linux-kernel - Re: [REDO PATCH v7] perf/x86/amd/power: Add AMD accumulated power reporting mechanism

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Date:	Thu, 16 Jun 2016 17:16:04 -0400 (EDT)
From:	Vince Weaver <vincent.weaver@...ne.edu>
To:	Vince Weaver <vincent.weaver@...ne.edu>
cc:	Huang Rui <ray.huang@....com>, Borislav Petkov <bp@...e.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	Andy Lutomirski <luto@...capital.net>,
	Robert Richter <rric@...nel.org>,
	Jacob Shin <jacob.w.shin@...il.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Kan Liang <kan.liang@...el.com>, linux-kernel@...r.kernel.org,
	x86@...nel.org,
	Suravee Suthikulpanit <suravee.suthikulpanit@....com>,
	Aravind Gopalakrishnan <Aravind.Gopalakrishnan@....com>,
	Borislav Petkov <bp@...en8.de>,
	Guenter Roeck <linux@...ck-us.net>,
	Fengguang Wu <fengguang.wu@...el.com>
Subject: Re: [REDO PATCH v7] perf/x86/amd/power: Add AMD accumulated power
 reporting mechanism

On Thu, 16 Jun 2016, Vince Weaver wrote:

One more followup, if I run the benchmark a bunch of times I get this:

      4,472,401.06 mWatts power/power-pkg/                                            
     50,886,303.28 mWatts power/power-pkg/                                            
     81,737,001.44 mWatts power/power-pkg/                                            
          6,525.89 mWatts power/power-pkg/                                            
          6,522.04 mWatts power/power-pkg/                                            
          6,505.68 mWatts power/power-pkg/                                            
      4,938,855.83 mWatts power/power-pkg/                                            
      4,614,620.11 mWatts power/power-pkg/                                            
     79,679,069.41 mWatts power/power-pkg/                                            
    152,794,060.83 mWatts power/power-pkg/                                            
      3,942,429.02 mWatts power/power-pkg/                                            
          6,506.73 mWatts power/power-pkg/                                            
     60,198,884.39 mWatts power/power-pkg/                                            

I'd believe the 6W report as a value for how much the CPU is using.  The 
others seem spurious.  I guess I should go check the Errata for this chip.

Vince