2015年10月5日

Operating System: Three Easy Pieces --- Mechanism: Limited Direct Execution (Note)

摘要： In order to virtualize the CPU, the operating system needs to somehow share the physicalCPU among many jobs running seemingly at the same time. The ba... 阅读全文

posted @ 2015-10-05 12:35 Persistence 阅读(251) 评论(0) 推荐(0)

Operating System: Three Easy Pieces --- API (Note)

摘要： Aside: RTFM --- Read The Man PagesMany times in this book, when referring to a particular system call or library call, we willtell you to read the man... 阅读全文

posted @ 2015-10-05 12:14 Persistence 阅读(302) 评论(0) 推荐(0)

Modern Operating System --- Chap 5.5.2 Clock Software

摘要： All the clock hardware does is to generate interrupts at known intervals. Everythingelse involving time must be done by the software, the clock driver... 阅读全文

posted @ 2015-10-05 07:43 Persistence 阅读(111) 评论(0) 推荐(0)

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