Recently we’ve been considering a hardware refresh for our developer/consultant/architect laptop build (on Windows Server 2008 R2 Standard with Hyper-V). After a fair amount of deliberation we decided to pilot a new model but stumbled massively at the first hurdle: when we enabled the Hyper-V role on a new Dell Latitude E6410 we got a blue screen. Further testing revealed that the graphics driver was at fault and the SVGA driver worked fine. However, the SVGA driver only has single monitor support. Back to the drawing board.
November 17th, 2009
The definitive word on Hyper-V high-end graphics performance
The Microsoft virtualisation team are certainly taking community engagement and transparency seriously these days. I’m happy to report that Ben Armstrong (Virtual PC Guy) has posted the definitive summary of Hyper-V high-end graphics performance issues. He was the first person to discover the issue and has produced most of the guidance on it since. Key things to note:
- It’s not an issue on processors with SLAT, but these are only just hitting the market in laptops in the near future
- It’s not an issue with the SVGA driver
- I’ve asked if the SVGA driver might ever offer multi-monitor support. He’s looking in to it. This might be a great compromise until processors with SLAT become ubiquitous
- This same problem occurs in all native Hypervisors
- Virtual PC and VMWare Workstation do not have the same problem but they are Type 2 hypervisors and do not offer the same performance as Hyper-V
So… there’s still no conclusive solution but it’s good to have the full context of the problem. For more background on why this matters for SharePoint see my previous post on the matter.
September 24th, 2009
Hyper-V graphics performance is on the way… if you need a new laptop
Dell announced today that they are releasing Alienware and Studio laptops with Intel Core i7 processors. Why is this worth regurgitating? The Core i7 processors feature the Nehalem processor microarchitecture, which means that Hyper-V V2 (in Windows Server 2008 R2) can take advantage of SLAT (Second Level Address Translation). SLAT is implemented as EPT (Extended Paging Tables) in Intel technology and NPT (Nested Paging Tables) for AMD. Here’s Microsoft’s summary of the new Hyper-V support for SLAT: read more »