C. W. Mercer. \Operating System Resource Reservation for Real-Time and Multimedia Applications." Ph.D. Thesis, Department of Computer Science, Carnegie Mellon University, June 1997  Home/Search   Document Details and Download   Summary   Related Articles   Check

....Layer 5 6 7 switches such as those from Alteon [2] Cisco [10] Foundry [15] at most support only content aware and load balancing request dispatching to a Web server cluster, but not Web server QoS. Several research e orts focused on QoS guarantee for speci c type of resource, such as CPU [25, 6, 16, 29, 8, 19, 17], disk [20, 9, 28] and on shared network link [21, 24, 14] Almost all of these systems can be abstracted into the same implementation framework as described in this paper. In particular, one can show the uid fair queuing model [27] provides the theoretical basis for all these resource ....

C. W. Mercer. \Operating System Resource Reservation for Real-Time and Multimedia Applications." Ph.D. Thesis, Department of Computer Science, Carnegie Mellon University, June 1997

....as those from Alteon [2] Cisco [10] Foundry [15] at most support only content aware and loadbalancing request dispatching to a Web server cluster, but not Web server QoS. Several research efforts focused on QoS guarantee for specific type of resource, such as CPU [25] 6] 16] 29] 8] [19], 17] disk [20] 9] 28] and on shared network link [21] 24] 14] Almost all of these systems can be abstracted into the same implementation framework as described in this paper. In particular, one can show the fluid fair queuing model [27] provides the theoretical basis for all these ....

C. W. Mercer. "Operating System Resource Reservation for Real-Time and Multimedia Applications." Ph.D. Thesis, Department of Computer Science, Carnegie Mellon University, June 1997

....two application threads. 1.3.3 QoS Management Level Quality of Service (QoS) represents a user s expectations for the performance of an application. It has been realized that in order to guarantee any QoS, applications must receive predictable resource allocation from the operating system [54, 10, 39, 59, 49]. Since QoS can change during the execution of the application, the resource allocation from the operating system should also provide flexibility to accommodate the dynamic QoS requirements. The effort of utilizing available resources to satisfy QoS requirements can be largely classified into two ....

....understand the execution patterns of applications that come from various sources or vendors. Without the global knowledge of a dynamic workload where applications could be started and stopped by different users, assigning priority properly to meet al..l the timing constrains is exceedingly difficult [54]. The unpredictable nature of resource requirement of multimedia applications promotes system designers to either conservatively estimate the resource requirement and overbook resources, which can severely under utilize system resources; or to use an average resource requirement, which can ....

[Article contains additional citation context not shown here]

C.W. Mercer. Operating System Resource Reservation for Real-Time and Multimedia Applications. PhD thesis, Carnegie Mellon University, 1997.

....The last item becomes obsolete with a combined best effort real time scheduling system, but even with such a scheme the other drawbacks remain. The scheduling scheme of [12] has also been deployed in a more dynamic environment: Mercer introduced the Processor Capacity Reserves abstraction [15] for measuring and controlling processor usage of real time and multimedia applications under a microkernel architecture [23] One goal of the work was to provide the predictability of real time systems while retaining the flexibility of a timesharing system. While Mercer s and our goals are ....

C. W. Mercer. Operating System Resource Reservation for Real-Time and Multimedia Applications. PhD thesis, School of Computer Science, Carnegie Mellon University Pittsburgh, PA 15213-3890, June 1997.

....break down due to aggressive clients. It is not a complete QoS solution bacouse it only takes into account bandwidth resource which does not necessiraly reflect the real system resource consumption. Several research efforts focused on QoS guarantee for specific type of resource, such as CPU[25, 6, 16, 29, 8, 19, 17], disk[20, 9, 28] and on shared network link[21, 24, 14] Almost all of these systems can be abstracted into the same implementation frmework as described in this thesis. In particular, one can show the fluid fair queuing model[27] provides the theoretical bases for all these resource schedulers. ....

{rtmach} C. W. Mercer. "Operating System Resource Reservation for Real-Time and Multimedia Applications." Ph.D. Thesis, Department of Computer Science, Carnegie Mellon University, June 1997

....through reservation of system s resources. However, they do not provide (1) a mechanism that maps application level metrics to resource requirements in system level metrics, 2) e ective di erentiated QoS for cluster based server systems. 5.1. 6 Processor capacity reserves Mercer et al. [74, 73] designed an operating system abstraction for resource principals called a processor capacity reserve in the context of the Real Time Mach operating system [101] Reserves insulate programs from the timing and execution characteristics of other programs. An application can reserve system ....

C. W. Mercer. Operating System Resource Reservation for Real-Time and Multimedia Applications. PhD thesis, Carnegie Mellon University, June 1997.

....which provide a number of services ( such as a completely preemptable kernel) suited for real time applications. However they all suffer from the drawbacks mentioned earlier for Rialto operating systems. A resource reservation model for real time and multimedia applications is discussed in [15]. Applications reserve resources based on their timing constraints and an enforcement mechanism ensures that they do not overrun their reservation. Thus real time applications are isolated from the temporal properties of other real time and non real time applications. 3. Model of Integrated ....

Clifford W. Mercer, "Operating System Resource Reservation for Real-Time and Multimedia Applications", Ph.D. Thesis, Department of Computer Science, Carnigie Mellon University, June 1997

Online articles have much greater impact   More about CiteSeer.IST   Add search form to your site   Submit documents   Feedback  

CiteSeer.IST - Copyright Penn State and NEC