ABSTRACT With the spread of the Internet, services that communicate to other services are increasing. Multimedia applications such as video on demand also ask for network Quality of Service (QoS). Thus, operating systems have to guarantee the allocation of computer resources to services. The computer resources are CPU, disk, network devices and so on. We suppose that the communications have to ...

This paper describes experiences in using an O.O. language (Java) in designing, prototyping and evaluating a CPU manager. QoS Animator facilitates the execution of object oriented Java applications with time requirements and provides protection mechanisms to preserve system’ s integrity against untrusted code. It is adapted to the system performance and provides a rate-monotonic based schedulin...

Providing good QoS in Cellular IP networks is one of the important issues in order to improve the performance of the Cellular IP network. Resource reservation is one of the methods used in achieving this goal and is proven to be effective. Resources of Cellular IP network that can be reserved are bandwidth, buffer and CPU cycles. Router CPU cycle is the time taken to process a packet before for...

Minimization of system overhead and jitter is a fundamental challenge in the design and implementation of a Real-Time Operating System (RTOS). Modern FPGA devices, which include (multiple) processor core(s) as diffused IP on the silicon die, provide an excellent platform for embedded systems and offer new opportunities to meet these fundamental RTOS challenges. In particular, it is possible to ...

A high precision interactive planetary rendering system provides an important platform for many GIS applications. This paper presents a novel full-scale planetary rendering solution with a workload that is efficient and balanced on integrated CPU/GPU platforms. Our system generates highly accurate geometry on the fly on CPU and graphics lighting and shading on integrated GPU, while incorporatin...

The Nemesis operating system is designed to provide Quality of Service to applications. Nemesis also allows applications to reserve CPU time and transmit bandwidth on network interfaces. We have implemented a TCP for Nemesis that makes use of these guarantees. We show that the Nemesis transmit scheduler rate-controls TCP traffic and thus leads to predictable traffic behavior when applications c...

Data structure selection and tuning is laborious but can vastly improve application performance and memory footprint. We introduce ARTEMIS a multiobjective, cloud-based optimisation framework that automatically finds optimal, tuned data structures and rewrites applications to use them. ARTEMIS achieves substantial performance improvements for every project in a set of 29 Java programs uniformly...