Manual Reference Pages - CGPROF (1)
cgprof - generate colored call graph for profiled executables
cgprof [-h] [-T dev] [-g gmon_data] [gprof_file]
cgprof generate a function calling graph for a profiled executable. The
executable must have been compiled and linked to output data suitable for
gprof(1) (look at -pg option of gcc(1)). If no -T option is given,
output is dot(1) commands. All the results are printed on standard
output. cgprof takes gprof_file as input, or standard input.
The result is a directed acyclic graph (DAG), where nodes represent
functions traversed during the program execution, and edges function
calls (arrow is from the caller to the called).
Node colors represent the cumulative execution time spent by a
function and its children. Colors range from intense red (100 % time) to
pale violet (0 %), like a rainbow. A node is white filled when it has
no time execution data available, which may be the case for profiling
functions or not instrumented functions.
cgprof helps to have a better understanding of program structure and
execution. It makes hot spots identification visual and intuitive,
and provides a minimum code coverage function.
Display this help text.
This option sets the output format to dev. Possible values of
dev are :
X11 output, with direct previewing using dotty(1).
Postscript output, using dot(1) processor. The drawing will be
sized to fill one landscape page.
to print a report from execution of test_hash, run the following
$ cc -pg -o test_hash test_hash.c
$ test_hash < test_data
$ gprof test_hash | cgprof -Tps | lpr
gprof(1), dot(1), dotty(1), cc(1).
cgprof is inspired by a gprof2dot, a similar tool from AT&T Research Labs,
distributed part of graphviz (http://www.graphviz.org) which includes
also dot tools.
Marc Vertes <email@example.com>
|cgprof-1.2 ||CGPROF (1) ||December 16, 2004 |
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