[wdmaudiodev] Re: Audio stack in 32-bit Vista VM guest is MUCH slower than in 64-bit Vista guest

  • From: "Peter Scott" <PScott@xxxxxxxxxxxxxxxxx>
  • To: wdmaudiodev@xxxxxxxxxxxxx
  • Date: Tue, 5 Aug 2008 17:54:46 +0000

Kernel Drivers
Windows File System and Device Driver Consulting

-----Original Message-----
From: Tim Roberts <timr@xxxxxxxxx>

Date: Tue, 05 Aug 2008 09:40:40 
To: <wdmaudiodev@xxxxxxxxxxxxx>
Subject: [wdmaudiodev] Re: Audio stack in 32-bit Vista VM guest is MUCH slower 
than in 64-bit Vista guest

Eugene Muzychenko wrote:
> To debug my kernel-mode code, I use several VMs under VMware
> Workstation (now 6.0.4 but no difference since 5.5) - Windows 2000, XP
> (32 and 64-bit), 2003 (32-bit), Vista (32 and 64-bit). I noticed that
> 32-bit Vista guest works MUCH slower than all other OSes, regardless
> of their bitness. All other OSes, including 64-bit Vista, have good
> performance; 64-bit Vista is slower, of course, but 32-bit Vista is
> VERY slow.

Based on my experience, your last sentence is true even if you aren't
using VMs.

However, I can also tell you that SP1 improves things considerably.
After installing SP1, I no longer dread having to test my drivers on
Vista.  It's almost usable.  If you haven't done so already, I strongly
recommend you install SP1 on these systems.

Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.


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