Re: [Valgrind-users] callgrind.out file size is zero
On 18/10/2022 14:54, Mahin Pandya wrote: Hi All, I am tying to use Valgrind to generate code profiling, generated callgrind.out.2199511 file is of zero size. After enabling the debug log below message is displayed: ... SB 2759 (evchecks 30598) [tid 1] 0x415b170 execve /usr/lib/x86_64-linux-gnu/libc-2.31.so+0xe3170 --1314389:1: syswrap Exec of /devsrc/wineinst/bin/wine64-preloader --1314389:1: gdbsrv remote_finish (reason orderly_finish) 1030 -1 --1314389:1: gdbsrv 1314389 (creator 1314389) maybe unlinking ... Any idea why it does not generate profiling data? I am new to Valgrind, so not sure may have missed obvious things. Any pointers/suggestion are welcome. Thanking you. regards, Mahin Hi My guess is that your process is doing a fork/exec (or maybe just an exec). Try with --trace-children=yes I'd also recommend that you start with --tool=none before moving on to callgrind. A+ Paul ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
Re: [Valgrind-users] callgrind.out file size is zero
As a wild guess: looks like your application is doing fork and exec.
You might try to add then --trace-children=yes
(and possibly if needed you should use --trace-children-skip=.. if tracing
all children is too much).
Otherwise, try first with a very simple standalone program
e.g. something like:
for (int i = 0; i < 1000; i++)
printf ("hello world %d\n", i);
see if that works, and compare the debug trace of the very simple working
case with the more complex non working case.
Philippe
On Tue, 2022-10-18 at 12:54 +, Mahin Pandya wrote:
> Hi All,
>
> I am tying to use Valgrind to generate code profiling, generated
> callgrind.out.2199511
> file is of zero size. After enabling the debug log below message is displayed:
>
> ...
> SB 2759 (evchecks 30598) [tid 1] 0x415b170 execve
> /usr/lib/x86_64-linux-gnu/libc-
> 2.31.so+0xe3170
> --1314389:1: syswrap Exec of /devsrc/wineinst/bin/wine64-preloader
> --1314389:1: gdbsrv remote_finish (reason orderly_finish) 1030 -1
> --1314389:1: gdbsrv 1314389 (creator 1314389) maybe unlinking
> ...
>
> Any idea why it does not generate profiling data? I am new to Valgrind, so
> not sure may
> have missed obvious things. Any pointers/suggestion are welcome.
> Thanking you.
>
> regards,
> Mahin
>
> ___
> Valgrind-users mailing list
> Valgrind-users@lists.sourceforge.net
> https://lists.sourceforge.net/lists/listinfo/valgrind-users
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[Valgrind-users] callgrind.out file size is zero
Hi All, I am tying to use Valgrind to generate code profiling, generated callgrind.out.2199511 file is of zero size. After enabling the debug log below message is displayed: ... SB 2759 (evchecks 30598) [tid 1] 0x415b170 execve /usr/lib/x86_64-linux-gnu/libc-2.31.so+0xe3170 --1314389:1: syswrap Exec of /devsrc/wineinst/bin/wine64-preloader --1314389:1: gdbsrv remote_finish (reason orderly_finish) 1030 -1 --1314389:1: gdbsrv 1314389 (creator 1314389) maybe unlinking ... Any idea why it does not generate profiling data? I am new to Valgrind, so not sure may have missed obvious things. Any pointers/suggestion are welcome. Thanking you. regards, Mahin ___ Valgrind-users mailing list Valgrind-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/valgrind-users
