line-by-line profiling

[Jan Hubicka]

> >>>>> "Jan" == Jan Hubicka <jh@suse.cz> writes:
> 
>     >> How do I get line-by-line profiling to work?  I'm using gcc-3.2 linux
>     >> binutils-2.13.90.0.2-2.
>     >> 
>     >> The instructions in gprof say to turn on basic block profiling using
>     >> gcc -a.  Apparantly this flag is obsolete?  I'm guessing it should be
>     >> -fprofile-arcs?
>     >> 
>     >> Compiling with g++ -pg -g -mcpu=athlon-xp -march=athlon-xp -O6
>     >> -ffast-math -fprofile-arcs, then running 
>     >> 
>     >> gprof -l  exechns27 > prof
>     >> 
>     >> The results I get don't seem to make sense.  What am I doing wrong?
> 
>     Jan> Compiling with g++ -mcpu=athlon-xp -march=athlon-xp -O6 -ftest-coverage
>     Jan> -ffast-math -fprofile-arcs, then running 
> 
>     Jan> gcov source.c
> 
> Any way to get line-by-line timing info?  I see only how to get
> execution count from gcov, I'm really looking for profile of execution
> time.
Only way to get estimate of this is oprofile.

Honza