Task queue management of virtual devices using a plurality of processors
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United States of America Patent
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Jan 13, 2009
Grant Date -
Apr 14, 2005
app pub date -
Sep 25, 2003
filing date -
Sep 25, 2003
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A task queue manager manages the task queues corresponding to virtual devices. When a virtual device function is requested, the task queue manager determines whether an SPU is currently assigned to the virtual device task. If an SPU is already assigned, the request is queued in a task queue being read by the SPU. If an SPU has not been assigned, the task queue manager assigns one of the SPUs to the task queue. The queue manager assigns the task based upon which SPU is least busy as well as whether one of the SPUs recently performed the virtual device function. If an SPU recently performed the virtual device function, it is more likely that the code used to perform the function is still in the SPU's local memory and will not have to be retrieved from shared common memory using DMA operations.
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