WSO2006-overview-con..
... Allowing a single process to serve many clients, with no leaking of information between clients Labels and Event Processes in the Asbestos Operating System (UCLA, MIT, NYU) Enforce isolation between kernel modules (helps detect bugs, limit their damage) Mondrix: Memory Isolation for Linux using ...
... Allowing a single process to serve many clients, with no leaking of information between clients Labels and Event Processes in the Asbestos Operating System (UCLA, MIT, NYU) Enforce isolation between kernel modules (helps detect bugs, limit their damage) Mondrix: Memory Isolation for Linux using ...
Fundamentals
... Byte code files end with the .class file extension. The JVM is a program that emulates a microprocessor. The JVM executes instructions as they are read. JVM is often called an interpreter. Java is often referred to as an interpreted ...
... Byte code files end with the .class file extension. The JVM is a program that emulates a microprocessor. The JVM executes instructions as they are read. JVM is often called an interpreter. Java is often referred to as an interpreted ...
lec01 - CSE @ UCR
... Wait until the last couple of days to start a project We’ll have to do the crunch anyways, why do it early? The projects cannot be done in the last few days Repeat: The projects cannot be done in the last few days Each quarter groups learn that starting early meant finishing all of the projects on t ...
... Wait until the last couple of days to start a project We’ll have to do the crunch anyways, why do it early? The projects cannot be done in the last few days Repeat: The projects cannot be done in the last few days Each quarter groups learn that starting early meant finishing all of the projects on t ...
CS 153 Design of Operating Systems
... You are graded for how well your code works, not for how many hours you have put in or how many lines of code you wrote Debugging is integral process of development ...
... You are graded for how well your code works, not for how many hours you have put in or how many lines of code you wrote Debugging is integral process of development ...
Computer Science Homework 1
... place a link to the BlueJ IDE on your desktop. Now you should have the necessary software to start developing your own Java program, as we did in class. Step 3: Testing your installation by starting BlueJ (click on the BlueJ Desktop Icon). You might (but probably not) be asked which “Java Virtual Ma ...
... place a link to the BlueJ IDE on your desktop. Now you should have the necessary software to start developing your own Java program, as we did in class. Step 3: Testing your installation by starting BlueJ (click on the BlueJ Desktop Icon). You might (but probably not) be asked which “Java Virtual Ma ...
Introduction
... 1.1 What is an operating system 1.2 History of operating systems 1.3 The operating system zoo 1.4 Computer hardware review 1.5 Operating system concepts 1.6 System calls 1.7 Operating system structure ...
... 1.1 What is an operating system 1.2 History of operating systems 1.3 The operating system zoo 1.4 Computer hardware review 1.5 Operating system concepts 1.6 System calls 1.7 Operating system structure ...
COS 318: Operating Systems OS Structures and System Calls Kai Li
... behalf of users by messaging with the service processes Examples: Mach, Taos, L4, OS-X Pros? ...
... behalf of users by messaging with the service processes Examples: Mach, Taos, L4, OS-X Pros? ...
Mach: A System Software Kernel Abstract
... thought of as though they were capabilities to objects in an object-oriented system [6]. The act of sending a message (and perhaps receiving a reply) corresponds to a cross-domain procedure call in a capability based system such as Hydra [13] or StarOS [7]. ...
... thought of as though they were capabilities to objects in an object-oriented system [6]. The act of sending a message (and perhaps receiving a reply) corresponds to a cross-domain procedure call in a capability based system such as Hydra [13] or StarOS [7]. ...
pptx
... General-purpose operating systems must run efficiently on many different architectures. Multiprocessing Non-uniform memory access (NUMA) (Cache coherence?) ...
... General-purpose operating systems must run efficiently on many different architectures. Multiprocessing Non-uniform memory access (NUMA) (Cache coherence?) ...
COS 318: Operating Systems OS Structures and System Calls Prof. Margaret Martonosi
... Load and read system registers Change processor modes from kernel to user Change the voltage and frequency of processor Halt a processor Reset a processor Perform I/O operations ...
... Load and read system registers Change processor modes from kernel to user Change the voltage and frequency of processor Halt a processor Reset a processor Perform I/O operations ...
Operating System
... NOTE: There often exists a strong correlation between a function in the API and its associated system call within the kernel. In fact, many of the POSIX and Win32 APIs are similar to the native system calls provided by the UNIX, Linux, and Windows operating systems. ...
... NOTE: There often exists a strong correlation between a function in the API and its associated system call within the kernel. In fact, many of the POSIX and Win32 APIs are similar to the native system calls provided by the UNIX, Linux, and Windows operating systems. ...
Introduction - Stanford Secure Computer Systems Group
... • Protect mem. of one program from actions of another • Definitions - Address space: all memory locations a program can name - Virtual address: addresses in process’ address space - Physical address: address of real memory - Translation: map virtual to physical addresses ...
... • Protect mem. of one program from actions of another • Definitions - Address space: all memory locations a program can name - Virtual address: addresses in process’ address space - Physical address: address of real memory - Translation: map virtual to physical addresses ...
Chapter 2 Operating System Overview
... A process can be defined as: a program in execution an instance of a running program the entity that can be assigned to, and executed on, a processor a unit of activity characterized by a single sequential thread of execution, a current state, and an associated set of system resources ...
... A process can be defined as: a program in execution an instance of a running program the entity that can be assigned to, and executed on, a processor a unit of activity characterized by a single sequential thread of execution, a current state, and an associated set of system resources ...
Operating Systems I
... Maintains information about the files that are available on the system o location o size, type, and protections o what storage is still available ...
... Maintains information about the files that are available on the system o location o size, type, and protections o what storage is still available ...
Section 1.4
... and symbols that we can use to write a program • A programming language employs a set of rules that dictate how the words and symbols can be put together to form valid program statements • Java was created by Sun Microsystems, Inc. • It was introduced in 1995 and has become quite popular • It is an ...
... and symbols that we can use to write a program • A programming language employs a set of rules that dictate how the words and symbols can be put together to form valid program statements • Java was created by Sun Microsystems, Inc. • It was introduced in 1995 and has become quite popular • It is an ...
DOS (“Disk Operating System”)
... • ‘ls’ is just another program/script • When we type ‘ls’, how does the system know where that command is? – ‘PATH’ variable ...
... • ‘ls’ is just another program/script • When we type ‘ls’, how does the system know where that command is? – ‘PATH’ variable ...
Operating System organization
... • Maintains internal data structures for queuing up requests that cannot be replied to immediately • No sharing of data with requesting processes • Status information encoded in message content • Reply to specific socket of requester CS-3013 & CS-502, Summer 2006 ...
... • Maintains internal data structures for queuing up requests that cannot be replied to immediately • No sharing of data with requesting processes • Status information encoded in message content • Reply to specific socket of requester CS-3013 & CS-502, Summer 2006 ...
Operating-System Structure
... approach in that the primary module has only core functions and knowledge of how to load and communicate with other modules; but it is more efficient, because modules do not need to invoke message passing in order to communicate. ...
... approach in that the primary module has only core functions and knowledge of how to load and communicate with other modules; but it is more efficient, because modules do not need to invoke message passing in order to communicate. ...
Processing in Java
... that need to be imported in order for the program to be able to use all of Processing’s functionality • The basic Processing functions are defined in processing.core • The other libraries are mostly for creating and managing windows and interface events • Many processing sketches actually don’t need ...
... that need to be imported in order for the program to be able to use all of Processing’s functionality • The basic Processing functions are defined in processing.core • The other libraries are mostly for creating and managing windows and interface events • Many processing sketches actually don’t need ...
operating system
... When the computer is turned on, the CPU counter is set to the first instruction of this bootstrap program and executes the instructions in this program. The purpose is to load the rest of the operation system stored in the hard ...
... When the computer is turned on, the CPU counter is set to the first instruction of this bootstrap program and executes the instructions in this program. The purpose is to load the rest of the operation system stored in the hard ...
ppt
... Goals and criteria FCFS, RR, Priority, SJF, etc. Multi-level scheduling (later) Rate monotonic, Earliest Deadline First – (for real time problems) ...
... Goals and criteria FCFS, RR, Priority, SJF, etc. Multi-level scheduling (later) Rate monotonic, Earliest Deadline First – (for real time problems) ...
System Software
... b) Saving the state of a process and loading the state of another process c) Switching from one Multiple Simulation to the next ...
... b) Saving the state of a process and loading the state of another process c) Switching from one Multiple Simulation to the next ...
Javascript
... "Compiled language" means the source code of the program is translated (compiled) into machinelanguage (composed only of 0's and 1's) before use. When it is time to run the program, the translated version is used by the computer instead of the original source code. Unless you are the programmer, you ...
... "Compiled language" means the source code of the program is translated (compiled) into machinelanguage (composed only of 0's and 1's) before use. When it is time to run the program, the translated version is used by the computer instead of the original source code. Unless you are the programmer, you ...
Protection in General-Purpose Operating Systems
... Segmentation divides a program into separate pieces. Each piece has a logical unity, a relationship among all of its code or data value. Segmentation was developed as a feasible means to have the effect of an unbounded number of base/bounds registers: a program could be divided into many pieces havi ...
... Segmentation divides a program into separate pieces. Each piece has a logical unity, a relationship among all of its code or data value. Segmentation was developed as a feasible means to have the effect of an unbounded number of base/bounds registers: a program could be divided into many pieces havi ...
Library (computing)
In computer science, a library is a collection of non-volatile resources used by computer programs, often to develop software. These may include configuration data, documentation, help data, message templates, pre-written code and subroutines, classes, values or type specifications. In IBM's OS/360 and its successors they are referred to as partitioned data sets.In computer science, a library is a collection of implementations of behavior, written in terms of a language, that has a well-defined interface by which the behavior is invoked. This means that as long as a higher level program uses a library to make system calls, it does not need to be re-written to implement those system calls over and over again. In addition, the behavior is provided for reuse by multiple independent programs. A program invokes the library-provided behavior via a mechanism of the language. For example, in a simple imperative language such as C, the behavior in a library is invoked by using C's normal function-call. What distinguishes the call as being to a library, versus being to another function in the same program, is the way that the code is organized in the system. Library code is organized in such a way that it can be used by multiple programs that have no connection to each other, while code that is part of a program is organized to only be used within that one program. This distinction can gain a hierarchical notion when a program grows large, such as a multi-million-line program. In that case, there may be internal libraries that are reused by independent sub-portions of the large program. The distinguishing feature is that a library is organized for the purposes of being reused by independent programs or sub-programs, and the user only needs to know the interface, and not the internal details of the library.The value of a library is the reuse of the behavior. When a program invokes a library, it gains the behavior implemented inside that library without having to implement that behavior itself. Libraries encourage the sharing of code in a modular fashion, and ease the distribution of the code. The behavior implemented by a library can be connected to the invoking program at different program lifecycle phases. If the code of the library is accessed during the build of the invoking program, then the library is called a static library. An alternative is to build the executable of the invoking program and distribute that, independently from the library implementation. The library behavior is connected after the executable has been invoked to be executed, either as part of the process of starting the execution, or in the middle of execution. In this case the library is called a dynamic library. A dynamic library can be loaded and linked as part of preparing a program for execution, by the linker. Alternatively, in the middle of execution, an application may explicitly request that a module be loaded.Most compiled languages have a standard library although programmers can also create their own custom libraries. Most modern software systems provide libraries that implement the majority of system services. Such libraries have commoditized the services which a modern application requires. As such, most code used by modern applications is provided in these system libraries.