Comments (4)
huoxiangdong
commented on June 14, 2024
执行上下文 COE
- 该状态包括CPU状态（寄存器等）、MMU状态（页面映射）、许可状态（UID、GID）和各种“通信状态”（打开文件、信号处理程序等）
- COE的唯一性（Linux）称为“任务”
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huoxiangdong
commented on June 14, 2024
- 切换线程只是换一组寄存器，'切换内核态可是要复制整条堆栈的'
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huoxiangdong
commented on June 14, 2024
调度
- 调度器，能让多个任务（应用程序）微观上或宏观上同时执行。
- 所谓微观上同时，指多CPU系统中，多个任务被分配给多个CPU，多个CPU同时进行
取指译码执行等操作 - 所谓宏观上同时，指多个任务被分配给单个CPU，
单个CPU不能同时执行多个指令，但能在任务间快速轮换，使得看起来像同时执行
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huoxiangdong
commented on June 14, 2024
内核级调度
- 通过操作系统内核实现的调度，就是内核级调度
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