東大電子情報工学科の田浦先生におよるオペーレーティングシステム授業で行なった「仮想マシンにおけるメモリ管理及びExtended Page Table」についての発表のスライドです。
発表で取り扱ったのはMerrifiel(2017)の"Performance Implications of Extended Page Tables on Virtualized x86 Processors"です。
This document discusses different methods for virtualizing I/O in virtual machines. It covers virtual I/O approaches like virtio, PCI passthrough, and SR-IOV. It also explains the role of the VMM/hypervisor in managing I/O between VMs and physical devices using techniques like VT-d, Open vSwitch, and single root I/O virtualization. Finally, it discusses emerging standards for virtual switching like virtual Ethernet bridging.
This document summarizes a talk on redesigning Xen's memory sharing (grant) mechanism. It proposes moving grant-related hypercalls to guest domains to allow unilateral revocation of grants by domains and enable better reuse of grants. An evaluation shows the redesigned mechanism with grant reuse reduces overhead and improves I/O performance compared to the traditional approach.
QEMU is a free and open-source hypervisor that performs hardware virtualization by emulating CPUs through dynamic binary translation and providing device models. This allows it to run unmodified guest operating systems. It can be used to create virtual machines similarly to VMWare, VirtualBox, KVM, and Xen. QEMU also supports emulating different CPU architectures and can save and restore the state of a virtual machine.
東大電子情報工学科の田浦先生におよるオペーレーティングシステム授業で行なった「仮想マシンにおけるメモリ管理及びExtended Page Table」についての発表のスライドです。
発表で取り扱ったのはMerrifiel(2017)の"Performance Implications of Extended Page Tables on Virtualized x86 Processors"です。
This document discusses different methods for virtualizing I/O in virtual machines. It covers virtual I/O approaches like virtio, PCI passthrough, and SR-IOV. It also explains the role of the VMM/hypervisor in managing I/O between VMs and physical devices using techniques like VT-d, Open vSwitch, and single root I/O virtualization. Finally, it discusses emerging standards for virtual switching like virtual Ethernet bridging.
This document summarizes a talk on redesigning Xen's memory sharing (grant) mechanism. It proposes moving grant-related hypercalls to guest domains to allow unilateral revocation of grants by domains and enable better reuse of grants. An evaluation shows the redesigned mechanism with grant reuse reduces overhead and improves I/O performance compared to the traditional approach.
QEMU is a free and open-source hypervisor that performs hardware virtualization by emulating CPUs through dynamic binary translation and providing device models. This allows it to run unmodified guest operating systems. It can be used to create virtual machines similarly to VMWare, VirtualBox, KVM, and Xen. QEMU also supports emulating different CPU architectures and can save and restore the state of a virtual machine.
This slide provides a basic understanding of hypervisor support in ARM v8 and above processors. And these slides (intent to) give some guidelines to automotive engineers to compare and choose right solution!
The document discusses building software for embedded systems across different architectures using QEMU. It describes native building versus cross building, and compares building directly on a system emulator versus Scratchbox. It proposes that a simpler approach is to use just the user mode of QEMU, along with chroot and binfmt_misc. An example is given of setting up a basic ARM chroot environment and building software faster using user mode QEMU instead of a full system emulator. Issues like mounting proc and networking are also addressed.
このスライドは前編です,後編はURLからどうぞ.
https://www.slideshare.net/fumi_maker/ss-236683765/fumi_maker/ss-236683765
電子工作を始めるために必要な基礎知識をまとめました。本書では、電気の基礎からアナログ回路、デジタル回路、マイコンの初歩までを網羅しています。初歩的なことしか書いていないので、教科書や書籍を参考にしながらじっくりと勉強してください。
This is a summary of the basic knowledge necessary to start electronic construction. This book covers the basics of electricity, analog circuits, digital circuits, and the rudiments of microcomputers. Since this book contains only elementary information, please study it in detail while referring to textbooks and books.
XPDDS19 Keynote: Xen Dom0-less - Stefano Stabellini, Principal Engineer, XilinxThe Linux Foundation
This talk will introduce Dom0-less: a new way of using Xen to build mixed-criticality solutions. Dom0-less is a Xen feature that adds a novel approach to static partitioning based on virtualization. It allows multiple domains to start at boot time directly from the Xen hypervisor, decreasing boot times dramatically. Xen userspace tools, such as xl and libvirt, become optional.
Dom0-less extends the existing device tree based Xen boot protocol to cover information required by additional domains. Binaries, such as kernels and ramdisks, are loaded by the bootloader (u-boot) and advertised to Xen via new device tree bindings.
The audience will learn how to use Dom0-less to partition the system. Uboot and device tree configuration details will be explained to enable the audience to get the most out of this feature. The talk will include a status update and details on future plans.
Xvisor is an open source lightweight hypervisor for ARM architectures. It uses a technique called cpatch to modify guest operating system binaries, replacing privileged instructions with hypercalls. This allows the guest OS to run without privileges in user mode under the hypervisor. Xvisor also implements virtual CPU and memory management to isolate guest instances and virtualize physical resources for multiple operating systems.
프로그래밍 언어의 F1머신 C++을 타고 Windows 10 UWP 앱 개발의 세계로~YEONG-CHEON YOU
Windows 10의 UWP 앱을 개발하면 모든 Windows 10 디바이스에서 앱을 작동할 수 있습니다.
이 UWP 앱을 C++로 개발할 수 있습니다. C++로 앱을 개발하면 크로스 플랫폼 지원의 유리함, 기존 코드의 재활용, 성능향상 등의 이점이 있습니다. 본 세션에서는 몇 가지 예를 들어 C++로 UWP 앱을 개발하는 방법을 소개하며 특히 win32와 C++을 사용하던 개발자가 쉽게 UWP 앱 개발에 적응할 수 있도록 돕습니다.
Hardware accelerated Virtualization in the ARM Cortex™ ProcessorsThe Linux Foundation
The document discusses hardware accelerated virtualization capabilities in ARM Cortex processors including the Cortex-A15. It describes new features like large physical addressing, virtualization extensions, and a virtual interrupt controller that allow multiple operating system instances and work environments to run simultaneously in isolation on ARM devices.
This slide provides a basic understanding of hypervisor support in ARM v8 and above processors. And these slides (intent to) give some guidelines to automotive engineers to compare and choose right solution!
The document discusses building software for embedded systems across different architectures using QEMU. It describes native building versus cross building, and compares building directly on a system emulator versus Scratchbox. It proposes that a simpler approach is to use just the user mode of QEMU, along with chroot and binfmt_misc. An example is given of setting up a basic ARM chroot environment and building software faster using user mode QEMU instead of a full system emulator. Issues like mounting proc and networking are also addressed.
このスライドは前編です,後編はURLからどうぞ.
https://www.slideshare.net/fumi_maker/ss-236683765/fumi_maker/ss-236683765
電子工作を始めるために必要な基礎知識をまとめました。本書では、電気の基礎からアナログ回路、デジタル回路、マイコンの初歩までを網羅しています。初歩的なことしか書いていないので、教科書や書籍を参考にしながらじっくりと勉強してください。
This is a summary of the basic knowledge necessary to start electronic construction. This book covers the basics of electricity, analog circuits, digital circuits, and the rudiments of microcomputers. Since this book contains only elementary information, please study it in detail while referring to textbooks and books.
XPDDS19 Keynote: Xen Dom0-less - Stefano Stabellini, Principal Engineer, XilinxThe Linux Foundation
This talk will introduce Dom0-less: a new way of using Xen to build mixed-criticality solutions. Dom0-less is a Xen feature that adds a novel approach to static partitioning based on virtualization. It allows multiple domains to start at boot time directly from the Xen hypervisor, decreasing boot times dramatically. Xen userspace tools, such as xl and libvirt, become optional.
Dom0-less extends the existing device tree based Xen boot protocol to cover information required by additional domains. Binaries, such as kernels and ramdisks, are loaded by the bootloader (u-boot) and advertised to Xen via new device tree bindings.
The audience will learn how to use Dom0-less to partition the system. Uboot and device tree configuration details will be explained to enable the audience to get the most out of this feature. The talk will include a status update and details on future plans.
Xvisor is an open source lightweight hypervisor for ARM architectures. It uses a technique called cpatch to modify guest operating system binaries, replacing privileged instructions with hypercalls. This allows the guest OS to run without privileges in user mode under the hypervisor. Xvisor also implements virtual CPU and memory management to isolate guest instances and virtualize physical resources for multiple operating systems.
프로그래밍 언어의 F1머신 C++을 타고 Windows 10 UWP 앱 개발의 세계로~YEONG-CHEON YOU
Windows 10의 UWP 앱을 개발하면 모든 Windows 10 디바이스에서 앱을 작동할 수 있습니다.
이 UWP 앱을 C++로 개발할 수 있습니다. C++로 앱을 개발하면 크로스 플랫폼 지원의 유리함, 기존 코드의 재활용, 성능향상 등의 이점이 있습니다. 본 세션에서는 몇 가지 예를 들어 C++로 UWP 앱을 개발하는 방법을 소개하며 특히 win32와 C++을 사용하던 개발자가 쉽게 UWP 앱 개발에 적응할 수 있도록 돕습니다.
Hardware accelerated Virtualization in the ARM Cortex™ ProcessorsThe Linux Foundation
The document discusses hardware accelerated virtualization capabilities in ARM Cortex processors including the Cortex-A15. It describes new features like large physical addressing, virtualization extensions, and a virtual interrupt controller that allow multiple operating system instances and work environments to run simultaneously in isolation on ARM devices.
Which Customers are You Building the Right Product For PCA9Paul Teich
This session is the opposite of Go-to-Market and Marketing Execution, which focus on "putting lipstick on the pig." We'll frame two ends of a product inception spectrum -- a) design a product that you'd want to buy and b) analyze a market to figure out what they're likely to buy -- and discuss the practical realities between the two.
A road map to 2020 - how can learning technologies support fast-changing busi...Brightwave Group
These slides were originally presented as part of the Brightwave keynote debate at Learning Technologies
Brightwave's Question Time-style debate called 'A road map to 2020: How can learning technologies support fast-changing business practice?' last week cast new light on the future of learning technologies.
7&7 - 7 Years and 7 Lessons from Design CommisisonDavid Conrad
This document outlines 7 lessons learned from co-owning a design business for 7 years. The lessons are: prioritize client services and products; trust your instincts on projects; manage finances carefully; use the appropriate tools for each job; develop talent within the company; find a business partner with complementary skills; and implement ideas to generate value rather than just conceiving them. The document is authored by the Studio Director of Design Commission and thanks an illustrator.
The February meeting of the North East Safety Health & Environmental Partnership (NESHEP) was held at Wilton International. The Chairman welcomed members of the Teesside Safety Group. Dr. Patrick Morton gave a presentation on asbestos regulations and surveyor competency. Dave Swalwell presented on the history of NESHEP and potential benefits of merging the two groups, such as larger attendance and more networking opportunities. Members provided positive feedback and discussed subscription levels.
The Hanse 342 sailboat has several features that make sailing easy for children and adults alike, including a self-tacking jib and maindrop system controlled from the cockpit. The boat's design emphasizes comfort and usability, with minimized features but luxurious furnishings below deck. Owners can customize aspects like cabin layouts, wood finishes, and cockpit configurations to suit their preferences. Performance is enhanced through details like a tapered masthead and optimized sail plans.
Kelly Ruggles is a financial advisor from Spokane, Washington who has over 20 years of experience providing retirement investment advice and financial planning services to seniors. He believes that educating seniors on investment options and strategies is key to financial security in retirement. Ruggles aims to simplify complex financial processes and has authored a book and articles on retirement planning topics.
Kelly C. Ruggles is a Spokane, Washington-based investment advisor and financial planner. With nearly two decades of experience working in the financial field, Kelly C. Ruggles has helped more than 1,000 retirees and preretirees with financial planning for their retirement years.
A 550-tonne truck-mounted crane overturned at the Port of Invergordon in Scotland on September 9, 2011. The crane was being relocated when its outriggers were pulled in to pass an obstruction but were not re-extended, causing the crane to lose stability. As the road camber changed, the crane tipped over. Thankfully no one was injured in the incident, though the boom came down on a nearby 100-tonne crane, damaging its cab.
This document advertises a Groundworkers Safety and Health Awareness Day event being held on May 11, 2011 at Marsden Quarry in Whitburn, Sunderland. The event aims to raise awareness of key health and safety issues in the construction industry and provide practical advice on avoiding risks. There will be presentations and demonstrations covering topics like quick hitches, unloading lorries, working with buried services, safe trench work, and treating groundworks as confined spaces. Attendees must bring appropriate personal protective equipment. Spots can be booked for the morning or afternoon session at a cost of £15 each.
Scarecrow Festival at Thackley Methodist Churchthackley
The document announces a Scarecrow Festival being held at the T Hackley Methodist Church. It will feature a performance by a group called The Glen Singers. The festival is a community event celebrating the fall season through scarecrows and live music.
You may have heard the news in the last two days about the Deepwater Horizon drilling rig which caught fire, burned for two days, then sank in 5,000 ft of water in the Gulf of Mexico. There are still 11 men missing, and they are not expected to be found...
This document outlines the process flow for receiving a packet on a network interface, passing it through various networking stacks in the kernel, and delivering it to a socket or application. Key steps include:
1) The packet is received by the network interface driver and passed to netif_receive_skb.
2) It then goes through processing such as checksum verification, filtering by iptables, and defragmentation if needed.
3) The packet is then routed and delivered to the appropriate socket using functions like ip_local_deliver.
4) Data from the packet is then placed into the receive queue for the socket's application to read.
Implements BIOS emulation support for BHyVe: A BSD HypervisorTakuya ASADA
The document discusses implementing BIOS emulation support for BHyVe, a BSD hypervisor. It describes how BIOS is handled on real hardware and Linux KVM. For BHyVe, it proposes using a pseudo BIOS that traps BIOS calls using the VMCALL instruction to cause a VM exit, where BHyVe can then emulate the BIOS call rather than using a real BIOS as KVM does. This avoids licensing issues while still providing BIOS support to enable more guest operating systems on BHyVe.