libcallperf

Library for using the linux 'perf stat' command within an isolated portion of a program

Usage:

int libcallperf_start(char *what)

Start a measure with the perf stat command. 'what' is an extra parameter for the perf command, or NULL if none special. It returns 0 in case of success.

struct libcallperf_report_s *libcallperf_stop(void)

Stop the measure and returns a measure report. Or NULL in case of failure.

double libcallperf_get (const struct libcallperf_report_s *report, const char name[])

Get the value associated to the name 'name' in the report and return it. Return NAN if the name is not present in the report.

void libcallperf_print (FILE *stream, const struct libcallperf_report_s *report)

Print all the report on the given stream.

void libcallperf_free (struct libcallperf_report_s *report);

Free the report.

Example

See test.c

Limitation:

• Not precise enought for small measure.
• Not for production.