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Chapter 6. Profiling
66
Ease of Use
The OProfile Plug-in provides generally useful defaults for all options, usable for a majority of profiling
runs. In addition, it also features a "one-click profile" that executes a profile run using these defaults.
Users can profile applications from start to finish, or select specific areas of code through a manual
control dialog.
The OProfile plug-in for Eclipse is provided by the eclipse-oprofile package. For more
information about this plug-in, refer to OProfile Integration User Guide in the Eclipse Help Contents
(also provided by eclipse-profile).
6.3.4. OProfile Documentation
For a more extensive information on OProfile, refer to man oprofile. Red Hat Enterprise
Linux 6 also provides two comprehensive guides to OProfile in file:///usr/share/doc/
oprofile-version/:
OProfile Manual
A comprehensive manual with detailed instructions on the setup and use of OProfile is found at
file:///usr/share/doc/oprofile-version/oprofile.html
OProfile Internals
Documentation on the internal workings of OProfile, useful for programmers interested
in contributing to the OProfile upstream, can be found at file:///usr/share/doc/
oprofile-version/internals.html
The OProfile Integration User Guide in the Eclipse Help Contents also provides detailed information
on the setup and usage of the OProfile plug-in for Eclipse. This guide is provided by the eclipse-
oprofile package.
6.4. SystemTap
SystemTap is a useful instrumentation platform for probing running processes and kernel activity on
the Linux system. To execute a probe:
1. Write SystemTap scripts that specify which system events (e.g. virtual file system reads, packet
transmissions) should trigger specified actions (e.g. print, parse, or otherwise manipulate data).
2. SystemTap translates the script into a C program, which it compiles into a kernel module.
3. SystemTap loads the kernel module to perform the actual probe.
SystemTap scripts are useful for monitoring system operation and diagnosing system issues with
minimal intrusion into the normal operation of the system. You can quickly instrument running system
test hypotheses without having to recompile and re-install instrumented code. To compile a SystemTap
script that probes kernel-space, SystemTap uses information from three different kernel information
packages:
• kernel-variant-devel-version
• kernel-variant-debuginfo-version
• kernel-variant-debuginfo-common-version
These kernel information packages must match the kernel to be probed. In addition, to compile
SystemTap scripts for multiple kernels, the kernel information packages of each kernel must also be
installed.
- Red Hat Enterprise Linux 6 1
- Developer Guide 1
- Enterprise Linux 6 3
- Edition 0 3
- 1. Document Conventions 7
- 1.2. Pull-quote Conventions 8
- 1.3. Notes and Warnings 9
- 2.1. Do You Need Help? 9
- 2.2. We Need Feedback! 10
- Introduction to Eclipse 11
- 1.2. Help In Eclipse 13
- 1.3. Development Toolkits 15
- Environment (IDE) 17
- 2.2. Useful Hints 21
- 2.2.2. libhover Plug-in 27
- 2.2.2.1. Setup and Usage 28
- Libraries and Runtime Support 31
- 3.2.1. API Compatibility 32
- 3.2.2. ABI Compatibility 32
- 3.2.3. Policy 32
- 3.2.4. Static Linking 33
- 3.3.1. The GNU C Library 33
- std::vector 37
- elements in any order 37
- 3.3.3. Boost 38
- 3.3.3.1. Boost Updates 39
- 3.3.3.2. Boost Documentation 40
- 3.3.4. Qt 41
- 3.3.4.2. Qt Creator 42
- 3.3.5.1. KDE4 Architecture 42
- 3.3.6. Python 44
- 3.3.7. Java 45
- 3.3.8. Ruby 46
- 3.3.9. Perl 47
- 3.3.9.3. Perl Documentation 48
- Compiling and Building 49
- 4.1.2. Language Compatibility 50
- 4.1.6. Running GCC 53
- 4.1.6.1. Simple C Usage 54
- 4.1.6.2. Simple C++ Usage 54
- 4.2. Distributed Compiling 60
- 4.3. Autotools 60
- 4.3.2. Configuration Script 61
- Debugging 63
- 5.2.1. Simple GDB 64
- 5.2.2. Running GDB 65
- 5.2.4. Forked Execution 68
- 5.2.5. Threads 68
- 5.2.7. GDB Documentation 68
- 5.4. Python Pretty-Printers 69
- Highly Customizable 70
- Easy to Learn 70
- Profiling 71
- 6.2. Valgrind 72
- 6.2.2. Using Valgrind 73
- 6.3. OProfile 74
- 6.3.2. Using OProfile 75
- 6.4. SystemTap 76
- Unprivileged Users) 78
- 6.5. Eclipse-Callgraph 79
- Chapter 6. Profiling 80
- 6.5.2. The Callgraph View 81
- Go to Code 84
- 6.6.1. Perf Tool Commands 85
- 6.6.2. Using Perf 85
- 6.7. ftrace 87
- 6.7.2. ftrace Documentation 88
- Appendix A. Revision History 89
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