Performance Evaluation of Real-Time Systems

Estimating the number of mispredictions is critically important for estimating the Worst-Case Execution Time for real-time systems. This paper generalizes and improves over previous attempts to provide a safe and tight mispredication count estimate for dynamic branch predictors. The paper gives closed formulas to compute mispredictions in case of simple and nested loops applicable to all variations of two-level adaptive branch predictors in addition to the gshare and gselect predictors. The given formulas are general enough to accommodate predictors with any counter size.

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Field Programmable Gate Array System for IoT Applications

Elmedany¹

2016

IJCNT

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Internet of Things (IoT) becomes an attractive field of research in the last decade. The main objective of IoT is enabling the integration and interconnection of the physical world and the cyber space. The aim of such space is telecommunications of the online world of computer networks and the Internet. The recent advances in sensors network and embedded systems have helped in the development and realization of Internet of Things. In order to provide adapted services to the users, such spaces should operate in a proactive manner and according to the current context. A Field Programmable Gate Array (FPGA) is a programmable chip designed to be configured after manufacturing by a designer or a customer using special computer interface hardware tools. The FPGA configuration is generally specified using a Hardware Description Language (HDL), there are many applications nowadays that are using FPGA-based design as the main controller instead of using ASICs (Application Specific Integrated circuits) design. This paper presents the hardware implementation of an FPGA (Field Programmable Gate Array) based design for IoT (Internet of Things) applications. The main contribution in this paper is to introduce a cost effective design to be used for the applications of IoT, the FPGA based design has been described using VHDL (VHSIC Hardware Description Language), simulated using Xilinx ISE 14.7 software tools, and then implemented on Xilinx Virtex-7 FPGA VC707 Evaluation platform, targeting xc7vx485t-2ffg1761 device.

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Performance Evaluation of Real-Time Systems

Cited by 3 publications

References 31 publications

Analysis and Testing of Key Performance Indexes of Vxworks in Real-Time System

Analysis and Testing of Key Performance Indexes of Vxworks in Real-Time System

Generalized Worst Case Estimation of Misprediction Counts for Dynamic Branch Predictors

Field Programmable Gate Array System for IoT Applications

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