and the application knowledge to take bet-ter memory management, scheduling and load-balancing decisions. We show that, when we consider the default Erlang VM as the base-line, the modified VM can achieve performance improvements up to a factor of 2.50 while limiting the slowdown on the worst case by a factor of 1.15.

Large-scale data centers leverage virtualization technology to achieve excellent resource utilization, scalability, and high availability. Ideally, the performance of an application run-ning inside a virtual machine (VM) shall be independent of co-located applications and VMs that share

(VCPUs) according to the characteristics of soft real-time applications. Besides, considering that PSRT applications may run in a virtual machine (VM) or multiple VMs, we present parallel scheduling, group scheduling and communication-driven group scheduling to accelerate synchronizations

and this plays a major part in defining the performance characteristics of a multicast switch. In any slot, the sum of the number of copies requested by the active inputs of the copy network may exceed the number of output ports and some of the copy requests may need to be dropped or buffered. We first propose

, by fully embracing its characteristics. In this framework, base station multicasts data to a subset of secondary users first by carefully tuning the power. Concurrently, secondary users opportunistically perform cooperative transmissions using locally idle primary channels, in order to mitigate multicast

to be satisfied immediately. In this paper we propose a scheduling method for multiple VM migrations to guarantee the fast completion of those tasks and hence the reduced impacts on system performance. We consider two aspects to achieve that. Firstly we analyze the VM migration behavior and build a simulation

reliability, reduce performance, and increase cooling cost. Thermal optimization for 3D MPSoCs imposes numerous challenges. It is difficult to manage assignment and scheduling of heterogeneous workloads to maintain thermal safety. In addition, the thermal characteristics of 3D MP-SoCs differ from those of 2D

constraint categories based upon its cache access characteristics, considering both prefetch requests and demand requests. Then following heuristic rules, the VCPUs of each VM are scheduled onto appropriate cores subject to cache sharing constraints. We show that the proposed approach can improve performance

m]]l]]s¶D]]¿÷mB]iv]b]oD]m¶¨]iv]§]iv]r]j]t¿rv]]irj]]t]]m] / | ap]]r¿]ÎNy]s¶D]]mb¶r]ix} Û]Ix]]rd]mb]} p—N]t]o%ism] in]ty]m] / || Û]Is]¡uÎc]rN]]riv]nd]p]*N]m]st¶ I always bow to Śri ̄ Śāradāmbā, the limitless ocean of the nectar of compassion, who bears a rosary, a vessel of nectar, the symbol

In presenting this thesis in partial fulfilment of the requirements for a Postgraduate degree