Development of a CAD for Control Systems using Multicore Processors

近年来，CPU架构发生了重要的转变。当通过提高工作频率来提高CPU速度的方法达到性能极限时，封装多个CPU内核的多核CPU进入了加速技术的主流。然而，要享受多核cpu的好处，支持多核cpu的软件是必不可少的。因此，需要基于该技术开发支持并行计算的软件。同时，由于先进的控制理论给我们带来了更多的计算时间，因此迫切需要控制系统的CAD来帮助我们以更低的价格更有效地进行控制系统的设计。本研究的目的是提出一种利用多核处理器进行高速计算的方法，并开发一种利用多核处理器改进设计过程的控制系统CAD。我们进行了以下工作：利用两个四核处理器构建了一个包含伪八核处理器的计算机系统，并探讨了实现多核处理器高性能的方法。我发现多线程的并行处理对于需要小内存的相对简单的问题具有很高的可扩展性。我们设计了一个并行计算框架，使我们能够动态地选择并行化的方法。该框架允许我们在CPU架构的过渡阶段充分利用CPU的能力。利用多核处理器的能力开发了控制系统cad，并将其应用于控制系统的教学中，验证了软件的有效性。

In recent years, the CPU architecture makes an important transition. While the method which speeds up CPU by raising the operating frequency reaches the performance limits, the multicore CPU which contains multiple CPU cores in a package enters the mainstream for speed-up technique. However, the software which supports multicore CPUS is indispensable for enjoying the benefits of multicore CPUS. Therefore it is required to promote the software which support the parallel computation based on the technology. Meanwhile, since the advanced control theory imposes more time-consuming computation on us, there is a real need for the CAD for control systems which helps us to do the control system design more effectively at a low price. The purpose of this research is to propose a method for high speed computation by using multicore processors and to develop a CAD for control systems which improves the process of the design by utilizing multicore processors. We carried out the following.1. We built a computer system which contains pseudo-octacore processor by using two quad-core processors, and examined the methods to elicit high performance of multicore processors. I found that the parallel processing by multithread achieves the high scalability for relatively-simple problems which require small memory.2. We designed a framework for parallel computation which enables us to select the method for parallelization dynamically. The framework allows us to use the full power of CPU during the transitional phase of the architecture of CPU.3. We developed a cad for control systems which utilizes the power of multicore processors, and applied it to the education of control systems and confirmed the validity of the software.