linux-kernel - Re: [PATCH 05/10] perf tools: Add dynamic sort key for tracepoint events

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Date:	Sun, 20 Dec 2015 14:51:32 +0100
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 <peterz@...radead.org>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Wang Nan <wangnan0@...wei.com>
Subject: Re: [PATCH 05/10] perf tools: Add dynamic sort key for tracepoint
 events

On Wed, Dec 16, 2015 at 12:35:38AM +0900, Namhyung Kim wrote:

SNIP

> +
> +	if (!len)
> +		len = hde_width(hde);
> +
> +	return len;
> +}
> +
> +static int __sort__hde_entry(struct perf_hpp_fmt *fmt, struct perf_hpp *hpp,
> +			     struct hist_entry *he)
> +{
> +	struct hpp_dynamic_entry *hde;
> +	size_t len = fmt->user_len;
> +	struct trace_seq seq;
> +	int ret;
> +
> +	hde = container_of(fmt, struct hpp_dynamic_entry, hpp);
> +
> +	if (!len)
> +		len = hde_width(hde);
> +
> +	if (hists_to_evsel(he->hists) != hde->evsel)
> +		return scnprintf(hpp->buf, hpp->size, "%*.*s", len, len, "N/A");

hum, how can this happen? ... "hists_to_evsel(he->hists) != hde->evsel"

thanks,
jirka
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