tep_get_cpus - Man Page

Get / set the number of CPUs, which have a tracing buffer representing it. Note, the buffer may be empty.

Synopsis

#include <event-parse.h>

int tep_get_cpus(struct tep_handle *tep);
void tep_set_cpus(struct tep_handle *tep, int cpus);

Description

The tep_get_cpus() function gets the number of CPUs, which have a tracing buffer representing it. The tep argument is trace event parser context.

The tep_set_cpus() function sets the number of CPUs, which have a tracing buffer representing it. The tep argument is trace event parser context. The cpu argument is the number of CPUs with tracing data.

Return Value

The tep_get_cpus() functions returns the number of CPUs, which have tracing data recorded.

Example

#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
        tep_set_cpus(tep, 5);
...
        printf("We have tracing data for %d CPUs", tep_get_cpus(tep));

Files

event-parse.h
        Header file to include in order to have access to the library APIs.
-ltraceevent
        Linker switch to add when building a program that uses the library.

See Also

libtraceevent(3), trace-cmd(1)

Author

Steven Rostedt <rostedt@goodmis.org[1]>, author of libtraceevent.
Tzvetomir Stoyanov <tz.stoyanov@gmail.com[2]>, author of this man page.

Reporting Bugs

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

License

libtraceevent is Free Software licensed under the GNU LGPL 2.1

Resources

https://git.kernel.org/pub/scm/libs/libtrace/libtraceevent.git/

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

Referenced By

The man page tep_set_cpus(3) is an alias of tep_get_cpus(3).

02/08/2021 libtraceevent 1.1.1 libtraceevent Manual