Subject : OPS - 12178 Chapter 4 Process Scheduling Scheduling
... be in a common ready queue, or each processor may have its own private queue of ready processes. Regardless, scheduling proceeds by having the scheduler for each processor examine the ready queue and select a process to execute. If we have multiple processors trying to access and update a common dat ...
... be in a common ready queue, or each processor may have its own private queue of ready processes. Regardless, scheduling proceeds by having the scheduler for each processor examine the ready queue and select a process to execute. If we have multiple processors trying to access and update a common dat ...
Omni-Kernel: An Operating System Architecture for Pervasive Monitoring and Scheduling
... This paper presents the omni-kernel architecture, which offers visibility and opportunity for control over resource allocation in a computing system. All system devices (e.g., processors, memory, or I/O controllers) and higher-level resources (e.g., files and TCP) can have their usage monitored and ...
... This paper presents the omni-kernel architecture, which offers visibility and opportunity for control over resource allocation in a computing system. All system devices (e.g., processors, memory, or I/O controllers) and higher-level resources (e.g., files and TCP) can have their usage monitored and ...
Living in Two Worlds: Supporting SAS on CMS and MVS
... Files in a format readable on both CMS and MVS (as well as VSE) without the necessity of creating an intermediate Transport Data Set. This is accomplished through the use of the SAS TAPE Library Engine. The use of this mechanism for writing the SAS File is specifIed on the LIBNAME statement using th ...
... Files in a format readable on both CMS and MVS (as well as VSE) without the necessity of creating an intermediate Transport Data Set. This is accomplished through the use of the SAS TAPE Library Engine. The use of this mechanism for writing the SAS File is specifIed on the LIBNAME statement using th ...
Structuring of the Windows Operating System
... ! Scheduling algorithms take this into account ! Tries to schedule threads on processors within the same node ! Tries to allocate memory from local memory for processes with threads on the node ...
... ! Scheduling algorithms take this into account ! Tries to schedule threads on processors within the same node ! Tries to allocate memory from local memory for processes with threads on the node ...
Processes - Computer and Information Science
... state of the old process and load the saved state for the new process Context-switch time is overhead; the system does no useful work ...
... state of the old process and load the saved state for the new process Context-switch time is overhead; the system does no useful work ...
Document
... Issues raised by multi-user OSs. System manages multiple requests to same resource concurrently. Should avoid deadlocks. Serial equipment (printers) hooked up to the multi-user OS should be queued. The OS simulates real time performance by task switching. Short Course 2003 ...
... Issues raised by multi-user OSs. System manages multiple requests to same resource concurrently. Should avoid deadlocks. Serial equipment (printers) hooked up to the multi-user OS should be queued. The OS simulates real time performance by task switching. Short Course 2003 ...
Implementing hard drive.
... change its size or type other than by erasing it. Third-party tools can non-destructively resize partitions (without losing the data) Windows 2000 and XP can non-destructively resize a partition to be larger but not smaller. Vista can non-destructively resize partitions any ...
... change its size or type other than by erasing it. Third-party tools can non-destructively resize partitions (without losing the data) Windows 2000 and XP can non-destructively resize a partition to be larger but not smaller. Vista can non-destructively resize partitions any ...
PPT
... cause each to map to the same address space (because they’re part of the same computation) give each its starting address and initial parameters the OS will then schedule these processes, in parallel, on the various processors ...
... cause each to map to the same address space (because they’re part of the same computation) give each its starting address and initial parameters the OS will then schedule these processes, in parallel, on the various processors ...
2.01 - Kangwon
... When multiple users or multiple jobs running concurrently, resources must be allocated to each of them Many types of resources – Some (such as CPU cycles, main memory, and file storage) may have ...
... When multiple users or multiple jobs running concurrently, resources must be allocated to each of them Many types of resources – Some (such as CPU cycles, main memory, and file storage) may have ...
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 ...
11. Kernel Design
... Only for very short periods of time Now mostly in legacy drivers and in the virtual file system ...
... Only for very short periods of time Now mostly in legacy drivers and in the virtual file system ...
Abstract- This paper presents an introduction to the technology of
... Coarse-grained parallelism is one of the limitations of Beowulf, but the vastly improving networking speeds promise to reduce the interconnect- latency in future, and allow finer grained programs also to work. ...
... Coarse-grained parallelism is one of the limitations of Beowulf, but the vastly improving networking speeds promise to reduce the interconnect- latency in future, and allow finer grained programs also to work. ...
Windows 95/98/NT (Introduction)
... which is based on a flat, linear address space accessed using 32-bit addresses. The system allocates each process a unique virtual address space of 4 GB. The upper 2 GB is shared, while the lower 2 GB is private to the application. This virtual address space is divided into equal blocks (or pages). ...
... which is based on a flat, linear address space accessed using 32-bit addresses. The system allocates each process a unique virtual address space of 4 GB. The upper 2 GB is shared, while the lower 2 GB is private to the application. This virtual address space is divided into equal blocks (or pages). ...
Process Description and Control
... • Process Control Information – Scheduling and State Information This is information that is needed by the operating system to perform its scheduling function. Typical items of information: •Process state: defines the readiness of the process to be scheduled for execution (e.g., running, ready, wait ...
... • Process Control Information – Scheduling and State Information This is information that is needed by the operating system to perform its scheduling function. Typical items of information: •Process state: defines the readiness of the process to be scheduled for execution (e.g., running, ready, wait ...
Monitors
... Deadlock can arise if four conditions hold simultaneously. Mutual exclusion: only one process at a time can use a resource. Hold and wait: a process holding at least one resource is waiting to acquire additional resources held by other processes. No preemption: a resource can be released only volunt ...
... Deadlock can arise if four conditions hold simultaneously. Mutual exclusion: only one process at a time can use a resource. Hold and wait: a process holding at least one resource is waiting to acquire additional resources held by other processes. No preemption: a resource can be released only volunt ...
Concepts in Real-Time Operating Systems
... support for memory protection among tasks leads to a single address space for the tasks. Arguments for having only a single address space include simplicity, saving memory bits, and light weight system calls. For small embedded applications, the overhead of a few Kilo Bytes of memory per process can ...
... support for memory protection among tasks leads to a single address space for the tasks. Arguments for having only a single address space include simplicity, saving memory bits, and light weight system calls. For small embedded applications, the overhead of a few Kilo Bytes of memory per process can ...
Windows Server 2008
... Multiuser Systems • Cloud computing: providing scalable Web-based applications and services over the Internet that are used by clients through Web browsers • Microsoft describes three types of cloud models: – Private cloud – computing resources are kept within an organization and used exclusively b ...
... Multiuser Systems • Cloud computing: providing scalable Web-based applications and services over the Internet that are used by clients through Web browsers • Microsoft describes three types of cloud models: – Private cloud – computing resources are kept within an organization and used exclusively b ...
Slides for lecture 3
... Multiple background processes– in memory, running, but not on the display, and with limits ...
... Multiple background processes– in memory, running, but not on the display, and with limits ...
November 10 Lecture Slides
... Can simulate last two with first method by inserting appropriate control ...
... Can simulate last two with first method by inserting appropriate control ...
slides-3
... Multiple background processes– in memory, running, but not on the display, and with ...
... Multiple background processes– in memory, running, but not on the display, and with ...
Powerpoint format
... Named pipes can be created within programs by using a command: mknod ( “mypipe”, SIFIFO, 0 ); Once a named pipe is created, processes can open(), read() and write() them just like any other file. There is a difference however from normal files Operating Systems Workshop CIT, Arid Agriculture Univers ...
... Named pipes can be created within programs by using a command: mknod ( “mypipe”, SIFIFO, 0 ); Once a named pipe is created, processes can open(), read() and write() them just like any other file. There is a difference however from normal files Operating Systems Workshop CIT, Arid Agriculture Univers ...
12_Pthreads
... Thread Consequences • Because threads within the same process share resources: – Changes made by one thread to shared system resources (such as closing a file) will be seen by all other threads – Two pointers having the same value point to the same data – Reading and writing to the same memory loca ...
... Thread Consequences • Because threads within the same process share resources: – Changes made by one thread to shared system resources (such as closing a file) will be seen by all other threads – Two pointers having the same value point to the same data – Reading and writing to the same memory loca ...
