linux-kernel - RE: [PATCH V4 0/7] x86/intel_rdt: Intel Cache Allocation Technology

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Message-ID: <3908561D78D1C84285E8C5FCA982C28F329ED336@ORSMSX114.amr.corp.intel.com>
Date:	Wed, 25 Feb 2015 16:40:04 +0000
From:	"Luck, Tony" <tony.luck@...el.com>
To:	Peter Zijlstra <peterz@...radead.org>,
	Vikas Shivappa <vikas.shivappa@...ux.intel.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Shivappa, Vikas" <vikas.shivappa@...el.com>,
	"Fleming, Matt" <matt.fleming@...el.com>,
	"hpa@...or.com" <hpa@...or.com>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"mingo@...nel.org" <mingo@...nel.org>,
	"tj@...nel.org" <tj@...nel.org>,
	"Auld, Will" <will.auld@...el.com>,
	"Hansen, Dave" <dave.hansen@...el.com>,
	"Kleen, Andi" <andi.kleen@...el.com>,
	"Juvva, Kanaka D" <kanaka.d.juvva@...el.com>
Subject: RE: [PATCH V4 0/7] x86/intel_rdt: Intel Cache Allocation Technology

> The CAT thing was annoying already, but at least one can find that in
> the SDM, this RDT thing, not a single mention.

The problems of development at the bleeding edge. Would you rather Linux
sat on the sidelines until there are enough Google hits from other users of
new features?

I did get one hit for a search for: intel "resource director technology" ... but
it only has one line in a table with a 50,000' view of what it does.

   http://www.intel.com/content/dam/www/public/us/en/documents/guides/xeon-intel-server-processor-comparison-guide.pdf

   Technology: Intel Resource Director Technology

   Description: Allows the hypervisor to monitor Last Level Cache usage at the application
   and VM levels.

   Benefit: Helps to improve performance and efficiency by providing better
   information for scheduling, load balancing, and workload migration

Which isn't any help in evaluating this patch series :-(

-Tony


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