linux-kernel - Re: [PATCH 16/29] perf, tools: Add support for weight v7

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Message-ID: <20130123171351.GZ30577@one.firstfloor.org>
Date:	Wed, 23 Jan 2013 18:13:51 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	Andi Kleen <andi@...stfloor.org>, "mingo@...e.hu" <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 16/29] perf, tools: Add support for weight v7

> For PEBS-LL and possibly other special cases, it is important to remember
> that perf report always end up sorting by period (hist_collapse_resort). But
> for PEBS-LL we want to sort on nr_events * weight. Thus, with your patch,
> the only way, I found, to achieve this is by passing:
> 
>        add_hist_entry(self, &entry, al, weight, weight);

Seems like a hack. IMHO it should always sort by all the keys 
i specified with --sort in exactly that order I specified

I had a similar thing in a really old version of my patches,
but I gave it up because it was too unintuitive.

-Andi
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