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Debugging

Linux Systems

Your Short Cut to Knowledge

rtcut

What This Mini-Book Will Cover

Product Description ...................... 3

Kernel Version

.............................. 4

Book Website

............................... 4

Conventions Used

......................... 4

Dedication

................................... 5

Kernel Debuggers

......................... 6

Kernel Probes

............................. 25

Kexec and Kdump

....................... 41

Profiling

..................................... 54

Tracing

....................................... 61

Debugging Embedded Linux

........ 67

Debugging Network

Throughput

................................ 83

Linux Test Project

........................ 86

User Mode Linux

......................... 87

Diagnostic Tools

......................... 87

Kernel Hacking Config Options

..... 87

Sreekrishnan Venkateswaran

informit.com/ph

From the Library of Ross Hagglund

ptg5994185

Product Description

Debugging Linux Systems discusses the main tools available today to debug 2.6 Linux Kernels. We

start by exploring the seemingly esoteric operations of the Kernel Debugger (KDB), Kernel GNU

DeBugger (KGDB), the plain GNU DeBugger (GDB), and JTAG debuggers. We then investigate

Kernel Probes, a feature that lets you intrude into a kernel function and extract debug information

or apply a medicated patch. Analyzing a crash dump can yield clues for postmortem analysis of

kernel crashes or hangs, so we take a look at Kdump, a serviceability tool that collects a system

dump after spawning a new kernel. Profiling points you to code regions that burn more CPU

cycles, so we learn to use the OProfile kernel profiler and the gprof application profiler to sense the

presence of code bottlenecks. Because tracing provides insight into behavioral problems that mani-

fest during interactions between different code modules, we delve into the Linux Trace Toolkit, a

system designed for high-volume trace capture.

The section “Debugging Embedded Linux” takes a tour of the I/O interfaces commonly found on

embedded hardware, such as flash memory, serial port, PCMCIA, Secure Digital media, USB, RTC,

audio, video, touch screen, and Bluetooth, and provides pointers to debug the associated device

drivers. We also pick up some board-level debugging skills with the help of a case study. The

section “Debugging Network Throughput” takes you through some device driver design issues and

protocol implementation characteristics that can affect the horsepower of your network interface

card. We end the shortcut by examining several options available in the kernel configuration

menu that can emit valuable debug information.

Debugging Linux Systems (Digital Shortcut)

by Sreekrishnan Venkateswaran

This publication is protected by copyright. Please see page 2 for more details.

From the Library of Ross Hagglund

Download at WoweBook.Com

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