From mboxrd@z Thu Jan 1 00:00:00 1970 From: Keir Fraser Subject: Re: [Patch] Fix the slow wall clock time issue in x64 SMP Vista Date: Wed, 10 Jan 2007 11:36:51 +0000 Message-ID: References: <666CC8FCE3247C4DA876BA979059781A5C2889@pdsmsx401.ccr.corp.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <666CC8FCE3247C4DA876BA979059781A5C2889@pdsmsx401.ccr.corp.intel.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: "Cui, Dexuan" , xen-devel@lists.xensource.com Cc: Keir Fraser List-Id: xen-devel@lists.xenproject.org On 10/1/07 11:29, "Cui, Dexuan" wrote: > In x64 SMP Vista HVM guest (vcpus=2 in the configuration file), the wall > clock time is 50% slower than that in the real world. The attached patch > fixes the issue. Looks like this code will inject fewer HPET interrupts. How does that make time go *faster*? Also, looking at hpet_timer_fn() is vcpu_kick() actually required? The PIC logic invoked from hpet_route_interrupt() should do any required kicking. -- Keir