On Thu, Jun 29, 2017 at 05:22:52PM +0200, Jiri Olsa wrote:
> > > --- a/tools/perf/util/sort.c
> > > +++ b/tools/perf/util/sort.c
> > > @@ -2635,6 +2635,9 @@ static char *setup_overhead(char *keys)
> > >  	if (sort__mode == SORT_MODE__DIFF)
> > >  		return keys;
> > >  
> > > +	if (strstr(keys, "overhead"))
> > > +		return keys;
> > > +
> 
> ah ok, I think it's right.. basically you're forcing
> precedence of the -s option over the --children option
> 
> you could have your example working by running:
>   $ perf report -s overhead,sym --no-children
> 
Thanks for the knowledge.

> please state something like:
> 
> /*
>  * User already stated overhead within -s option,
>  * do not mangle with that.
>  */
> 
I'll add this as comment around the change for v3.

> thanks,
> jirka

-- 
Thanks,
Changbin Du