Operating systems
... 1.8 We have stressed the need for an operating system to make efficient use of the computing hardware. When is it appropriate for the operating system to forsake this principle and to “waste” resources? Why is such a system not really wasteful? Answer: Single-user systems should maximize use of the ...
... 1.8 We have stressed the need for an operating system to make efficient use of the computing hardware. When is it appropriate for the operating system to forsake this principle and to “waste” resources? Why is such a system not really wasteful? Answer: Single-user systems should maximize use of the ...
QUESTION BANK AOS
... 16. Discuss various desirable features of a good global scheduling algorithm. Discuss the issues in designing load balancing algorithms. 17. What are the steps involved in process migration? Discuss the desirable features of a good process migration mechanism. 18. Explain how a threads package can b ...
... 16. Discuss various desirable features of a good global scheduling algorithm. Discuss the issues in designing load balancing algorithms. 17. What are the steps involved in process migration? Discuss the desirable features of a good process migration mechanism. 18. Explain how a threads package can b ...
A Tool to Schedule Parallel Applications on Multiprocessors: the NANOS CPU Manager
... any moment and the number of processors currently allocated by the operating system to the application. From the number of requested processors, the operating system decides, in a first step, how many processors to allocate to each application. Processors are moved, in a second step, from one appli ...
... any moment and the number of processors currently allocated by the operating system to the application. From the number of requested processors, the operating system decides, in a first step, how many processors to allocate to each application. Processors are moved, in a second step, from one appli ...
ppt
... °OS convention to simplify software: • Process cannot be preempted by interrupt at same or lower "level" • Return to interrupted code as soon as no more interrupts at a higher level • When an interrupt is handled, take the highest priority interrupt on the queue - may be partially handled, may not, ...
... °OS convention to simplify software: • Process cannot be preempted by interrupt at same or lower "level" • Return to interrupted code as soon as no more interrupts at a higher level • When an interrupt is handled, take the highest priority interrupt on the queue - may be partially handled, may not, ...
Lecture notes 03
... How much should be in kernel ? Copyright © 2008 Pearson Education, Inc. Publishing as Pearson Addison-Wesley ...
... How much should be in kernel ? Copyright © 2008 Pearson Education, Inc. Publishing as Pearson Addison-Wesley ...
HPDC - Pitt Computer Science
... local workloads. This approach allows a user to dynamically compose independent enclaves from arbitrary sets of local hardware resources at runtime based on a coupled applications’ resource and isolation requirements. While others have explored the concept of lightweight cokernels coupled with Linux ...
... local workloads. This approach allows a user to dynamically compose independent enclaves from arbitrary sets of local hardware resources at runtime based on a coupled applications’ resource and isolation requirements. While others have explored the concept of lightweight cokernels coupled with Linux ...
comparison between smartphone operating systems
... Mobile phones Mobile phones are phones with call and SMS support, but without web browser, connectivity or software installation possibilities. One example of this category is the Nokia 1100. The problem with this type of very low-end mobile phones is that it is not possible for everyone to develop ...
... Mobile phones Mobile phones are phones with call and SMS support, but without web browser, connectivity or software installation possibilities. One example of this category is the Nokia 1100. The problem with this type of very low-end mobile phones is that it is not possible for everyone to develop ...
SafeDrive: Safe and Recoverable Extensions Using Language-Based Techniques
... programmers to easily express known relationships between variables and fields (e.g., “p points to an array of length n”). Second, the cost of annotating kernel headers is a one-time cost; once the headers are annotated, the marginal cost of annotating additional drivers is much smaller. Third, anno ...
... programmers to easily express known relationships between variables and fields (e.g., “p points to an array of length n”). Second, the cost of annotating kernel headers is a one-time cost; once the headers are annotated, the marginal cost of annotating additional drivers is much smaller. Third, anno ...
ch4
... Deliver the signal to every thread in the process Deliver the signal to certain threads in the process ...
... Deliver the signal to every thread in the process Deliver the signal to certain threads in the process ...
9 th Edition
... Deadlock – two or more processes are waiting indefinitely for an event that can be caused by only one of the waiting processes ...
... Deadlock – two or more processes are waiting indefinitely for an event that can be caused by only one of the waiting processes ...
Module 7: Process Synchronization
... Deadlock – two or more processes are waiting indefinitely for an event that can be caused by only one of the waiting processes ...
... Deadlock – two or more processes are waiting indefinitely for an event that can be caused by only one of the waiting processes ...
Virtualization in Software Engineering
... The container can restrict resources (processor usage, file systems, etc.) However, there is no isolation from the kernel If kernel has vulnerabilities, entire system can be affected ...
... The container can restrict resources (processor usage, file systems, etc.) However, there is no isolation from the kernel If kernel has vulnerabilities, entire system can be affected ...
Module 7: Process Synchronization
... Deadlock – two or more processes are waiting indefinitely for an event that can be caused by only one of the waiting processes ...
... Deadlock – two or more processes are waiting indefinitely for an event that can be caused by only one of the waiting processes ...
SecureSwitch: BIOS-Assisted Isolation and Switch between Trusted
... have to use multiple physically-isolated computers, merely switching controls and displays. Although attractive in terms of isolation, hardware increases the operational and maintenance cost because it requires more space, cooling, and energy. It is inflexible and cannot support the current need for ...
... have to use multiple physically-isolated computers, merely switching controls and displays. Although attractive in terms of isolation, hardware increases the operational and maintenance cost because it requires more space, cooling, and energy. It is inflexible and cannot support the current need for ...
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 ...
Experience Distributing Objects in an SMMP OS
... shared cache-line on a critical system code path can have a significant negative impact on performance and scalability. In this article, we describe a methodology and a framework for constructing system software that is structured for locality. We have applied the methodology in designing an SMMP op ...
... shared cache-line on a critical system code path can have a significant negative impact on performance and scalability. In this article, we describe a methodology and a framework for constructing system software that is structured for locality. We have applied the methodology in designing an SMMP op ...
Chapter 4: Threads
... The register set, stacks, and private storage area are known as the context of the threads! ...
... The register set, stacks, and private storage area are known as the context of the threads! ...
ppt
... Usually slightly faster to service a request with an existing thread than create a new thread ...
... Usually slightly faster to service a request with an existing thread than create a new thread ...
UNIX
... the boot loader begins execution. In the case of a hard drive, this first sector is referred to as the Master Boot Record (MBR). The MBR contains the partition table describing the partitions defined on the hard drive. It also contains a program, the boot loader, which will load the first sector of ...
... the boot loader begins execution. In the case of a hard drive, this first sector is referred to as the Master Boot Record (MBR). The MBR contains the partition table describing the partitions defined on the hard drive. It also contains a program, the boot loader, which will load the first sector of ...
COS 318: Operating Systems Mutex Implementation Prof. Margaret Martonosi Computer Science Department
... Conditions for a good Mutex solution: No two processes may be simultaneously inside their critical regions. No assumptions may be made about speeds or the number of CPUs. No process running outside its critical region may block other processes. No process should have to wait forever to ent ...
... Conditions for a good Mutex solution: No two processes may be simultaneously inside their critical regions. No assumptions may be made about speeds or the number of CPUs. No process running outside its critical region may block other processes. No process should have to wait forever to ent ...
Red Hat Enterprise Linux 4 Update 1 EAL4 High Level Design
... 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 Corporation in the Un ...
... 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 Corporation in the Un ...