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Upgrade of low priority prefetch requests to high priority real requests in shared memory controller
Upgrade of low priority prefetch requests to high priority real requests in shared memory controller
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机译:在共享内存控制器中将低优先级预取请求升级为高优先级实际请求
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摘要
A prefetch controller implements an upgrade when a real read access request hits the same memory bank and memory address as a previous prefetch request. In response per-memory bank logic promotes the priority of the prefetch request to that of a read request. If the prefetch request is still waiting to win arbitration, this upgrade in priority increases the likelihood of gaining access generally reducing the latency. If the prefetch request had already gained access through arbitration, the upgrade has no effect. This thus generally reduces the latency in completion of a high priority real request when a low priority speculative prefetch was made to the same address.
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