104 - Code Analysis with Ftrace

$ cd ../104

$ ncc -ftrace ftrace.c

$ a.out

$ ls

https://gyazo.com/bacb05a01fe46814c86c02a17c179c15

$ cat -n ftrace.c

code:ftrace.c

10 #define N 200 * (1 << 20)

12 double get_dtime() {

16 }

21 void vec_ok() {

22 int i;

23 for(i = 0; i < N; i++) {

24 ai = bi;

25 }

26 }

28 void vec_ng() {

29 int i;

30 for(i = 1; i < N; i++) {

31 ai = ai-1;

32 }

33 }

$ ftrace -f ftrace.out

https://gyazo.com/5072546fb8f9b5bdcfbc1cfdb368009d