<img width="100%" src="src/images/hotspot-logo.png">
# Hotspot - the Linux perf GUI for performance analysis
This project is a [KDAB](https://www.kdab.com) R&D effort to create a standalone
GUI for performance data. As the first goal, we want to provide a UI like
KCachegrind around Linux perf. Looking ahead, we intend to support various other
performance data formats under this umbrella.
## Table of Contents
<!--
TOC generated with https://github.com/jonschlinkert/markdown-toc
To update, run `markdown-toc -i README.md`
-->
<!-- toc -->
- [Screenshots](#screenshots)
- [Visualizing Data](#visualizing-data)
- [Time Line](#time-line)
- [Record Data](#record-data)
- [Getting Hotspot](#getting-hotspot)
- [ArchLinux](#archlinux)
- [Debian / Ubuntu](#debian--ubuntu)
- [Gentoo](#gentoo)
- [Fedora](#fedora)
- [For any Linux distro: AppImage](#for-any-linux-distro-appimage)
- [Building Hotspot](#building-hotspot)
- [Using](#using)
- [Off-CPU Profiling](#off-cpu-profiling)
- [Embedded Systems](#embedded-systems)
- [Import Export](#import-export)
- [tracepoints](#tracepoints)
- [Disassembler](#disassembler)
- [Known Issues](#known-issues)
- [Broken Backtraces](#broken-backtraces)
- [debuginfod](#debuginfod)
- [Missing Features](#missing-features)
- [Recording with perf without super user rights](#recording-with-perf-without-super-user-rights)
- [Export File Format](#export-file-format)
- [Qt Creator](#qt-creator)
- [License](#license)
<!-- tocstop -->
## Screenshots
Here are some screenshots showing the most important features of Hotspot in action:
### Visualizing Data
The main feature of Hotspot is the graphical visualization of a `perf.data` file.
Note: Inlined functions have a darker border than non-inlined ones.
### Time Line
The time line allows filtering the results by time, process or thread. The data views are updated accordingly.
### Record Data
You can also launch `perf` from Hotspot, to profile a newly started application
or to attach to already running process(es). Do take the
[caveats below](#recording-with-perf-without-super-user-rights) into account though.
## Getting Hotspot
*Note: Hotspot is not yet packaged on all Linux distributions. In such cases, or if you want to use the
latest version, please use the AppImage which will work on any recent Linux distro just fine.*
### ArchLinux
Hotspot is available in AUR (https://aur.archlinux.org/packages/hotspot).
### Debian / Ubuntu
Hotspot is available in Debian (https://packages.debian.org/hotspot) and Ubuntu
(https://packages.ubuntu.com/hotspot).
### Gentoo
Hotspot ebuilds are available from our overlay (https://github.com/KDAB/kdab-overlay).
### Fedora
Hotspot is available in Fedora (https://packages.fedoraproject.org/pkgs/hotspot/hotspot/).
### For any Linux distro: AppImage
You can either head over to the most [current release](https://github.com/KDAB/hotspot/releases/latest)
or the [continuous build](https://github.com/KDAB/hotspot/releases/tag/continuous).
In both cases you'll find the AppImage under "Assets" that you can download.
Untar the AppImage file (in case of the latest release), then make it executable and then run it.
Please use the latest build to get the most recent version. If it doesn't work, please report a
bug and test the latest stable version.
*Note: Your system libraries or preferences are not altered. In case you'd like to remove Hotspot again,
simply delete the downloaded file. Learn more about AppImage [here](https://appimage.org/).*
To find out how to debug the AppImage, see [HACKING](HACKING.md#debugging-the-appimage).
## Building Hotspot
Building Hotspot from source gives you the latest and greatest, but you'll have to make sure all its
dependencies are available. Most users should probably [install Hotspot](#getting-hotspot) from the distro
package manager or as an [AppImage](#for-any-linux-distro-appimage).
For everyone that wants to contribute to Hotspot or use the newest version without the AppImage detailed
notes are found at [HACKING](HACKING.md#table-of-contents).
## Using
### General
First of all, record some data with `perf`. To get backtraces, you will need to enable the dwarf callgraph
mode:
```bash
perf record --call-graph dwarf <your application>
...
[ perf record: Woken up 58 times to write data ]
[ perf record: Captured and wrote 14.874 MB perf.data (1865 samples) ]
```
Now, if you have Hotspot available on the same machine, all you need to do is launch it.
It will automatically open the `perf.data` file in the current directory (similar to `perf report`).
Alternatively, you can specify the path to the data file on the console:
```bash
hotspot /path/to/perf.data
```
### Command Line options
Depending on your needs you may want to pass additional command line options to Hotspot.
This allows to one-time set configuration options that are found in the GUI under "Settings"
and also allows to convert Linux perf data files into the smaller and portable perfdata format
(see [Import / Export](#import-export) for details on that).
All command line options are shown with `--help`:
```text
Usage: hotspot [options] [files...]
Linux perf GUI for performance analysis.
Options:
-h, --help Displays help on commandline options.
--help-all Displays help including Qt specific options.
-v, --version Displays version information.
--sysroot <path> Path to sysroot which is used to find libraries.
--kallsyms <path> Path to kallsyms file which is used to resolve
kernel symbols.
--debugPaths <paths> Colon separated list of paths that contain debug
information. These paths are relative to the
executable and not to the current working directory.
--extraLibPaths <paths> Colon separated list of extra paths to find
libraries.
--appPath <path> Path to folder containing the application executable
and libraries.
--sourcePaths <paths> Colon separated list of search paths for the source
code.
--arch <path> Architecture to use for unwinding.
--exportTo <path> Path to .perfparser output file to which the input
data should be exported. A single input file has to
be given too.
--perf-binary <p
The Linux perf GUI for performance analysis..zip
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The Linux perf GUI for performance analysis..zip （294个子文件） 
vector_static_gcc_v9.1.0 1003KB BaseUbuntu20.04 1KB BaseUbuntu22.04 887B BaseArchlinux 490B BaseArchlinuxWithoutOptional 447B BaseFedora34 720B BaseNeonQt6 1KB BaseOpenSuseTumbleweed 707B BuildDependencies 445B BuildDependenciesQt6 1KB BuildHotspotWithoutPresets 359B BuildHotspotWithPresets 155B BuildHotspotWithPresetsQt6 163B main.c 769B main.c 740B c-fork.c 721B .clang-format 1KB .clang-tidy 1KB ECMEnableSanitizers.cmake 6KB perfparser.cmake 4KB FindLibElf.cmake 3KB FindQCustomPlot.cmake 2KB FindElfUtils.cmake 2KB hotspot-config.h.cmake 890B HotspotMacrosInternal.cmake 643B Findobjdump.cmake 414B PrefixTickLabels.cmake 317B perfparser.cpp 73KB tst_models.cpp 43KB flamegraph.cpp 42KB tst_perfparser.cpp 41KB recordpage.cpp 30KB resultsdisassemblypage.cpp 27KB timelinedelegate.cpp 26KB mainwindow.cpp 23KB tst_disassemblyoutput.cpp 18KB util.cpp 15KB disassemblyoutput.cpp 15KB data.cpp 15KB resultspage.cpp 14KB eventmodel.cpp 13KB settingsdialog.cpp 13KB resultscallercalleepage.cpp 12KB recordhost.cpp 11KB main.cpp 11KB highlightedtext.cpp 11KB resultsutil.cpp 10KB settings.cpp 10KB timelinewidget.cpp 9KB resultssummarypage.cpp 9KB treemodel.cpp 9KB perfrecord.cpp 9KB disassemblymodel.cpp 9KB sourcecodemodel.cpp 9KB filterandzoomstack.cpp 8KB timeaxisheaderview.cpp 8KB frequencypage.cpp 7KB callercalleemodel.cpp 6KB tst_formatting.cpp 5KB callgraphwidget.cpp 5KB processlist_unix.cpp 5KB processmodel.cpp 5KB startpage.cpp 4KB perfoutputwidgetkonsole.cpp 4KB resultsbottomuppage.cpp 4KB perfcontrolfifowrapper.cpp 4KB resultsflamegraphpage.cpp 4KB callgraphgenerator.cpp 4KB elfwalk.cpp 3KB costheaderview.cpp 3KB multiconfigwidget.cpp 3KB initiallystoppedprocess.cpp 3KB tst_timelinedelegate.cpp 3KB tst_search.cpp 3KB codedelegate.cpp 3KB tst_callgraphgenerator.cpp 3KB resultstopdownpage.cpp 3KB dockwidgetsetup.cpp 2KB dump_perf_data.cpp 2KB perfoutputwidgettext.cpp 2KB frequencymodel.cpp 2KB costdelegate.cpp 2KB copyabletreeview.cpp 2KB processfiltermodel.cpp 2KB callercalleeproxy.cpp 2KB topproxy.cpp 2KB costcontextmenu.cpp 1KB aboutdialog.cpp 1KB main.cpp 956B main.cpp 893B main.cpp 775B formattingutils.cpp 747B staticlib.cpp 730B sharedlib.cpp 730B main.cpp 687B main.cpp 632B main.cpp 609B main.cpp 595B main.cpp 592B perfoutputwidget.cpp 439B共 294 条
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