Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Hypervisors"”.
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Analysis of Performance and Power Aspects of Hypervisors in Soft Real-Time Embedded Systems
… necessitated solutions to secure these systems. Hypervisors are a solution, but the overhead imposed by them needs to be quantitatively understood. Experiments were conducted to quantify the overhead hypervisors impose on soft real-time embedded systems. A soft real-time computer vision algorithm …
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Optimizing Boot Times and Enhancing Binary Compatibility for Unikernels
… such obstacles as unscalable boot procedures in hypervisors and the difficulty in porting native applications to unikernel models. This work presents a solution for the first based on the popular Xen hypervisor, and demonstrates a significant performance benefit when running a large number of …
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Virtual machine detection through Central Processing Unit (CPU) detail anomalies
… inconsistencies exist. In our tests, many of the hypervisors tested possessed inconsistencies that could be used to deduce the presence of a virtual machine.
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Estimating memory locality for virtual machines on NUMA systems
… advantage of such architectures. Type 1 (native) hypervisors, in particular, are required to extract maximum performance from the underlying hardware, as they often run dozens of virtual machines (VMs) on a single system and provide clients with performance guarantees that must be met. While VM …
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Real-Time Hierarchical Scheduling of Virtualized Systems
… interest in virtualization. However, many modern hypervisors do not inherently support the strict timing guarantees of real-time applications. There are several challenges that arise when trying to virtualize a real-time application. One key challenge is to maintain the guest's real-time …
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Lightweight and purpose built hypervisor for malware analysis
… features commonly found in general purpose hypervisors, including virtual device emulation. We take advantage of hardware virtualization support to make MAVMM more simple, secure and transparent. In this thesis, we describe the design and implementation of MAVMM, and the features that we can …
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A Flattened Hierarchical Scheduler for Real-Time Virtual Machines
… to real-time systems. Unfortunately, modern hypervisors have no mechanism in place to guarantee the real-time performance of applications running on virtual machines. Past solutions to this problem rely on either spatial or temporal resource partitioning, both of which under-utilize the …
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Compact integrity-aware architectures
… often injects and executes new code to infect hypervisors, OSs and applications on a wide range of systems, from embedded systems to servers in data centers. In this dissertation, we design and evaluate approaches for remotely attesting software integrity and blocking infections on a variety of …
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Rethinking computer architecture and operating system abstractions for good & evil
… proposes the PageForge extensions to modern hypervisors for scalable page merging in virtualized environments.
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Tracking working set sizes of virtual machines using miss ratio curves
… sampling strategy is used within VMware ESX hypervisors to estimate the working set sizes of VMs. Using this technique, a small number of random pages is selected to form a sample set. Access to these sampled pages is then tracked and the percentage of sampled pages that are accessed is used …
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Can silhouette execution mitigate VM boot storms?
… which we name silhouette execution, would allow hypervisors to use the CPU in a scalable way, much like transparent page sharing allows a hypervisor to use its limited memory in a scalable fashion. To evaluate silhouette execution, we studied user-space instruction streams from a few Linux …
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WiMAX spectrum virtualization and network federation
… (VSEL) is proposed. The VSEL facilitates the VS-Hypervisors in the federated physical base-stations to be able to negotiate and exchange spectrum between themselves to match their spectrum needs. The architectures for WiMAX spectrum virtualization and network federation was modelled and …
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Resilire: Achieving High Availability Through Virtual Machine Live Migration
… VM live migration mechanisms are based on hypervisors. However, hypervisors are increasingly becoming the source of several major security attacks and flaws. We present a mechanism called HSG-LM that does not involve the hypervisor during live migration. HSG-LM is implemented in the guest …
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Browserify: Empowering Consistent and Efficient Application Deployment across Heterogeneous Mobile Devices
… inside browsers. Though slower than native hypervisors, BroswerVM provides acceptable performance to reuse unmodi ed applications that are not computeintensive. Wasmachine is an OS aiming to e ciently and securely execute WebAssembly applications in mobile devices with constrained resources. …
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Providing application-aware reliability through OS/hypervisor-level techniques
Operating systems and hypervisors enable the collection and extraction of rich information on application and system execution characteristics. This thesis describes a Reliability MicroKernel (RMK) architecture, which provides an infrastructure that enables the design and deployment of software …
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On Improving the Security of Virtualized Systems through Unikernelized Driver Domain and Virtual Machine Monitor Compartmentalization and Specialization
… infrastructures. Its core subsystems include hypervisors and virtual machine monitors (VMMs). They ensure the isolation and security of co-existent virtual machines (VMs) running on the same physical machine. Traditionally, driver domains -- isolated VMs in a hypervisor such as Xen that run …
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CheriOS: Designing an untrusted single-address-space capability operating system utilising capability hardware and a minimal hypervisor
This thesis presents the design, implementation, and evaluation of a novel capability operating system: CheriOS. The guiding motivation behind CheriOS is to provide strong security guarantees to programmers, even allowing them to continue to program in fast, but typically unsafe, languages such as …