ftrace VS ktap

A function tracer for the Linux kernel.

A script-based dynamic tracing tool for Linux.

Function Tracing
ftrace provides a robust function tracing capability that allows developers to track function calls within the Linux kernel. This helps in identifying performance bottlenecks and debugging complex issues.
Dynamic Tracing
It supports dynamic tracing, which means that trace points can be added or removed at runtime without needing to reboot or recompile the kernel, offering flexibility and reducing downtime.
Performance Analysis
ftrace can be used for detailed performance analysis, helping to monitor system performance and resource usage, which is crucial for optimizing system behavior.
Lightweight
ftrace is designed to be lightweight, ensuring minimal performance overhead on the system, which is an essential feature for maintaining system stability and performance during tracing.
Wide Adaptability
It's widely adaptable across different architectures and is included in the Linux kernel, making it a versatile tool for Linux developers.

Complexity
Setting up and using ftrace can be complex, especially for beginners, due to its extensive options and configurations which might require a steep learning curve.
Limited User-space Tracing
ftrace primarily focuses on kernel space, which means its capabilities for tracing user-space applications are limited compared to some other tools.
Potential for Large Data Volume
The tool can generate a large amount of trace data, which can be overwhelming to manage and analyze, requiring efficient data handling and filtering techniques.
Kernel Version Dependent
Since ftrace features are closely tied to the kernel version, using the latest functionalities requires updating to the latest kernel, which may not always be feasible in production environments.
Security Concerns
Enabling tracing can potentially expose sensitive information or alter the system's behavior, raising security concerns if not properly managed.