Operating systems notes

Context Switching & the Dispatcher

How one CPU pauses one thread and resumes another, and what that costs. Every section is a drawn page beside a clear written explanation, about 13 minutes in all.

  • Chapter 10 of 37
  • About 13 minutes
  • 6 sections

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The first drawn page of Context Switching & the Dispatcher: What a context switch actually is
The chapter's first page: What a context switch actually is

In this chapter

  • What a context switch actually is
  • Exactly what gets saved and restored
  • What triggers a switch
  • The dispatcher & dispatch latency
  • The cost of switching
  • Mode switch vs context switch, and takeaways

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