Unable to view complete output from gprof profiler
In spite of compiling my code with -pg flag set, I am unable to view the complete details of the gprof output from gmon.out
Specifically, I am not getting the details of calls , self Ts/call and total Ts/call .
This is the output of gprof deepflow-static gmon.out :
Flat profile:
Each sample counts as 0.01 seconds.
% cumulative self self total
time seconds seconds calls Ts/call Ts/call name
52.72 7.18 7.18 sor_coupled
34.07 11.82 4.64 compute_data_and_match
2.28 12.13 0.31 convolve_vert
2.28 12.44 0.31 compute_smoothness
2.06 12.72 0.28 convolve_horiz
1.47 12.92 0.20 color_image_resize_vert
1.03 13.06 0.14 sub_laplacian
0.88 13.18 0.12 image_resize_vert
0.88 13.30 0.12 image_warp
0.73 13.40 0.10 color_image_resize_horiz
0.59 13.48 0.08 image_resize_horiz
0.18 13.51 0.03 frexp
0.15 13.53 0.02 compute_one_level
0.15 13.55 0.02 fwrite
0.15 13.57 0.02 memcpy
0.11 13.58 0.02 __floorf_sse41
0.07 13.59 0.01 brk
0.07 13.60 0.01 color_image_png_load
0.07 13.61 0.01 get_derivatives
0.07 13.62 0.01 png_read_filter_row_paeth_multibyte_pixel
% the percentage of the total running time of the
time program used by this function.
cumulative a running sum of the number of seconds accounted
seconds for by this function and those listed above it.
self the number of seconds accounted for by this
seconds function alone. This is the major sort for this
listing.
calls the number of times this function was invoked, if
this function is profiled, else blank.
self the average number of milliseconds spent in this
ms/call function per call, if this function is profiled,
else blank.
total the average number of milliseconds spent in this
ms/call function and its descendents per call, if this
function is profiled, else blank.
name the name of the function. This is the minor sort
for this listing. The index shows the location of
the function in the gprof listing. If the index is
in parenthesis it shows where it would appear in
the gprof listing if it were to be printed.
Copyright (C) 2012 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.
This is my Makefile :
CC=gcc
CFLAGS=-Wall -g -O3
LDFLAGS=-g -Wall -O3
LIBFLAGS=-lm -ljpeg -lpng -pg
LIBAFLAGS=-static /usr/lib/x86_64-linux-gnu/libjpeg.a /usr/local/lib/libpng16.a /usr/lib/x86_64-linux-gnu/libz.a /usr/lib/x86_64-linux-gnu/libm.a
all: deepflow-static
deepflow: deepflow.o image.o io.o opticalflow_aux.o opticalflow.o solver.o
$(CC) $(LDFLAGS) $(LIBFLAGS) -o $@ $^
deepflow-static: deepflow.o image.o io.o opticalflow_aux.o opticalflow.o solver.o
$(CC) $(LIBFLAGS) -o $@ $^ $(LIBAFLAGS)
%.o: %.c
$(CC) -o $@ $(CFLAGS) -c $+
clean:
rm -f *.o deepflow
Please help me in figuring out what is missing. Thanks in advance
This has happened to me when the application being run with gprof was not terminating successfully.
The generation of the analysis file could not complete as the information was not fully written to gmon.out.
Try exiting the program after a few lines with:
exit(EXIT_SUCCESS);
And check whether or not the file is correctly generated.
You can also run the program through gdb .
I am not a Makefile expert, but you should be using the -pg flag on two steps:
GPROF=-pg
all: $(SOURCES) $(EXECUTABLE)
$(EXECUTABLE): $(OBJECTS)
$(CC) $(LDFLAGS) $(OBJECTS) -o $@ $(LIBS) $(GPROF)
.cpp.o:
$(CC) $(CPPFLAGS) $(CFLAGS) $< -o $@ $(GPROF)
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