From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by dpdk.org (Postfix) with ESMTP id 123655A54 for ; Tue, 23 Feb 2016 08:21:46 +0100 (CET) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga104.fm.intel.com with ESMTP; 22 Feb 2016 23:21:25 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.22,488,1449561600"; d="scan'208";a="921826481" Received: from yliu-dev.sh.intel.com (HELO yliu-dev) ([10.239.66.49]) by fmsmga002.fm.intel.com with ESMTP; 22 Feb 2016 23:21:24 -0800 Date: Tue, 23 Feb 2016 15:22:45 +0800 From: Yuanhan Liu To: Clarylin L Message-ID: <20160223072245.GB14300@yliu-dev.sh.intel.com> References: <20160223035001.GA21426@yliu-dev.sh.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.23 (2014-03-12) Cc: dev@dpdk.org Subject: Re: [dpdk-dev] [dpdk-virtio] DPDK stopped working on virtio X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 23 Feb 2016 07:21:47 -0000 On Mon, Feb 22, 2016 at 11:00:28PM -0800, Clarylin L wrote: > I am working with DPDK 2.0.  > > I guess it's not DPDK code issue , but more like an environment issue (as same > code has been working fine before. It's even working on another setup now). > Someone might have accidentally changed my setup, and I want to find out what > made dpdk-virtio stop working.  > > Is DPDK-virtio dependent on any specific modules on the hypervisor? or are > there any configurations on the hypervisor that would impact the functionality > of  virtio? Nope, none that I can think of. > or anything else I need to look into and check? My VM is running on > Ubuntu KVM. The vhost and virtio log? --yliu > > On Mon, Feb 22, 2016 at 7:50 PM, Yuanhan Liu > wrote: > > On Mon, Feb 22, 2016 at 11:15:57AM -0800, Clarylin L wrote: > > I am running DPDK application (testpmd) within a VM based on virtio. With > > the same hypervisor and same DPDK code, it used to work well. But it > > stopped working since last week. The VM's port could not receive > anything. > > I ran tcpdump on host's physical port, bridge interface as well as vnet > > interface, and did see packets coming in. However on VM's port there was > > nothing. > > > > I ran gdb trying to debug, it hit function virtio_recv_mergeable_pkts(), > > but nb_used=VIRTQUEUE_NUSED(rxvq) always gave 0. I guess it's because the > > queue was empty. > > > > I enabled the PMD debug logging and the only thing that might be an issue > > was the following part. Other than this I could not see any thing that > > could indicate potential issues. > > > > Thu Feb 18 19:20:10 2016^@PMD: get_uio_dev(): Could not find uio resource > > Thu Feb 18 19:20:10 2016^@PMD: virtio_resource_init_by_ioports(): PCI > Port > > IO found start=0xc040 with size=0x40 > > That could be normal, when you don't bind the driver to igb_uio. > > > If someone can give any pointers that I should further look into, that'd > be > > very helpful. Appreciate your help! > > What's the last commit you are testing? And what are the steps > to reproduce it? I have a quick try with vhost-switch example, > with pkts injected by IXIA; it works fine here. > > Or better, mind do a git bisect? There aren't too many commits > there. It should be a pretty fast bisect. > >         --yliu > >