From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <linux-kernel-owner@vger.kernel.org>
Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand
	id S1757907AbcBJML2 (ORCPT <rfc822;w@1wt.eu>);
	Wed, 10 Feb 2016 07:11:28 -0500
Received: from mx1.redhat.com ([209.132.183.28]:33330 "EHLO mx1.redhat.com"
	rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP
	id S1757800AbcBJML1 (ORCPT <rfc822;linux-kernel@vger.kernel.org>);
	Wed, 10 Feb 2016 07:11:27 -0500
Date: Wed, 10 Feb 2016 13:11:19 +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 13/23] perf hists: Support filtering in hierarchy mode
Message-ID: <20160210121119.GB19907@krava.redhat.com>
References: <1454677315-7515-1-git-send-email-namhyung@kernel.org>
 <1454677315-7515-14-git-send-email-namhyung@kernel.org>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1454677315-7515-14-git-send-email-namhyung@kernel.org>
User-Agent: Mutt/1.5.24 (2015-08-30)
Sender: linux-kernel-owner@vger.kernel.org
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Fri, Feb 05, 2016 at 10:01:45PM +0900, Namhyung Kim wrote:

SNIP

> +			/* force to go to sibling in the hierarchy */
> +			saved_unfolded = h->unfolded;
> +			h->unfolded = false;
> +
> +			nd = rb_hierarchy_next(&h->rb_node);
> +			h->unfolded = saved_unfolded;
> +		}
> +	}
> +
> +	/* resort output (top-level entries only) */
> +	nd = rb_first(&hists->entries);
> +	while (nd) {
> +		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
> +
> +		nd = rb_next(nd);
> +		rb_erase(&h->rb_node, &hists->entries);
> +
> +		__hists__insert_output_entry(&tmp, h, 0, false);
> +	}

what's the purpose of this resort? the only affect I see
is to recalculate callchains

thanks,
jirka