如何在运行时在Haskell中查找内核数量 [英] How to find the number of cores at runtime in Haskell

问题描述

Haskell有一种方法可以确定运行时机器上CPU核的数量吗？ 是的，那里有是这样一种方法。来自Real World Haskell的代码： http://book.realworldhaskell.org /read/concurrent-and-multicore-programming.html

  import GHC.Conc（numCapabilities）
 
 main = putStrLn $核心数量：++ show numCapabilities 
  

Does Haskell have a method for determining the number of CPU cores present on a machine at runtime?

解决方案

Yes, there is such a method. Code from "Real World Haskell": http://book.realworldhaskell.org/read/concurrent-and-multicore-programming.html

import GHC.Conc (numCapabilities)

main = putStrLn $ "number of cores: " ++ show numCapabilities

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