From mboxrd@z Thu Jan 1 00:00:00 1970 From: "David S. Ahern" Subject: Re: [PATCH 5/6] kvm: qemu: virtio-net: handle all tx in I/O thread without timer Date: Tue, 04 Nov 2008 08:23:25 -0700 Message-ID: <491068ED.3020902@cisco.com> References: <> <1225389113-28332-1-git-send-email-markmc@redhat.com> <1225389113-28332-2-git-send-email-markmc@redhat.com> <1225389113-28332-3-git-send-email-markmc@redhat.com> <1225389113-28332-4-git-send-email-markmc@redhat.com> <1225389113-28332-5-git-send-email-markmc@redhat.com> <1225389113-28332-6-git-send-email-markmc@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Avi Kivity , kvm@vger.kernel.org To: Mark McLoughlin Return-path: Received: from sj-iport-2.cisco.com ([171.71.176.71]:16608 "EHLO sj-iport-2.cisco.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752392AbYKDPXa (ORCPT ); Tue, 4 Nov 2008 10:23:30 -0500 In-Reply-To: <1225389113-28332-6-git-send-email-markmc@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: Mark McLoughlin wrote: > Note also that when tuning for a specific workload, which CPU > the I/O thread is pinned to is important. > Hi Mark: Can you give an example of when that has a noticeable affect? For example, if the guest handles network interrupts on vcpu0 and it is pinned to pcpu0 where should the IO thread be pinned for best performance? thanks, david