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MCDRAM

Multi-Channel DRAM or MCDRAM is a 3D-stacked DRAM that is used in the Intel Xeon Phi processor codenamed Knights Landing. It is a version of Hybrid Memory Cube developed in partnership with Micron Technology, and a competitor to High Bandwidth Memory.

Programming
The memory can be partitioned at boot time, with some used as cache for more distant DDR, and the remainder mapped into the physical address space. The application can request pages of virtual memory to be assigned to either the distant DDR directly, to the portion of DDR that is cached by the MCDRAM, or to the portion of the MCDRAM that is not being used as cache. One way to do this is via thememkind API. to avoid excessive cache misses. ==References==
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