Practice Profiling Kernel-space Code (8.3.2) - System Debugging and Profiling

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10 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
4 questions · about 3 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What does ftrace do?
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Think about tracing and measurement in the kernel.
Question 2.
What command initiates perf to record performance data?
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Focus on the startup command for performance.
3Question 3.
What is the purpose of ftrace?
- Network analysis
- Tracing kernel functions
- Managing memory
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Think about what tracing specifically relates to.
4Question 4.
True or False: perf can only be used for user-space applications.
- True
- False
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Consider the abilities of the perf tool.
Question 5.
Write a SystemTap script that tracks all disk read operations happening in real-time and outputs the result to a log file.
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Focus on identifying the correct probes to track disk activity.
Question 6.
Analyze how the overhead induced by perf affects the performance of a kernel application during profiling.
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Think about how profiling may impact system response times.

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