linux-kernel - Re: [PATCH 8/9] perf timechart: Map power:cpu_idle events to the corresponding cpuidle state

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Date:	Fri, 7 Jan 2011 11:52:11 +0100
From:	Thomas Renninger <trenn@...e.de>
To:	linux-perf-users@...r.kernel.org
Cc:	mingo@...e.hu, arjan@...ux.intel.com, lenb@...nel.org,
	j-pihet@...com, linux-acpi@...r.kernel.org,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	linux-omap@...r.kernel.org,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: [PATCH 8/9] perf timechart: Map power:cpu_idle events to the corresponding cpuidle state

Argh, forgot guilt refresh on this one.
The changelog could be a bit more detailed by adding:

On Friday 07 January 2011 11:29:49 Thomas Renninger wrote:
> Before, power:cpu_idle events were very specific X86 Intel mwait events.
> This got fixed with previous patches and cpu_idle events are now thrown by
> all cpuidle drivers and can be mapped to the corresponding cpuidle state
> in /sys.
> 
> This patch reads out the corresponding cpuidle name of a cpu_idle event
> and uses it in the title line of the chart (c-states Cx in x86, omap2
> - DDR self refresh states for various arm archs).
> 
> It also reads out the corresponding abbr(eviation) and uses the string
> to draw the cpu idle occurences. This needs a short (3 letter) string
> to keep the overview in the chart.

All features/fixes this patch includes:
  - Read up cpuidle events from sysfs if available
    and thus make them architecture independent
  - Use (free) green color to display idle events in the chart,
    red is also used by "Blocked IO" event(s)
  - Fix wrong class="rect.cX" to class="cX" idle box svg drawing
    definitions. This fixes up black idle drawings for eog (eye of gnome)
    and firefox (inkscape somehow could handle the broken case).

    Thomas
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