Class: Couchbase::Utils::HdrHistogramC

Inherits:
Object
  • Object
show all
Defined in:
ext/rcb_hdr_histogram.cxx

Instance Method Summary collapse

Constructor Details

#initialize(lowest_discernible_value, highest_trackable_value, significant_figures) ⇒ Object 



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# File 'ext/rcb_hdr_histogram.cxx', line 97

VALUE
cb_HdrHistogramC_initialize(VALUE self,
                            VALUE lowest_discernible_value,
                            VALUE highest_trackable_value,
                            VALUE significant_figures)
{
  Check_Type(lowest_discernible_value, T_FIXNUM);
  Check_Type(highest_trackable_value, T_FIXNUM);
  Check_Type(significant_figures, T_FIXNUM);

  std::int64_t lowest = NUM2LL(lowest_discernible_value);
  std::int64_t highest = NUM2LL(highest_trackable_value);
  int sigfigs = NUM2INT(significant_figures);

  cb_hdr_histogram_data* hdr_histogram;
  TypedData_Get_Struct(self, cb_hdr_histogram_data, &cb_hdr_histogram_type, hdr_histogram);

  int res;
  {
    const std::unique_lock lock(hdr_histogram->mutex);
    res = hdr_init(lowest, highest, sigfigs, &hdr_histogram->histogram);
  }
  if (res != 0) {
    rb_raise(exc_couchbase_error(), "failed to initialize HDR histogram");
    return self;
  }

  return self;
}

Instance Method Details

#bin_count ⇒ Object 



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# File 'ext/rcb_hdr_histogram.cxx', line 191

VALUE
cb_HdrHistogramC_bin_count(VALUE self)
{
  cb_hdr_histogram_data* hdr_histogram;
  TypedData_Get_Struct(self, cb_hdr_histogram_data, &cb_hdr_histogram_type, hdr_histogram);

  std::int32_t bin_count;
  {
    const std::unique_lock lock(hdr_histogram->mutex);
    bin_count = hdr_histogram->histogram->bucket_count;
  }
  return LONG2NUM(bin_count);
}

#close ⇒ Object 



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# File 'ext/rcb_hdr_histogram.cxx', line 127

VALUE
cb_HdrHistogramC_close(VALUE self)
{
  cb_hdr_histogram_data* hdr_histogram;
  TypedData_Get_Struct(self, cb_hdr_histogram_data, &cb_hdr_histogram_type, hdr_histogram);
  {
    const std::unique_lock lock(hdr_histogram->mutex);
    cb_hdr_histogram_close(hdr_histogram);
  }
  return Qnil;
}

#get_percentiles_and_reset(percentiles) ⇒ Object 



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# File 'ext/rcb_hdr_histogram.cxx', line 156

VALUE
cb_HdrHistogramC_get_percentiles_and_reset(VALUE self, VALUE percentiles)
{
  Check_Type(percentiles, T_ARRAY);

  cb_hdr_histogram_data* hdr_histogram;
  TypedData_Get_Struct(self, cb_hdr_histogram_data, &cb_hdr_histogram_type, hdr_histogram);

  std::vector<std::int64_t> percentile_values{};
  std::int64_t total_count;
  {
    const std::unique_lock lock(hdr_histogram->mutex);
    total_count = hdr_histogram->histogram->total_count;
    for (std::size_t i = 0; i < static_cast<std::size_t>(RARRAY_LEN(percentiles)); ++i) {
      VALUE entry = rb_ary_entry(percentiles, static_cast<long>(i));
      Check_Type(entry, T_FLOAT);
      double perc = NUM2DBL(entry);
      std::int64_t value_at_perc = hdr_value_at_percentile(hdr_histogram->histogram, perc);
      percentile_values.push_back(value_at_perc);
    }
    hdr_reset(hdr_histogram->histogram);
  }

  static const VALUE sym_total_count = rb_id2sym(rb_intern("total_count"));
  static const VALUE sym_percentiles = rb_id2sym(rb_intern("percentiles"));
  VALUE res = rb_hash_new();
  rb_hash_aset(res, sym_total_count, LL2NUM(total_count));
  VALUE perc_array = rb_ary_new_capa(static_cast<long>(percentile_values.size()));
  for (const auto& val : percentile_values) {
    rb_ary_push(perc_array, LL2NUM(val));
  }
  rb_hash_aset(res, sym_percentiles, perc_array);
  return res;
}

#record_value(value) ⇒ Object 



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# File 'ext/rcb_hdr_histogram.cxx', line 139

VALUE
cb_HdrHistogramC_record_value(VALUE self, VALUE value)
{
  Check_Type(value, T_FIXNUM);

  std::int64_t val = NUM2LL(value);

  cb_hdr_histogram_data* hdr_histogram;
  TypedData_Get_Struct(self, cb_hdr_histogram_data, &cb_hdr_histogram_type, hdr_histogram);

  {
    const std::shared_lock lock(hdr_histogram->mutex);
    hdr_record_value_atomic(hdr_histogram->histogram, val);
  }
  return Qnil;
}