A Survey on Virtualization Technologies
... it should be possible for the virtualization software to totally control what the user-space processes can do by managing this interface. Most applications use the APIs exported by user-level libraries rather than direct system calls for the implementation of their logic. Since most systems provide ...
... it should be possible for the virtualization software to totally control what the user-space processes can do by managing this interface. Most applications use the APIs exported by user-level libraries rather than direct system calls for the implementation of their logic. Since most systems provide ...
Proceedings of the Third Virtual Machine Research and Technology Symposium USENIX Association
... system algorithms, such as dynamic allocation of physical memory [25]. This paper presents solutions to two problems that arise with scheduling of virtual machines which provide a multi-processor environment for guest operating systems. Both problems limit scalability and performance. First, guest o ...
... system algorithms, such as dynamic allocation of physical memory [25]. This paper presents solutions to two problems that arise with scheduling of virtual machines which provide a multi-processor environment for guest operating systems. Both problems limit scalability and performance. First, guest o ...
SUSE Linux Enterprise Server 10 SP1 EAL4 High-Level Design Version 1.2.1
... This document is provided “AS IS” with no express or implied warranties. Use the information in this document at your own risk. This document may be reproduced or distributed in any form without prior permission provided the copyright notice is retained on all copies. Modified versions of this docum ...
... This document is provided “AS IS” with no express or implied warranties. Use the information in this document at your own risk. This document may be reproduced or distributed in any form without prior permission provided the copyright notice is retained on all copies. Modified versions of this docum ...
Omni-Kernel: An Operating System Architecture for Pervasive Monitoring and Scheduling
... called the OKRT. The runtime defines modular interfaces for resources and schedulers, and it provides means to compose them into a resource grid, along with supporting representation and aggregation of request messages, interscheduler communication, instrumentation of CPU and memory usage, managemen ...
... called the OKRT. The runtime defines modular interfaces for resources and schedulers, and it provides means to compose them into a resource grid, along with supporting representation and aggregation of request messages, interscheduler communication, instrumentation of CPU and memory usage, managemen ...
Synchronization Part-I - McMaster Computing and Software
... If multiple processes want to enter CS, only one of them gets to execute compare_and_swap() (also in finite time) A process executing in its remainder section does not get to block another process from entering the CS, since it ...
... If multiple processes want to enter CS, only one of them gets to execute compare_and_swap() (also in finite time) A process executing in its remainder section does not get to block another process from entering the CS, since it ...
Trusted Operating Systems
... • Formal description of the allowable paths of information flow in a secure system • Set of subjects and another set of objects • Each subject s has a fixed security clearance C(s) • Each object o has a fixed security class C(o) ...
... • Formal description of the allowable paths of information flow in a secure system • Set of subjects and another set of objects • Each subject s has a fixed security clearance C(s) • Each object o has a fixed security class C(o) ...
Ans What is operating system
... 3 System Call 4 None of the above Ans ) 2 29) In the running state 1 only the process which has control of the processor is found 2 all the processes waiting for I/O to be completed are found 3 all the processes waiting for the processor are found 4 none of the above Ans ) 1 30) Which of the followi ...
... 3 System Call 4 None of the above Ans ) 2 29) In the running state 1 only the process which has control of the processor is found 2 all the processes waiting for I/O to be completed are found 3 all the processes waiting for the processor are found 4 none of the above Ans ) 1 30) Which of the followi ...
Interprocess communication
... Also introduced in System V Release 3 Allows two or more processes to share some memory segments With some control over read/write permissions Often used to implement threads packages for UNIX ...
... Also introduced in System V Release 3 Allows two or more processes to share some memory segments With some control over read/write permissions Often used to implement threads packages for UNIX ...
Eliminating Receive Livelock in an Interrupt-Driven Kernel
... for handling certain other events, such as lower-priority device interrupts.) The queues between steps executed at dierent IPLs provide some insulation against packet losses due to transient overloads, but typically they have xed length limits. When a packet should be queued but the queue is full, ...
... for handling certain other events, such as lower-priority device interrupts.) The queues between steps executed at dierent IPLs provide some insulation against packet losses due to transient overloads, but typically they have xed length limits. When a packet should be queued but the queue is full, ...
Principles of Operating Systems
... 9 it takes less time to create a new thread than a new process 9 it takes less time to terminate a thread than a process 9 it takes less time to switch between two threads within the same process than between two processes 9 threads within the same process share memory and files, therefore they can ...
... 9 it takes less time to create a new thread than a new process 9 it takes less time to terminate a thread than a process 9 it takes less time to switch between two threads within the same process than between two processes 9 threads within the same process share memory and files, therefore they can ...
SLES High Level Design Version 3.16 1
... registered trademarks of International Business Machines Corporation in the United States, other countries, or both. Linux is a registered trademark of Linus Torvalds. UNIX is a registered trademark of The Open Group in the United States and other countries. Intel and Pentium are trademarks of Intel ...
... registered trademarks of International Business Machines Corporation in the United States, other countries, or both. Linux is a registered trademark of Linus Torvalds. UNIX is a registered trademark of The Open Group in the United States and other countries. Intel and Pentium are trademarks of Intel ...
This chapter covers the following key topics: • Operating Systems
... programmer doesn’t need to deal with the hardware’s intricacies. Instead, the hardwarespecific programming is developed once, in the operating system, and everyone shares. The second function that operating systems provide is managing the computer’s resources (CPU cycles, memory, and disk drive spac ...
... programmer doesn’t need to deal with the hardware’s intricacies. Instead, the hardwarespecific programming is developed once, in the operating system, and everyone shares. The second function that operating systems provide is managing the computer’s resources (CPU cycles, memory, and disk drive spac ...
STUDY GUIDE FOR THE MIDTERM EXAM of Tuesday November 3
... some processes that wish to enter their critical section, then the selection of the processes that will enter the critical section next cannot be ...
... some processes that wish to enter their critical section, then the selection of the processes that will enter the critical section next cannot be ...
SLES High Level Design Version 2.25 1
... Intel and Pentium are trademarks of Intel Corporation in the United States, other countries, or both. Other company, product, and service names may be trademarks or service marks of others. This document is provided “AS IS” with no express or implied warranties. Use the information in this document ...
... Intel and Pentium are trademarks of Intel Corporation in the United States, other countries, or both. Other company, product, and service names may be trademarks or service marks of others. This document is provided “AS IS” with no express or implied warranties. Use the information in this document ...
Structure of Operating Systems
... • A Virtual Machine (VM) takes the layered and microkernel approach to its logical conclusion. • It treats hardware and the operating system kernel as though they were all hardware. • A virtual machine provides an interface identical to the underlying bare hardware. • The operating system host creat ...
... • A Virtual Machine (VM) takes the layered and microkernel approach to its logical conclusion. • It treats hardware and the operating system kernel as though they were all hardware. • A virtual machine provides an interface identical to the underlying bare hardware. • The operating system host creat ...
Virtual Ghost: Protecting Applications from Hostile Operating Systems
... the first to enforce application security from a hostile OS using compiler instrumentation of operating system code; this is used to create secure memory called ghost memory, which cannot be read or modified at all by the operating system (in contrast, previous systems like Overshadow [11] and InkTa ...
... the first to enforce application security from a hostile OS using compiler instrumentation of operating system code; this is used to create secure memory called ghost memory, which cannot be read or modified at all by the operating system (in contrast, previous systems like Overshadow [11] and InkTa ...
Protection of user process data in a secure platform architecture
... on top of the operating system image. The secure platform is con?gured to provide a secure partition Within the memory for storing secret data associated With and acces sible by the end user application. The secure partition is inaccessible to the operating system and other tasks oper ating on top o ...
... on top of the operating system image. The secure platform is con?gured to provide a secure partition Within the memory for storing secret data associated With and acces sible by the end user application. The secure partition is inaccessible to the operating system and other tasks oper ating on top o ...
CS-703 Advance Operating Systems
... • C/C++ programming. This is an essential pre-requisite since without this; you won‘t be able to do the assignments. • An undergraduate first course on data structures. This should include implementation of elementary data structures e.g. lists, stack, queues, trees etc. in a high level language lik ...
... • C/C++ programming. This is an essential pre-requisite since without this; you won‘t be able to do the assignments. • An undergraduate first course on data structures. This should include implementation of elementary data structures e.g. lists, stack, queues, trees etc. in a high level language lik ...
Experience Distributing Objects in an SMMP OS
... encapsulates the data needed to manage the resource instance as well as the locks required to protect the data. Thus, K42 is designed to avoid global locks or global data structures, such as the process table, the file table, the global page cache, the call-switch table, or the device-switch table u ...
... encapsulates the data needed to manage the resource instance as well as the locks required to protect the data. Thus, K42 is designed to avoid global locks or global data structures, such as the process table, the file table, the global page cache, the call-switch table, or the device-switch table u ...
Process and Thread Scheduling - UC Davis
... Scheduling Criteria • CPU utilization – keep the CPU as busy as possible • Throughput – # of processes that complete their execution per time unit • Turnaround time – amount of time to execute a particular process • Waiting time – amount of time a process has been waiting in the ready queue • Respo ...
... Scheduling Criteria • CPU utilization – keep the CPU as busy as possible • Throughput – # of processes that complete their execution per time unit • Turnaround time – amount of time to execute a particular process • Waiting time – amount of time a process has been waiting in the ready queue • Respo ...
Denali: Lightweight Virtual Machines
... In this paper, we present the design, implementation, and evaluation of the Denali isolation kernel, an x86-based operating system that isolates untrusted software services in separate protection domains. The architecture of Denali is similar to that of virtual machine monitors such as Disco [6], VM ...
... In this paper, we present the design, implementation, and evaluation of the Denali isolation kernel, an x86-based operating system that isolates untrusted software services in separate protection domains. The architecture of Denali is similar to that of virtual machine monitors such as Disco [6], VM ...
Proceedings of the 5th Symposium on Operating Systems Design and Implementation USENIX Association
... In this paper, we present the design, implementation, and evaluation of the Denali isolation kernel, an x86-based operating system that isolates untrusted software services in separate protection domains. The architecture of Denali is similar to that of virtual machine monitors such as Disco [6], VM ...
... In this paper, we present the design, implementation, and evaluation of the Denali isolation kernel, an x86-based operating system that isolates untrusted software services in separate protection domains. The architecture of Denali is similar to that of virtual machine monitors such as Disco [6], VM ...