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I'm working on a filesystem improving project, and found a paper says the cheating on benchmark, and it gives a solution that use VMs could help others to reproduce our result.

And the question is, if I have made a specific vmware virtual machine, will it runs the same at different computer and platform?

For example, I have a virtual machine which is 1G RAM, 4G HD and 2G one-core CPU.

Will that runs the same at a qual-core 3G CPU and a 2.4G P4?

What if the computer have 4G RAM? Will vmware use some buffer mechanism to improve performance? If that's true, does it means the VM runs on a 2G RAM host will slower than on a 4G host?

Hope you can help me on that, or just told me where could I find the answer.

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1 Answer 1

up vote 2 down vote accepted

You will get different results. VMware workstation (and ESX if ECM isn't turned on) will pass through all of the processor benefits of the host machine. If one is a 2.4 GHz Intel Core 2, and another is a 2.4GHz Intel I5, the I5-based machine will perform a bit differently for certain workloads than the same VM running on a Core2 system.

RAM performance will also pass through, though not quantity since that's restricted by the VM configuration.

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Is there any configure file could limit that? I mean try to disable some feature and make this VM runs the same at different computer? –  bxshi Mar 31 '12 at 2:46
    
@bxshi Not that I'm aware of. ESX has the option in the Enhanced Compatibility Mode, but I don't believe Workstation does. –  sysadmin1138 Mar 31 '12 at 11:40

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