util(systemtime / (elapsed * num_processors))
end
@last_utime = t.utime
@last_stime = t.stime
@last_time = now
end
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#record_system_util(value) ⇒ Object
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# File 'lib/new_relic/agent/samplers/cpu_sampler.rb', line 21
def record_system_util(value)
NewRelic::Agent.record_metric("CPU/System/Utilization", value)
end
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#record_systemtime(value) ⇒ Object
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# File 'lib/new_relic/agent/samplers/cpu_sampler.rb', line 29
def record_systemtime(value)
NewRelic::Agent.record_metric("CPU/System Time", value)
end
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#record_user_util(value) ⇒ Object
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# File 'lib/new_relic/agent/samplers/cpu_sampler.rb', line 17
def record_user_util(value)
NewRelic::Agent.record_metric("CPU/User/Utilization", value)
end
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#record_usertime(value) ⇒ Object
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# File 'lib/new_relic/agent/samplers/cpu_sampler.rb', line 25
def record_usertime(value)
NewRelic::Agent.record_metric("CPU/User Time", value)
end
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