Abstract
This paper provides an overview of the real-time additions to Ada 2012 and their implementation status in GNAT. Most of these additions are related to multiprocessors, helping to exploit parallelism in an efficient and predictable way, and this is the area where GNAT has made more progress. There is also execution-time accounting of interrupts that has been added to bare board targets, where that GNAT run-time library has fine-grained control. The area of new scheduling policies is the one which has received less attention in GNAT, because of the lack or required support in underlying operating systems.
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