From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ben Widawsky <ben@bwidawsk.net>
Subject: Re: [PATCH 7/7] drm/i915: expose energy counter on SNB
 and IVB
Date: Wed, 10 Apr 2013 12:13:49 -0700
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To: Chris Wilson <chris@chris-wilson.co.uk>, Jesse Barnes <jbarnes@virtuousgeek.org>, intel-gfx@lists.freedesktop.org
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On Wed, Apr 10, 2013 at 03:27:05PM +0100, Chris Wilson wrote:
> On Fri, Sep 07, 2012 at 10:51:44AM -0700, Ben Widawsky wrote:
> > On Fri, 7 Sep 2012 12:03:37 +0200
> > Daniel Vetter <daniel@ffwll.ch> wrote:
> > 
> > > On Thu, Sep 06, 2012 at 01:54:10PM -0700, Ben Widawsky wrote:
> > > > From: Jesse Barnes <jbarnes@virtuousgeek.org>
> > > > 
> > > > On SNB and IVB, there's an MSR (also exposed through MCHBAR) we can use
> > > > to read out the amount of energy used over time.  Expose this in sysfs
> > > > to make it easy to do power comparisons with different configurations.
> > > > 
> > > > If the platform supports it, the file will show up under the
> > > > drm/card0/power subdirectory of the PCI device in sysfs as gt_energy_uJ.
> > > > The value in the file is a running total of energy (in microjoules)
> > > > consumed by the graphics device.
> > > > 
> > > > v2: move to sysfs (Ben, Daniel)
> > > >     expose a simple value (Chris)
> > > >     drop unrelated hunk (Ben)
> > > > 
> > > > Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
> > > > 
> > > > v3: by Ben
> > > > Tied it into existing rc6  sysfs entries and named that a more generic
> > > > "power attrs." Fixed rebase conflicts.
> > > > 
> > > > Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
> 
> A reminder that we never finished this patch.
> -Chris
> 
> -- 
> Chris Wilson, Intel Open Source Technology Centre

This will be supported in the RAPL driver, so I think we don't need it.
The latest version of that can be found:
https://lkml.org/lkml/2013/4/9/812

-- 
Ben Widawsky, Intel Open Source Technology Center