---
name: "tracecmd_set_loglevel"
section: "3"
platform: "linux"
package: "trace-cmd"
version: "3.4-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/tracecmd_set_loglevel"
---

# tracecmd\_set\_loglevel(3)

Set log level of the library

## NAME

tracecmd\_set\_loglevel - Set log level of the library

## SYNOPSIS

```
#include <trace-cmd.h>
int tracecmd_set_loglevel(enum tep_loglevel level);
```

## DESCRIPTION

The **tracecmd\_set\_loglevel()** function sets the level of the library logs that will be printed on the console. See **[libtraceevent(3)](/libtraceevent/3.md)** for detailed desciription of the log levels. Setting the log level to specific value means that logs from the previous levels will be printed too. For example *TEP\_LOG\_WARNING* will print any logs with severity *TEP\_LOG\_WARNING*, *TEP\_LOG\_ERROR* and *TEP\_LOG\_CRITICAL*. The default log level is *TEP\_LOG\_CRITICAL*. When a new level is set, it is also propagated to the libtracefs and libtraceevent.

## EXAMPLE

```
#include <trace-cmd.h>
...
tracecmd_set_loglevel(TEP_LOG_ALL);
...
/* call libtracecmd, libtracefs or libtraceevent APIs and observe any logs they produce */
...
tracecmd_set_loglevel(TEP_LOG_CRITICAL);
```

## FILES

```
trace-cmd.h
        Header file to include in order to have access to the library APIs.
-ltracecmd
        Linker switch to add when building a program that uses the library.
```

## SEE ALSO

**[libtracefs(3)](/libtracefs/3.md)**, **[libtraceevent(3)](/libtraceevent/3.md)**, **[trace-cmd(1)](/trace-cmd/1.md)** **[trace-cmd.dat(5)](/trace-cmd.dat/5.md)**

## AUTHOR

```
Steven Rostedt <rostedt@goodmis.org[1]>
Tzvetomir Stoyanov <tz.stoyanov@gmail.com[2]>
```

## REPORTING BUGS

Report bugs to \<**linux-trace-devel@vger.kernel.org**\[3\]\>

## LICENSE

libtracecmd is Free Software licensed under the GNU LGPL 2.1

## RESOURCES

**https://git.kernel.org/pub/scm/utils/trace-cmd/trace-cmd.git/**

## COPYING

Copyright (C) 2021 VMware, Inc. Free use of this software is granted under the terms of the GNU Public License (GPL).

## NOTES

- 1\.

  rostedt@goodmis.org

  mailto:rostedt@goodmis.org

- 2\.

  tz.stoyanov@gmail.com

  mailto:tz.stoyanov@gmail.com

- 3\.

  linux-trace-devel@vger.kernel.org

  mailto:linux-trace-devel@vger.kernel.org