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2 cards from this section. Quick, good the night before a test.
What command do you use to set ftrace to function tracing?
Think about how you would set a variable in the kernel.
How do you enable tracing in ftrace?
Consider how you would turn on a feature.
What does ftrace primarily do?
Consider what 'trace' implies in terms of observing function behavior within the kernel.
True or False: ftrace can only analyze performance in user-space applications.
Think about the difference between user-space and kernel-space functionality.
Using ftrace, explain how you would identify and optimize a slow-running kernel function.
Think about how visibility into function execution can lead to targeted improvements.
Design a small experiment using ftrace to compare the performance of two different kernel functions.
Consider how direct comparison can help illuminate performance disparities.
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