linux-kernel - Re: [patch] events/amd/power add support for fam16h model30h

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Message-ID: <alpine.DEB.2.20.1606171456420.20990@macbook-air>
Date:	Fri, 17 Jun 2016 14:58:41 -0400 (EDT)
From:	Vince Weaver <vincent.weaver@...ne.edu>
To:	Borislav Petkov <bp@...en8.de>
cc:	Vince Weaver <vincent.weaver@...ne.edu>,
	Huang Rui <ray.huang@....com>, linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: Re: [patch] events/amd/power add support for fam16h model30h

On Fri, 17 Jun 2016, Borislav Petkov wrote:

> On Fri, Jun 17, 2016 at 01:38:44PM -0400, Vince Weaver wrote:
> > F15hM02h
> > 
> > fam15h_power-pci-00c4
> > Adapter: PCI adapter
> > power1:      105.64 W  (crit = 115.17 W)
> > 
> > fam15h_power-pci-00d4
> > Adapter: PCI adapter
> > power1:      105.59 W  (crit = 115.17 W)
> 
> Is that a dual-socket machine?
> 
> Because I have only the fam15h_power-pci-00c4 adapter. And mine goes
> between 20W and 40W in idle.

It's a dual-socket server machine.
AMD Opteron(tm) Processor 6376
2 packages, 16 cores each.


> That's Trinity. That PCI device ID is not even in the kernel - I'm
> guessing no one has even thought of enabling fam15_power on it. I don't
> know even whether it supports the different PCI interfaces like TDP, TDP
> limit, etc.
> 
> IOW, something like that might not really help.

I'll try applying the patch.  My code that probes the msrs/pci directly 
from userspace seems to think it has support.

Vince