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Multitasking is a common feature of computer operating systems since at least the 1960s. It allows more efficient use of the computer hardware; when a program is waiting for some external event such as a user input or an input/output transfer with a peripheral to complete, the central processor can still be used with another program.
From the software standpoint, hardware support for multithreading is more visible to software, requiring more changes to both application programs and operating systems than multiprocessing. Hardware techniques used to support multithreading often parallel the software techniques used for computer multitasking. Thread scheduling is also a major ...
Concurrency is pervasive in computing, occurring from low-level hardware on a single chip to worldwide networks. Examples follow. At the programming language level: Channel; Coroutine; Futures and promises; At the operating system level: Computer multitasking, including both cooperative multitasking and preemptive multitasking
Bob Bemer used the term time-sharing in his 1957 article "How to consider a computer" in Automatic Control Magazine and it was reported the same year he used the term time-sharing in a presentation. [6] [8] [9] In a paper published in December 1958, W. F. Bauer wrote that "The computers would handle a number of problems concurrently ...
In the sense of "unit of execution", in some operating systems, a task is synonymous with a process [citation needed], and in others with a thread [citation needed].In non-interactive execution (batch processing), a task is a unit of execution within a job, [1] [2] with the task itself typically a process.
“Multitasking is less effective than solo-tasking,” licensed psychologist Jenna Brownfield tells Yahoo Life. “You can still get things done and be effective when multitasking, but it usually ...
Multithreading is similar in concept to preemptive multitasking but is implemented at the thread level of execution in modern superscalar processors. Simultaneous multithreading (SMT) is one of the two main implementations of multithreading, the other form being temporal multithreading (also known as super-threading).
A 3 GHz model of the Intel Pentium 4 processor that incorporates Hyper-Threading Technology [7]. Hyper-Threading Technology is a form of simultaneous multithreading technology introduced by Intel, while the concept behind the technology has been patented by Sun Microsystems.