| D. K. Y. Yau and S. Lam, "Migrating sockets for networking with quality of service guarantees, " in International Conference on Network Protocols, Atlanta, Georgia, October 1997. |
....unlike QoS contracts, and require kernel modification. To complement operating system research on QoS sensitive scheduling, several operating system extensions have been developed for QoS sensitive communication. QoS sensitive operating system communication subsystems have been investigated in [76, 86, 148]. QoS guaranteed protocol stack implementation in the user space has been proposed in [54, 78] Real time upcalls (RTUs) 53] were proposed as a mechanism to schedule protocol processing for networked multimedia applications via event based upcalls [38] Rate based flow control of multimedia ....
D. K. Y. Yau and S. Lam, "Migrating sockets for networking with quality of service guarantees, " in International Conference on Network Protocols, Atlanta, Georgia, October 1997.
....refers to providing guarantees on delivered QoS, such as service rate and bandwidth, to selected clients. Performance differentiation refers to giving preferential treatment to some clients over others. While operating system extensions such as capacity reserves [21] and QoS aware sockets [35] would simplify the problem of developing QoS sensitive services, in this paper we take an alternative approach of developing middleware support. The chief advantage of using middleware lies in its portability. Our middleware is usable on most UNIX variants with little or no customization. The ....
.... Heidelberg QoS model [33] V net [8] NetWorld [7] the QoS adaptation model of [3] COMETS Extended Integrated Reference Model (XRM) 16] the OMEGA endpoint architecture [24] and the QoS Broker [23] The design of QoS sensitive operating system communication subsystems has been investigated in [20, 18, 35]. QoSguaranteed protocol stack implementation in the user space has been proposed in [10, 19] Recent research efforts also considered general adaptive resource management frameworks for real time applications with elastic QoS constraints. The Q RAM architecture [27] introduces QoS sensitive ....
D. K. Y. Yau and S. Lam. Migrating sockets for networking with quality of service guarantees. In International Conference on Network Protocols, Atlanta, Georgia, October 1997.
....trains into real applications, and will report on their performance in a later paper. To avoid the effects of priority inversion due to interrupt processing, our scheduler is designed to work best when such processing is reduced to a minimum. Our protocol processing system of Migrating Sockets [26], for example, minimizes the use of interrupts in handling packet arrivals from the network. However, a small amount of performance critical activities, such as periodic system clock ticks for CPU rate control, is still allowed to take place at interrupt priority, higher than the priorities of ....
David K.Y. Yau and Simon S. Lam. Migrating Sockets for networking with quality of service guarantees. Technical Report TR-97-05, The University of Texas at Austin, Austin, Texas, January 1997; an abbreviated version in Proc. ICNP '97, Atlanta, Georgia, October 1997.
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