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HT and Windows OS

post #1 of 5
9/22/03 at 9:45am
Thread Starter 
I'll be using my 5680 primarily for software development. While all of the development will be done from XP Pro, I need to test installation scripts and program operation in previous Windows OSs installed in hard disk partitions. Can I leave HT enabled when using those earlier Windows (2K, 98ME, etc.)?
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post #2 of 5
9/22/03 at 9:51am
There was a thread talking about the issues of HT and Win2k but you might find vmware a better alternative. The only thing I am not sure about with vmware is if it can enable/disable HT on a per virtual machine basis.

Check the I love vmware thread in the Linux sub-forum - laclasse uses vmware and he might know how it works in detail.
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post #3 of 5
9/22/03 at 2:26pm
I've heard good things about VMware. Here at work, however, we use Virtual PC, http://www.connectix.com and http://www.microsoft.com/windowsxp/virtualpc/ . The biggest con is that Microsoft just bought out the company (jealous of the technology or concerned about OS licensing on "temporary" images, dunno which). You can only get a trial evaluation version at the moment until MS produces their own b'tard.

VPC does run on HT hosts and does NOT reproduce HT in the VPC image. It emulates a single CPU, a generic ethernet card, and a very generic (S3?) graphics card. It is GREAT for non-hardware specific testing and troubleshooting. We use it here for testing software installations and troubleshooting the same. Again, we mainly care about the different OSs and not the hardware in our environment.

The main complaint I ever saw in Connectix forums is that you can't emulate SCSI devices (it emulates ATA\IDE HDD). Not a prob for us, unless you want to Ghost a SCSI-based PC to a VPC image. (You can Ghost a PC to a VPC, but not if it's SCSI.)

Good luck.
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post #4 of 5
9/22/03 at 4:19pm
I use VMware for developmental purposes and absolutely love it. I just checked their website, they only support emulation of a single cpu machine.

-Mike
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post #5 of 5
9/22/03 at 4:22pm
Also, those earlier versions of Windows do not support HyperThreading anyways, so there is no need to emulate it.

Your physical computer can and should have HyperThreading enabled. VMware can make use of multiple virtual processors if you intend to run multiple virtual PC's simultaneously.

-Mike
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