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  2. Multithreading (computer architecture) - Wikipedia

    en.wikipedia.org/wiki/Multithreading_(computer...

    Conceptually, it is similar to cooperative multi-tasking used in real-time operating systems, in which tasks voluntarily give up execution time when they need to wait upon some type of event. This type of multithreading is known as block, cooperative or coarse-grained multithreading.

  3. Barrel processor - Wikipedia

    en.wikipedia.org/wiki/Barrel_processor

    One of the earliest examples of a barrel processor was the I/O processing system in the CDC 6000 series supercomputers. These executed one instruction (or a portion of an instruction) from each of 10 different virtual processors (called peripheral processors or PPs) before returning to the first processor. [1]

  4. Real-time computing - Wikipedia

    en.wikipedia.org/wiki/Real-time_computing

    Soft real-time systems are typically used to solve issues of concurrent access and the need to keep a number of connected systems up-to-date through changing situations. Some examples of soft real-time systems: Software that maintains and updates the flight plans for commercial airliners. The flight plans must be kept reasonably current, but ...

  5. Simultaneous multithreading - Wikipedia

    en.wikipedia.org/wiki/Simultaneous_multithreading

    Coarse-grain multithreading is more common for less context switch between threads. For example, Intel's Montecito processor uses coarse-grained multithreading, while Sun's UltraSPARC T1 uses fine-grained multithreading. For those processors that have only one pipeline per core, interleaved multithreading is the only possible way, because it ...

  6. Computer multitasking - Wikipedia

    en.wikipedia.org/wiki/Computer_multitasking

    In the early days of computing, CPU time was expensive, and peripherals were very slow. When the computer ran a program that needed access to a peripheral, the central processing unit (CPU) would have to stop executing program instructions while the peripheral processed the data.

  7. Single instruction, multiple threads - Wikipedia

    en.wikipedia.org/wiki/Single_instruction...

    Single instruction, multiple threads (SIMT) is an execution model used in parallel computing where single instruction, multiple data (SIMD) is combined with multithreading. It is different from SPMD in that all instructions in all "threads" are executed in lock-step.

  8. Concurrent computing - Wikipedia

    en.wikipedia.org/wiki/Concurrent_computing

    For example, concurrent processes can be executed on one core by interleaving the execution steps of each process via time-sharing slices: only one process runs at a time, and if it does not complete during its time slice, it is paused, another process begins or resumes, and then later the original process is resumed. In this way, multiple ...

  9. pSOS (real-time operating system) - Wikipedia

    en.wikipedia.org/wiki/PSOS_(real-time_operating...

    In July 1994, ISI acquired Digital Research's modular real-time multi-tasking operating system FlexOS from Novell. [1] In 1995, ISI offered a pSOSystem/NEST package for Novell Embedded Systems Technology (NEST). [2] [1] In February 2000, ISI was acquired by Wind River Systems, the originators of the rival RTOS VxWorks. Despite initial reports ...

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