RTEMS | Draft: SMP: Add support for the DPCP locking protocol (!1508)

Ivy Zhuang (@purple-affogato) gitlab at rtems.org
Thu Sep 24 06:54:02 UTC 2026



Ivy Zhuang created a merge request: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1508

Project:Branches: purple-affogato/rtems-fork:add_dpcp to rtems/rtos/rtems:main
Author: Ivy Zhuang

## Summary

Add support for the Distributed Priority Ceiling Protocol (MPCP) to RTEMS for use in SMP configurations. The original implementation of DPCP to RTEMS comes from [Supporting Multiprocessor Resource Synchronization Protocols in RTEMS](https://arxiv.org/pdf/2104.06366) by Junjie Shi, Jan Duy Thien Pham, Malte Muench, Jan Viktor Hafemeister, Jian-Jia Chen, and Kuan-Hsun Chen.

The first commit of this MR contains the changes for DPCP from the research found in this [GitHub repository](https://github.com/JJShi92/RTEMS-Resource-Synchronization-Protocols).

Beyond that, this MR adds support for DPCP to the semaphore manager, smpdpcp01 in smptests to test the DPCP implementation, and updates to the DPCP implementation.

Updates #4612

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/1508
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