Info world writes:
"The once and future kernel
Microsoft has been saying for a while now that the Vista kernel has been optimized for multicore computing. Now, with Windows 7, the company's technical evangelists are proudly pointing to the elimination of certain global SMP-locking mechanisms in the updated kernel. However, as Microsoft insiders such as Mark Russinovich are quick to point out, the benefits of these changes won't be felt until core counts climb well beyond today's dual-core and quad-core implementations.
My own testing would seem to corroborate Microsoft's story. If anything, the company is underselling its multicore advantage. Clearly, the optimizations made to the Vista kernel -- both in its original incarnation and in its updated Windows 7 variant -- are having an impact even at the quad-core level. However, better scalability still isn't enough to offset Windows XP's huge performance edge on today's hardware. In fact, it won't be until after Windows 7 has been replaced by the next Windows that the fruit of Microsoft's multicore optimization labors will be fully realized. Then, as we boot our 32- or 64-core netbooks, we can all smile as Microsoft's foresight and perseverance finally start to pay off"