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modif/notes.md
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138
modif/notes.md
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compilation :
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gcc -g -pg -o student_rank student_rank.c heapsort.c bubblesort.c
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premier test:
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./student_rank 5 5 1
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lancement de gprof:
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'''gprof ./student_rank'''
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'''
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Flat profile:
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Each sample counts as 0.01 seconds.
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no time accumulated
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% cumulative self self total
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time seconds seconds calls Ts/call Ts/call name
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0.00 0.00 0.00 30 0.00 0.00 bubblesort
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0.00 0.00 0.00 25 0.00 0.00 find_rank_student
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0.00 0.00 0.00 10 0.00 0.00 print_array
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0.00 0.00 0.00 5 0.00 0.00 generate_array
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0.00 0.00 0.00 2 0.00 0.00 free_array
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0.00 0.00 0.00 2 0.00 0.00 print_student_array
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0.00 0.00 0.00 1 0.00 0.00 generate_grades
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0.00 0.00 0.00 1 0.00 0.00 generate_ranks
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0.00 0.00 0.00 1 0.00 0.00 sort_students
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par exemple on peut voir que la fonction bubblesort a été appelée 30 fois et que la fonction find_rank_student a été appelée 25 fois.
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exemple du call graph :
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Call graph (explanation follows)
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granularity: each sample hit covers 2 byte(s) no time propagated
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index % time self children called name
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0.00 0.00 5/30 sort_students [9]
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0.00 0.00 25/30 find_rank_student [2]
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[1] 0.0 0.00 0.00 30 bubblesort [1]
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-----------------------------------------------
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0.00 0.00 25/25 sort_students [9]
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[2] 0.0 0.00 0.00 25 find_rank_student [2]
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0.00 0.00 25/30 bubblesort [1]
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-----------------------------------------------
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0.00 0.00 10/10 print_student_array [6]
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[3] 0.0 0.00 0.00 10 print_array [3]
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-----------------------------------------------
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0.00 0.00 5/5 generate_grades [7]
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[4] 0.0 0.00 0.00 5 generate_array [4]
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-----------------------------------------------
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0.00 0.00 2/2 main [16]
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[5] 0.0 0.00 0.00 2 free_array [5]
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-----------------------------------------------
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0.00 0.00 2/2 main [16]
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[6] 0.0 0.00 0.00 2 print_student_array [6]
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0.00 0.00 10/10 print_array [3]
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-----------------------------------------------
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0.00 0.00 1/1 main [16]
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[7] 0.0 0.00 0.00 1 generate_grades [7]
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0.00 0.00 5/5 generate_array [4]
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-----------------------------------------------
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0.00 0.00 1/1 main [16]
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[8] 0.0 0.00 0.00 1 generate_ranks [8]
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-----------------------------------------------
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0.00 0.00 1/1 main [16]
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[9] 0.0 0.00 0.00 1 sort_students [9]
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0.00 0.00 25/25 find_rank_student [2]
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0.00 0.00 5/30 bubblesort [1]
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-----------------------------------------------
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'''
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par exemple on peut voir que la fonction bubblesort a été appelée 30 fois, 5 fois par la fonction sort_students et 25 fois par la fonction find_rank_student.
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la fonction find_rank_student a été appelée 25 fois par sort_students et à chaque fois elle appelle la fonction bubblesort.
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on a relancé le scénario en changeant les paramètres de la commande :
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./student_rank 1000 1000 0
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on a relancé gprof avec la commande suivante :
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gprof ./student_rank
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un apperçu du résultat est donné ci-dessous :
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Flat profile:
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Each sample counts as 0.01 seconds.
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% cumulative self self total
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time seconds seconds calls s/call s/call name
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83.16 5.11 5.11 1001000 0.00 0.00 bubblesort
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16.30 6.11 1.00 1000000 0.00 0.00 find_rank_student
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0.65 6.15 0.04 1 0.04 6.15 sort_students
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0.00 6.15 0.00 1000 0.00 0.00 generate_array
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0.00 6.15 0.00 2 0.00 0.00 free_array
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0.00 6.15 0.00 1 0.00 0.00 generate_grades
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0.00 6.15 0.00 1 0.00 0.00 generate_ranks
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en comparaison avec le premier scénario, on peut voir que la fonction bubblesort a été appelée 1001000 fois et que la fonction find_rank_student a été appelée 1000000 fois.
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on peut voir aussi que le programme a passé 6.15 secondes à exécuter alors que dans le premier scénario il n'a pas accumulé de temps.
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exemple du call graph :
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Call graph (explanation follows)
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granularity: each sample hit covers 2 byte(s) for 0.16% of 6.15 seconds
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index % time self children called name
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0.04 6.11 1/1 main [2]
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[1] 100.0 0.04 6.11 1 sort_students [1]
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1.00 5.10 1000000/1000000 find_rank_student [3]
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0.01 0.00 1000/1001000 bubblesort [4]
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-----------------------------------------------
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<spontaneous>
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[2] 100.0 0.00 6.15 main [2]
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0.04 6.11 1/1 sort_students [1]
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0.00 0.00 2/2 free_array [6]
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0.00 0.00 1/1 generate_grades [7]
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0.00 0.00 1/1 generate_ranks [8]
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-----------------------------------------------
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1.00 5.10 1000000/1000000 sort_students [1]
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[3] 99.3 1.00 5.10 1000000 find_rank_student [3]
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5.10 0.00 1000000/1001000 bubblesort [4]
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-----------------------------------------------
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0.01 0.00 1000/1001000 sort_students [1]
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5.10 0.00 1000000/1001000 find_rank_student [3]
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[4] 83.1 5.11 0.00 1001000 bubblesort [4]
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-----------------------------------------------
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0.00 0.00 1000/1000 generate_grades [7]
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[5] 0.0 0.00 0.00 1000 generate_array [5]
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-----------------------------------------------
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0.00 0.00 2/2 main [2]
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[6] 0.0 0.00 0.00 2 free_array [6]
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-----------------------------------------------
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0.00 0.00 1/1 main [2]
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[7] 0.0 0.00 0.00 1 generate_grades [7]
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0.00 0.00 1000/1000 generate_array [5]
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-----------------------------------------------
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0.00 0.00 1/1 main [2]
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[8] 0.0 0.00 0.00 1 generate_ranks [8]
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-----------------------------------------------
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BIN
student_rank.exe
Normal file
BIN
student_rank.exe
Normal file
Binary file not shown.
272
test.txt
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272
test.txt
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@ -0,0 +1,272 @@
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Flat profile:
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Each sample counts as 0.01 seconds.
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% cumulative self self total
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time seconds seconds calls Ts/call Ts/call name
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% the percentage of the total running time of the
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time program used by this function.
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cumulative a running sum of the number of seconds accounted
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seconds for by this function and those listed above it.
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self the number of seconds accounted for by this
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seconds function alone. This is the major sort for this
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listing.
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calls the number of times this function was invoked, if
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this function is profiled, else blank.
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self the average number of milliseconds spent in this
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ms/call function per call, if this function is profiled,
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else blank.
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total the average number of milliseconds spent in this
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ms/call function and its descendents per call, if this
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function is profiled, else blank.
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name the name of the function. This is the minor sort
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for this listing. The index shows the location of
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the function in the gprof listing. If the index is
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in parenthesis it shows where it would appear in
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the gprof listing if it were to be printed.
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Copyright (C) 2012-2023 Free Software Foundation, Inc.
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Copying and distribution of this file, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved.
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Call graph (explanation follows)
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granularity: each sample hit covers 4 byte(s) no time propagated
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index % time self children called name
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This table describes the call tree of the program, and was sorted by
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the total amount of time spent in each function and its children.
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Each entry in this table consists of several lines. The line with the
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index number at the left hand margin lists the current function.
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The lines above it list the functions that called this function,
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and the lines below it list the functions this one called.
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This line lists:
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index A unique number given to each element of the table.
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Index numbers are sorted numerically.
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The index number is printed next to every function name so
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it is easier to look up where the function is in the table.
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% time This is the percentage of the `total' time that was spent
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in this function and its children. Note that due to
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different viewpoints, functions excluded by options, etc,
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these numbers will NOT add up to 100%.
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self This is the total amount of time spent in this function.
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children This is the total amount of time propagated into this
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function by its children.
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called This is the number of times the function was called.
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If the function called itself recursively, the number
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only includes non-recursive calls, and is followed by
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a `+' and the number of recursive calls.
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name The name of the current function. The index number is
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printed after it. If the function is a member of a
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cycle, the cycle number is printed between the
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function's name and the index number.
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For the function's parents, the fields have the following meanings:
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self This is the amount of time that was propagated directly
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from the function into this parent.
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children This is the amount of time that was propagated from
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the function's children into this parent.
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called This is the number of times this parent called the
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function `/' the total number of times the function
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was called. Recursive calls to the function are not
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included in the number after the `/'.
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name This is the name of the parent. The parent's index
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number is printed after it. If the parent is a
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member of a cycle, the cycle number is printed between
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the name and the index number.
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If the parents of the function cannot be determined, the word
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`<spontaneous>' is printed in the `name' field, and all the other
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fields are blank.
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For the function's children, the fields have the following meanings:
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self This is the amount of time that was propagated directly
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from the child into the function.
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children This is the amount of time that was propagated from the
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child's children to the function.
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called This is the number of times the function called
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this child `/' the total number of times the child
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was called. Recursive calls by the child are not
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listed in the number after the `/'.
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name This is the name of the child. The child's index
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number is printed after it. If the child is a
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member of a cycle, the cycle number is printed
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between the name and the index number.
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If there are any cycles (circles) in the call graph, there is an
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entry for the cycle-as-a-whole. This entry shows who called the
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cycle (as parents) and the members of the cycle (as children.)
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The `+' recursive calls entry shows the number of function calls that
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were internal to the cycle, and the calls entry for each member shows,
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for that member, how many times it was called from other members of
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the cycle.
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Copyright (C) 2012-2023 Free Software Foundation, Inc.
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Copying and distribution of this file, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved.
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Index by function name
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Flat profile:
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Each sample counts as 0.01 seconds.
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% cumulative self self total
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time seconds seconds calls Ts/call Ts/call name
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% the percentage of the total running time of the
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time program used by this function.
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cumulative a running sum of the number of seconds accounted
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seconds for by this function and those listed above it.
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self the number of seconds accounted for by this
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seconds function alone. This is the major sort for this
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listing.
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calls the number of times this function was invoked, if
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this function is profiled, else blank.
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self the average number of milliseconds spent in this
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ms/call function per call, if this function is profiled,
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else blank.
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total the average number of milliseconds spent in this
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ms/call function and its descendents per call, if this
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function is profiled, else blank.
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name the name of the function. This is the minor sort
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for this listing. The index shows the location of
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the function in the gprof listing. If the index is
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in parenthesis it shows where it would appear in
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the gprof listing if it were to be printed.
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Copyright (C) 2012-2023 Free Software Foundation, Inc.
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Copying and distribution of this file, with or without modification,
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are permitted in any medium without royalty provided the copyright
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notice and this notice are preserved.
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Call graph (explanation follows)
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granularity: each sample hit covers 4 byte(s) no time propagated
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index % time self children called name
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This table describes the call tree of the program, and was sorted by
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the total amount of time spent in each function and its children.
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Each entry in this table consists of several lines. The line with the
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index number at the left hand margin lists the current function.
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The lines above it list the functions that called this function,
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and the lines below it list the functions this one called.
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This line lists:
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index A unique number given to each element of the table.
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Index numbers are sorted numerically.
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The index number is printed next to every function name so
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it is easier to look up where the function is in the table.
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% time This is the percentage of the `total' time that was spent
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in this function and its children. Note that due to
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different viewpoints, functions excluded by options, etc,
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these numbers will NOT add up to 100%.
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self This is the total amount of time spent in this function.
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children This is the total amount of time propagated into this
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function by its children.
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called This is the number of times the function was called.
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If the function called itself recursively, the number
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only includes non-recursive calls, and is followed by
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a `+' and the number of recursive calls.
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name The name of the current function. The index number is
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printed after it. If the function is a member of a
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cycle, the cycle number is printed between the
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function's name and the index number.
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For the function's parents, the fields have the following meanings:
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self This is the amount of time that was propagated directly
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from the function into this parent.
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children This is the amount of time that was propagated from
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the function's children into this parent.
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called This is the number of times this parent called the
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function `/' the total number of times the function
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was called. Recursive calls to the function are not
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included in the number after the `/'.
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name This is the name of the parent. The parent's index
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number is printed after it. If the parent is a
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member of a cycle, the cycle number is printed between
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the name and the index number.
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If the parents of the function cannot be determined, the word
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`<spontaneous>' is printed in the `name' field, and all the other
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fields are blank.
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|
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For the function's children, the fields have the following meanings:
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self This is the amount of time that was propagated directly
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from the child into the function.
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children This is the amount of time that was propagated from the
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child's children to the function.
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|
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called This is the number of times the function called
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this child `/' the total number of times the child
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was called. Recursive calls by the child are not
|
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listed in the number after the `/'.
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|
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name This is the name of the child. The child's index
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number is printed after it. If the child is a
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member of a cycle, the cycle number is printed
|
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between the name and the index number.
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|
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If there are any cycles (circles) in the call graph, there is an
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entry for the cycle-as-a-whole. This entry shows who called the
|
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cycle (as parents) and the members of the cycle (as children.)
|
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The `+' recursive calls entry shows the number of function calls that
|
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were internal to the cycle, and the calls entry for each member shows,
|
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for that member, how many times it was called from other members of
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the cycle.
|
||||
|
||||
Copyright (C) 2012-2023 Free Software Foundation, Inc.
|
||||
|
||||
Copying and distribution of this file, with or without modification,
|
||||
are permitted in any medium without royalty provided the copyright
|
||||
notice and this notice are preserved.
|
||||
|
||||
Index by function name
|
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|
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Loading…
Reference in New Issue
Block a user