+sbwt none
将CPU忙等待关闭将有助于降低系统显示的CPU使用率，因为开启了忙等待的BEAM，CPU负载并不代表真实的工作情况；
+K true
开启epoll IO模型
+swt low
Sets scheduler wakeup threshold. Defaults to medium. The threshold determines when to wake up sleeping schedulers when more work than can be handled by currently awake schedulers exists. A low threshold causes earlier wakeups, and a high threshold causes later wakeups. Early wakeups distribute work over multiple schedulers faster, but work does more easily bounce between schedulers.
-- 过早唤醒调度器可能造成更多的上下文切换
+sub true
公平调度，平均分配CPU任务
#+S 3:3
#+SP 75:50
CPU 忙等待参数调试