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Date: Wed, 10 Feb 2016 13:52:08 +0100
From: Jiri Olsa <jolsa@redhat.com>
To: Namhyung Kim <namhyung@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>, Ingo Molnar <mingo@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>, Jiri Olsa <jolsa@kernel.org>,
        LKML <linux-kernel@vger.kernel.org>, David Ahern <dsahern@gmail.com>,
        Andi Kleen <andi@firstfloor.org>,
        Stephane Eranian <eranian@google.com>, Wang Nan <wangnan0@huawei.com>
Subject: Re: [PATCH 16/23] perf hists browser: Count number of hierarchy
 entries
Message-ID: <20160210125208.GA15597@krava.redhat.com>
References: <1454677315-7515-1-git-send-email-namhyung@kernel.org>
 <1454677315-7515-17-git-send-email-namhyung@kernel.org>
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On Fri, Feb 05, 2016 at 10:01:48PM +0900, Namhyung Kim wrote:

SNIP

> +static int hierarchy_count_rows(struct hist_browser *hb, struct hist_entry *he,
> +				bool include_children)
> +{
> +	int count = 0;
> +	struct rb_node *node;
> +	struct hist_entry *child;
> +
> +	if (he->leaf)
> +		return callchain__count_rows(&he->sorted_chain);
> +
> +	node = rb_first(&he->hroot_out);
> +	while (node) {
> +		float percent;
> +
> +		child = rb_entry(node, struct hist_entry, rb_node);
> +		percent = hist_entry__get_percent_limit(child);
> +
> +		if (!child->filtered && percent >= hb->min_pcnt) {
> +			count++;
> +
> +			if (include_children && child->unfolded)
> +				count += hierarchy_count_rows(hb, child, true);
> +		}
> +
> +		node = rb_next(node);
> +	}
> +	return count;
> +}

SNIP

> +		if (he->leaf)
> +			browser->nr_callchain_rows -= he->nr_rows;
>  		else
> +			browser->nr_hierarchy_entries -= he->nr_rows;
> +
> +		if (symbol_conf.report_hierarchy)
> +			child_rows = hierarchy_count_rows(browser, he, true);
> +
> +		if (he->unfolded) {
> +			if (he->leaf)
> +				he->nr_rows = callchain__count_rows(&he->sorted_chain);
> +			else
> +				he->nr_rows = hierarchy_count_rows(browser, he, false);

looks like above condition could go to just following call:

			he->nr_rows = hierarchy_count_rows(browser, he, false);

because there's same condtiion in the hierarchy_count_rows function

thanks,
jirka