Mostafijur Rahman

Performance comparison of Single Board Computer: A case study of kernel on ARM architecture

Due to increase computer hardware technologies, software developers are more focusing on to developing embedded operating system. GNU/Linux becomes a common operating system widely use in embedded technologies. In this paper, we report performance results on a TS-7800 Single Board Computer with different version of kernel that has been released by hardware provider. We compare the performance between operating system with the latest kernel given by hardware provider, Linux kernel (2.6.34) and the previous kernel (2.6.21) Our results indicate that the new kernel has better performance in kernel benchmark, more bandwidth and less latency. In other experiments we found that the results are almost the same and in some cases the kernel (2.6.21) has better performance than the kernel (2.6.34).

Event Driven Input Sequence T-Way Test Strategy Using Simulated Annealing

Exhaustive testing for event driven sequence input interaction is costly and not always practicable for all types of software testing. So, an alternative technique is crucial where optimum/near optimum test case generation is key concern. This paper presents a feasible test suite generation technique using Simulated Annealing (SA) algorithm for Event Driven Input Sequence Testing (EDIST)and called EDIST-SA T-way test strategy. The EDIST-SA technique focuses on a heuristic analysis for generating feasible and near optimum test suite(s), where a cost function carefully initiates acceptable test candidates and a fine-tuned cooling rate with temperature takes part as an iterative perspective. We corroborate on EDIST-SA algorithm by doing a large number of experiments to achieve optimum and/or near optimum test cases from a large number of test candidates. The experimental results are tested on a real application called Embedded Network Traffic Monitoring System (ENTM). Analysis on EDIST-SA strategy shows that the optimum test suite is found from some of the iterated solution and there is possibility to have more feasible accepted test suites.

Development of a framework to reduce overhead on database engine through data distribution

Software driven solutions are limited to the amount of memory size and storage capacity, but the sizes of databases are increasing every day. Hence, now a day, handling data and accessing it in an acceptable time is one of the biggest challenges especially in a large database system. In a database, the records can be categorized according to the access frequencies; some records are very frequently accessed (hot data), some records are hardly accessed (cold data) and other records accessed occasionally (warm data). In a conventional database we keep all hot, warm and cold records in a single database. In case of record access (query, update etc.) a query might takes longer time even if a good data accessing algorithm (clustering/mining) incorporate with the database. Thus categorizing of the data set, i. e. clustering in terms of access frequency may improve data accessibility. In this paper, we are proposing a data clustering mechanism based on data access frequency. Finally, the expected result shows how and why data accessibility time should outperform other available data clustering techniques.

A portable network traffic analyzer

Embedded system is known for its limitation in terms of processing power, memory, and power consumption. Incorporating solution into an embedded system, which requires optimum usage of these limitation, is thus a challenge. The aim of this study is to see how Embedded Linux could cope with those limitations in producing reliable embedded web-based traffic monitoring system. The approach to the study is to adopt a low-end embedded Linux platform and develop a network traffic monitoring system which runs on the platform. Among the functionalities incorporated include capturing and storing network packet information into files, analyzing data statistically and displaying minimal statistical data as well as sending data files through TCP/IP connection to the web based monitoring system. This paper will describe the architectural design and implementation of the network monitoring system. Interesting enough the system proved to be competent, where it manages to provide useful reliable information within its limitation.

An adaptive replication model for heterogeneous systems

Data replication is an increasingly important topic as databases are more and more deployed over distributed systems, grid community and clustering systems. The performance, reliability and portability of entire database may possible by using replication technique. Replication may be considered as a data backup policy. Replication in homogeneous system is common practice in real life, but replication in heterogeneous system is quite challenging, because of the dissimilar computing environment. Since the computer environment porn to be heterogeneous, hence its a promising field for researchers to consider replication in heterogeneous environment. In our research a persistence layer has been proposed for replication in heterogeneous systems. This persistence layer work on asynchronous model, hence it may call as asynchronous replication model. The model works implements multi threading technique for creating parallel connection with peer servers. The main server and replicated server are connected with a common interface. The interface is a replication engine, which intelligently holds data and makes decision depending on different factors for sending data to smoothen the replication process. The whole structure follows the rules of SOA (Service oriented architecture) thus, modification of replication servers do not affect the main server. Finally the architecture of this concept builds on different configurable files. These files help us in system up-gradation without shutting down the system. At the end, some experiments have been carried out and the results have been analyzed.

Embedded system for portable Lecture Recording System: Design and development

E-learning is a new educational concept by using the Internet technology. It delivers the digital content and provides a learner-oriented environment for the teachers and students. The Lecture Recording system is one of the devices that are widely used for E-Learning. However, the existing Lecture Recording system needs to be installed on a PC or Notebook. In this paper, a new design for lecture recording system is presented. It offers a simple equipment set up for lecture recording that will minimize lecturers burden. Furthermore, the recorded lectures will automatically create recorded file in a format that is supported by HTML5. This system is also small in size and portable. This portable lecture recording system allow students to re-experience the lecture session at anytime and anywhere by downloading it or viewing it through the portal. This lecture recording system is user friendly where it can be installed without any additional software. Therefore, it can be a great system for lecturers who are using laptop/net-book for their class presentation.

Test case generation for event driven systems using 4-way input test strategy

Since 1990s Combinatorial explosion is a crucial topic in software testing domain. In this domain the exhaustive input interaction test is not practical solution to test all software configurations for generating test cases. T-way test strategy provides a solution to overcome the problem. To date, most of the research on designing methods focus on combinations of input parameter values, where the T-way test strategy is applied to generate final test cases. However the methods are not applicable for event driven systems, where inputs are tested in the ordered form. In this paper a new method is proposed on T-way strategy to generate test cases using 4-way input interaction technique. The generated test cases are compared with the existing 4-way strategies. Result shows that in most cases the proposed method is able to generate efficient test cases compared with existing 4-way methods.

Design of an embedded data acquisition system for remote application

In recent times, various Data Acquisition Systems (DAS) are available in the market. The basic operation of all DASs are same, only the differences found in terms of hardware architectures, sampling rate, channel supports, costs, user friendly features, etc. This paper proposed an Embedded Data Acquisition System which appealing features are: variable channel supports (2/4/8/32/64), notification sends to admin using Short Message Service (SMS), and web monitoring system which trend to use our system in remote area and named as Embedded Remote Data Acquisition System (ERDAS). In this research, the development phase consists, a Single Board Computer (SBC, TS-7800) as a processing unit, GNU/Linux based Embedded Debian 7 Operating System (OS) as an application development platform and customized kernel module to support 3G modem for notification send/receive to/from the remote area. Results show the developed GUI and accuracy based on CPU and memory usage. We found that the variation of CPU load is 2% to 3% and the memory usage is around 2MB, which conclude that the technically compact designed ERDAS modules are fitting to execute on the low-end embedded hardware and OS.

A portable class Lecture Recording system for E-learning purpose

In a new educational concept, the Lecture Recording system is one of the devices that are widely used to provide educational material to students. Even so, the existing Lecture Recording systems are able to record only one video in real time. If the system is able to record multiple video, the video editing is done after recording time. In this paper, a new design for lecture recording system is introduced. It offers a simple equipment set up for lecture recording that will minimize lecturers burden. Furthermore, the system will edit the video in real time depend on user setting. This system is also small in size and portable. This lecture recording system allows students to re-experience the lecture session at anytime and anywhere by downloading it or viewing it through the portal. This lecture recording system is user friendly where it can be installed without any additional software. Therefore, it can be a great system for lecturers who are using laptops for their class presentation.

Performance evaluation of rank sort parallelism

Parallelism performance is a crucial part for testing algorithmic design in various platforms (not only on multiprocessor but also on multi-computer processor systems). In this paper we demonstrate a comparative parallelism performance outcome from Rank sort algorithm and then compare the parallel and sequential approach of the Rank sort. The divide and conquer approach is used to control a large problem into pieces (called tasks) and send the tasks to some inter-process/multi-computer processor systems for doing some computations and return back the results to the master computer. The master computer then combines all the tasks from working computer and displays the final result. In this research the execution time, speedup time and efficiency matrices are used to find the barrier of Rank sort parallelism.