Since the object becomes more and more complicated and the existed data dropout and network-introduced time-delay are random and varying in network control system (NCS), the traditional control method is more and more difficult to obtain a good control effect. In this paper, the iterative learning control (ILC) issue for a class of linear continuous singular network control system (SNCS) with time-delay and data dropout is investigated. According to the λ norm and expectation algorithm, the convergence condition of the system is derived. At last, simulation example shows the effectiveness and superiority of the presented method.
Abstract-This paper introduces the microarchitecture and logical implementation of SMT (Simultaneous Multithreading) improvement of Godson-2 processor which is a 64-bit, four-issue, out-of-order execution high performance processor. The condition for implementing correct memory consistency model in Godson-2 SMT processor is studied and a new register-level sharing and synchronization scheme is proposed. Godson-2 SMT processor has been implemented at the RTL level and simulated with the VstationPro of Mentor Graphics. The Linux operating system is ported to run in Godson-2 SMT processor and application programs such as SPEC CPU2000 benchmark suite are used to evaluate performance. Experimental results indicate that the performance of Godson-2 SMT processor is improved significantly by fully exploiting thread-level parallelism and optimized utilization of functional units. The average speedup is 31.3% with 18.8% area overhead.
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