Hi Lyle! sorry that i write about this again , but i have a question, according to gprof man page , when i compile the source file , i will receveid two file one a.out and other gmon.out. from gprof man page: The profile data is taken from the call graph profile file (gmon.out default) which is created by programs that are compiled with the -pg option of "cc", "pc", and "f77". but when i run g++ -pg test.C , only a.out are creat. How i can creat the gmon.out? i need to write this? thank you , Marcelo On Wed, 16 Jun 2004 lrtaylor@xxxxxxxxxx wrote: >Look at the -p and -pg arguments to gcc/g++. However, you'll also need >to look at prof or gprof, because you'll need one of those programs to >analyze the profiling data. > >Thanks, >Lyle > > Minha vida foi uma sucessao de acasos felizes criminalista e imortal Evandro Lins e Silva