linux-kernel - Re: [PATCH 1/7] perf hist: Introduce hists__match

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Message-ID: <20160919074824.GA26906@krava>
Date:   Mon, 19 Sep 2016 09:48:24 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Jiri Olsa <jolsa@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Andi Kleen <andi@...stfloor.org>
Subject: Re: [PATCH 1/7] perf hist: Introduce hists__match_hierarchy()

On Tue, Sep 13, 2016 at 04:45:46PM +0900, Namhyung Kim wrote:

SNIP

> +static struct hist_entry *hists__find_hierarchy_entry(struct rb_root *root,
> +						      struct hist_entry *he)
> +{
> +	struct rb_node *n = root->rb_node;
> +
> +	while (n) {
> +		struct hist_entry *iter;
> +		struct perf_hpp_fmt *fmt;
> +		int64_t cmp = 0;
> +
> +		iter = rb_entry(n, struct hist_entry, rb_node_in);
> +		perf_hpp_list__for_each_sort_list(he->hpp_list, fmt) {
> +			cmp = fmt->collapse(fmt, iter, he);
> +			if (cmp)
> +				break;
> +		}

could you call hist_entry__collapse in here instead of above code?

thanks,
jirka

> +
> +		if (cmp < 0)
> +			n = n->rb_left;
> +		else if (cmp > 0)
> +			n = n->rb_right;
> +		else
> +			return iter;
> +	}
> +
> +	return NULL;
> +}
> +