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{Guide} Create a Gaming Virtual Machine - Page 39

post #381 of 824
Quote:
Originally Posted by dizzy4 View Post

I don't think it can be 100% off if it is connected to PCI power. This would be like booting the computer with a different card. The other(s) are still turned on during boot, but in an idle mode. The difference is in initialization. Another reason I believe it stays on is because dom0 can always see the card and the PCI bus whether connected to a VM or not.

I agree with you. Which is why I'm curious to see in which state the graphics card runs when not in use.

My old PC has a passively cooled Nvidia card (can't remember the model) and I always monitored its temperature with lmsensor. When I turned on the PC and left it at the login prompt for some time, the graphics card would get really hot (as seen right after logon). Only after the logon, and after loading the Nvidia driver would the temperature go down. The Nvidia driver has a power throttling feature which - in this case - only works while the driver is loaded.

So, what I hope for is that the graphics adapter is in a low power mode at default, and only activated to full power when using the driver. Or whatever power saving mechanism there is. Just the opposite of what the old graphics module and driver did.

On a side note: I've been doing some reading on the Xen Wiki site and found this interesting script: http://wiki.xen.org/wiki/Bind_lib.bash_:_A_script_that_makes_pciback_with_modules_easier_to_use. It's only relevant to xend / xm toolstack users (not the newest 4.2 hypervisor with xl toolstack). It makes me think about grabbing my Nvidia card (the one I use for the Windows domU) while not running Windows and to use it for Linux. The key sentence on that page is: "This script is tested with a Radeon 6770 card, using pciback, with "pci_passthru=0" and "stdvga=1". Using this method, you don't need to blacklist radeon. " Will have to try it.
post #382 of 824
Hey guys. Really interested in doing this to my sig rig. Had a couple questions though.

1. If I understand correctly, it's like running virtualbox over linux. Only difference is there is no emulation going on, so it'll be like running the OS natively.
2. Theoretically, If I have two graphics cards and enough hard drive space, CPU power and RAM, I can run two OS's (e.g. 2 instances of Windows 7) and run TF2 on one OS and watch a blu-ray on the other with little lag? Also I get to individually assign PCI devices like a RAID card to their own OS right?

Downtime isn't really an issue, I plan to save images of my current OS install and give this a shot. I plan to spend all day getting this to work. tongue.gif
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post #383 of 824
Thread Starter 
Quote:
Originally Posted by caffeinescandal View Post

Hey guys. Really interested in doing this to my sig rig. Had a couple questions though.
1. If I understand correctly, it's like running virtualbox over linux. Only difference is there is no emulation going on, so it'll be like running the OS natively.
2. Theoretically, If I have two graphics cards and enough hard drive space, CPU power and RAM, I can run two OS's (e.g. 2 instances of Windows 7) and run TF2 on one OS and watch a blu-ray on the other with little lag? Also I get to individually assign PCI devices like a RAID card to their own OS right?
Downtime isn't really an issue, I plan to save images of my current OS install and give this a shot. I plan to spend all day getting this to work. tongue.gif

There is still some emulation done. QEMU is the base device model, but the video and cpu hardware is not emulated. Most pci devices will work well, but some video cards (some nvidia) require some patches. I think the raid card should be good for a NAS and HTPC virtual machine. If you have enough resources the lag shouldn't be an issue.
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post #384 of 824
Quote:
Originally Posted by caffeinescandal View Post

Hey guys. Really interested in doing this to my sig rig. Had a couple questions though.
1. If I understand correctly, it's like running virtualbox over linux. Only difference is there is no emulation going on, so it'll be like running the OS natively.
2. Theoretically, If I have two graphics cards and enough hard drive space, CPU power and RAM, I can run two OS's (e.g. 2 instances of Windows 7) and run TF2 on one OS and watch a blu-ray on the other with little lag? Also I get to individually assign PCI devices like a RAID card to their own OS right?
Downtime isn't really an issue, I plan to save images of my current OS install and give this a shot. I plan to spend all day getting this to work. tongue.gif

With regard to hardware, the FX990 chipset supports IOMMU (the AMD equivalent of VT-d) - see here: http://wiki.xen.org/wiki/VTd_HowTo. BUT, unfortunately Asus does not support Linux, so you need to be very cautious with BIOS updates - one BIOS might work, the other not, and if it doesn't, you'll be on your own. Also note these two threads about your board:
http://forums.bit-tech.net/showthread.php?p=2965518 and http://vip.asus.com/forum/view.aspx?board_id=1&model=SABERTOOTH+990FX&id=20110904052005048&page=1&SLanguage=en-us.
You will need to enable SVM (AMD-V) and perhaps also IOMMU in your 990FX motherboard BIOS.

Your CPU should work, looking at the specs.

Graphics card: Your HD 6850 should be good.

As to performance, there are worlds between say Virtualbox and Xen with VGA passthrough. I think it's worth to install the GPLPV drivers in Windows once you successfully setup your Windows domU (VM).

Time: It took me a lot more than a day to get my machine working, but then I had tried with incompatible hardware and a different distro (Linux Mint). It was a good learning experience, though. If things don't work at first trial, DON'T GIVE UP. Xen is real cool and dizzy4 gives us the easiest how-to to get it working.

Good luck!
post #385 of 824
Perfect! Just what I needed, thank you very much!
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post #386 of 824
So, I cheated a bit, but I got this working on Linux Mint as well. It should be said, I just copied my config file over from fedora and used the pre made logical volume I had with windows already on it. tongue.gif
Also, I didn't have to bridge my network again, just like in fedora which I thought was strange.

Question for those of you who are experienced with LVM: What happens if I format off fedora(which is where I made all my volumes)?
I'd much rather use Mint if possible. I'm going to make a new windows VM now to make sure everything is working, but If i can just format off fedora and use mint i'd be pretty happy. tongue.gif

EDIT: So, I made a new VM in Mint with windows and had no issues, and that naggy bluescreen from the last time I tried this is no where to be found. Guess I'm backing up some data and formatting off fedora. tongue.gif

Relevant LVM info; Warning: Spoiler! (Click to show)
nyxcharon@Guinness ~ $ sudo pvdisplay
[sudo] password for nyxcharon:
--- Physical volume ---
PV Name /dev/sdb3
VG Name vg_dom0
PV Size 231.05 GiB / not usable 24.00 MiB
Allocatable yes (but full)
PE Size 32.00 MiB
Total PE 7393
Free PE 0
Allocated PE 7393
PV UUID WC1cKc-n9t9-7MqG-ocNb-oaC4-B2Y2-bVeZKK

--- Physical volume ---
PV Name /dev/sda2
VG Name vg_dom0
PV Size 146.61 GiB / not usable 20.00 MiB
Allocatable yes
PE Size 32.00 MiB
Total PE 4691
Free PE 211
Allocated PE 4480
PV UUID 9irRft-dSum-c860-D0Kt-NCEU-tFEF-DNH9CB

nyxcharon@Guinness ~ $ sudo lvdisplay
--- Logical volume ---
LV Path /dev/vg_dom0/domUa
LV Name domUa
VG Name vg_dom0
LV UUID vg3np4-561j-QSOG-Rcmc-bneg-j3tZ-YvUhcz
LV Write Access read/write
LV Creation host, time dom0.xenhost, 2012-11-12 13:28:31 -0500
LV Status available
# open 0
LV Size 182.19 GiB
Current LE 5830
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:0

--- Logical volume ---
LV Path /dev/vg_dom0/dom0
LV Name dom0
VG Name vg_dom0
LV UUID tyjtXB-gy8f-YVom-WRYN-0RoJ-zKRY-OcM2TO
LV Write Access read/write
LV Creation host, time dom0.xenhost, 2012-11-12 13:28:34 -0500
LV Status available
# open 0
LV Size 48.84 GiB
Current LE 1563
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:1

--- Logical volume ---
LV Path /dev/vg_dom0/lvol0
LV Name lvol0
VG Name vg_dom0
LV UUID L61w0u-znMD-ZxnX-PrZX-eg3e-faFP-Iv2Yj5
LV Write Access read/write
LV Creation host, time dom0.xenhost, 2012-12-09 11:52:27 -0500
LV Status available
# open 0
LV Size 140.00 GiB
Current LE 4480
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:2

Edited by nyxcharon - 12/23/12 at 11:55am
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post #387 of 824
I don't think it's worth it with F18 around the corner, but F16 is about 2 months away from EOL so the guide could be updated use Fedora 18 when it hits stable in a couple of weeks. Just a thought. You could even use the beta now so it would almost certainly work with stable (they are mainly just bug hunting, mostly on fedup and anaconda)
post #388 of 824
Thread Starter 
Quote:
Originally Posted by jrl1357 View Post

I don't think it's worth it with F18 around the corner, but F16 is about 2 months away from EOL so the guide could be updated use Fedora 18 when it hits stable in a couple of weeks. Just a thought. You could even use the beta now so it would almost certainly work with stable (they are mainly just bug hunting, mostly on fedup and anaconda)

That is a good idea, but I am currently trying to migrate to centos 6.3. The problem I am having is getting a livecd created with all the proper packages and scripts. I am using livecd-tools, but kickstarts for centos 6.3 are almost impossible to find and the livecd-creator --based-on flag does not work for me. If you have any information on how this works, it would be great. If not, I may have to compile xen 4.2 from source in a f18 kickstart.

With the holidays and work I am pretty busy, but hopefully I will have something soon
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post #389 of 824
Quote:
Originally Posted by nyxcharon View Post

So, I cheated a bit, but I got this working on Linux Mint as well. It should be said, I just copied my config file over from fedora and used the pre made logical volume I had with windows already on it. tongue.gif
Also, I didn't have to bridge my network again, just like in fedora which I thought was strange.
Question for those of you who are experienced with LVM: What happens if I format off fedora(which is where I made all my volumes)?
I'd much rather use Mint if possible. I'm going to make a new windows VM now to make sure everything is working, but If i can just format off fedora and use mint i'd be pretty happy. tongue.gif
EDIT: So, I made a new VM in Mint with windows and had no issues, and that naggy bluescreen from the last time I tried this is no where to be found. Guess I'm backing up some data and formatting off fedora. tongue.gif
Relevant LVM info; Warning: Spoiler! (Click to show)
nyxcharon@Guinness ~ $ sudo pvdisplay
[sudo] password for nyxcharon:
--- Physical volume ---
PV Name /dev/sdb3
VG Name vg_dom0
PV Size 231.05 GiB / not usable 24.00 MiB
Allocatable yes (but full)
PE Size 32.00 MiB
Total PE 7393
Free PE 0
Allocated PE 7393
PV UUID WC1cKc-n9t9-7MqG-ocNb-oaC4-B2Y2-bVeZKK

--- Physical volume ---
PV Name /dev/sda2
VG Name vg_dom0
PV Size 146.61 GiB / not usable 20.00 MiB
Allocatable yes
PE Size 32.00 MiB
Total PE 4691
Free PE 211
Allocated PE 4480
PV UUID 9irRft-dSum-c860-D0Kt-NCEU-tFEF-DNH9CB

nyxcharon@Guinness ~ $ sudo lvdisplay
--- Logical volume ---
LV Path /dev/vg_dom0/domUa
LV Name domUa
VG Name vg_dom0
LV UUID vg3np4-561j-QSOG-Rcmc-bneg-j3tZ-YvUhcz
LV Write Access read/write
LV Creation host, time dom0.xenhost, 2012-11-12 13:28:31 -0500
LV Status available
# open 0
LV Size 182.19 GiB
Current LE 5830
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:0

--- Logical volume ---
LV Path /dev/vg_dom0/dom0
LV Name dom0
VG Name vg_dom0
LV UUID tyjtXB-gy8f-YVom-WRYN-0RoJ-zKRY-OcM2TO
LV Write Access read/write
LV Creation host, time dom0.xenhost, 2012-11-12 13:28:34 -0500
LV Status available
# open 0
LV Size 48.84 GiB
Current LE 1563
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:1

--- Logical volume ---
LV Path /dev/vg_dom0/lvol0
LV Name lvol0
VG Name vg_dom0
LV UUID L61w0u-znMD-ZxnX-PrZX-eg3e-faFP-Iv2Yj5
LV Write Access read/write
LV Creation host, time dom0.xenhost, 2012-12-09 11:52:27 -0500
LV Status available
# open 0
LV Size 140.00 GiB
Current LE 4480
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:2

It doesn't matter if you create LVM volumes in Fedora, Ubuntu, Suse or whatever - they are all the same. As long as you make sure LVM support is available when booting. In Linux Mint 14 it should be available by default, in Linux Mint 13 it wasn't and required some workaround.

I suppose you had installed the required packages on Linux Mint? Which LM release are you running?

Also, did you need to create some links (ln -s ...)?

I like your approach of creating the Windows domU under Fedora and then just running it from Linux Mint (though I guess you already performed the necessary steps/package installations before running the Windows domU).
post #390 of 824
Quote:
Originally Posted by dizzy4 View Post

Quote:
Originally Posted by jrl1357 View Post

I don't think it's worth it with F18 around the corner, but F16 is about 2 months away from EOL so the guide could be updated use Fedora 18 when it hits stable in a couple of weeks. Just a thought. You could even use the beta now so it would almost certainly work with stable (they are mainly just bug hunting, mostly on fedup and anaconda)

That is a good idea, but I am currently trying to migrate to centos 6.3. The problem I am having is getting a livecd created with all the proper packages and scripts. I am using livecd-tools, but kickstarts for centos 6.3 are almost impossible to find and the livecd-creator --based-on flag does not work for me. If you have any information on how this works, it would be great. If not, I may have to compile xen 4.2 from source in a f18 kickstart.

With the holidays and work I am pretty busy, but hopefully I will have something soon


I've been avoiding working with kickstarts since I switched to fedora- I have absolutely no idea where to even start. I'm really counting on the new fedup thing, although I suppose I will have to buckle down and learn how to make a kickstart at some point.
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