From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57076) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dZN7N-00066d-JC for qemu-devel@nongnu.org; Sun, 23 Jul 2017 16:04:46 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dZN7K-00085Z-FX for qemu-devel@nongnu.org; Sun, 23 Jul 2017 16:04:45 -0400 Received: from mail-qk0-x235.google.com ([2607:f8b0:400d:c09::235]:33497) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1dZN7K-00084M-9l for qemu-devel@nongnu.org; Sun, 23 Jul 2017 16:04:42 -0400 Received: by mail-qk0-x235.google.com with SMTP id k2so4192209qkf.0 for ; Sun, 23 Jul 2017 13:04:42 -0700 (PDT) Date: Sun, 23 Jul 2017 16:04:40 -0400 From: Kevin O'Connor Message-ID: <20170723200440.GA3718@morn.lan> References: <767EFADFF809234DB6CAABD6D2F93847C5D31539@IRSMSX107.ger.corp.intel.com> <3319b641-b7f3-0ee8-e5ed-9c378e723eb4@redhat.com> <14b1b111-d2d6-6954-2d12-8e0ac791ae44@redhat.com> <97068eca-2788-8396-0f8d-1990c651bdfc@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <97068eca-2788-8396-0f8d-1990c651bdfc@redhat.com> Subject: Re: [Qemu-devel] >256 Virtio-net-pci hotplug Devices List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Marcel Apfelbaum , "Kinsella, Ray" Cc: "qemu-devel@nongnu.org" , seabios@seabios.org, Gerd Hoffmann , Michael Tsirkin On Sun, Jul 23, 2017 at 07:28:01PM +0300, Marcel Apfelbaum wrote: > On 22/07/2017 2:57, Kinsella, Ray wrote: > > When scaling up to 512 Virtio-net devices SeaBIOS appears to really slow > > down when configuring PCI Config space - haven't manage to get this to > > work yet. If there is a slowdown in SeaBIOS, it would help to produce a log with timing information - see: https://www.seabios.org/Debugging#Timing_debug_messages It may also help to increase the debug level in SeaBIOS to get more fine grained timing reports. -Kevin