System tracing on Android Samsung: a complete guide for users and developers

When a smartphone Samsung starts to slow down, overheat or produce errors, Diagnosing a problem often requires an in-depth analysis of the system's operation. This is where tracing comes to the rescue - a tool that records detailed information about the processes running on the device. But what is this in practice? For the average user, tracing may seem like something from the field of programming, but even without technical knowledge it can be used to identify problems or send logs to support.

In this article we will look at how tracing works on Androiddevices Samsung, what types of system logs exist, and how to collect them correctly. You'll learn where trace files are stored, how to read them (at least superficially), and when you can't do without this tool. And if you are a developer, you will find here the latest commands ADB and tips for analyzing performance via systrace or atrace.

What is system tracing on Android

Tracing (from English tracing) is a process entries sequences of eventsoccurring in the operating system or application. In context Android it allows you to track:

• 🔄 Starting and stopping processes (including system services and user applications)
• ⚡ Resource usage: CPU, memory, network, battery
• ⚠️ Errors and exceptions (application crashes, interface freezes)
• 📡 Interaction with hardware components (camera, GPS, sensors)

On devices Samsung tracing is implemented at several levels:

1. Linux kernel (ftrace) - low-level events related to the operation of the processor and drivers.
2. Android framework (atrace, systrace) - events at the system level (activities, services, graphic rendering).
3. Applications - logs specific to a particular software (for example, logcat for debugging).

It is important to understand that tracing is not equivalent to regular logs (logcat). If the log is a text file with event records, then the trace records time stamps and connections between processeswhich allows you to restore the full picture of the incident. For example, why the application slows down when opening the camera or why the phone discharges in 2 hours.

Why do you need tracing on Samsung smartphones

For most users, tracing is associated with something complicated and unnecessary. However, there are several scenarios when you cannot do without it:

1. Fault diagnosis. If your phone randomly reboots, gets hot, or lags, trace logs can help identify the culprit. For example, the service center Samsung may ask to provide files bugreport or systrace for analysis.

2. Performance optimization. Developers of games and heavy applications (for example, video editors) use tracing to find bottlenecks in the code - for example, why rendering frames takes too long.

3. Catching bugs in the firmware. After the update One UI some functions may not work correctly. Trace logs help engineers Samsung reproduce the problem and issue a patch.

4. Battery consumption analysis. If the battery drains too quickly, the trace will show which process is “consuming” energy in the background (for example, an incorrectly working sensor or Google Play service).

⚠️ Attention: On devices with Knox (enterprise or secure models Samsung), some types of tracing may be limited by security policies. Attempting to write logs on such a device can lead to blocking Knoxfunctions.

Usage scenario	Trace type	Who usually requests
Spontaneous reboots	bugreport, kernel log	Service center, Samsung support
Lags in games/applications	systrace, gpu trace	Software developers
Rapid battery drain	battery stats, atrace	User for self-analysis
Problems with the network (Wi-Fi, 5G)	netlog, radio log	Communication operator

Types of tracing on Android Samsung: which log is responsible for what

System Android generates several types of trace data. Let's look at the main ones that are available on smartphones Samsung:

1. logcat - the most famous tool, but this is not tracing in its pure form, but rather a stream of logs from applications and the system. Captures level messages DEBUG, INFO, WARNING, ERROR. Useful for catching crashes (ANR — "Application Not Responding").

2. systrace —a tool for performance analysis. Records events from the kernel, drivers and framework Android in a format suitable for visualization (for example, through Perfetto UI). Helps find the causes of lags in the interface.

3. atrace — simplified version systrace, working through ADB. Suitable for quickly collecting data without installing additional tools.

4. ftrace —low-level kernel tracing Linux. Used to diagnose problems with drivers (for example, a broken fingerprint sensor Requires). rights root or special permissions.

5. bugreport —an archive with a complete snapshot of the system state at the time of collection. Includes logs logcat, data about processes (dumpsys), information about hardware. This is what support asks for. data-i="121">when applying under warranty. Samsung when applying for warranty.

6. netlog i radio log —specialized logs for diagnosing problems with a mobile network or Wi-Fi. They record communications module events (for example, switching between 4G and 5G).

What is the difference between logcat and systrace?

Logs logcat show text messages from applications (for example, "Error connecting to server"), while systrace captures timestamps and connections between processes (for example, "App A was blocked for 200 ms while waiting for a response from service B").

How to enable tracing on Samsung: step-by-step guide

Methods of collecting trace data depend on your purpose and level of access to the device. Let's consider options from simple to complex.

Method 1: Collecting a bugreport through the developer menu (without a PC)

This method is suitable for sending logs to support Samsung or diagnosing general problems.

The finished archive will be in the format .zip and weigh 10–50 MB. You can send it to support or analyze it yourself (for example, via gnirehtet to view on a PC).

Method 2: Using ADB to collect systrace

If you need to analyze performance (for example, lags in the game), use systrace:

1. Connect the phone to the PC with installed ADB and Python.
2. Enable USB debugging in the developer settings.
3. Run the command:

   python -m systrace --time=10 -o trace.html

   where --time=10 — recording duration in seconds.

The result will be a file trace.htmlthat can be opened in a browser for visual analysis.

Method 3: Manually enabling ftrace (for advanced)

To diagnose kernel problems (for example, system freezes), use ftrace:

adb shell
echo 1 > /sys/kernel/debug/tracing/tracing_on
Run the script that reproduces the problem
echo 0 > /sys/kernel/debug/tracing/tracing_on
cat /sys/kernel/debug/tracing/trace > /sdcard/ftrace.log

On Samsung devices with a locked bootloader, access to /sys/kernel/debug/ may be limited. In this case, you will need to unlock OEM (which will void the warranty).

⚠️ Attention: Long recording ftrace or systrace (more than 30 seconds) may cause the device to overheat and force recording to stop. On weak models (for example, Galaxy A10) it is recommended to limit it to 5-10 seconds.

Where trace files are stored and how to read them

Trace logs are saved in different places depending on the collection method:

• 📁 /sdcard/bugreports/ — archives bugreport (format .zip or .tar.gz).
• 📁 /sdcard/ — files systrace.html or ftrace.logif you specified the path when recording.
• 🖥️ Folder with ADB on PC - if logs were saved directly through the command adb pull.

To read logs, use:

• 🌐 Perfetto UI (for systrace) - visualizes time diagrams of processes.
• 📄 Text editors (VS Code, Notepad++) - for viewing logcat or ftrace.log.
• 🔍 Logcat Reader (applications in the Play Market) - for analyzing logs directly on the phone.

Visualization example systrace:

The screenshot below shows the analysis of lags in the interface. Red bars indicate thread blocking, and green bars indicate active processor activity. Such data helps to understand why the application freezes when scrolling.

When tracing can harm the device

Despite its usefulness, uncontrolled use of tracing is fraught with consequences:

1. System overload. logs (especially ftrace) increases the load on the CPU and can lead to:

• ⚡ Rapid battery drain (up to 30% per hour).
• 🔥 Overheating (risk of throttling or emergency shutdown).
• 🐢 Slowdown (lags in the interface).

2. Memory occupation. Trace files take up space on internal storage. For example, an hour of recording systrace can eat up to 1 GB.

3. Security risks. Logs contain confidential information:

• 🔑 Account data (if logs were collected during authorization).
• 📍 Location history (from GPS logs or network connections).
• 📱 IMEI and device serial number.

⚠️ Attention: Never publish full tracing logs in open sources (forums, social networks). To send to support Samsung use official channels (for example, Samsung Members with private file upload).

If you are a developer and testing the trace on your device, after completing the work:

Alternatives to tracing for ordinary users

If you don’t want to understand logging, but need to diagnose the problem, use the built-in tools Samsung:

1. Samsung Members → "Diagnostics"

The application automatically checks the device for hardware and software problems, offering solutions (for example, clearing the cache or updating the software).

2. Device Care (in settings)

Shows:

• 📉 Battery status and energy consumption by application.
• 🧹 Memory load and optimization suggestions.
• 🛡️ Security (vulnerabilities in the firmware).

3. SmartThings (for monitoring)

If the problem is related to connecting to other devices (for example, Galaxy Watch or SmartTag), check the synchronization logs in this application.

4. Safe startup mode

Reboot the phone into Safe Mode (press the power button → “Safe Mode”). If the problem disappears, the third-party application is to blame. Remove apps one by one until you find the culprit.

💡

For 90% of user problems (lags, overheating, rapid discharge), the built-in tools are sufficient. Samsung. Tracing is needed only for in-depth diagnostics or upon support request.

FAQ: Frequently asked questions about tracing on Samsung

Is it possible to enable tracing without root access?

Yes, most methods (for example, bugreport or systrace via ADB) work without root. However, access to ftrace or some system logs may require additional permissions, which are often blocked. Samsung often blocked.

How to send logs to Samsung support?

1. Collect bugreport (as described above).

2. Go to the application Samsung Members → “Support” → “Send feedback.”

3. Attach an archive with logs and describe the problem. Alternatively, use the chat with support on the official website.

Why doesn't tracing run on my Samsung?

Possible reasons:

— Developer rights are missing (must be activated in settings).

— Blocking Knox (on corporate devices).

— Outdated version ADB (update Platform Tools).

— Not enough space on the device (free up at least 1 GB).

Is it possible to delete old trace files?

Yes, they are not system files and can be deleted without consequences. To do this:

1. Open the “My Files” application.
2. Go to the folder /sdcard/bugreports/ or /sdcard/.
3. Delete unnecessary archives (for example, bugreport-*.zip).

Are there applications for automatic tracing?

Yes, but their capabilities are limited:

— Logcat Extreme (for reading logcat).

— SysLog (viewing system logs).

— Trepn Profiler (performance analysis, alternative systrace).

Caution: many such applications require root or may contain advertising.