TY - CONF AB - In this paper, we introduce the Woolcano reconfigurable processor architecture. The architecture is based on the Xilinx Virtex-4 FX FPGA and leverages the Auxiliary Processing Unit (APU) as well as the partial reconfiguration capabilities to provide dynamically reconfigurable custom instructions. We also present a hardware tool flow that automatically translates software functions into custom instructions and a software tool flow that creates binaries using these instructions. While previous research on processors with reconfigurable functional units has been performed predominantly with simulation, the Woolcano architecture allows for exploring dynamic instruction set extension with commercially available hardware. Finally, we present a case study demonstrating a custom floating-point instruction generated with our approach, which achieves a 40x speedup over software-emulated floating-point operations and a 21% speedup over the Xilinx hardware floating-point unit. AU - Grad, Mariusz AU - Plessl, Christian ID - 2263 SN - 1-60132-101-5 T2 - Proc. Int. Conf. on Engineering of Reconfigurable Systems and Algorithms (ERSA) TI - Woolcano: An Architecture and Tool Flow for Dynamic Instruction Set Extension on Xilinx Virtex-4 FX ER - TY - CONF AU - Battré, Dominic AU - Hovestadt, Matthias AU - Kao, Odej AU - Keller, Axel AU - Voss, Kerstin ID - 1974 T2 - Proc. Int. Conf. on Risks and Security of Internet and Systems TI - Quality Assurance of Grid Service Provisioning by Risk Aware Managing of Resource Failures ER - TY - CONF AB - Service Level Agreements (SLAs) have focal importance if the commercial customer should be attracted to the Grid. An SLA-aware resource management system has already been realize, able to fulfill the SLA of jobs even in the case of resource failures. For this, it is able to migrate checkpointed jobs over the Grid. At this, virtual execution environments allow to increase the number of potential migration targets significantly. In this paper we outline the concept of such virtual execution environments and focus on the SLA negotiation aspects. AU - Battré, Dominic AU - Hovestadt, Matthias AU - Kao, Odej AU - Keller, Axel AU - Voss, Kerstin ID - 1975 T2 - Proc. Int. DMTF Academic Alliance Workshop on Systems and Virtualization Management: Standards and New Technologies TI - Virtual Execution Environments and the Negotiation of Service Level Agreements in Grid Systems ER - TY - CONF AB - Abstract: Commercial Grid users demand for contractually fixed QoS levels. Service Level Agreements (SLAs) are powerful instruments for describing such contracts. SLA-aware resource management is the foundation for realizing SLA contracts within the Grid. OpenCCS is such an SLA-aware RMS, using transparent checkpointing to cope with resource outages. It generates a compatibility profile for each checkpoint dataset, so that the job can be resumed even on resources within the Grid. However, only a small number of Grid resources comply to such a profile. This paper describes the concept of virtual execution environments and how they increase the number of potential migration targets.The paper also describes how these virtual execution environments have been implemented within the OpenCCS resource management system. AU - Battré, Dominic AU - Hovestadt, Matthias AU - Kao, Odej AU - Keller, Axel AU - Voss, Kerstin ID - 1976 T2 - Proc. Int. Workshop on Scheduling and Resource Management for Parallel and Distributed Systems TI - Implementation of Virtual Execution Environments for improving SLA-compliant Job Migration in Grids ER - TY - CONF AU - Battré, Dominic AU - Hovestadt, Matthias AU - Kao, Odej AU - Keller, Axel AU - Voss, Kerstin ID - 1978 T2 - Proc. Int. Conf. on Grid Computing and Applications (GCA) TI - Germany, Belgium, France, and Back Again: Job Migration using Globus ER - TY - CONF AB - OpenCCS is an SLA-aware resource management system which uses transparent checkpointing of applications and migration of checkpoint datasets for ensuring SLA-compliance also in case of resource outages. Migration of checkpoints presumes a high grade of compatibility between source and target resource. Hence, even in large Grid systems only a small number of resources are eligible migration targets. This short paper describes the concept of virtual execution environments and how they increase the number of potential migration targets. It will also outline an implementation within OpenCCS. AU - Battré, Dominic AU - Hovestadt, Matthias AU - Kao, Odej AU - Keller, Axel AU - Voss, Kerstin ID - 1980 T2 - Proc. Int. Conf. on Services Computing (SCC) TI - Virtual Execution Environments for ensuring SLA-compliant Job Migration in Grids ER - TY - CONF AB - Contractually fixed service quality levels are mandatory prerequisites for attracting the commercial user to Grid environments. Service Level Agreements (SLAs) are powerful instruments for describing obligations and expectations in such a business relationship. At the level of local resource management systems, checkpointing and restart is an important instrument for realizing fault tolerance and SLA awareness. This paper highlights the concepts of migrating such checkpoint datasets to achieve the goal of SLA compliant job execution. AU - Battré, Dominic AU - Hovestadt, Matthias AU - Kao, Odej AU - Keller, Axel AU - Voss, Kerstin ID - 1981 SN - 978-0-7695-3177-9 T2 - Proc. Int. Conf. on Grid and Pervasive Computing (GPC) TI - Job Migration and Fault Tolerance in SLA-aware Resource Management Systems ER - TY - CONF AU - Battré, Dominic AU - Hovestadt, Matthias AU - Kao, Odej AU - Keller, Axel AU - Voss, Kerstin ED - Gonzalez, T. F. ID - 1983 SN - 978-0-88986-773-4 T2 - Proc. Int. Conf. on Parallel and Distributed Computing and Systems (PDCS) TI - Enhancing SLA Provisioning by Utilizing Profit-Oriented Fault Tolerance ER - TY - GEN AU - Battré, Dominic AU - Hovestadt, Matthias AU - Kao, Odej AU - Keller, Axel AU - Voss, Kerstin ID - 1984 TI - Increasing Fault-tolerance by Introducing Virtual Execution Environments. ER - TY - GEN AU - Hovestadt, Matthias AU - Keller, Axel AU - Voss, Kerstin ID - 1985 T2 - Paderborner Universitätszeitschrift (puz) TI - Paderborn, Belgien, Frankreich und zurück VL - SS 2 ER -