class NewRelic::Agent::VM::MonotonicGCProfiler
Public Class Methods
new()
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# File lib/new_relic/agent/vm/monotonic_gc_profiler.rb, line 17 def initialize @total_time_s = 0 @lock = Mutex.new end
Public Instance Methods
total_time_s()
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# File lib/new_relic/agent/vm/monotonic_gc_profiler.rb, line 22 def total_time_s if NewRelic::LanguageSupport.gc_profiler_enabled? # There's a race here if the next two lines don't execute as an atomic # unit - we may end up double-counting some GC time in that scenario. # Locking around them guarantees atomicity of the read/increment/reset # sequence. @lock.synchronize do # The Ruby 1.9.x docs claim that GC::Profiler.total_time returns # a value in milliseconds. They are incorrect - both 1.9.x and 2.x # return values in seconds. @total_time_s += ::GC::Profiler.total_time ::GC::Profiler.clear end else NewRelic::Agent.logger.log_once(:warn, :gc_profiler_disabled, 'Tried to measure GC time, but GC::Profiler was not enabled.') end @total_time_s end