Observation range

System-wide insight
LTTng allows to understand the interactions between multiple components of a given system, i.e.:
The Linux kernel, using either already available or user-defined instrumentation points
C/C++ applications
Java applications
Python applications
Any other user space application using the LTTng logger
Tracing all those components with LTTng produces a unified log of events, providing great insight into the system’s behavior.

High performance

LTTng The original design intention of is to provide low overhead tracking on the production system . The tracker combines basic technologies （ For example, every CPU buffer 、RCU data structure 、 Compact and efficient binary tracking format ） To achieve this excellent performance . LTTng Interfere with the tracked system as little as possible , To make it possible to track subtle competition conditions and rare interrupt cascades . Limited resources on the platform , For example, some Linux Embedded system , You can use out of the box LTTng To help developers identify the root cause of problems that are difficult to debug .

Such a cow ？ Then why is it still not merged into Linux Thread ...hh

flexible

Whether your goal is a small embedded system or a large cloud ,LTTng Can provide flexible configuration options , To accommodate the workload of the system .
LTTng Support IA-32（x86）,x86-64,PowerPC,ARM and MIPS And so on .
LTTng The trace session mechanism of makes it possible to record multiple traces at the same time with different configuration options . Every Unix Users can create and configure any number of tracking sessions as needed .
for example , According to your specific plan , You may wish to ：
Local tracking ： A trace of the local file system recorded to the target , Then use one of the many compatible viewers to investigate what happened .
Remote tracking ： Send tracking data over the network . It is necessary to build the upper computer , You can remotely monitor .
View live broadcast ： When real-time monitoring events occur .
take snapshot ： if necessary , Please keep only the latest event log of fixed size .
Save the shared memory of the ring buffer on the persistent memory file system .
Flexible
Whether your target is a small embedded system or a large cloud, LTTng provides flexible configuration options that can accommodate the system’s workload. LTTng supports architectures such as IA-32 (x86), x86-64, PowerPC, ARM, and MIPS, amongst others.
LTTng’s tracing session mechanism makes it possible to record multiple traces concurrently with different configuration options. Each Unix user may create and configure as many tracing sessions as needed.
Depending on your specific scenario, you may wish, for example, to:
Trace locally: Record a trace to the target’s local filesystem, then use one of the many compatible viewers to investigate what happened.
Trace remotely: Send trace data over the network.
View a live stream: Monitor events as they occur, in real-time.
Take a snapshot: When desired, keep only a fixed-sized log of the latest events.
Keep ring buffers’ shared memory on a persistent memory file system.

Ease of use

I tried it yesterday . Installing from the source code is to download several dependent packages . then 3 individual LTTng My bag . All the way configure make That's all right. .
from Ubuntu Of apt Easier to install .
Tracecomapss It is also used out of the box . very nice .,
Here it is The unified entrance is to use lttng The interface hh.
Easy
As LTTng is packaged for many major Linux distributions, you can often use your package manager to install it.
As a user, you control the tracers with a single tool, the lttng command-line interface.
Multiple tools are available to view and analyze the traces that LTTng produces: GUI, CLI tools, and custom scripts.