• Journal of Advanced Marine Engineering and Technology
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• v.30 no.2
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• pp.311-318
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• 2006

In this study, the performance tests for single and dual micro processor configurations are performed to investigate how the accelerated OpenGL components and applications are dependent on processor configurations. At present, many major providers of the engineering graphics workstations have recommended that multiprocessors are better than single processor. However, we confirmed that the single processor configuration is more faster and more effective than competitive configurations and suggested the economic method to improve the performance of the engineering graphics workstations.

• The Transactions of the Korea Information Processing Society
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• v.4 no.2
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• pp.377-383
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• 1997

This paper presents the design and the implemenration of a Mutiuser Multimedia Confernce System for synchronous groupwork.The infrastructure of this system is a hybrid srchiercture of centralized and replicated archietctures,that is to maintain sharde information cinsistently and to reduce the overhead of network traffic to the central part.The communication control of data for groupwerk managrment is centralized to the virtual node and the communication control of real data such as audio,video,text is replicated.In order ot provide a realtime audio and video processing,this system uses synamic queues and multithreads.

• Journal of KIISE
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• v.42 no.2
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• pp.155-161
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• 2015

It is difficult and cumbersome to figure out whether a multithread program runs with concurrency bugs, such as data races and atomicity violations, because there are many possible executions of the program and a lot of the defects are hard to reproduce. Hence, monitoring techniques for collecting and analyzing the information from program execution, such as thread executions, memory accesses, and synchronization information, are important to locate data races for debugging multithread programs. This paper presents an efficient and practical monitoring tool, called VcTrace, that analyzes the partial ordering of concurrent threads and events during an execution of the program based on the vector clock system. Empirical results on C/C++ benchmarks using Pthreads show that VcTrace is a sound and practical tool for on-the-fly data race detection as well as for analyzing multithread programs.