The California Institute for Telecommunications and
... OptIPuter is Exploring Quanta as a High Performance Middleware • Quanta is a high performance networking toolkit / API. • Reliable Blast UDP: – Assumes you are running over an over-provisioned or dedicated network. – Excellent for photonic networks, don’t try this on commodity Internet. – It is FAS ...
... OptIPuter is Exploring Quanta as a High Performance Middleware • Quanta is a high performance networking toolkit / API. • Reliable Blast UDP: – Assumes you are running over an over-provisioned or dedicated network. – Excellent for photonic networks, don’t try this on commodity Internet. – It is FAS ...
The NSF Future Internet Architecture (FIA) Program
... Allow host attachment and operation with a NVENT/NDP is as easy to automate and use low level of effort as DHCP/IP. Support secure communication (authentication, authorization, integrity, confidentiality) among trusted nodes. ...
... Allow host attachment and operation with a NVENT/NDP is as easy to automate and use low level of effort as DHCP/IP. Support secure communication (authentication, authorization, integrity, confidentiality) among trusted nodes. ...
slides_ppt
... – Separate operating system – By emulating underlying hardware – Each OS has own network stack ...
... – Separate operating system – By emulating underlying hardware – Each OS has own network stack ...
AppGuard - UTSA CS
... of Computer Science, Virginia Commonwealth University Email: {zhaz, lim4, wzang, myu}@vcu.edu † Department of Computer Science, George Mason University Email: [email protected] ...
... of Computer Science, Virginia Commonwealth University Email: {zhaz, lim4, wzang, myu}@vcu.edu † Department of Computer Science, George Mason University Email: [email protected] ...
What is an Operating System?
... in the same task can run. Cooperation of multiple threads in the same job confers higher throughput and improved performance. Applications that require sharing a common buffer (i.e. producer-consumer) benefit from thread utilization. ...
... in the same task can run. Cooperation of multiple threads in the same job confers higher throughput and improved performance. Applications that require sharing a common buffer (i.e. producer-consumer) benefit from thread utilization. ...
Operating systems - burgate-ict
... Windows 95 and 98 to upgrade their operating systems to include: – Revert back to backup – users could automatically restore an old backup if files became corrupted or were deleted – Protect system files –important system files were protected from being modified by other ...
... Windows 95 and 98 to upgrade their operating systems to include: – Revert back to backup – users could automatically restore an old backup if files became corrupted or were deleted – Protect system files –important system files were protected from being modified by other ...
Network operating system comparison
... of additional services, such as database or electronic messaging 2.As an additional service layered upon a general-purpose operating system, such as Unix or OpenVMS ...
... of additional services, such as database or electronic messaging 2.As an additional service layered upon a general-purpose operating system, such as Unix or OpenVMS ...
High Performance Application-Oriented Operating Systems
... The combination of scenario-independent system abstractions and scenario adapters reduces the number of components in the system abstraction repository, yields applicationready abstractions and enables the automatic generation of new abstractions. However, this is not enough to bring the process of ...
... The combination of scenario-independent system abstractions and scenario adapters reduces the number of components in the system abstraction repository, yields applicationready abstractions and enables the automatic generation of new abstractions. However, this is not enough to bring the process of ...
Chapter 13
... Least privilege like “low watermark” Simplicity Open design (Kerchoffs Principle) Complete mediation White listing (preferable to black listing) Separation Ease of use But commercial OSs emphasize features – Results in complexity and poor security ...
... Least privilege like “low watermark” Simplicity Open design (Kerchoffs Principle) Complete mediation White listing (preferable to black listing) Separation Ease of use But commercial OSs emphasize features – Results in complexity and poor security ...
16. Distributed System Structures
... message indicating that they are up and running If site A does not receive a message within the fixed interval, it assumes either The other site is not up or the message was lost Site A can now send an Are-you-up? message to site B If site A does not receive a reply, it can repeat the mess ...
... message indicating that they are up and running If site A does not receive a message within the fixed interval, it assumes either The other site is not up or the message was lost Site A can now send an Are-you-up? message to site B If site A does not receive a reply, it can repeat the mess ...
A Survey of Embedded Operating System
... QNX message passing primitives support multipart messaging, such that a message delivered from one process to another need not occupy a single, contiguous area in the memory. QNX uses an MX table to indicate where the sending and receiving message fragments reside in memory. This allows messages tha ...
... QNX message passing primitives support multipart messaging, such that a message delivered from one process to another need not occupy a single, contiguous area in the memory. QNX uses an MX table to indicate where the sending and receiving message fragments reside in memory. This allows messages tha ...
Operating Systems
... Identifier – unique tag (number) identifies file within file system Type – needed for systems that support different types Location – pointer to file location on device ...
... Identifier – unique tag (number) identifies file within file system Type – needed for systems that support different types Location – pointer to file location on device ...
Benu: Operating System Increments for Embedded
... functionalities. Topics covered by Nachos include thread and process management, paging, file systems and network subsystems. Because solutions from previous assignments are used in the next ones, students are highly motivated to do their best in every assignment. Nachos comes with a MIPS processor ...
... functionalities. Topics covered by Nachos include thread and process management, paging, file systems and network subsystems. Because solutions from previous assignments are used in the next ones, students are highly motivated to do their best in every assignment. Nachos comes with a MIPS processor ...
Sort-first
... Assume a dataset containing nr raw primitives with average size ar . We will call primitives that result from tessellation display primitives. If T is the tessellation ratio, there are nd = Tnr of these, with average size ad = ar /T. If there is no tessellation, T = 1, nd = nr , and ad = ar . Assume ...
... Assume a dataset containing nr raw primitives with average size ar . We will call primitives that result from tessellation display primitives. If T is the tessellation ratio, there are nd = Tnr of these, with average size ad = ar /T. If there is no tessellation, T = 1, nd = nr , and ad = ar . Assume ...
an evolutionary approach to improve the life time of the wireless
... energy gets depleted faster than other nodes, so LEACH provided a CH rotation mechanism in which in each round of data collection a new CH is elected to distribute the energy dissipation in the network. Though LEACH can be made application specific random selection of CH is a major drawback. PEGASIS ...
... energy gets depleted faster than other nodes, so LEACH provided a CH rotation mechanism in which in each round of data collection a new CH is elected to distribute the energy dissipation in the network. Though LEACH can be made application specific random selection of CH is a major drawback. PEGASIS ...
A Pattern Language for Secure Operating System Architectures
... – List all units in the system and define their dependencies. – Assign units to levels such that units in higher levels depend only on units of lower levels. – Once the modules in a given level are assigned, define a language for this level. This language includes the operations that we want to make ...
... – List all units in the system and define their dependencies. – Assign units to levels such that units in higher levels depend only on units of lower levels. – Once the modules in a given level are assigned, define a language for this level. This language includes the operations that we want to make ...
Blackfin操作系统及应用
... Extensive set of multi-function instructions – do more work in a single clock cycle ...
... Extensive set of multi-function instructions – do more work in a single clock cycle ...
Chap3
... Memory is a large array of words or bytes, each with its own address. It is a repository of quickly accessible data shared by the CPU and I/O devices. Main memory is a volatile storage device. It loses its contents in the case of system failure. The operating system is responsible for the following ...
... Memory is a large array of words or bytes, each with its own address. It is a repository of quickly accessible data shared by the CPU and I/O devices. Main memory is a volatile storage device. It loses its contents in the case of system failure. The operating system is responsible for the following ...
Review
... {P1, P2,…, Pn}, such that for each Pi, the resources that Pi can still request can be satisfied by the currently available resources plus the resources held ...
... {P1, P2,…, Pn}, such that for each Pi, the resources that Pi can still request can be satisfied by the currently available resources plus the resources held ...
Process
... Resource ownership - process includes a virtual address space to hold the process image Scheduling/execution- follows an execution path that may be interleaved with other processes These two characteristics are treated independently by the operating system ...
... Resource ownership - process includes a virtual address space to hold the process image Scheduling/execution- follows an execution path that may be interleaved with other processes These two characteristics are treated independently by the operating system ...
Last Class: Processes Example Unix Program: Fork
... Ideally, choose a CPU scheduler that optimizes all criteria simultaneously (utilization, throughput,..), but this is not generally possible Instead, choose a scheduling algorithm based on its ability to satisfy a policy • Minimize average response time - provide output to the user as quickly as pos ...
... Ideally, choose a CPU scheduler that optimizes all criteria simultaneously (utilization, throughput,..), but this is not generally possible Instead, choose a scheduling algorithm based on its ability to satisfy a policy • Minimize average response time - provide output to the user as quickly as pos ...
Distributed operating system
A distributed operating system is a software over a collection of independent, networked, communicating, and physically separate computational nodes. Each individual node holds a specific software subset of the global aggregate operating system. Each subset is a composite of two distinct service provisioners. The first is a ubiquitous minimal kernel, or microkernel, that directly controls that node’s hardware. Second is a higher-level collection of system management components that coordinate the node's individual and collaborative activities. These components abstract microkernel functions and support user applications.The microkernel and the management components collection work together. They support the system’s goal of integrating multiple resources and processing functionality into an efficient and stable system. This seamless integration of individual nodes into a global system is referred to as transparency, or single system image; describing the illusion provided to users of the global system’s appearance as a single computational entity.