Linux Tracing Technologies Guide¶

Tracing in the Linux kernel is a powerful mechanism that allowsdevelopers and system administrators to analyze and debug systembehavior. This guide provides documentation on various tracingframeworks and tools available in the Linux kernel.

Introduction to Tracing¶

This section provides an overview of Linux tracing mechanismsand debugging approaches.

Using the tracer for debugging
Using the Linux Kernel Tracepoints
Notes on Analysing Behaviour Using Events and Tracepoints
Tracefs ring-buffer memory mapping

Core Tracing Frameworks¶

The following are the primary tracing frameworks integrated intothe Linux kernel.

ftrace - Function Tracer
Function Tracer Design
Using ftrace to hook to functions
Kernel Probes (Kprobes)
Kprobe-based Event Tracing
Fprobe-based Event Tracing
Eprobe - Event-based Probe Tracing
Fprobe - Function entry/exit probe
Lockless Ring Buffer Design

Event Tracing and Analysis¶

A detailed explanation of event tracing mechanisms and theirapplications.

Event Tracing
Subsystem Trace Points: kmem
Subsystem Trace Points: power
NMI Trace Events
MSR Trace Events
Boot-time tracing
Event Histograms
Histogram Design Notes

Hardware and Performance Tracing¶

This section covers tracing features that monitor hardwareinteractions and system performance.

Intel(R) Trace Hub (TH)
System Trace Module
MIPI SyS-T over STP
CoreSight - ARM Hardware Trace
Runtime Verification
HiSilicon PCIe Tune and Trace device
In-kernel memory-mapped I/O tracing
Hardware Latency Detector
OSNOISE Tracer
Timerlat tracer

User-Space Tracing¶

These tools allow tracing user-space applications andinteractions.

user_events: User-based Event Tracing
Uprobe-tracer: Uprobe-based Event Tracing

Additional Resources¶

For more details, refer to the respective documentation of eachtracing tool and framework.

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