Razya Ladelsky

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The most popular I/O virtualization method today is paravirtual I/O. Its popularity stems from its reasonable performance levels while allowing the host to interpose, i.e., inspect or control, the guest's I/O activity. We show that paravirtual I/O performance still significantly lags behind that of state-of-the-art non-interposing I/O virtualization, SRIOV.(More)
1 2 Harm Munk et al. Streaming applications are built of data-driven, computational components, consuming and producing unbounded data streams. Streaming oriented systems have become dominant in a wide range of domains, including embedded applications and DSPs. However, programming efficiently for streaming architectures is a challenging task, having to(More)
Helping programmers write parallel software is an urgent problem given the popularity of multi-core architectures. Engineering compilers which automatically parallelize and vectorize code has turned out to be very challenging. Compilers are not powerful enough to exploit all opportunities for optimization in a code fragment – rather, they are selective with(More)
Hypervisors implement useful features such as live migration and software-defined networking by interpos-ing on their guest virtual machines' I/O activity. Unfortunately , this interposition significantly reduces performance and scalability due to competition for resources between multiple guests and costly host/guest context switches. We present an(More)
The traditional "trap and emulate" I/O paravirtualization model conveniently allows for I/O interposition, yet it inherently incurs costly guest-host context switches. The newer "sidecore" model eliminates this overhead by dedicating host (side)cores to poll the relevant guest memory regions and react accordingly without context switching. But the(More)
Para-virtualization is the leading approach in IO device virtualization. It allows the hypervisor to interpose on and inspect a virtual machine's I/O traffic at run-time. Examples of such interfaces are KVM's virtio [6] and VMWare's VMXNET [7]. Current implementations of virtual I/O in the hypervisor have been shown to have performance and scalability(More)
Acknowledgements First and foremost, I would like to thank my research supervisor Prof. Dan Tsafrir for all of his great help and support. Without his assistance and dedicated involvement in every step throughout the process, both from the personal and professional sides, this thesis would have never been accomplished. My sincere thanks also go to Abel(More)
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