linux-kernel - Re: [PATCH 06/14] perf hists: Resort hist entries using group members for output

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Message-ID: <20121218153922.GM1283@krava.brq.redhat.com>
Date:	Tue, 18 Dec 2012 16:39:23 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Stephane Eranian <eranian@...gle.com>,
	Namhyung Kim <namhyung.kim@....com>
Subject: Re: [PATCH 06/14] perf hists: Resort hist entries using group
 members for output

On Mon, Dec 17, 2012 at 03:38:57PM +0900, Namhyung Kim wrote:
> From: Namhyung Kim <namhyung.kim@....com>

SNIP

> +static int hist_entry__sort_on_period(struct hist_entry *a,
> +				      struct hist_entry *b)
> +{
> +	int ret;
> +	int i, nr_members;
> +	struct perf_evsel *evsel;
> +	struct hist_entry *pair;
> +	u64 *periods_a, *periods_b;
> +
> +	ret = period_cmp(a->stat.period, b->stat.period);
> +	if (ret || !symbol_conf.event_group)
> +		return ret;
> +
> +	evsel = hists_to_evsel(a->hists);
> +	nr_members = evsel->nr_members;
> +	if (nr_members <= 1)
> +		return ret;
> +
> +	periods_a = zalloc(sizeof(periods_a) * nr_members);
> +	periods_b = zalloc(sizeof(periods_b) * nr_members);

alloca might be more convenient, but not necessary I guess

but as this place would be changed if (when) I send the
patch for linking hist_entries via array.. I'm ok ;-)

Acked-by: Jiri Olsa <jolsa@...hat.com>
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