eth_is_affinitized?

in itchef/cookbooks/fb_helpers/libraries/node_methods.rb [925:968]

• 35 lines of code
• 7 McCabe index (conditional complexity)

    def eth_is_affinitized?
      
      
      r = /^(eth(.*[Rr]x|\d+-\d+)|mlx4-\d+@.*|mlx5_comp\d+@.*)/

      irqs = node['interrupts']['irq'].select do |_irq, v|
        v['device'] && r.match?(v['device']) &&
          v['type'] && v['type'].end_with?('MSI')
      end
      if irqs.empty?
        Chef::Log.debug(
          'fb_helpers: no eth MSI vectors found, this host does ' +
          'not need affinity',
        )
        return true
      end
      default_affinity = node['interrupts']['smp_affinity_by_cpu']
      
      
      
      
      
      affinitized_irqs = irqs.reject do |_irq, v|
        my_affinity = v['smp_affinity_by_cpu']
        my_affinity == default_affinity ||
          my_affinity == my_affinity.select do |_cpu, is_affinitized|
            is_affinitized
          end
      end
      if irqs == affinitized_irqs
        Chef::Log.info(
          "fb_helpers: all #{irqs.size} MSI eth rx IRQs are " +
          'affinitized to CPUs.',
        )
        return true
      else
        Chef::Log.warn(
          "fb_helpers: only #{affinitized_irqs.size}/#{irqs.size} " +
          'MSI eth rx IRQs are affinitized to CPUs',
        )
        return false
      end
    end