From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ian Campbell Subject: Re: [PATCH v7 3/3] tools & docs: add tools and docs support for Intel CDP Date: Wed, 14 Oct 2015 10:20:02 +0100 Message-ID: <1444814402.23192.140.camel@citrix.com> References: <1444726426-10567-1-git-send-email-he.chen@linux.intel.com> <1444726426-10567-4-git-send-email-he.chen@linux.intel.com> <1444813727.3009.57.camel@citrix.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xen.org with esmtp (Exim 4.72) (envelope-from ) id 1ZmIEB-0007Eu-2X for xen-devel@lists.xenproject.org; Wed, 14 Oct 2015 09:20:07 +0000 In-Reply-To: <1444813727.3009.57.camel@citrix.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: Dario Faggioli , He Chen , xen-devel@lists.xenproject.org Cc: wei.liu2@citrix.com, stefano.stabellini@eu.citrix.com, andrew.cooper3@citrix.com, ian.jackson@eu.citrix.com, jbeulich@suse.com, chao.p.peng@linux.intel.com, keir@xen.org List-Id: xen-devel@lists.xenproject.org On Wed, 2015-10-14 at 11:08 +0200, Dario Faggioli wrote: > On Tue, 2015-10-13 at 16:53 +0800, He Chen wrote: > > diff --git a/docs/misc/xl-psr.markdown b/docs/misc/xl-psr.markdown > > index c32e25c..9b08ee3 100644 > > --- a/docs/misc/xl-psr.markdown > > +++ b/docs/misc/xl-psr.markdown > > @@ -127,6 +127,59 @@ Per domain CBM settings can be shown by: > > > > `xl psr-cat-show` > > > > +## Code and Data Prioritization (CDP) > > + > > +Code and Data Prioritization (CDP) Technology is an extension of > > CAT, which > > +is available on Intel Broadwell and later server platforms. CDP > > enables > > +isolation and separate prioritization of code and data fetches to > > the L3 > > +cache in a software configurable manner, which can enable workload > > +prioritization and tuning of cache capacity to the characteristics > > of the > > +workload. CDP extends Cache Allocation Technology (CAT) by providing > > +separate code and data masks per Class of Service (COS). > > + > > +CDP can be enabled by adding `psr=cdp` to Xen command line. > > + > > +When CDP is enabled, > > + > > + * the CAT masks are re-mapped into interleaved pairs of masks for > > data or > > + code fetches. > > + > > + * the range of COS for CAT is re-indexed, with the lower-half of > > the COS > > + range available for CDP. > > + > > +CDP allows the OS or Hypervisor to partition cache allocation in a > > more > > +fine-grained. > > > "In a more fine-grained" "way"? Or "manner"? > > (I'm not a native speaker, though, so if that's not the case, sorry for > the noise.) You are right, there is a word missing. "manner" would be my interpretation of what was intended. Ian. > > Regards, > Dario