RTEMS | cpukit: Create DHRL Library for DRAM Latency Mitigation (!1193)

[Chris Johns (@chris)]

Merge request https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1193 was reviewed by Chris Johns

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Chris Johns started a new discussion on cpukit/dhrl/dhrl.c: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1193#note_150641

 > +  }
 > +
 > +  sc = rtems_barrier_create(

This is an RTEMS API call using an `id` so you will see a performance hit related to the `id` lookup compared to a self contained API. If this is to operate in a performance critical area I suggest the barrier API be add to the self contained API set. See [cpukit/include/rtems/thread.h](https://gitlab.rtems.org/rtems/rtos/rtems/-/blob/main/cpukit/include/rtems/thread.h) for the current self contained APIs.


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View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1193
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