macOS
Homebrewverified · 100%
brew install lttng-ustlocal Homebrew formula metadata
brew
Install lttng-ust with Homebrew, apk, dnf, Nix, pacman, zypper
Linux Trace Toolkit Next Generation Userspace Tracer. Version 2.15.1 via Homebrew; verified 2026-06-15.
install
Additional install commands
Linux
Alpine Linux apkverified · 92%
sudo apk add lttng-ustAlpine Linux edge package indexes · lttng-ust · source: dl-cdn.alpinelinux.org
Fedora dnfverified · 92%
sudo dnf install lttng-ustFedora Rawhide package metadata · lttng-ust · source: dl.fedoraproject.org
Nixverified · 92%
nix profile install nixpkgs#lttng-ustnixpkgs package indexes · pkgs/by-name/lt/lttng-ust/package.nix · source: api.github.com
Arch Linux pacmanverified · 92%
sudo pacman -S lttng-ustArch Linux sync databases · lttng-ust · source: geo.mirror.pkgbuild.com
openSUSE zypperverified · 92%
sudo zypper install liblttng-ust-ctl6openSUSE Tumbleweed package metadata · liblttng-ust-ctl6 · source: download.opensuse.org
overview
Package summary
Linux Trace Toolkit Next Generation Userspace Tracer
Project links
Commands and aliases
- lttng-gen-tp
history
Project history and usage
LTTng-UST is the user-space tracing component of the LTTng project. It provides libraries and agents that let C, C++, Java, Python, and other user applications emit events into LTTng traces, complementing the LTTng kernel tracer and LTTng-tools control utilities.
Project history
LTTng, short for Linux Trace Toolkit: next generation, grew out of the Linux tracing work associated with Mathieu Desnoyers and the Polytechnique Montreal/EfficiOS ecosystem. Official LTTng publications list papers and talks from the mid-2000s onward, including 2006 work on low-impact GNU/Linux tracing, 2008 work on tracing across hypervisor-to-user-space execution layers, and 2009 work on combining kernel and application tracing.
The LTTng documentation presents LTTng as a toolkit made of separate but coordinated components: LTTng-tools for control, LTTng-modules for kernel instrumentation, and LTTng-UST for user-space instrumentation. LTTng-UST specifically contains shared libraries for C/C++ user applications, Java and Python tracing support, and user-space helpers, all designed to record low-overhead traces that can be correlated with kernel events.
Adoption history
LTTng-UST became important because full-system performance debugging often needs both sides of the user/kernel boundary. The official documentation emphasizes correlated kernel, user application, and user library tracing, plus low overhead and production suitability. The supplied package-manager facts show broad distribution packaging across Homebrew, apk, dnf, Nix, pacman, and zypper, which matches the official claim that LTTng is available on major desktop, server, and embedded Linux distributions.
The LTTng 2.x series also made LTTng-UST a separately versioned package that tracks the same minor release series as the rest of LTTng. The official download page lists current release archives and Git clone URLs for lttng-tools, lttng-ust, and lttng-modules, and notes that applications instrumented with older LTTng-UST versions do not need to be rebuilt for newer LTTng-tools.
How it is used
Developers use LTTng-UST by linking applications against liblttng-ust or by loading user-space tracing helpers. The man page documents three main paths: printf-like tracef APIs, log-level tracelog APIs, and custom tracepoint providers. In normal workflows LTTng-tools controls sessions, enables user-space events, records traces, and hands trace data to viewers such as Babeltrace.
The package matters most for performance investigations, production diagnostics, embedded Linux tracing, and situations where logging is either too high level or too expensive. It is not a configuration-file-driven command-line app; it is a library and instrumentation toolkit, so no credentials or persistent user config path is part of the package identity.
Why package nerds care
LTTng-UST is a classic packaging dependency for serious Linux observability stacks: it is not only an executable, but a set of ABI-sensitive libraries that other instrumented software links against. Package managers care about it because version compatibility with LTTng-tools, liburcu, optional agents, and distribution library paths directly affects whether traces can be recorded in production.
Timeline
- 2006: Official publications list LTTng work on low-impact GNU/Linux tracing.
- 2009: Official publications include combined kernel and application tracing with LTTng.
- 2012: LTTng 2.0 era talks presented application, library, and kernel tracing within Linux distributions.
- 2026: Official documentation still presents LTTng as active open source Linux tracing infrastructure, with LTTng-UST as the user-space component.
Related projects
- LTTng-tools controls tracing sessions and enables LTTng-UST events.
- LTTng-modules provides the Linux kernel tracing side of the same toolkit.
- Userspace RCU is a build dependency documented by LTTng for LTTng-tools and LTTng-UST.
- Babeltrace is commonly used to view or process LTTng trace data.
Sources
security posture
Risk level: green
narrow executable package without higher-risk signals.
Risk classifier
green risk · low confidence · appliance
Why
- narrow executable package without higher-risk signals
Signals
- metadata:no-higher-risk-signals
Install behavior
- No Homebrew post-install hook is recorded in formula metadata.
- Homebrew bottle metadata is available for 2 platform targets.
- Installs with 2 runtime dependencies.
- Build metadata lists 1 build dependencies.
Recommended review
Before unattended agent use, check whether the tool reads plaintext credentials, writes remote state, publishes artifacts, or shells out to plugins.
executables
Installed executables
| Command | Kind | Exposure | Note |
|---|---|---|---|
lttng-gen-tp | cli | global executable |
freshness
Version and freshness
These signals separate page generation age, package-manager activity, and upstream release comparison. Version lag is warned only when an evidence URL and comparable versions are present.
page generated2026-07-08
manager version2.15.1
manager updated2026-06-15
local dataok
upstreamnot checked
latest detectednot detected
- infoRelease/tag comparison is only available for GitHub repositories.https://lttng.org/none confidence
install metadata
Package metadata
| Package key | brew:lttng-ust |
|---|---|
| Version | 2.15.1 |
| Package manager | Homebrew |
| Package manager page | https://formulae.brew.sh/formula/lttng-ust |
| Homepage | https://lttng.org/ |
| Repository | https://git.lttng.org/lttng-ust.git |
| Upstream docs | https://lttng.org/docs |
| License | LGPL-2.1-only AND MIT AND GPL-2.0-only AND BSD-3-Clause AND BSD-2-Clause AND GPL-3.0-or-later |
| Source archive | https://lttng.org/files/lttng-ust/lttng-ust-2.15.1.tar.bz2 |
| Last updated | 2026-06-15T17:16:33Z |
| Pulse | updated |
| Dependencies | numactl, userspace-rcu |
| Build dependencies | pkgconf |
| Bottle | available (on arm64_linux, x86_64_linux) |
| Homebrew post-install | not defined |
| Service | none declared |
registry facts
Source database details
| Source Database | Homebrew formula API |
|---|---|
| Tap | homebrew/core |
| Full Name | lttng-ust |
| Version Scheme | 0 |
| Revision | 0 |
| Requirements |
|
| Bottle Stable Root URL | https://ghcr.io/v2/homebrew/core |
| Deprecated | no |
| Disabled | no |
| Keg Only | no |
| URL Keys |
|
source database matches
Other package-manager records
Matches are pulled from external package-manager indexes and kept separate from local Automic Vault package links.
Nix95%
lttng-ust
nix profile install nixpkgs#lttng-ust- normalized package name match
- Matched by: Lttng Ust
apk95%
lttng-ust 2.14.2-r0
LTTng 2.0 Userspace Tracer
sudo apk add lttng-ust- License: LGPL-2.1-only AND GPL-2.0-only AND MIT
- Architecture: x86_64
- Source Package: lttng-ust
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Lttng Ust
apk95%
lttng-ust-dev 2.14.2-r0
LTTng 2.0 Userspace Tracer (development files)
sudo apk add lttng-ust-dev- License: LGPL-2.1-only AND GPL-2.0-only AND MIT
- Architecture: x86_64
- Source Package: lttng-ust
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Lttng Ust
apk95%
lttng-ust-doc 2.14.2-r0
LTTng 2.0 Userspace Tracer (documentation)
sudo apk add lttng-ust-doc- License: LGPL-2.1-only AND GPL-2.0-only AND MIT
- Architecture: x86_64
- Source Package: lttng-ust
- normalized package name match
- Matched by: Lttng Ust
apk95%
lttng-ust-tools 2.14.2-r0
tools from lttng-ust
sudo apk add lttng-ust-tools- License: LGPL-2.1-only AND GPL-2.0-only AND MIT
- Architecture: x86_64
- Source Package: lttng-ust
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Lttng Ust
apk95%
py3-lttng 2.14.2-r0
lttng-ust python agent
sudo apk add py3-lttng- License: LGPL-2.1-only AND GPL-2.0-only AND MIT
- Architecture: x86_64
- Source Package: lttng-ust
- 1 dependencies
- 1 provides
- normalized package name match
- Matched by: Lttng Ust
dnf95%
lttng-ust 2.15.1-2.fc45
LTTng Userspace Tracer library
sudo dnf install lttng-ust- License: LGPL-2.1-only AND MIT AND GPL-2.0-only AND BSD-3-Clause AND BSD-2-Clause
- Category: Unspecified
- Architecture: i686
- Source Package: lttng-ust
- 4 dependencies
- 13 provides
- normalized package name match
- Matched by: Lttng Ust
dnf95%
lttng-ust-devel 2.15.1-2.fc45
LTTng Userspace Tracer library headers and development files
sudo dnf install lttng-ust-devel- License: LGPL-2.1-only AND MIT AND GPL-2.0-only AND BSD-3-Clause AND BSD-2-Clause
- Category: Unspecified
- Architecture: i686
- Source Package: lttng-ust
- 17 dependencies
- 2 provides
- normalized package name match
- Matched by: Lttng Ust
dnf95%
python3-lttngust 2.15.1-2.fc45
Python bindings for LTTng UST
sudo dnf install python3-lttngust- License: LGPL-2.1-only AND MIT AND GPL-2.0-only AND BSD-3-Clause AND BSD-2-Clause
- Category: Unspecified
- Architecture: x86_64
- Source Package: lttng-ust
- 2 dependencies
- 5 provides
- normalized package name match
- Matched by: Lttng Ust
pacman95%
lttng-ust 2.15.1-1
LTTng user space tracing libraries for LTTng
sudo pacman -S lttng-ust- License: LGPL-2.1-only AND MIT AND GPL-2.0-only AND BSD-3-Clause AND BSD-2-Clause AND GPL-3.0-or-later
- Architecture: x86_64
- 4 dependencies
- normalized package name match
- Matched by: Lttng Ust
zypper95%
liblttng-ust-ctl6 2.14.0-1.2
Linux Trace Toolkit Userspace Tracer library
sudo zypper install liblttng-ust-ctl6- License: GPL-2.0-only
- Category: System/Libraries
- Architecture: x86_64
- Source Package: lttng-ust
- 5 dependencies
- 2 provides
- normalized package name match
- Matched by: Lttng Ust
zypper95%
liblttng-ust-ctl6-32bit 2.14.0-1.2
Linux Trace Toolkit Userspace Tracer library
sudo zypper install liblttng-ust-ctl6-32bit- License: GPL-2.0-only
- Category: System/Libraries
- Architecture: x86_64
- Source Package: lttng-ust
- 5 dependencies
- 2 provides
- normalized package name match
- Matched by: Lttng Ust
zypper95%
liblttng-ust-python-agent1 2.14.0-1.2
Linux Trace Toolkit Userspace Tracer Python agent library
sudo zypper install liblttng-ust-python-agent1- License: GPL-2.0-only
- Category: System/Libraries
- Architecture: x86_64
- Source Package: lttng-ust
- 4 dependencies
- 2 provides
- normalized package name match
- Matched by: Lttng Ust
zypper95%
liblttng-ust-python-agent1-32bit 2.14.0-1.2
Linux Trace Toolkit Userspace Tracer Python agent library
sudo zypper install liblttng-ust-python-agent1-32bit- License: GPL-2.0-only
- Category: System/Libraries
- Architecture: x86_64
- Source Package: lttng-ust
- 4 dependencies
- 2 provides
- normalized package name match
- Matched by: Lttng Ust
zypper95%
liblttng-ust1 2.14.0-1.2
Linux Trace Toolkit Userspace Tracer library
sudo zypper install liblttng-ust1- License: GPL-2.0-only
- Category: System/Libraries
- Architecture: x86_64
- Source Package: lttng-ust
- 4 dependencies
- 11 provides
- normalized package name match
- Matched by: Lttng Ust
zypper95%
liblttng-ust1-32bit 2.14.0-1.2
Linux Trace Toolkit Userspace Tracer library
sudo zypper install liblttng-ust1-32bit- License: GPL-2.0-only
- Category: System/Libraries
- Architecture: x86_64
- Source Package: lttng-ust
- 5 dependencies
- 11 provides
- normalized package name match
- Matched by: Lttng Ust
source trail
Generated from repository data
This page is generated by av-web from the private package SQLite artifact built by scripts/generate-pkg-sqlite.py.
Combined YAML source
View the package source record on GitHub.
Used sources
- Geiger risk classifier
- Nucleus package database
- av.db category and tag curation
- cross-ecosystem install command graph
- curated package history
- external package-manager database matches
- package relationship graph
- package version freshness
- package-page enrichment