What is an Operating System?
... After I/O starts, control returns to user program without waiting for I/O completion System call – request to the operating system to allow user to wait for I/O completion Device-status table contains entry for each I/O device indicating its type, address, and state Operating system indexes ...
... After I/O starts, control returns to user program without waiting for I/O completion System call – request to the operating system to allow user to wait for I/O completion Device-status table contains entry for each I/O device indicating its type, address, and state Operating system indexes ...
204341 Operating Systems
... Systems generally first distinguish among users, to determine who can do what User identities (user IDs, security IDs) include name and numerical ID – Numerical IDs are unique, one per user. User ID then associated with all files, processes of that user to determine access control Group iden ...
... Systems generally first distinguish among users, to determine who can do what User identities (user IDs, security IDs) include name and numerical ID – Numerical IDs are unique, one per user. User ID then associated with all files, processes of that user to determine access control Group iden ...
Benu: Operating System Increments for Embedded
... code (one in assembly and one in C) and one with shell script used for compiling. The assembly code is small, but it is required for processor initialization (stack pointer and status register). The assembler then transfers control to a function written in C. A single function is placed in a C file, ...
... code (one in assembly and one in C) and one with shell script used for compiling. The assembly code is small, but it is required for processor initialization (stack pointer and status register). The assembler then transfers control to a function written in C. A single function is placed in a C file, ...
Lecture 1 - inst.eecs.berkeley.edu
... – Does the programmer need to write a single program that performs many independent activities? – Does every program have to be altered for every ...
... – Does the programmer need to write a single program that performs many independent activities? – Does every program have to be altered for every ...
CPU Scheduling
... • CPU scheduling more complex when multiple CPUs are available • Homogeneous processors within a multiprocessor • Asymmetric multiprocessing – only one processor accesses the system data structures, alleviating the need for data sharing • Symmetric multiprocessing (SMP) – each processor is selfsched ...
... • CPU scheduling more complex when multiple CPUs are available • Homogeneous processors within a multiprocessor • Asymmetric multiprocessing – only one processor accesses the system data structures, alleviating the need for data sharing • Symmetric multiprocessing (SMP) – each processor is selfsched ...
Synchronization
... 3. Scheduler switches to process B. 4. Process B reads in, stores in local var slot. 5. Process B stores filename in slot 7 (slot). 6. Process B updates in to be 8. 7. Scheduler eventually switches to process A. 8. Process A writes filename in slot 7 (slot). 9. Process A computes in = slot + 1. 10. ...
... 3. Scheduler switches to process B. 4. Process B reads in, stores in local var slot. 5. Process B stores filename in slot 7 (slot). 6. Process B updates in to be 8. 7. Scheduler eventually switches to process A. 8. Process A writes filename in slot 7 (slot). 9. Process A computes in = slot + 1. 10. ...
Module 4: Processes
... bounded-buffer assumes that there is a fixed buffer size (consumer must wait if the buffer is empty; producer must wait if the buffer is full) ...
... bounded-buffer assumes that there is a fixed buffer size (consumer must wait if the buffer is empty; producer must wait if the buffer is full) ...
Glossary of A+ Terms
... Backup Operator — A Windows 2000/XP user account that can back up and restore any files on the system regardless of its having access to these files. bandwidth — In relation to analog communication, the range of frequencies that a communications channel or cable can carry. In general use, the term r ...
... Backup Operator — A Windows 2000/XP user account that can back up and restore any files on the system regardless of its having access to these files. bandwidth — In relation to analog communication, the range of frequencies that a communications channel or cable can carry. In general use, the term r ...
RootkitRevealer v1.71 - Big
... system API discrepancies that may indicate the presence of a user-mode or kernel-mode rootkit. RootkitRevealer successfully detects all persistent rootkits published at www.rootkit.com, including AFX, Vanquish and HackerDefender (note: RootkitRevealer is not intended to detect rootkits like Fu that ...
... system API discrepancies that may indicate the presence of a user-mode or kernel-mode rootkit. RootkitRevealer successfully detects all persistent rootkits published at www.rootkit.com, including AFX, Vanquish and HackerDefender (note: RootkitRevealer is not intended to detect rootkits like Fu that ...
Lecture3-os-support
... Case Study: Solaris™ 10 OS • Solaris is often used on server systems • Known for its good scalability, good load balancing and interactive performance • We will look at Solaris runqueues and how they are managed – A runqueue is a scheduling queue – A structure containing pointers to runnable thread ...
... Case Study: Solaris™ 10 OS • Solaris is often used on server systems • Known for its good scalability, good load balancing and interactive performance • We will look at Solaris runqueues and how they are managed – A runqueue is a scheduling queue – A structure containing pointers to runnable thread ...
Module 7: Process Synchronization
... an integer count that keeps track of the number of full buffers. Initially, count is set to 0. It is incremented by the producer after it produces a new buffer and is decremented by the consumer after it consumes a buffer. (reference to Section 3.4.1, power point 27 --31) ...
... an integer count that keeps track of the number of full buffers. Initially, count is set to 0. It is incremented by the producer after it produces a new buffer and is decremented by the consumer after it consumes a buffer. (reference to Section 3.4.1, power point 27 --31) ...
Lecture 15
... scheduling Non-preemptive scheduling: Each process completes its full CPU burst cycle before the next process is scheduled. No time slicing or CPU stealing occurs. Once a process has control of the CPU, it keeps control until it gives it up (e.g. to wait for I/O or to terminate). Works OK ...
... scheduling Non-preemptive scheduling: Each process completes its full CPU burst cycle before the next process is scheduled. No time slicing or CPU stealing occurs. Once a process has control of the CPU, it keeps control until it gives it up (e.g. to wait for I/O or to terminate). Works OK ...
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 ...
Windows Server 2008 - Information Technology of Falcon High School
... • Type 1 hypervisor runs directly on the host computer’s hardware and controls and monitors guest OSs • Type 2 hypervisor is installed in a general-purpose host OS and the host OS accesses host hardware on behalf of the guest OS • A virtual disk consists of files residing on the host computer that r ...
... • Type 1 hypervisor runs directly on the host computer’s hardware and controls and monitors guest OSs • Type 2 hypervisor is installed in a general-purpose host OS and the host OS accesses host hardware on behalf of the guest OS • A virtual disk consists of files residing on the host computer that r ...
ppt - Computer Science Division
... – Does the programmer need to write a single program that performs many independent activities? – Does every program have to be altered for every ...
... – Does the programmer need to write a single program that performs many independent activities? – Does every program have to be altered for every ...
kubi-cs162f05lec01
... – Does the programmer need to write a single program that performs many independent activities? – Does every program have to be altered for every ...
... – Does the programmer need to write a single program that performs many independent activities? – Does every program have to be altered for every ...
Chapter 21 - Linux Operating System
... executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has completed and control is about to be returned to user mode 2. The second technique applies to critical sections that occur in an interrupt service routines – By us ...
... executing a kernel system service routine, the kernel’s need_resched flag is set so that the scheduler will run once the system call has completed and control is about to be returned to user mode 2. The second technique applies to critical sections that occur in an interrupt service routines – By us ...
Real-time Operating Systems
... – executes periodically – executes when state of any thread changes ...
... – executes periodically – executes when state of any thread changes ...
Chapter 3: Processes
... bounded-buffer assumes that there is a fixed buffer size (consumer must wait if the buffer is empty; producer must wait if the buffer is full)" ...
... bounded-buffer assumes that there is a fixed buffer size (consumer must wait if the buffer is empty; producer must wait if the buffer is full)" ...
ppt
... • Results: L3 and L4: second-generation microkernel based operating systems • Many clever optimizations, but no single “silver bullet” ...
... • Results: L3 and L4: second-generation microkernel based operating systems • Many clever optimizations, but no single “silver bullet” ...
Operating Systems (ECS 150) Spring 2011
... broad understanding of components of modern high performance operating system, and theoretical issues associated with building operating system; Implemented fragments of operating system components, polices, mechanisms, etc.; and develop intuition for which system approaches work, and which do ...
... broad understanding of components of modern high performance operating system, and theoretical issues associated with building operating system; Implemented fragments of operating system components, polices, mechanisms, etc.; and develop intuition for which system approaches work, and which do ...