比如，当VM以内核模式执行代码时；为了正确地仿真VM的虚拟cpu, VMWare必须谨慎地转换内存映射和权限。

Such as when the VM executes code in kernel mode; then VMWare has to carefully translate the memory mapping and permissions in order to simulate the VM's virtual CPU correctly.

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PPE可以通过在内核模式中使用内存映射寄存器来发起dma传输，而SPE则可以使用在SPU上运行的代码来写入dma通道。

The ppe does this through memory-mapped register access from kernel mode, while the SPE writes to its DMA channels from code running on the SPU.

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例如，在分布式平台中，使用映射-规约模式加上内存数据库；在System Z中，进行联合部署以实现对企业数据的访问。

For example, on distributed platforms, map-reduce coupled with in-memory databases; on System Z, co-deploy for access to enterprise data.

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