4.4BSD/usr/share/man/cat3/monstartup.0

MONCONTROL(3)               BSD Programmer's Manual              MONCONTROL(3)

NNAAMMEE
     mmoonnccoonnttrrooll, mmoonnssttaarrttuupp - control execution profile

SSYYNNOOPPSSIISS
     mmoonnccoonnttrrooll(_i_n_t _m_o_d_e);

     mmoonnssttaarrttuupp(_u___l_o_n_g _*_l_o_w_p_c, _u___l_o_n_g _*_h_i_g_h_p_c);

DDEESSCCRRIIPPTTIIOONN
     An executable program compiled using the --ppgg option to cc(1) automatical-
     ly includes calls to collect statistics for the gprof(1) call-graph exe-
     cution profiler.  In typical operation, profiling begins at program
     startup and ends when the program calls exit.  When the program exits,
     the profiling data are written to the file _g_m_o_n_._o_u_t, then gprof(1) can be
     used to examine the results.

     mmoonnccoonnttrrooll() selectively controls profiling within a program.  When the
     program starts, profiling begins.  To stop the collection of histogram
     ticks and call counts use mmoonnccoonnttrrooll(_0); to resume the collection of his-
     togram ticks and call counts use mmoonnccoonnttrrooll(_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 mmoonnccoonnttrrooll().

     Programs that are not loaded with --ppgg may selectively collect profiling
     statistics by calling mmoonnssttaarrttuupp() with the range of addresses to be pro-
     filed.  _l_o_w_p_c and _h_i_g_h_p_c specify the address range that is to be sampled;
     the lowest address sampled is that of _l_o_w_p_c and the highest is just below
     _h_i_g_h_p_c. Only functions in that range that have been compiled with the --ppgg
     option to cc(1) will appear in the call graph part of the output; howev-
     er, all functions in that address range will have their execution time
     measured.  Profiling begins on return from mmoonnssttaarrttuupp().

FFIILLEESS
     gmon.out  execution data file

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

4th Berkeley Distribution        June 4, 1993                                1