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MONCONTROL(3) Library Functions Manual MONCONTROL(3)

moncontrolcontrol execution profile

#include <sys/gmon.h>

void
moncontrol(int mode);

An executable program compiled using the -pg option to cc(1) automatically includes calls to collect statistics for the gprof(1) call-graph execution profiler. Profiling begins at program startup and ends when the program calls exit. When the program exits, the profiling data are written to the file , then gprof(1) can be used to examine the results.

() selectively controls profiling within a program. When the program starts, profiling begins. To stop the collection of histogram ticks and call counts use moncontrol(0); to resume the collection of histogram ticks and call counts use moncontrol(1). This feature allows the cost of particular operations to be measured. Note that an output file will be produced on program exit regardless of the state of moncontrol().

gmon.progname.pid.out
execution data file

cc(1), gprof(1), profil(2)

May 24, 2025 OpenBSD-current