Figure 5.01 - UCSB Computer Science
... Create a number of threads in a pool where they await work Advantages: ...
... Create a number of threads in a pool where they await work Advantages: ...
Operating Systems must support GPU abstractions
... the frequency with which the system can collect and deliver mouse movements. In our experiments, significant GPU-work at high frame rates causes Windows 7 to be unresponsive for seconds at a time. To measure this phenomenon, we instrumented the OS to record the frequency of mouse events delivered th ...
... the frequency with which the system can collect and deliver mouse movements. In our experiments, significant GPU-work at high frame rates causes Windows 7 to be unresponsive for seconds at a time. To measure this phenomenon, we instrumented the OS to record the frequency of mouse events delivered th ...
Figure 5.01 - College of the Holy Cross
... Thread 2 still in running state (but not actually running!) Thread 2 needs action performed by Thread 1: Thread 2 goes into blocked state. Thread 1 starts running. Process B remains in running state. ...
... Thread 2 still in running state (but not actually running!) Thread 2 needs action performed by Thread 1: Thread 2 goes into blocked state. Thread 1 starts running. Process B remains in running state. ...
INF5070 – Media Storage and Distribution Systems
... exclusive: only one process at a time can use it, e.g., CPU shared: can be used by several concurrent processed, e.g., memory single: exists only once in the system, e.g., loudspeaker multiple: several within a system, e.g., CPUs in a multi-processor system ...
... exclusive: only one process at a time can use it, e.g., CPU shared: can be used by several concurrent processed, e.g., memory single: exists only once in the system, e.g., loudspeaker multiple: several within a system, e.g., CPUs in a multi-processor system ...
ch13
... (a) Unbuffered input. (b) Buffering in user space. (c) Buffering in the kernel followed by copying to user space. (d) Double buffering in the kernel. Tanenbaum, Modern Operating Systems 3 e, (c) 2008 Prentice-Hall, Inc. All rights reserved. 0-13-6006639 Operating System Concepts with Java – 7th Edit ...
... (a) Unbuffered input. (b) Buffering in user space. (c) Buffering in the kernel followed by copying to user space. (d) Double buffering in the kernel. Tanenbaum, Modern Operating Systems 3 e, (c) 2008 Prentice-Hall, Inc. All rights reserved. 0-13-6006639 Operating System Concepts with Java – 7th Edit ...
Structure of Operating Systems
... 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 creates the illusion that a process has its own proc ...
... 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 creates the illusion that a process has its own proc ...
Threads
... Linux refers to them as tasks rather than threads Thread creation is done through clone() system call clone() allows a child task to share the address space ...
... Linux refers to them as tasks rather than threads Thread creation is done through clone() system call clone() allows a child task to share the address space ...
2005-03-midterm.pdf
... As a virtual machine, an operating system provides an abstraction over the hardware by means of, for example, system calls. In this way, it provides a convenient way to program a machine without the need to know about hardware details. As a resource manager, it allows multiple processes (or users) t ...
... As a virtual machine, an operating system provides an abstraction over the hardware by means of, for example, system calls. In this way, it provides a convenient way to program a machine without the need to know about hardware details. As a resource manager, it allows multiple processes (or users) t ...
Notes on Operating Systems
... The important thing to notice is that at any given time, only one program is running1 . Sometimes this is the operating system, and at other times it is a user application. When a user application is running, the operating system loses its control over the machine. It regains control if the user ap ...
... The important thing to notice is that at any given time, only one program is running1 . Sometimes this is the operating system, and at other times it is a user application. When a user application is running, the operating system loses its control over the machine. It regains control if the user ap ...
Unit04_Software
... Provides a land for applications to reside – BIOS A platform for writing application programs ...
... Provides a land for applications to reside – BIOS A platform for writing application programs ...
Chapter 5
... • Kxx link in /etc/init.d/rccurrentrl.d/ and Sxx link in /etc/init.d/rcnewrl.d/ for the same service – Script in /etc/init.d/ is not called at all • Kxx link in /etc/init.d/rccurrentrl.d/ and no Sxx link in /etc/init.d/rcnewrl.d/ – Stop script in /etc/init.d/service • Sxx link in /etc/init.d/rcnewrl ...
... • Kxx link in /etc/init.d/rccurrentrl.d/ and Sxx link in /etc/init.d/rcnewrl.d/ for the same service – Script in /etc/init.d/ is not called at all • Kxx link in /etc/init.d/rccurrentrl.d/ and no Sxx link in /etc/init.d/rcnewrl.d/ – Stop script in /etc/init.d/service • Sxx link in /etc/init.d/rcnewrl ...
2_threads
... Processes send messages through an IPC facility Transfer information without shared variables Works over a network Harder to implement Maybe more overhead Less concurrency problems – Why?? ...
... Processes send messages through an IPC facility Transfer information without shared variables Works over a network Harder to implement Maybe more overhead Less concurrency problems – Why?? ...
OS course notes - CS
... The important thing to notice is that at any given time, only one program is running1 . Sometimes this is the operating system, and at other times it is a user application. When a user application is running, the operating system loses its control over the machine. It regains control if the user ap ...
... The important thing to notice is that at any given time, only one program is running1 . Sometimes this is the operating system, and at other times it is a user application. When a user application is running, the operating system loses its control over the machine. It regains control if the user ap ...
Xen and the Art of Virtualization
... services, the vast majority of which are small-scale and unpopular. In contrast, Xen is intended to scale to approximately 100 virtual machines running industry standard applications and services. Given these very different goals, it is instructive to contrast Denali’s design choices with our own pr ...
... services, the vast majority of which are small-scale and unpopular. In contrast, Xen is intended to scale to approximately 100 virtual machines running industry standard applications and services. Given these very different goals, it is instructive to contrast Denali’s design choices with our own pr ...
Xen and the Art of Virtualization
... services, the vast majority of which are small-scale and unpopular. In contrast, Xen is intended to scale to approximately 100 virtual machines running industry standard applications and services. Given these very different goals, it is instructive to contrast Denali’s design choices with our own pr ...
... services, the vast majority of which are small-scale and unpopular. In contrast, Xen is intended to scale to approximately 100 virtual machines running industry standard applications and services. Given these very different goals, it is instructive to contrast Denali’s design choices with our own pr ...
Java Threads
... Linux refers to them as tasks rather than threads Thread creation is done through clone() system call clone() allows a child task to share the address space ...
... Linux refers to them as tasks rather than threads Thread creation is done through clone() system call clone() allows a child task to share the address space ...
Input / Output
... 6. Run the interrupt service procedure. 7. Choose which process to run next. 8. Set up the MMU context for the process to run next. 9. Load the new process’ registers, including its PSW. 10. Start running the new process. ...
... 6. Run the interrupt service procedure. 7. Choose which process to run next. 8. Set up the MMU context for the process to run next. 9. Load the new process’ registers, including its PSW. 10. Start running the new process. ...
Linux+ Guide to Linux Certification Chapter One Introduction to Linux
... • Linux has firewall support directly built into the kernel • A proxy service requests Internet resources such as Web sites and FTP sites on behalf of the computer inside the company ...
... • Linux has firewall support directly built into the kernel • A proxy service requests Internet resources such as Web sites and FTP sites on behalf of the computer inside the company ...
Proceedings of the General Track: 2003 USENIX Annual Technical Conference
... can be applied to a system immediately without the need for down-time (scheduled or otherwise). This capability avoids a trade-off among availability and correctness, security, and better performance. Adaptive algorithms: For many OS resources, different algorithms perform better or worse under diff ...
... can be applied to a system immediately without the need for down-time (scheduled or otherwise). This capability avoids a trade-off among availability and correctness, security, and better performance. Adaptive algorithms: For many OS resources, different algorithms perform better or worse under diff ...
Practical Taint-Based Protection using Demand Emulation
... an amorphous collection of bits, which may be used in arbitrary roles: In a stack-smashing attack, the data composing a web request is made to include modifications to a server’s call stack that compromise the system. Viruses and trojans may be attached to applications or included with email, and th ...
... an amorphous collection of bits, which may be used in arbitrary roles: In a stack-smashing attack, the data composing a web request is made to include modifications to a server’s call stack that compromise the system. Viruses and trojans may be attached to applications or included with email, and th ...
O ti S t O ti S t Operating Systems Chapter 1
... What does the OS course contain? The course will start with an historical perspective of the evolution ...
... What does the OS course contain? The course will start with an historical perspective of the evolution ...
Power Point XP
... Can have long-running stateful handlers without freezes Scalable performance on multiple CPUs ...
... Can have long-running stateful handlers without freezes Scalable performance on multiple CPUs ...