172 lines
6.9 KiB
Markdown
172 lines
6.9 KiB
Markdown
compilation :
|
|
```gcc -g -pg -o student_rank student_rank.c heapsort.c bubblesort.c```
|
|
|
|
|
|
premier test:
|
|
```./student_rank 5 5 1```
|
|
|
|
lancement de gprof:
|
|
```gprof ./student_rank```
|
|
|
|
```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 30 0.00 0.00 bubblesort
|
|
0.00 0.00 0.00 25 0.00 0.00 find_rank_student
|
|
0.00 0.00 0.00 10 0.00 0.00 print_array
|
|
0.00 0.00 0.00 5 0.00 0.00 generate_array
|
|
0.00 0.00 0.00 2 0.00 0.00 free_array
|
|
0.00 0.00 0.00 2 0.00 0.00 print_student_array
|
|
0.00 0.00 0.00 1 0.00 0.00 generate_grades
|
|
0.00 0.00 0.00 1 0.00 0.00 generate_ranks
|
|
0.00 0.00 0.00 1 0.00 0.00 sort_students
|
|
|
|
```
|
|
|
|
30 appel de bubblesort et 25 appel de find_rank_student
|
|
|
|
call graph :
|
|
``` Call graph (explanation follows)
|
|
|
|
|
|
granularity: each sample hit covers 2 byte(s) no time propagated
|
|
|
|
index % time self children called name
|
|
0.00 0.00 5/30 sort_students [9]
|
|
0.00 0.00 25/30 find_rank_student [2]
|
|
[1] 0.0 0.00 0.00 30 bubblesort [1]
|
|
-----------------------------------------------
|
|
0.00 0.00 25/25 sort_students [9]
|
|
[2] 0.0 0.00 0.00 25 find_rank_student [2]
|
|
0.00 0.00 25/30 bubblesort [1]
|
|
-----------------------------------------------
|
|
0.00 0.00 10/10 print_student_array [6]
|
|
[3] 0.0 0.00 0.00 10 print_array [3]
|
|
-----------------------------------------------
|
|
0.00 0.00 5/5 generate_grades [7]
|
|
[4] 0.0 0.00 0.00 5 generate_array [4]
|
|
-----------------------------------------------
|
|
0.00 0.00 2/2 main [16]
|
|
[5] 0.0 0.00 0.00 2 free_array [5]
|
|
-----------------------------------------------
|
|
0.00 0.00 2/2 main [16]
|
|
[6] 0.0 0.00 0.00 2 print_student_array [6]
|
|
0.00 0.00 10/10 print_array [3]
|
|
-----------------------------------------------
|
|
0.00 0.00 1/1 main [16]
|
|
[7] 0.0 0.00 0.00 1 generate_grades [7]
|
|
0.00 0.00 5/5 generate_array [4]
|
|
-----------------------------------------------
|
|
0.00 0.00 1/1 main [16]
|
|
[8] 0.0 0.00 0.00 1 generate_ranks [8]
|
|
-----------------------------------------------
|
|
0.00 0.00 1/1 main [16]
|
|
[9] 0.0 0.00 0.00 1 sort_students [9]
|
|
0.00 0.00 25/25 find_rank_student [2]
|
|
0.00 0.00 5/30 bubblesort [1]
|
|
-----------------------------------------------
|
|
|
|
```
|
|
|
|
- 30 appel de bubblesort
|
|
- 5 appel de sort_student
|
|
- 25 appel de find_rank_student<br>
|
|
sort_student appel 25 fois find_rank_student et 5 fois bubblesort<br>
|
|
find_rank_student appel 25 fois bubblesort
|
|
|
|
nouveau scénario via la commande suivante :
|
|
```./student_rank 1000 1000 0```
|
|
|
|
lancement de gprof :
|
|
```gprof ./student_rank```
|
|
|
|
résultats:
|
|
```Flat profile:
|
|
|
|
Each sample counts as 0.01 seconds.
|
|
% cumulative self self total
|
|
time seconds seconds calls s/call s/call name
|
|
83.16 5.11 5.11 1001000 0.00 0.00 bubblesort
|
|
16.30 6.11 1.00 1000000 0.00 0.00 find_rank_student
|
|
0.65 6.15 0.04 1 0.04 6.15 sort_students
|
|
0.00 6.15 0.00 1000 0.00 0.00 generate_array
|
|
0.00 6.15 0.00 2 0.00 0.00 free_array
|
|
0.00 6.15 0.00 1 0.00 0.00 generate_grades
|
|
0.00 6.15 0.00 1 0.00 0.00 generate_ranks
|
|
|
|
```
|
|
|
|
- 1001000 appel de bubblesort
|
|
- 1000000 appel de find_rank_student<br>
|
|
execution du programme en 6.15s
|
|
|
|
call graph :
|
|
``` Call graph (explanation follows)
|
|
|
|
|
|
granularity: each sample hit covers 2 byte(s) for 0.16% of 6.15 seconds
|
|
|
|
index % time self children called name
|
|
0.04 6.11 1/1 main [2]
|
|
[1] 100.0 0.04 6.11 1 sort_students [1]
|
|
1.00 5.10 1000000/1000000 find_rank_student [3]
|
|
0.01 0.00 1000/1001000 bubblesort [4]
|
|
-----------------------------------------------
|
|
<spontaneous>
|
|
[2] 100.0 0.00 6.15 main [2]
|
|
0.04 6.11 1/1 sort_students [1]
|
|
0.00 0.00 2/2 free_array [6]
|
|
0.00 0.00 1/1 generate_grades [7]
|
|
0.00 0.00 1/1 generate_ranks [8]
|
|
-----------------------------------------------
|
|
1.00 5.10 1000000/1000000 sort_students [1]
|
|
[3] 99.3 1.00 5.10 1000000 find_rank_student [3]
|
|
5.10 0.00 1000000/1001000 bubblesort [4]
|
|
-----------------------------------------------
|
|
0.01 0.00 1000/1001000 sort_students [1]
|
|
5.10 0.00 1000000/1001000 find_rank_student [3]
|
|
[4] 83.1 5.11 0.00 1001000 bubblesort [4]
|
|
-----------------------------------------------
|
|
0.00 0.00 1000/1000 generate_grades [7]
|
|
[5] 0.0 0.00 0.00 1000 generate_array [5]
|
|
-----------------------------------------------
|
|
0.00 0.00 2/2 main [2]
|
|
[6] 0.0 0.00 0.00 2 free_array [6]
|
|
-----------------------------------------------
|
|
0.00 0.00 1/1 main [2]
|
|
[7] 0.0 0.00 0.00 1 generate_grades [7]
|
|
0.00 0.00 1000/1000 generate_array [5]
|
|
-----------------------------------------------
|
|
0.00 0.00 1/1 main [2]
|
|
[8] 0.0 0.00 0.00 1 generate_ranks [8]
|
|
-----------------------------------------------
|
|
|
|
```
|
|
|
|
## arbre d'appel du programme : ##
|
|
<pre>
|
|
main
|
|
|-->generate_grades
|
|
| |-->generate_array
|
|
|-->generate_ranks
|
|
|-->sort_students
|
|
| |-->find_rank_student
|
|
| | |-->bubblesort
|
|
| |-->bubblesort
|
|
|-->free_array
|
|
</pre>
|
|
|
|
## optimisation du programme : ##
|
|
|
|
- réduire les appel de bubblesort
|
|
- optimiser bubbesort (plus complexe)
|
|
- réduire les appel de sort_student car elle appelle les autres fonctions
|
|
|
|
### changmenent effectué : ###
|
|
suppression de la ligne 58 de student_rank.c
|
|
|
|
bubblesort.c est déjà optimisé |