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Expressing and Enforcing Timing Constraints in a Dynamic Real-Time CORBA System [chapter]

Victor Fay Wolfe, Lisa Cingiser Dipippo, Roman Ginis, Michael Squadrito, Steven Wohlever, Igor Zykh, Russell Johnston
1999 Operating Systems and Services  
This paper describes a Dynamic Real-Time CORBA system, which supports the expression and enforcement of end-to-end timing constraints as an extension to a commercial CORBA system.  ...  The paper also describes performance tests that demonstrate the system's ability t o enforce expressed timing constraints.  ...  We also thank the members of the OMG Real-Time Special Interest Group for their dedicated and sound work in deriving the Real-Time CORBA speci cation.  ... 
doi:10.1007/978-1-4615-5041-9_5 fatcat:wsn3vo7qqzhe7orseapoxbjrai

Real-time CORBA

B. Thuraisingham, P. Kortmann, R. Johnson, G. Cooper, L.C. DiPippo, V. Fay-Wolfe
2000 IEEE Transactions on Parallel and Distributed Systems  
This paper presents a survey of results in developing Real-Time CORBA, a standard for real-time management of distributed objects.  ...  distributed real-time computing that have been produced in the research community.  ...  Many people have contributed indirectly to this paper due to their ground-breaking work in developing Real-Time CORBA; we mention some of them here.  ... 
doi:10.1109/71.888646 fatcat:zfom5vtvl5d65ccr5ubsoi533u

RapidSched: static scheduling and analysis for real-time CORBA

Wolfe, DiPippo, Bethmag, Cooper, Johnston, Kortmann, Watson, Wohlever
1999 Engineering Solutions for the Next Millennium 1999 IEEE Canadian Conference on Electrical and Computer Engineering (Cat No 99TH8411) CCECE-99  
RapidSched uses a global, distributed deadline monotonic priority assignment, enforcement of priorities by commercial real-time operating systems, and distributed priority ceiling resource management.  ...  This paper presents a real-time CORBA Scheduling Service called RapidSched.  ...  Previous work at the University of Rhode Island and the SPAWAR Systems Center has developed a dynamic real-time CORBA system [8] that provides expression and best-effort end-to-end enforcement of soft  ... 
doi:10.1109/words.1999.806558 dblp:conf/words/WolfeDBCJKWW99 fatcat:pie2poz5jvar5bjppszga5nonq

Real-Time CORBA Middleware [chapter]

Arvind S. Krishna, Douglas C. Schmidt, Raymond Klefstad, Angelo Corsaro
2005 Middleware for Communications  
When combined with a quality real-time OS foundation, well-tuned implementations of Real-time CORBA can meet the QoS needs of DRE systems and, at the same time, offer the development benefits of middleware  ...  In addition to the needs of desktop and enterprise systems, DRE systems impose stringent quality of service (QoS) constraints.  ...  The system supports expression and enforcement of dynamic end-to-end timing constraints through timed distributed method invocations (TDMIs) Fay- Wolfe et al. (1995) .  ... 
doi:10.1002/0470862084.ch17 fatcat:qkyenmj7vvfz7bc5lt4gza6sxq

Resource virtualization in real-time CORBA middleware

Christopher D. Gill
2006 Proceedings of the 4th international conference on Hardware/software codesign and system synthesis - CODES+ISSS '06  
Providing such a consistent virtualization in distributed real-time and embedded systems becomes increasingly challenging due to application constraints such as timeliness and resource constraints such  ...  This paper describes several examples of real-time CORBA middleware and examines how different constraints impact the way in which resources are virtualized in each case.  ...  Real-time CORBA 1.0 specification [40] vs. dynamically scheduled (deadline, laxity, utility, etc. based) systems supported by the Real-time CORBA 1.2 (briefly called 2.0) specification [38] .  ... 
doi:10.1145/1176254.1176299 dblp:conf/codes/Gill06 fatcat:t2iygl7vwngvheppkc5vintcce

Scheduling and Priority Mapping for Static Real-Time Middleware [chapter]

Lisa Cingiser Dipippo, Victor Fay Wolfe, Levon Esibov, Gregory Cooper, Ramachandra Bethmangalkar, Russell Johnston, Bhavani Thuraisingham, John Mauer
2001 Challenges in Design and Implementation of Middlewares for Real-Time Systems  
This paper also presents the implementation of these real-time middleware scheduling techniques in a Scheduling Service that meets the interface proposed for such a service in the Real-Time CORBA 1.0 standard  ...  real-time operating systems.  ...  Previous work at the University of Rhode Island has developed a dynamic real-time CORBA system (DiPippo, 1999) that provides expression and best-effort end-to-end enforcement of soft real-time client method  ... 
doi:10.1007/978-1-4615-1695-8_3 fatcat:sga7wjrdbbenpc6guszeuptlsy

Q-SCA: Incorporating QoS support into software communications architecture for SDR waveform processing

Jaesoo Lee, Saehwa Kim, Jiyong Park, Seongsoo Hong
2006 Real-time systems  
While SDR is heavily involved in real-time signal processing, the current SCA lacks QoS capabilities in terms of both QoS specification and enforcement.  ...  are used throughout the application instantiation process, and (3) introducing a mechanism to enforce the result of the resource allocation.  ...  They form a very attractive application domain for Q-SCA since they are extremely complex distributed real-time systems with stringent real-time constraints and a high degree of software reconfigurability  ... 
doi:10.1007/s11241-006-6739-5 fatcat:gr3cz3cczzdcvfcgntq7ovcptu

Formal design constraints

Nils Klarlund, Jari Koistinen, Michael I. Schwartzbach
1996 SIGPLAN notices  
The characteristics of a platform and an application architecture are expressed as a set of general design constraints.  ...  Large software systems are often built on system platforms that support or enforce speci c characteristics of the source code or actual design.  ...  Dynamic properties are checked or enforced during runtime. Static properties are enforced during compilation time by viewing the system under development as a collection of objects.  ... 
doi:10.1145/236338.236376 fatcat:orhqvapgpjalfb2sefvfddnljy

Formal design constraints

Nils Klarlund, Jari Koistinen, Michael I. Schwartzbach
1996 Proceedings of the 11th ACM SIGPLAN conference on Object-oriented programming, systems, languages, and applications - OOPSLA '96  
The characteristics of a platform and an application architecture are expressed as a set of general design constraints.  ...  Large software systems are often built on system platforms that support or enforce speci c characteristics of the source code or actual design.  ...  Dynamic properties are checked or enforced during runtime. Static properties are enforced during compilation time by viewing the system under development as a collection of objects.  ... 
doi:10.1145/236337.236376 dblp:conf/oopsla/KlarlundKS96 fatcat:5u2beok2trd4rmwr3k6ikg6kce

The Design and Performance of a Real-Time CORBA Scheduling Service [chapter]

Christopher D. Gill, David L. Levine, Douglas C. Schmidt
2001 Challenges in Design and Implementation of Middlewares for Real-Time Systems  
Second, we describe the flexible scheduling service framework in our real-time CORBA implementation, TAO, which efficiently supports core scheduling strategies like RMS, EDF, MLF, and MUF.  ...  However, conventional CORBA middleware does not define standard features to dynamically schedule operations for applications that possess deterministic and/or statistical real-time requirements.  ...  Acknowledgments This work was funded in part by Boeing. We gratefully acknowledge the support and direction of the Boeing Principal  ... 
doi:10.1007/978-1-4615-1695-8_2 fatcat:t34rfj73grfj7oyal5djxahea4

Distributed real-time specification for Java

Jonathan S. Anderson, E. Douglas Jensen
2006 Proceedings of the 4th international workshop on Java technologies for real-time and embedded systems - JTRES '06  
systems in Java.  ...  In particular, we present an approach to integrating the distributable threads programming model with the Real-Time Specification for Java and discuss the ramifications for composing distributed, real-time  ...  Particular thanks are due Apogee Software for their generous donation of engineering support for their DRTSJ-compliant Aphelion Real-Time JVM.  ... 
doi:10.1145/1167999.1168002 fatcat:eshfqzxmnbe5vgvbhs32wcvfhy

Napoleon

D. Thomsen, R. O'Brien, C. Payne
1999 Proceedings of the fourth ACM workshop on Role-based access control - RBAC '99  
Napoleon consists of three parts; a model for specifying security policies for a heterogeneous set of network resources: a graphical tool for manipulating the model and software to translate the policy  ...  This paper focuses on how the layered policy approach in the Napoleon model has been generalized to allow for adding additional layers.  ...  As a result they do not have a great deal of time to devote to learning a new tool, and in particular they do not have time to design a role hierarchy.  ... 
doi:10.1145/319171.319185 dblp:conf/rbac/ThomsenOP99 fatcat:gnsnnolhyjddtb3npb73vhszvu

Evaluating policies and mechanisms to support distributed real-time applications with CORBA

Carlos O'Ryan, Douglas C. Schmidt, Fred Kuhns, Marina Spivak, Jeff Parsons, Irfan Pyarali, David L. Levine
2001 Concurrency and Computation  
levels in distributed and embedded real-time systems.  ...  The Real-time CORBA specification in CORBA 2.4 focuses on operating systems that allow applications to specify scheduling priorities and policies.  ...  The system supports expression and enforcement of dynamic end-to-end timing constraints through timed distributed operation invocations (TDMIs) [41] . A TDMI corresponds to TAO's RT Operation [5] .  ... 
doi:10.1002/cpe.558 fatcat:dwkvmjsdvrds3csl6us4cuz6ru

Evaluating and Optimizing Thread Pool Strategies for Real-Time CORBA

Irfan Pyarali, Marina Spivak, Ron Cytron, Douglas C. Schmidt
2001 Proceedings of the ACM SIGPLAN workshop on Languages, compilers and tools for embedded systems - LCTES '01  
To facilitate this common requirement, the Real-Time CORBA (RT-CORBA) specification defines standard middleware features that support end-to-end predictability for operations in such applications.  ...  Strict control over the scheduling and execution of processor resources is essential for many fixed-priority real-time applications.  ...  The system supports expression and enforcement of dynamic end-to-end timing constraints through timed distributed operation invocations (TDMIs) [21] .  ... 
doi:10.1145/384197.384226 dblp:conf/lctrts/PyaraliSCS01 fatcat:43gxdlkw6fht3phvks7esu2h2i

Integrating Security Policies via Container Portable Interceptors

T. Ritter, R. Schreiner, U. Lang
2006 IEEE Distributed Systems Online  
We designed and developed a security framework, integrated it into the CORBA Component Model 1 middleware platform, and evaluated it in a real-world project.  ...  A facet of a CORBA component in a server role can be connected to a receptacle of a CORBA component in a client role.  ...  The policy, expressed in a PDL text file, is compiled and loaded into the policy repository.  ... 
doi:10.1109/mdso.2006.44 fatcat:pcpm4ijve5cqnnpdnrfeqmpc3q
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