工作流中的所有功能如何同时并行运行？

Question

当在并行工作流程中运行许多功能时，只能同时运行5个功能。

例如，运行此脚本：

function func1 { echo "I'm func1"; sleep(5); echo "func1 finished"; }
function func2 { echo "I'm func2"; sleep(5); echo "func2 finished"; }
function func3 { echo "I'm func3"; sleep(5); echo "func3 finished"; }
function func4 { echo "I'm func4"; sleep(5); echo "func4 finished"; }
function func5 { echo "I'm func5"; sleep(5); echo "func5 finished"; }
function func6 { echo "I'm func6"; sleep(5); echo "func6 finished"; }
function func7 { echo "I'm func7"; sleep(5); echo "func7 finished"; }
function func8 { echo "I'm func8"; sleep(5); echo "func8 finished"; }
function func9 { echo "I'm func9"; sleep(5); echo "func9 finished"; }
function func10 { echo "I'm func10"; sleep(5); echo "func10 finished"; }

workflow run { parallel { func1; func2; func3; func4; func5; func6; func7; func8; func9; func10; } }; run;

生成此输出：

I'm func1
I'm func2
I'm func5
I'm func4
I'm func3
func2 finished
func1 finished
func4 finished
func5 finished
func3 finished
I'm func7
I'm func8
I'm func9
I'm func6
I'm func10
func7 finished
func8 finished
func6 finished
func9 finished
func10 finished

如何增加5功能限制？