scala – 解释Akka线程池执行器配置参数

fork-join-executor {
        # Min number of threads to cap factor-based parallelism number to
        parallelism-min = 8

        # The parallelism factor is used to determine thread pool size using the
        # following formula: ceil(available processors * factor). Resulting size
        # is then bounded by the parallelism-min and parallelism-max values.
        parallelism-factor = 3.0

        # Max number of threads to cap factor-based parallelism number to
        parallelism-max = 64

        # Setting to "FIFO" to use queue like peeking mode which "poll" or "LIFO" to use stack
        # like peeking mode which "pop".
        task-peeking-mode = "FIFO"
      }

虽然我理解每个单词,但我不理解这里解释的完整语义.

>什么意味着ceil？ in ceil(可用处理器*因子)
>什么意味着基于因子的并行性？

有人可以用英语向我解释上面的配置意味着什么.通过阅读这里和那里的许多帖子,我有点理解,默认情况下,akka会设置一个threadPoolexecutor,为每个核心分配和线程.因此,如果您有2个核心处理器,那么最终会有4个线程.无论如何,你可以真正实现多少平行.在它之上它是并发的但不完全严格地讲并行.虽然这是另一个问题.

因此,如果有人可以根据处理器和核心解释上述配置,并且结果数量的线程包含2个机器示例(根据其处理器配置),这将是很好的.