Operating systems notes
Race Conditions & the Critical Section
What breaks the instant two threads touch the same data, and the exact problem every lock exists to solve. Every section is a drawn page beside a clear written explanation, about 16 minutes in all.
- Chapter 14 of 37
- About 16 minutes
- 7 sections
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In this chapter
- When sharing goes wrong
- Anatomy of a race: count++ is three steps
- The critical section
- The three requirements of a correct solution
- A naive attempt, and why it fails
- Atomicity, and why "just be careful" fails
- Where this bites engineers
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