Poster Abstract: Towards Parallelizing Legacy Embedded Control Software Using the LET Programming Paradigm
Poster Abstract: Towards Parallelizing Legacy Embedded Control Software Using the LET Programming Paradigm
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海报摘要：使用 LET 编程范式实现传统嵌入式控制软件的并行化
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
A. Naderlinger
中科院分区：
文献类型：
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作者：
J. Hennig;H. V. Hasseln;H. Mohammad;S. Resmerita;Stefan Lukesch;A. Naderlinger
只提供摘要形式。汽车应用对计算能力日益增长的需求只能通过嵌入式多核处理器来满足。这些应用程序的重要部分包括oem拥有的遗留软件，这些软件是为单核平台开发的。当OEM面临软件并行化和向ECU供应商指定需求的问题时，后者必须处理在集成系统内实现所需的并行化。逻辑执行时间（LET）范式在一个清晰的概念框架中解决了这些问题。我们在这里给出了在这方面应用LET模型的初始步骤。本工作通过利用其存在的固有并行性，处理传统电动动力系统协调器软件的并行化。应用程序软件保持不变，因为只对中间件进行了调整。采用LET编程模型确保并行化软件具有正确的功能和时间行为，同时为优化并行化提供了空间。时序定义语言（TDL）和相关工具用于指定基于LET的需求，并生成确保LET行为的系统组件。虽然TDL组件的运行时开销仍在评估中，但结果表明，通过选择合适的LET值，所需的缓冲区开销可以保持较小。该工作描述了在AUTOSAR中集成TDL组件的两种概念性方法，通过使用复杂的设备驱动程序或操作系统进度表。接下来的步骤包括对所提出的概念进行原型实现，这将在OEM和供应商之间的合作中完成。随着越来越多的证据表明，LET编程学科作为OEM和供应商之间互动的推动者，我们计划在AUTOSAR中进一步推进LET标准化工作。
Summary form only given. The growing demand for computing power in automotive applications can only be satisfied by embedded multi-core processors. Significant parts of such applications include OEM-owned legacy software, which has been developed for single-core platforms. While the OEM is faced with the issues of parallelizing the software and specifying the requirements to the ECU supplier, the latter has to deal with implementing the required parallelization within the integrated system. The Logical Execution Time (LET) paradigm addresses these concerns in a clear conceptual framework. We present here initial steps for applying the LET model in this respect. This work deals with the parallelization of a legacy electric powertrain coordinator software, by exploiting its existent inherent parallelism. The application software remains unchanged, as adaptations are only made to the middleware. The LET programming model is employed to ensure that the parallelized software has a correct functional and temporal behavior, while giving room for optimizing the parallelization. The Timing Definition Language (TDL) and associated tools are employed to specify LET-based requirements, and to generate system components that ensure LET behavior. While the runtime overhead of TDL components is still under evaluation, it is shown that the required buffer overhead can be kept small by a suitable choosing of LET values. The work describes two conceptual ways for integrating TDL components in AUTOSAR, by using either a complex device driver, or OS schedule tables. Next steps include a prototypical realization of the presented concepts, which will be done in a cooperation between OEM and suppliers. As evidence is gathered on the LET programming discipline's role as a facilitator of interaction between OEM and suppliers, we plan to further pursue LET standardization efforts in AUTOSAR.