profil(3) - BetterMan

profil(3)

execution time profile

distropkg manpages-dev@6.9.1-1dataset 2026-04-01T06:19:02Z+debian+ec4110e+mandoc:1.14.6-4

Synopsis

#include <unistd.h>
int profil(unsigned short *
buf
, size_t 
bufsiz
,
           size_t 
offset
, unsigned int 
scale
);
profil
():
Since glibc 2.21:
        _DEFAULT_SOURCE
    In glibc 2.19 and 2.20:
        _DEFAULT_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)
    Up to and including glibc 2.19:
        _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)

—

SYNOPSIS

bash

#include <unistd.h>

bash

int profil(unsigned short *\nbuf\n, size_t \nbufsiz\n,\n
\n           size_t \noffset\n, unsigned int \nscale\n);

profil():

bash


\n
    Since glibc 2.21:
\n
        _DEFAULT_SOURCE
\n
    In glibc 2.19 and 2.20:
\n
        _DEFAULT_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)
\n
    Up to and including glibc 2.19:
\n
        _BSD_SOURCE || (_XOPEN_SOURCE && _XOPEN_SOURCE < 500)

This routine provides a means to find out in what areas your program spends most of its time. The argument buf points to bufsiz bytes of core. Every virtual 10 milliseconds, the user's program counter (PC) is examined: offset is subtracted and the result is multiplied by scale and divided by 65536. If the resulting value is less than bufsiz, then the corresponding entry in buf is incremented. If buf is NULL, profiling is disabled.