Re: [PATCH] powercap/rapl: handle domain energy unit
From: Jacob Pan
Date: Fri Mar 13 2015 - 06:53:24 EST
On Thu, 12 Mar 2015 17:50:20 -0500
kazutomo <kazutomo.yoshii@xxxxxxxxx> wrote:
> On 03/12/2015 05:05 PM, Jacob Pan wrote:
> > On Thu, 12 Mar 2015 16:59:43 -0500
> > kazutomo <kazutomo.yoshii@xxxxxxxxx> wrote:
> >>> according to the document, future DRAM energy unit will always be
> >>> hardcoded to 15.3uJ, no enumeration since there is no domain
> >>> specific MSR for energy unit.
> >> Which document are you referring to?
> > Intel DocID:330784-001 Sept 2014
> > Intel Xeon Processor E5-1600 and E5-2600 V2 of 2.
> I think V2 is Ivy Bridge. Is this typo?
v2 is volume 2, glad you found the doc.
BTW, i just sent out v2 of the patch to address the issues, changes are
1. use pJ for driver energy unit
2. fix max_energy_range_uj, makes it per domain
3. add reference doc info to commit message
> By googling, I found a datasheet titled:
> "Intel Xeon Processor E5-1600 and E5-2600 v3 Product Families, Volume
> 2 of 2. Datasheet, September 2014, Reference Number: 330784-001 "
> It clearly says "ENERGY_UNIT for DRAM domain is 15.3uJ."
> - kaz
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