This Article 
   
 Share 
   
 Bibliographic References 
   
 Add to: 
 
Digg
Furl
Spurl
Blink
Simpy
Google
Del.icio.us
Y!MyWeb
 
 Search 
   
RT-CRM: Real-Time Channel-Based Reflective Memory
November 2000 (vol. 49 no. 11)
pp. 1202-1214

Abstract—In this paper, we propose and present Real-Time Channel-based Reflective Memory (RT-CRM)—a useful programming model and middleware communication service for constructing distributed real-time applications on platforms, open systems. RT-CRM provides remote real-time data reflection abstraction using a simple writer-push model. This writer-push approach enables us to easily decouple the QoS characteristics of the writers from that of the readers. This decoupling is crucial in supporting different kinds of remote data transfer and access needs that one often finds in distributed real-time systems. We will describe the design of RT-CRM, along with a set of easy-to-use API to access the RT-CRM service. We have implemented RT-CRM as part of a larger real-time middleware project, MidART. We address many of the important implementation issues, including buffer management and QoS support. We demonstrate the feasiblity of RT-CRM through a discussion of our application programming support and performance data.

[1] A. Raha, S. Kamat, and W. Zhao, “Admission Control for Hard Real-Time Connections in ATM LAN's,” Proc. IEEE Infocom '96, Mar. 1996.
[2] C. Amza, A.L. Cox, S. Dwarkadas, P. Keleher, H. Lu, R. Rajamony, W. Yu, and W. Zwaenepoel, “TreadMarks: Shared Memory Computing on Networks of Workstations,” Computer, vol. 29, no. 2, Feb. 1996.
[3] C. Shen, “MidART: Middleware for Distributed Real-Time Systems,” www.merl.com/projectsmidart, 1999.
[4] S.T. Chung, O. Gonzalez, K. Ramamritham, and C. Shen, “CReMeS: A CORBA Compliant Reflective Memory Based Real-time Communication Service,” Proc. IEEE Real-Time Systems Symp., Nov. 2000.
[5] C.L. Liu and J.W. Layland, “Scheduling Algorithms for Multiprogramming in a Hard Real-Time Environment,” J. ACM, vol. 20, no. 1, pp. 40-61, 1973.
[6] D. Ferrari and D.C. Verma,“A scheme for real-time channel establishment in wide-area networks, IEEE J. Selected Areas in Comm., vol. 8, no. 3, pp. 368-379, Apr. 1990.
[7] Digital Equiqment Corp., “Memory Channel Overview,” www.unix.digital.com/bin/textit/cluster/ memchanlmemchanl.html, 29 May 1996.
[8] O. Gonzalez, C. Shen, I. Mizunuma, and M. Takegaki, “Implementation and Performance of MidART,” Proc. IEEE Workshop Middleware for Distributed Real-Time Systems and Services, Dec. 1997.
[9] A. Mehra, A. Indiresan, and K.G. Shin, “Resource Management for Real-Time Communication: Making Theory Meet Practice,” Proc. IEEE Real-Time Technology and Applications Symp., pp. 130–138, 1996.
[10] I. Mizunuma, C. Shen, and M. Takegaki, “Middleware for Distributed Industrial Real-Time Systems on ATM Networks,” Proc. 17th IEEE Real-Time Systems Symp., Dec. 1996.
[11] R. Osborne, Q. Zheng, J. Howard, R. Casley, D. Hahn, and T. Nakabayashi, “DART—A Low Overhead ATM Network Interface Chip,” Proc. Hot Interconnects 96, Aug. 1996.
[12] R. Rajkumar, Synchronization in Real-Time Systems: A Priority Inheritance Approach. Norwell,Mass.: Kluwer Academic, 1991.
[13] R. Rajkuma, M. Gagliardi, and L. Sha, “The Real-Time Publisher/Subscriber Inter-Process Communication Model for Distributed Real-Time Systems: Design and Implementation,” Proc. IEEE Real-Time Technology and Applications Symp., May 1995.
[14] S. Bocking, “Sockets++: A Uniform Application Programming Interface for Basic-Level Communication Services,” IEEE Comm. Magazine, vol. 34, no. 12, Dec. 1996.
[15] C. Shen, O. Gonzalez, K. Ramamritham, and I. Mizunuma, “User Level Scheduling of Communicating Real-Time Tasks,” Proc. IEEE Real-Time Technology and Applications Symp., June 1999.
[16] VME Microsystems Int'l Corp., “Reflective Memory Network,” white paper, Feb. 1996.
[17] Q. Zheng, T. Yokotani, T. Ichihashi, and Y. Nemoto, “Connection Admission Control for Hard Real-Time Communication in ATM Networks,” 17th Int'l Conf. Distributed Computing Systems, submitted, 1997.

Index Terms:
Real-time communication service, data distribution, monitor and control, distributed real-time systems.
Citation:
"RT-CRM: Real-Time Channel-Based Reflective Memory," IEEE Transactions on Computers, vol. 49, no. 11, pp. 1202-1214, Nov. 2000, doi:10.1109/12.895937
Usage of this product signifies your acceptance of the Terms of Use.