Hello
from what i understand, gprof is not just about timing.. its just one aspect
of it... its more about how many times a function is called and from where
is is called..[call graphs], its very useful in analysing and verifying your
program
for complete reference
The GNU Profiler by Jay Fenlason and Richard Stallman (
http://www.cs.utah.edu/dept/old/texinfo/as/gprof_toc.html)
Gowthaman B
PS: you can run gprof with -b option it skips all the explanation...
On Thu, Mar 13, 2008 at 7:51 AM, Girish Venkatachalam <
girishvenkatachalam@xxxxxxxxx> wrote:
On 00:00:40 Mar 13, Logu wrote:
I am trying to profile a simple C program, but I am not getting correctthe
values under the "cumulative seconds" and "self seconds" column for
functions. I always get them as 0.00.gprof
I compiled and linked the program with -pg option. But when I run the
I only get this output
% cumulative self self total
time seconds seconds calls Ts/call Ts/call name
0.00 0.00 0.00 5 0.00 0.00 pmesg
Could someone point me what I am missing here. I need to find the time
spent on each function calls.
I barely remember using gprof.
I have found the simple shell command time(1) to be far more easier to
use and helpful.
I remember gprof reporting huge amounts of data. How did you get just
one line?
There are plenty of profiling/monitoring tools in linux.
Why don't you try the other ones?
lsof(1), fstat(1) and so on.
I think you can simply
$ time ./a.out
for your immediate need.
As to why gprof results weird results, the answer might be far deeper
than what meets the eye.
As someone suggested you can try a few iterations.
-Girish
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