Fast boot
摘要
說(shuō)明書(shū)
As used herein, a “continuation” represents the state of a virtual processor. Each continuation:
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- Has processor state (i.e., saved registers, etc.).
- Has a set of performance indicators that guide a scheduler object with information about how to intelligently assign continuations to leaf nodes (e.g., hyperthreads) for execution.
- Has a virtual-processor identifier that indicates the processor the operating system thinks is the physical processor to which this continuation is assigned.
- Has an event on which this continuation is waiting (possibly empty).
- Has a state which includes: “waiting-for-event” or “ready.”
I/O Virtualization
I/O systems observe a similar paradigm to processors and memory. Devices have a physical address in the physical configuration and virtual addresses in the virtual configuration. When migrating computations (described in more detail below), if for example, there are memory buffers associated with I/O operations, the I/O devices used will likely perform better if they are co-located with the memory with which they are associated, and can be moved accordingly.
Resource Maps
Resource maps are used to translate between virtual and physical configurations. The following are three types of resource maps used by enterprise supercomputers in various embodiments.
