From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Jan Beulich" Subject: Re: Xen Platform QoS design discussion Date: Thu, 29 May 2014 10:11:46 +0100 Message-ID: <538707E202000078000B5293@mail.emea.novell.com> References: <40776A41FC278F40B59438AD47D147A9119F3FEA@SHSMSX104.ccr.corp.intel.com> <5363804B020000780000E604@mail.emea.novell.com> <40776A41FC278F40B59438AD47D147A9119F4EF4@SHSMSX104.ccr.corp.intel.com> <5363AE54020000780000E7A2@mail.emea.novell.com> <40776A41FC278F40B59438AD47D147A9119FE6BB@SHSMSX104.ccr.corp.intel.com> <5368B418.9000307@citrix.com> <536AA342.8030003@citrix.com> <40776A41FC278F40B59438AD47D147A911A00A4C@SHSMSX104.ccr.corp.intel.com> <536B69AB.7010005@citrix.com> <40776A41FC278F40B59438AD47D147A911A150FC@SHSMSX104.ccr.corp.intel.com> <537A0B17020000780001390F@mail.emea.novell.com> <5379F576.4050108@eu.citrix.com> <537A18260200007800013A06@mail.emea.novell.com> <40776A41FC278F40B59438AD47D147A911A1AAEC@SHSMSX104.ccr.corp.intel.com> <537DD3E60200007800014CFD@mail.emea.novell.com> <537DC2F2.30702@eu.citrix.com> <40776A41FC278F40B59438AD47D147A911A206A4@SHSMSX104.ccr.corp.intel.com> <5386E96402000078000B525D@mail.emea.novell.com> <40776A41FC278F40B59438AD47D147A911A20944@SHSMSX104.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <40776A41FC278F40B59438AD47D147A911A20944@SHSMSX104.ccr.corp.intel.com> Content-Disposition: inline List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xen.org Errors-To: xen-devel-bounces@lists.xen.org To: george.dunlap@eu.citrix.com, dongxiao.xu@intel.com Cc: andrew.cooper3@citrix.com, will.auld@intel.com, Ian.Campbell@citrix.com, jun.nakajima@intel.com, xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org >>> "Xu, Dongxiao" 05/29/14 9:31 AM >>> >Okay. If I understand correctly, you prefer to implement a pure MSR access >hypercall for one CPU, and put all other CQM things in libxc/libxl layer. >In this case, if libvert/XenAPI is trying to query a domain's cache utilization >in the system (say 2 sockets), then it will trigger _two_ such MSR access >hypercalls for CPUs in the 2 different sockets. >If you are okay with this idea, I am going to implement it. I am okay with it, but give it a couple of days before you start so that others can voice their opinions too. Jan