gprof.info: How do I?
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Answers to Common Questions
How do I find which lines in my program were executed the most times?
Compile your program with basic-block counting enabled, run it,
then use the following pipeline:
gprof -l -C OBJFILE | sort -k 3 -n -r
This listing will show you the lines in your code executed most
often, but not necessarily those that consumed the most time.
How do I find which lines in my program called a particular function?
Use `gprof -l' and lookup the function in the call graph. The
callers will be broken down by function and line number.
How do I analyze a program that runs for less than a second?
Try using a shell script like this one:
for i in `seq 1 100`; do
fastprog
mv gmon.out gmon.out.$i
done
gprof -s fastprog gmon.out.*
gprof fastprog gmon.sum
If your program is completely deterministic, all the call counts
will be simple multiples of 100 (i.e. a function called once in
each run will appear with a call count of 100).
Created Wed Sep 1 16:42:32 2004 on bee with info_to_html version 0.9.6.