Re: [PATCH 3/4] perf tools: Add call-graph option support into.perfconfig

From: Jiri Olsa
Date: Tue Oct 29 2013 - 06:19:05 EST


On Mon, Oct 28, 2013 at 05:10:54PM +0900, Namhyung Kim wrote:
> On Sat, 26 Oct 2013 16:25:35 +0200, Jiri Olsa wrote:
> > Adding call-graph option support into .perfconfig file,
> > so it's now possible use call-graph option like:
> >
> > [top]
> > call-graph = fp
> >
> > [record]
> > call-graph = dwarf,8192
> >
> > Above options ONLY setup the unwind method. To enable
> > perf record/top to actually use it the command line
> > option -g/-G must be specified.
> >
> > The --call-graph option overloads .perfconfig setup.
> >
> > Assuming above configuration:
> >
> > $ perf record -g ls
> > - enables dwarf unwind with user stack size dump 8192 bytes
> >
> > $ perf top -G
> > - enables frame pointer unwind
> >
> > $ perf record --call-graph=fp ls
> > - enables frame pointer unwind
> >
> > $ perf top --call-graph=dwarf,4096 ls
> > - enables dwarf unwind with user stack size dump 4096 bytes
> >
> [SNIP]
> > --- a/tools/perf/builtin-record.c
> > +++ b/tools/perf/builtin-record.c
> > @@ -750,6 +750,8 @@ int record_parse_callchain_opt(const struct option *opt,
> > struct perf_record_opts *opts = opt->value;
> > int ret;
> >
> > + opts->call_graph_enabled = !unset;
> > +
>
> Why not just using symbol_conf.use_callchain?
>

right, this way we'd be in sync with top

jirka
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