Method: Concurrent.processor_count

Defined in:
lib/concurrent-ruby/concurrent/utility/processor_counter.rb

.processor_count ⇒ Integer

Number of processors seen by the OS and used for process scheduling. For performance reasons the calculated value will be memoized on the first call.

When running under JRuby the Java runtime call ‘java.lang.Runtime.getRuntime.availableProcessors` will be used. According to the Java documentation this “value may change during a particular invocation of the virtual machine… [applications] should therefore occasionally poll this property.” We still memoize this value once under JRuby.

Otherwise Ruby’s Etc.nprocessors will be used.

Returns:

  • (Integer) —

    number of processors seen by the OS or Java runtime

See Also:



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# File 'lib/concurrent-ruby/concurrent/utility/processor_counter.rb', line 160

def self.processor_count
  processor_counter.processor_count
end