From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gordan Bobic Subject: Re: =?utf-8?q?Fwd=3A_Re=3A__Xen_4=2E3_/_4=2E4_-_concurren?= =?utf-8?q?t_APIs=2C=09VGA_Passthru?= Date: Tue, 19 Aug 2014 11:31:47 +0100 Message-ID: <69fe35f4ea595e27af1a8c89f1146b17@mail.shatteredsilicon.net> References: "\"<53D5C00E.5040706@ninth-art.de> \\\" <53D659C3.9010500@ninth-art.de>\\\" <53D665C7.6010004@bobich.net> <53D6F500.1010806@ninth-art.de> <53D748DC.10209@bobich.net> <53D74F9E.6010508@ninth-art.de> <53D78B0D.802@ninth-art.de> <53DCC238.3030707@ninth-art.de> <53DE0592.2040208@bobich.net> <53DE0A73.9040304@ninth-art.de>" <53DF41E3.9000406@bobich.net>" <53F21B20.90108@ninth-art.de> <53F21FA9.7040103@bobich.net> <53F26C78.5070805@triad.rr.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <53F26C78.5070805@triad.rr.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 List-Id: xen-devel@lists.xenproject.org On 2014-08-18 22:13, Richie wrote: > On 8/18/2014 11:45 AM, Gordan Bobic wrote: >> On 08/18/2014 04:26 PM, Georg Bege wrote: >>> Hi >>> >>> I simply wanted to tell my tale about the outcome of my experiments, >>> I was occupied with certain other things (including exchanging some >>> zpool's). >>> For now I run an Vista x64 and it works pretty well, I never got the >>> gplpv drivers running on >>> acceptable levels (they are still quite slow) so I decided to pass >>> onboard controller, sound and usb3. >>> This decission seemed to be a wise one and everything works great as >>> expected, the problem with gplpv >>> well it might also be a result of my volume scheme since I only run >>> ZFS >>> - now an raidz1 (on enterprise disks though). >>> I also replaced the nvidia drivers from 331.65 to 337.88 - this >>> revision >>> gave me a lot more performance but I can remember I had this issue on >>> native Windows too. >>> >>> So after a lot of testing, pain, time consuming days (and nights) its >>> really working great - not perfect maybe. >>> My next goal is to dedicate an SSD for that system volume, maybe try >>> Win7 again as well - >>> also I'd like to get an GTX690 and hardmod it so I get a lot more >>> speed... >> >> Modifying it won't get you more speed. >> >> I was originally planning to use a GTX690 and pass one GPU to each of >> my VMs, but I eventually replaced it with a pair of 780Tis. >> >> I am running on a SSD backed zvol, with gplpv. >> >> Gordan >> > > Do you mind posting the specifics on your setups? I read as many > threads with this topic as I could find in the archives. It sounds > like you are using Xen 4.3.2, Vista 64, nonmodded GTX as secondary > passthrough and older nvidia drivers. Xen 4.3.0 for me - I had to patch my hvmloader to mark most of the RAM between 1GB and 4GB as reserved due to a bug in my PCIe multiplexers which break IOMMU operation (Nvidia NF200). I saw no reason to upgrade since it meant re-patching. I will upgrade to 4.4.x when the patches that limit RAM below 4GB are incorporated since I should be able to make do with those instead of my gross hack job. I have two VMs, one is XP/64, the other is Win7/64. I am using _modified_ GTX780Ti cards. Previously I was running a modified 680, and before that a modified 480 (4xx series and older cards can be modified with just a small BIOS patch). Using secondary passthrough and the latest 331.xx driver (the exact version escapes me at the moment). > Did you have to do any vBAR patching? No. > Are you loading a copy of the VGA's rom bios? No. No BIOS level output from the GPU being passed through until the driver loads and initializes it. Gordan