Originally posted by curaga
View Post
QEMU 1.5 Supports VGA Passthrough, Better USB 3.0
Collapse
X
-
Originally posted by uid313 View PostOh, so basically this is useless.
I think 1 thing people should be aware of is if this VGA passthrough is anything like the one from other VMs, IOMMU support will be needed, which is a relatively uncommon feature.
Comment
-
-
Originally posted by schmidtbag View PostI think 1 thing people should be aware of is if this VGA passthrough is anything like the one from other VMs, IOMMU support will be needed, which is a relatively uncommon feature.
Comment
-
-
Originally posted by GreatEmerald View PostGot that covered. It's called VT-d on Intel and AMD-Vi on AMD. And it's not really that uncommon on current hardware.
I have 4 motherboards here all with IOMMU mode and it doesn't work on any of them.
Comment
-
-
Originally posted by GreatEmerald View PostGot that covered. It's called VT-d on Intel and AMD-Vi on AMD. And it's not really that uncommon on current hardware.
It's similar to the situation with ECC. For intel it's mostly Xeon processors that support it. Strangely enough, there are some Pentium/Core-i3 processors that support it too but need the appropriate mainboard (C200 series chipset) which quite a bit more expensive. AMD AM3+ processors support ECC but there are some motherboards that don't. I imagine they just lack the traces to the additional pins for the ECC DIMM. But finding trustworthy information is quite hard. Apparently, most people dont give a shit about IOMMU/ECC. They need to know what they are first...
Comment
-
-
Originally posted by schmidtbag View PostWhy is this useless? Most x86 based computers today have an IGP and a discrete GPU, yet one of them is almost always inactive. Give the better one to your VM and problem solved.
I'm just waiting to see whether this can apply more broadly or split a single GPU's resources. My guess is that it's either non-trivial or it's basically impossible without the right graphics chip architecture.
Comment
-
-
Originally posted by kobblestown View PostOh, I think it's quite uncommon. Especially on Intel processors. You need a Xeon processor and the corresponding mainboard. For AMD also not all chipsets support it. Which is rather strange, because I would have though it's enough for the processor to support it, since the memory controller is now part of the processor. In any case, it's often hard to find out whether particular mainboard supports it. I often have to download the manual to take a look at the BIOS options.
I also have a MSI B75A-G43 motherboard, and guess what, it supports VT-d as well. Even some Core 2 motherboards support it. So it's again not uncommon, although it's true that it's usually not advertised that much.Last edited by GreatEmerald; 21 May 2013, 12:32 PM.
Comment
-
-
@sonicspectre
Well the only way to divide GPU power between a VM is through the old method of creating a virtual GPU, which we all know is limiting and doesn't perform all that great.
Originally posted by GreatEmerald View PostWhat are you talking about? I have an i5-3470, and it supports VT-d. It's fairly high-end, but by far not uncommon, and definitely not a Xeon. Other processors that support it are i5-3550, i5-3330, i5-2500... Heck, even in i5-680 supports it. It's not uncommon in the slightest.
I also have a MSI B75A-G43 motherboard, and guess what, it supports VT-d as well. And even some Core 2 motherboards support it. So it's again not uncommon.
This list is relatively small. Albeit, the motherboard sections are a bit incomplete. My motherboard is one of the only AMD desktop boards with IOMMU support and it isn't on this list (890FX chipset).Last edited by schmidtbag; 21 May 2013, 12:37 PM.
Comment
-
Comment