系统技术非业余研究

来自github上的otp源码提交消息:
Erlang R14B 新增加参数 +swt very_low|low|medium|high|very_high
Set scheduler wakeup threshold. Default is medium

The threshold determines when to wake up sleeping schedulers when more work than can be handled by currently awake schedulers exist. A low threshold will cause earlier wakeups, and a high threshold will cause later wakeups. Early wakeups will distribute work over multiple schedulers faster, but work will more easily bounce between schedulers.

这样减少无必要的进程调度，避免cache被污染！