The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Network Function Virtualization (NFV) brings agility and flexibility delivering network services with cost efficiency to network operators. As an emerging technology, it also presents several challenges, among them, ensuring high performance for virtualized network functions, based on software implementation and running on standard IT servers, instead of custom hardware appliances. In this article,...
Cloud computing has become pervasive nowadays. Additionally, cloud computing customers increasingly demand the use of accelerators such as CUDA GPUs. This has motivated that Amazon, for example, provides virtual machine instances comprising up to 16 NVIDIA GPUs. However, the use of GPUs in cloud computing deployments is not exempt from important concerns. In order to overcome many of these concerns,...
The desktop virtualization environment could propose a solution for the high-definition video processing, which used multi-GPU collaboration and parallel computing. The multi-GPU parallel encoding computing is often implemented by multi-threads mode. Based on the analysis of the GPU multi-level storage structure, and data transmission between CPU and GPU, pinned memory (zero-copy memory) and shared...
Computing performance and scalability are essential ingredients in modern data centres offering cloud services. Field Programmable Gate Arrays (FPGAs) provide a promising opportunity to improve performance, security and energy efficiency because their hardware architecture can be adapted directly to the application. In this paper we present the development of our FPGA cloud architecture, beginning...
We study using multiple GPU devices to accelerate processing of streaming data. The amount of traffic on the Internet is rapidly rising. Much of this rise is due to media streams that need to be processed. However, the global growth rate of processing capacity is lagging behind. We see Fog computing, i.e., processing capacity attached directly to the nodes of the network, as one possibility to address...
Virtual platforms provide benefits to developers in terms of a more rapid development cycle since development may begin before next-generation hardware is available. However, there is a distinct lack of graphics virtualization in industry-grade virtual platforms, leading to performance issues that may reduce the benefits virtual platforms otherwise have over execution on actual hardware. This paper...
Today virtualization technology is the focus of many new potential threats and introduces new security challenges that we must meet. The key problem is that malware can utilize the virtualization techniques of modern CPUs for “hidden virtualization” (invisible for user): to execute as a hypervisor and transform the working operation system (OS) into a “guest” state. In this work we analyzed and compared...
The combination of emerging concepts, such as Fog Computing, Software Defined Networking and Network Function Virtualization will contribute to transform the network into a flexible and dynamical continuum of resources, on which services can be easily deployed and managed (network programmability). In this scenario, a major topic is the use of ad hoc h/w accelerators, in particular to provide the...
With the emerging trend of server virtualization, a new network access layer has emerged that is composed of the virtual switches running on the server platform, providing connectivity among the virtual machines (VMs) that live on the same physical server. This layer is generally implemented using the Open vSwitch (OVS) or an equivalent proprietary virtual switch. In networking for virtualization,...
Virtualization is a building block technology of cloud computing. Software virtualization solutions, such as paravirtualized Memory Management Unit and paravirtualized I/O, provide flexible manageability, such as virtual machine migration and IP-based network packet filtering. However, it suffers from performance and scalability issues. Hardware virtualization and its advanced accelerations, such...
Embedded systems are increasingly complex and heterogeneous to deal with increasing performance requirements along with wider ranges of application domains. The architecture of such systems often includes different kinds of computing resources and accelerators (DSPs, GPUs, etc.). Thus, application developers are facing important portability issues to adapt their software code to take maximum advantage...
Many advanced hardware accelerations for virtualization, such as Pause Loop Exit (PLE), Extended Page Table (EPT), and Single Root I/O Virtualization (SR-IOV), have been introduced recently to improve the virtualization performance and scalability. In this paper, we share our experience with the performance and scalability issues of virtualization, especially those brought by the modern, multi-core...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.