Class: TimeBandits::TimeConsumers::GarbageCollection

Inherits:
Object
  • Object
show all
Defined in:
lib/time_bandits/time_consumers/garbage_collection.rb

Constant Summary collapse

GCFORMAT = 
"GC: %.3f(%d) | HP: %d(%d,%d,%d,%d)"
@@heap_dumps_enabled = 
false

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.heap_dumps_enabled=(v) ⇒ Object 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 6

def self.heap_dumps_enabled=(v)
  @@heap_dumps_enabled = v
end

.instance ⇒ Object 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 16

def self.instance
  @instance ||= new
end

Instance Method Details

#_get_allocated_objects ⇒ Object 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 40

def _get_allocated_objects; GC.stat(:total_allocated_objects); end

#_get_allocated_size ⇒ Object

this will wrap around :malloc_increase_bytes_limit so is not really correct



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 46

def _get_allocated_size; GC.total_malloced_bytes; end

#_get_collections ⇒ Object 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 38

def _get_collections; GC.count; end

#_get_gc_time ⇒ Object 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 31

def _get_gc_time; GC.time; end

#_get_heap_slots ⇒ Object 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 50

def _get_heap_slots; GC.heap_slots; end

#allocated_objects ⇒ Object 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 82

def allocated_objects
  _get_allocated_objects - @allocated_objects
end

#allocated_size ⇒ Object 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 86

def allocated_size
  new_size = _get_allocated_size
  old_size = @allocated_size
  new_size <= old_size ? new_size : new_size - old_size
end

#collections ⇒ Object 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 78

def collections
  _get_collections - @collections
end

#consumed ⇒ Object Also known as: current_runtime 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 69

def consumed
  0.0
end

#consumed_gc_time ⇒ Object

ms



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 74

def consumed_gc_time # ms
  (_get_gc_time - @consumed).to_f / 1000
end

#enable_stats ⇒ Object 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 20

def enable_stats
  return unless GC.respond_to? :enable_stats
  GC.enable_stats
  if defined?(PhusionPassenger)
    PhusionPassenger.on_event(:starting_worker_process) do |forked|
      GC.enable_stats if forked
    end
  end
end

#heap_growth ⇒ Object 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 92

def heap_growth
  _get_heap_slots - @heap_slots
end

#live_data_set_size ⇒ Object 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 56

def live_data_set_size; GC.heap_slots_live_after_last_gc; end

#metrics ⇒ Object 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 107

def metrics
  {
    :gc_time => consumed_gc_time,
    :gc_calls => collections,
    :heap_growth => heap_growth,
    :heap_size => _get_heap_slots,
    :allocated_objects => allocated_objects,
    :allocated_bytes => allocated_size,
    :live_data_set_size => live_data_set_size
  }
end

#reset ⇒ Object 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 61

def reset
  @consumed = _get_gc_time
  @collections = _get_collections
  @allocated_objects = _get_allocated_objects
  @allocated_size = _get_allocated_size
  @heap_slots = _get_heap_slots
end

#runtime ⇒ Object 



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# File 'lib/time_bandits/time_consumers/garbage_collection.rb', line 98

def runtime
  heap_slots = _get_heap_slots
  heap_growth = self.heap_growth
  allocated_objects = self.allocated_objects
  allocated_size = self.allocated_size
  GCHacks.heap_dump if heap_growth > 0 && @@heap_dumps_enabled && defined?(GCHacks)
  GCFORMAT % [consumed_gc_time, collections, heap_growth, heap_slots, allocated_objects, allocated_size, live_data_set_size]
end