Module: OneApm::Collector::StatsEngine::GCProfiler

Defined in:
lib/one_apm/collector/stats_engine/gc_profiler.rb

Defined Under Namespace

Classes: CoreGCProfiler, GCSnapshot, RailsBenchProfiler

Constant Summary collapse

OA_GC_ROLLUP = 
'GC/Transaction/all'.freeze
OA_GC_OTHER = 
'GC/Transaction/allOther'.freeze
OA_GC_WEB = 
'GC/Transaction/allWeb'.freeze

Class Method Summary collapse

Class Method Details

.gc_metric_name ⇒ Object 



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# File 'lib/one_apm/collector/stats_engine/gc_profiler.rb', line 57

def self.gc_metric_name
  if OneApm::Transaction.recording_web_transaction?
    OA_GC_WEB
  else
    OA_GC_OTHER
  end
end

.init ⇒ Object 



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# File 'lib/one_apm/collector/stats_engine/gc_profiler.rb', line 9

def self.init
  return @profiler if @initialized
  @profiler = if RailsBenchProfiler.enabled?
    RailsBenchProfiler.new
  elsif CoreGCProfiler.enabled?
    CoreGCProfiler.new
  end
  @initialized = true
  @profiler
end

.record_delta(start_snapshot, end_snapshot) ⇒ Object 



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# File 'lib/one_apm/collector/stats_engine/gc_profiler.rb', line 34

def self.record_delta(start_snapshot, end_snapshot)
  if @profiler && start_snapshot && end_snapshot
    elapsed_gc_time_s = end_snapshot.gc_time_s - start_snapshot.gc_time_s
    num_calls         = end_snapshot.gc_call_count - start_snapshot.gc_call_count
    record_gc_metric(num_calls, elapsed_gc_time_s)

    @profiler.reset
    elapsed_gc_time_s
  end
end

.record_gc_metric(call_count, elapsed) ⇒ Object 



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# File 'lib/one_apm/collector/stats_engine/gc_profiler.rb', line 45

def self.record_gc_metric(call_count, elapsed)
  OneApm::Manager.agent.stats_engine.tl_record_scoped_and_unscoped_metrics(gc_metric_name, OA_GC_ROLLUP) do |stats|
    stats.call_count           += call_count
    stats.total_call_time      += elapsed
    stats.total_exclusive_time += elapsed
  end
end

.reset ⇒ Object 



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# File 'lib/one_apm/collector/stats_engine/gc_profiler.rb', line 20

def self.reset
  @profiler    = nil
  @initialized = nil
end

.take_snapshot ⇒ Object 



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# File 'lib/one_apm/collector/stats_engine/gc_profiler.rb', line 25

def self.take_snapshot
  init
  if @profiler
    GCSnapshot.new(@profiler.call_time_s, @profiler.call_count)
  else
    nil
  end
end