linux-kernel - Re: [PATCH 17/21] perf, c2c: Add symbol count table

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Date:	Tue, 18 Feb 2014 21:56:52 -0500
From:	Don Zickus <dzickus@...hat.com>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	acme@...stprotocols.net, LKML <linux-kernel@...r.kernel.org>,
	jmario@...hat.com, fowles@...each.com, eranian@...gle.com
Subject: Re: [PATCH 17/21] perf, c2c: Add symbol count table

On Tue, Feb 18, 2014 at 02:09:29PM +0100, Jiri Olsa wrote:
> On Mon, Feb 10, 2014 at 12:29:12PM -0500, Don Zickus wrote:
> > Just another table that displays the referenced symbols in the analysis
> > report.  The table lists the most frequently used symbols first.
> > 
> > It is just another way to look at similar data to figure out who
> > is causing the most contention (based on the workload used).
> > 
> > Originally done by Dick Fowles and ported by me.
> > 
> > Suggested-by: Joe Mario <jmario@...hat.com>
> > Original-by: Dick Fowles <rfowles@...hat.com>
> > Signed-off-by: Don Zickus <dzickus@...hat.com>
> > ---
> >  tools/perf/builtin-c2c.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++++
> >  1 file changed, 99 insertions(+)
> > 
> > diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
> > index 32c2319..979187f 100644
> > --- a/tools/perf/builtin-c2c.c
> > +++ b/tools/perf/builtin-c2c.c
> > @@ -950,6 +950,104 @@ static void c2c_hit__update_stats(struct c2c_stats *new,
> >  	new->total_period	+= old->total_period;
> >  }
> >  
> > +LIST_HEAD(ref_tree);
> > +LIST_HEAD(ref_tree_sorted);
> > +struct refs {
> > +	struct list_head	list;
> > +	int			nr;
> > +	const char		*name;
> > +	char			*long_name;
> > +};
> > +
> > +static int update_ref_tree(struct c2c_entry *entry)
> > +{
> > +	struct refs *p;
> > +	struct dso *dso = entry->mi->iaddr.map->dso;
> > +	const char *name = dso->short_name;
> > +
> > +	list_for_each_entry(p, &ref_tree, list) {
> > +		if (!strcmp(p->name, name))
> > +			goto found;
> > +	}
> > +
> > +	p = zalloc(sizeof(struct refs));
> > +	if (!p)
> > +		return -1;
> > +	p->name = name;
> > +	p->long_name = dso->long_name;
> > +	list_add_tail(&p->list, &ref_tree);
> 
> so this is a tree, which is actually a list ;-)

It used to be a tree, now it is a stick. :-)

Old code that needs to be renamed.  I can update that.

Cheers,
Don
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