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

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Message-ID: <20140218130929.GL4343@krava.brq.redhat.com>
Date:	Tue, 18 Feb 2014 14:09:29 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Don Zickus <dzickus@...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 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 ;-)

jirka
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