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Archives for May 29, 2013

May 29, 2013, Filed Under: Accelerated Computing, Computer Hardware, Linux

Notes on Cached Access to Memory-Mapped IO Regions

When attempting to build heterogeneous computers with “accelerators” or “coprocessors” on PCIe interfaces, one quickly runs into asymmetries between the data transfer capabilities of processors and IO devices.  These asymmetries are often surprising — the tremendously complex processor is actually less capable of generating precisely controlled high-performance IO transactions than… read more 

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