linux-kernel - Re: [PATCH 3/6] perf tools: Save column length in perf_hpp

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Date:	Thu, 24 Jul 2014 14:10:10 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Namhyung Kim <namhyung@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Ingo Molnar <mingo@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Namhyung Kim <namhyung.kim@....com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/6] perf tools: Save column length in perf_hpp_fmt

On Wed, Jul 09, 2014 at 02:28:11PM +0900, Namhyung Kim wrote:
> Save column length in the hpp format and pass it to print functions.
> This is a preparation for users to control column width in the output.

SNIP

> +
> +void perf_hpp__reset_width(struct perf_hpp_fmt *fmt, struct hists *hists)
> +{
> +	int idx;
> +
> +	if (perf_hpp__is_sort_entry(fmt))
> +		return perf_hpp__reset_sort_width(fmt, hists);
> +
> +	for (idx = 0; idx < PERF_HPP__MAX_INDEX; idx++) {
> +		if (fmt == &perf_hpp__format[idx])
> +			break;
> +	}
> +
> +	if (idx == PERF_HPP__MAX_INDEX)
> +		return;
> +
> +	switch (idx) {
> +	case PERF_HPP__OVERHEAD:
> +	case PERF_HPP__OVERHEAD_SYS:
> +	case PERF_HPP__OVERHEAD_US:
> +	case PERF_HPP__OVERHEAD_ACC:
> +		fmt->len = 8;
> +		break;
> +
> +	case PERF_HPP__OVERHEAD_GUEST_SYS:
> +	case PERF_HPP__OVERHEAD_GUEST_US:
> +		fmt->len = 9;
> +		break;

just curious.. why is it 9 for guest %, while we use 8 for host?
I understand that was the current state

jirka
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