gcc -pg -o  geturl  geturl.c

只要加上-pg选项。

然后执行 ./geturl 

会生成一个 gmon.out

 

gprof geturl | less

 

[yangbin1@vHost-RH9 src]$ gprof geturl | less
Flat profile:

Each sample counts as 0.01 seconds.
 no time accumulated

  %   cumulative   self              self     total          
 time   seconds   seconds    calls  Ts/call  Ts/call  name   
  0.00      0.00     0.00        1     0.00     0.00  contenttobuf
  0.00      0.00     0.00        1     0.00     0.00  myreg

 %         the percentage of the total running time of the
time       program used by this function.