From mboxrd@z Thu Jan 1 00:00:00 1970 From: Simon Martin Subject: Re: Strange interdependace between domains Date: Fri, 14 Feb 2014 12:02:38 +0000 Message-ID: <6010385428.20140214120238@gmail.com> References: <1646915994.20140213165604@gmail.com> <1392313015.32038.112.camel@Solace> <295276356.20140213222507@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <295276356.20140213222507@gmail.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: xen-devel@lists.xen.org Cc: Andrew Cooper , Dario Faggioli , Nate Studer , Don Slutz , Ian Campbell List-Id: xen-devel@lists.xenproject.org Hello Simon, Thanks everyone and especially Ian! It was the hyperthreading that was causing the problem. Here's my current configuration: # xl cpupool-list -c Name CPU list Pool-0 0,1 pv499 2,3 # xl vcpu-list Name ID VCPU CPU State Time(s) CPU Affinity Domain-0 0 0 0 r-- 16.6 0 Domain-0 0 1 1 -b- 7.3 1 win7x64 1 0 1 -b- 82.5 all win7x64 1 1 0 -b- 18.6 all pv499 2 0 3 r-- 226.1 3 I have pinned dom0 as I wasn't sure whether it belongs to Pool-0 (I assume it does, can you confirm please). Dario, if you are going to look at the Looking at my timings with this configuration I am seeing a 1% variation (945 milliseconds +/- 5). I think this can be attributable to RAM contention, at the end of the day all cores are competing for the same bus. -- Best regards, Simon mailto:furryfuttock@gmail.com