Class: NewRelic::Agent::VM::MriVM

Inherits:
Object
  • Object
show all
Defined in:
lib/new_relic/agent/vm/mri_vm.rb

Instance Method Summary collapse

Instance Method Details

#derive_from_gc_stats(keys, stat) ⇒ Object 



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# File 'lib/new_relic/agent/vm/mri_vm.rb', line 43

def derive_from_gc_stats(keys, stat)
  Array(keys).each do |key|
    value = stat[key]
    return value if value
  end
  nil
end

#gather_constant_cache_invalidations ⇒ Object 



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# File 'lib/new_relic/agent/vm/mri_vm.rb', line 71

def gather_constant_cache_invalidations
  RubyVM.stat[RUBY_VERSION >= '3.2.0' ? :constant_cache_invalidations : :global_constant_state]
end

#gather_constant_cache_misses ⇒ Object 



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# File 'lib/new_relic/agent/vm/mri_vm.rb', line 75

def gather_constant_cache_misses
  RubyVM.stat[:constant_cache_misses]
end

#gather_derived_stats(snap) ⇒ Object 



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# File 'lib/new_relic/agent/vm/mri_vm.rb', line 34

def gather_derived_stats(snap)
  stat = GC.stat
  snap.total_allocated_object = derive_from_gc_stats(%i[total_allocated_objects total_allocated_object], stat)
  snap.major_gc_count = derive_from_gc_stats(:major_gc_count, stat)
  snap.minor_gc_count = derive_from_gc_stats(:minor_gc_count, stat)
  snap.heap_live = derive_from_gc_stats(%i[heap_live_slots heap_live_slot heap_live_num], stat)
  snap.heap_free = derive_from_gc_stats(%i[heap_free_slots heap_free_slot heap_free_num], stat)
end

#gather_gc_runs(snap) ⇒ Object 



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# File 'lib/new_relic/agent/vm/mri_vm.rb', line 30

def gather_gc_runs(snap)
  snap.gc_runs = GC.count
end

#gather_gc_stats(snap) ⇒ Object 



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# File 'lib/new_relic/agent/vm/mri_vm.rb', line 25

def gather_gc_stats(snap)
  gather_gc_runs(snap) if supports?(:gc_runs)
  gather_derived_stats(snap) if GC.respond_to?(:stat)
end

#gather_gc_time(snap) ⇒ Object 



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# File 'lib/new_relic/agent/vm/mri_vm.rb', line 51

def gather_gc_time(snap)
  return unless supports?(:gc_total_time)

  snap.gc_total_time = NewRelic::Agent.instance.monotonic_gc_profiler.total_time_s
end

#gather_ruby_vm_stats(snap) ⇒ Object 



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# File 'lib/new_relic/agent/vm/mri_vm.rb', line 57

def gather_ruby_vm_stats(snap)
  if supports?(:method_cache_invalidations)
    snap.method_cache_invalidations = RubyVM.stat[:global_method_state]
  end

  if supports?(:constant_cache_invalidations)
    snap.constant_cache_invalidations = gather_constant_cache_invalidations
  end

  if supports?(:constant_cache_misses)
    snap.constant_cache_misses = gather_constant_cache_misses
  end
end

#gather_stats(snap) ⇒ Object 



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# File 'lib/new_relic/agent/vm/mri_vm.rb', line 18

def gather_stats(snap)
  gather_gc_stats(snap)
  gather_ruby_vm_stats(snap)
  gather_thread_stats(snap)
  gather_gc_time(snap)
end

#gather_thread_stats(snap) ⇒ Object 



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# File 'lib/new_relic/agent/vm/mri_vm.rb', line 79

def gather_thread_stats(snap)
  snap.thread_count = Thread.list.size
end

#snapshot ⇒ Object 



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# File 'lib/new_relic/agent/vm/mri_vm.rb', line 12

def snapshot
  snap = Snapshot.new
  gather_stats(snap)
  snap
end

#supports?(key) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/new_relic/agent/vm/mri_vm.rb', line 83

def supports?(key)
  case key
  when :gc_runs,
    :total_allocated_object,
    :heap_live,
    :heap_free,
    :thread_count,
    :major_gc_count,
    :minor_gc_count,
    :constant_cache_invalidations
    true
  when :gc_total_time
    NewRelic::LanguageSupport.gc_profiler_enabled?
  when :method_cache_invalidations
    RUBY_VERSION < '3.0.0'
  when :constant_cache_misses
    RUBY_VERSION >= '3.2.0'
  else
    false
  end
end