DMA in PCIe® Switches Application Note AN-714
●Introduction：
■With the increases in PCIe® bus speeds and system performance requirements, the ability to utilize thePCIe bus bandwidth without adding additional load to the host CPU becomes increasingly more important.A simple PCIe GigE NIC solves this problem by integrating a simple DMA engine, allowing for maximumdata throughput with minimum host CPU overhead. Of course, this DMA engine is dedicated to the NIC,which makes it useless when it comes to transferring data to or from other endpoints in the system. AsPCIe-based system topologies become more popular, there is a growing need for a generic method tomove large amounts of data quickly between the root complex and the endpoints, or between multipleendpoints. The solution to this problem is to integrate flexible DMA engines directly into the PCIe switch.
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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August 18, 2009 |
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AN-714 |
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655 KB |
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