In recent years, fixed priority real-time scheduling has made significant advances. These advances have been applied primarily to CPU scheduling. While CPU scheduling is an important aspect of real-time designs, other shared system resources require the same attention in order for a system to transfer real-time traffic. This paper addresses one such resource, the system bus, and presents a meth...

P-NET is a multi-master fieldbus standard based on a virtual token passing scheme. In P-NET each master is allowed to transmit only one message per token visit. In the worst-case, the communication response time can be derived considering that, in each token cycle, all stations use the token to transmit a message. In this paper, we define a more sophisticated P-NET model, which considers the ac...

When different type of packets with different needs of Quality of Service (QoS) requirements share the same network resources, it became important to use queue management and scheduling schemes in order to maintain perceived quality at the end users at an acceptable level. Many schemes have been studied in the literature, these schemes use time priority (to maintain QoS for Real Time (RT) packe...

Our concern is the problem of efficiently supporting multiple QOS requirements in ATM networks. A queue manager in ATM network nodes schedules cells’ transmission based on their urgencies at the decision moment, while it controls buffer access based on the cells’ loss priorities. In this paper, we propose a generalized priority queue manager (GPQM) which supports multiple QOS requirements in cl...

This paper investigates the effect of changing priority bonuses of Inter-Core Aggregation Scheduler (IAS). IAS is a kernellevel thread scheduler for commodity Chip Multi-Processing (CMP) platforms. To utilize a shared cache and memory on a CMP platform to enhance the performance, IAS executes sibling threads, kernel-level threads sharing the same memory address space, simultaneously on differen...

Various techniques have been proposed to achieve good QoS for diverse application types at network nodes. In order to supply the various QoS requirements for different kinds of applications, new scheduling policies need to be developed and evaluated. Many scheduling techniques have been proposed to respond to the temporal requirements of real-time flows. We propose a new scheduling Hierarchical...

Virtual screening has proven very effective on grid infrastructures. We focus on finding platform scheduling policy for pilot-agent platform shared by many virtual screening users. They need a suitable scheduling algorithm at platform level to ensure a certain fairness between users. Optimal criterion used in our research is the stretch, a measure for user experience on the platform. From our l...

Machines whose sole function is to re-order their input data are considered. Every such machine defines a set of allowable input-output pairs of permutations. These sets are studied in terms of the minimal disallowed pairs (the basis). Some allowable sets with small bases are considered including the one defined by a priority queue machine. For more complex machines defined by two or more prior...

In wireless environment, the periodic moments of wireless networks may cause the fluctuation of available bandwidth by varying with time and location. The periodic fluctuation disturbs the resource distribution and Quality of Service (QoS). Qos design is the fundamental functionality of the networking router to enable differentiated delivery and to guarantee the delivery quality for different s...

tendency to optimization in last decades has resulted in creating multi-product manufacturing systems. production planning in such systems is difficult, because optimal production volume that is calculated must be consistent with limitation of production system. hence, integration has been proposed to decide about these problems concurrently. main problem in integration is how we can relate pro...