LTTng
Open-knowledge reference entry
LTTng (Linux Trace Toolkit: next generation) is a system software package for correlated tracing of the Linux kernel, applications and libraries. The project was originated by Mathieu Desnoyers with an initial release in 2005. Its predecessor is the Linux Trace Toolkit.
LTTng uses the Tracepoint instrumentation of the Linux kernel, as well as various other information sources such as kprobes, and the Perf performance monitoring counters.
Designed for minimal performance impact and having a near-zero impact when not tracing, it is useful for debugging a wide range of bugs that are otherwise extremely challenging.
Features
The challenging problems traceable with LTTng include, for example, performance problems on parallel systems and on real-time systems.
Custom instrumentation is easy to add.
Structure
LTTng consists of kernel modules (for Linux kernel tracing) and dynamically linked libraries (for application and library tracing). It is controlled by a session daemon, which receives commands from a command line interface, lttng. The Babeltrace project allows translating traces into a human-readable log, and provides a trace reading library, libbabeltrace.
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This entry incorporates text from “LTTng” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.