Re: [RFC/PATCH v2] perf report: Show random usage tip on the help line

[Namhyung Kim <namhyung@kernel.org>]

On Thu, Jan 07, 2016 at 09:07:17AM +0100, Jiri Olsa wrote:
> On Thu, Jan 07, 2016 at 04:46:22PM +0900, Namhyung Kim wrote:
> 
> SNIP
> 
> >  
> >  struct callchain_param	callchain_param = {
> >  	.mode	= CHAIN_GRAPH_ABS,
> > @@ -663,3 +665,28 @@ fetch_kernel_version(unsigned int *puint, char *str,
> >  		*puint = (version << 16) + (patchlevel << 8) + sublevel;
> >  	return 0;
> >  }
> > +
> > +const char *perf_report_tip(const char *dirname)
> > +{
> > +	struct strlist *tips;
> > +	struct str_node *node;
> > +	char *tip = NULL;
> > +	struct strlist_config conf = {
> > +		.dirname = system_path(dirname) ,
> > +	};
> > +
> > +	tips = strlist__new("tips.txt", &conf);
> > +	if (tips == NULL || strlist__nr_entries(tips) == 1) {
> > +		tip = (char *)"Cannot find tips.txt file";
> > +		goto out;
> 
> could we also try to read "./Documentation/tips.txt" ?
> 
> so people who don't install perf and run it from 'tools/perf'
> get some tips as well? ;-)

I thought about that too.  But using relative path is not a good idea
IMHO since there's no guarantee we're in the perf source directory.
Maybe we can path $srcdir or so, but given that only *very* few people
like you will need it, I'd rather not doing that. :)

Thanks,
Namhyung


> 
> [jolsa@krava perf]$ ./perf report --stdio  | tail -3
> #
> # (Cannot find tips.txt file)
> #
> [jolsa@krava perf]$ 
> 
> thanks,
> jirka