Are Virtual Machine Monitors Microkernels Done Right? Evangelos Kotsovinos, Dan Magenheimer
... a critical design concern in the construction of highperformance VMMs. There are a number of reasons why we can avoid relying on fast, typically synchronous, IPC mechanisms. First, since VMMs hold isolation to be a key goal, IPC between virtual machines is considerably less common in general. This i ...
... a critical design concern in the construction of highperformance VMMs. There are a number of reasons why we can avoid relying on fast, typically synchronous, IPC mechanisms. First, since VMMs hold isolation to be a key goal, IPC between virtual machines is considerably less common in general. This i ...
ch2-OS-Structure
... layers. The bottom layer (layer 0), is the hardware; the highest (layer N) is the user interface. With modularity, layers are ...
... layers. The bottom layer (layer 0), is the hardware; the highest (layer N) is the user interface. With modularity, layers are ...
Evolution of the Windows Kernel Architecture
... Kernel Architect at Microsoft for over 13 years Managed platform-independent kernel development in Win2K/XP Working on multi-core & heterogeneous parallel computing support Architect for UMS in Windows 7 / Windows Server 2008 R2 ...
... Kernel Architect at Microsoft for over 13 years Managed platform-independent kernel development in Win2K/XP Working on multi-core & heterogeneous parallel computing support Architect for UMS in Windows 7 / Windows Server 2008 R2 ...
7.3. Computer System Structures
... mobile phones, and digital cameras. The firmware contained in these devices provides the control program for the device. Firmware is held in non-volatile memory devices such as ROM, EPROM, or flash memory. Changing the firmware of a device may rarely or never be done during its economic lifetime; so ...
... mobile phones, and digital cameras. The firmware contained in these devices provides the control program for the device. Firmware is held in non-volatile memory devices such as ROM, EPROM, or flash memory. Changing the firmware of a device may rarely or never be done during its economic lifetime; so ...
What is a Process? Answer 1: a process is an abstraction of a
... • multiprogramming means having multiple processes existing at the same time • most modern, general purpose operating systems support multiprogramming • all processes share the available hardware resources, with the sharing coordinated by the operating system: – Each process uses some of the availab ...
... • multiprogramming means having multiple processes existing at the same time • most modern, general purpose operating systems support multiprogramming • all processes share the available hardware resources, with the sharing coordinated by the operating system: – Each process uses some of the availab ...
hw1_wet
... In this exercise you need to implement code wrappers and the corresponding system calls. For example: msgame_init is a code wrapper and sys_msgame_init is a system call (see the slides for tutorial 2). Also, you will need to change some other functions in the kernel accordingly. Code wrappers: The f ...
... In this exercise you need to implement code wrappers and the corresponding system calls. For example: msgame_init is a code wrapper and sys_msgame_init is a system call (see the slides for tutorial 2). Also, you will need to change some other functions in the kernel accordingly. Code wrappers: The f ...
Steps of porting (cont
... Here talks only ‘kernel’, the deepest of an operating system A kernel needs to provide root services for other parts in system Kernel also have to manage hardware and allocate system resources Sometimes a kernel can be explained as ‘supervisor of OS’ or ‘core’ ...
... Here talks only ‘kernel’, the deepest of an operating system A kernel needs to provide root services for other parts in system Kernel also have to manage hardware and allocate system resources Sometimes a kernel can be explained as ‘supervisor of OS’ or ‘core’ ...
Are Virtual-Machine Monitors Microkernels Done Right?
... the guest VM and Dom0 . The authors call this Under this heading, Hand et al. argue that a benefit a “simple asynchronous unidirectional event of VMMs is that they are designed to run complete mechanism” — it is nothing else than a form legacy systems, with familiar programming and development envir ...
... the guest VM and Dom0 . The authors call this Under this heading, Hand et al. argue that a benefit a “simple asynchronous unidirectional event of VMMs is that they are designed to run complete mechanism” — it is nothing else than a form legacy systems, with familiar programming and development envir ...
I/O Systems 2.
... If device can serve only one request at a time i.e., Printing Device reservation - provides exclusive access to a ...
... If device can serve only one request at a time i.e., Printing Device reservation - provides exclusive access to a ...
lecture2
... the security mechanisms and policies should be implemented. Kernel security mechanisms play a critical role in supporting security at higher levels. One approach is to use firmware and kernel support for fault tolerance (see above), and build the security policy for malicious behavior on top of that ...
... the security mechanisms and policies should be implemented. Kernel security mechanisms play a critical role in supporting security at higher levels. One approach is to use firmware and kernel support for fault tolerance (see above), and build the security policy for malicious behavior on top of that ...
Are Virtual Machine Monitors Microkernels Done Right? Evangelos Kotsovinos, Dan Magenheimer
... Despite having dissimilar motivations and origins, microkernels and VMMs share many architectural commonalities. In this paper we have attempted to illustrate some of the technical separations between the two classes of system that, in our opinion, have favoured the success of VMMs in recent years. ...
... Despite having dissimilar motivations and origins, microkernels and VMMs share many architectural commonalities. In this paper we have attempted to illustrate some of the technical separations between the two classes of system that, in our opinion, have favoured the success of VMMs in recent years. ...
Mach: A System Software Kernel Abstract
... • binary compatibility with non-Mach OS environments, ...
... • binary compatibility with non-Mach OS environments, ...
ch02services
... Make the kernel as small as possible Moves as much from the kernel into “user” space Communication takes place between user modules using message ...
... Make the kernel as small as possible Moves as much from the kernel into “user” space Communication takes place between user modules using message ...
Real-Time Operating Systems Lecture for the Embedded Systems
... Microkernel Monolithic Kernel (CoreOS + Wind microkernel) Provides interfaces specified by RT-POSIX standards in addition to its own APIs Shared-memory objects: shared binary and counting semaphores Standard MMU (as in modern OS) ...
... Microkernel Monolithic Kernel (CoreOS + Wind microkernel) Provides interfaces specified by RT-POSIX standards in addition to its own APIs Shared-memory objects: shared binary and counting semaphores Standard MMU (as in modern OS) ...
Operating system structures
... Mode bit provided by hardware Provides ability to distinguish when system is running user code or kernel code Some instructions designated as privileged, only executable in kernel mode ...
... Mode bit provided by hardware Provides ability to distinguish when system is running user code or kernel code Some instructions designated as privileged, only executable in kernel mode ...
kernel-intro
... • Starts at the end of the inode list • Contains disk files • An allocated data block can belong to one and only one file in the file system ...
... • Starts at the end of the inode list • Contains disk files • An allocated data block can belong to one and only one file in the file system ...
Slide 1
... • Starts at the end of the inode list • Contains disk files • An allocated data block can belong to one and only one file in the file system ...
... • Starts at the end of the inode list • Contains disk files • An allocated data block can belong to one and only one file in the file system ...
Chapter 2: Introduction to the Kernel
... • Starts at the end of the inode list • Contains disk files • An allocated data block can belong to one and only one file in the file system ...
... • Starts at the end of the inode list • Contains disk files • An allocated data block can belong to one and only one file in the file system ...
Operating system structures
... Parameters placed, or pushed, onto the stack by the program and popped off the stack by the operating system Block and stack methods do not limit the number or length of ...
... Parameters placed, or pushed, onto the stack by the program and popped off the stack by the operating system Block and stack methods do not limit the number or length of ...
Assignment0: Linux Basics and /proc
... The Linux kernel is a collection of data structure instances (kernel variables) and functions. The collective kernel variables define the kernel's perspective of the state of the entire computer system. Each externally invoked function-a system call or an IRQ-provides a prescribed service and causes ...
... The Linux kernel is a collection of data structure instances (kernel variables) and functions. The collective kernel variables define the kernel's perspective of the state of the entire computer system. Each externally invoked function-a system call or an IRQ-provides a prescribed service and causes ...
ngOS01 OS Architecture
... • Microkernel to cope with the ever increasing complexity of the UNIX operating system – Reduce the number of features in the kernel to make it less complex ...
... • Microkernel to cope with the ever increasing complexity of the UNIX operating system – Reduce the number of features in the kernel to make it less complex ...
hw1_wet
... below. You should use VMware to simulate a virtual machine on which you compile and run your "modified" Linux. ...
... below. You should use VMware to simulate a virtual machine on which you compile and run your "modified" Linux. ...
Kernel (operating system)
In computing, the kernel is a computer program that manages I/O requests from software, and translates them into data processing instructions for the central processing unit and other electronic components of a computer. The kernel is a fundamental part of a modern computer's operating system.The critical code of the kernel is usually loaded into a protected area of memory, which prevents it from being overwritten by other, less frequently used parts of the operating system or by applications. The kernel performs its tasks, such as executing processes and handling interrupts, in kernel space, whereas everything a user normally does, such as writing text in a text editor or running programs in a GUI (graphical user interface), is done in user space. This separation prevents user data and kernel data from interfering with each other and thereby diminishing performance or causing the system to become unstable (and possibly crashing). When a process makes requests of the kernel, the request is called a system call. Various kernel designs differ in how they manage system calls and resources. For example, a monolithic kernel executes all the operating system instructions in the same address space in order to improve the performance of the system. A microkernel runs most of the operating system's background processes in user space, to make the operating system more modular and, therefore, easier to maintain.The kernel's interface is a low-level abstraction layer.