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  2. Worst-case execution time - Wikipedia

    en.wikipedia.org/wiki/Worst-case_execution_time

    Measurement-based and hybrid approaches usually try to measure the execution times of short code segments on the real hardware, which are then combined in a higher level analysis. Tools take into account the structure of the software (e.g. loops, branches), to produce an estimate of the WCET of the larger program.

  3. Computer architecture - Wikipedia

    en.wikipedia.org/wiki/Computer_architecture

    Block diagram of a basic computer with uniprocessor CPU. Black lines indicate control flow, whereas red lines indicate data flow. Arrows indicate the direction of flow. In computer science and computer engineering, computer architecture is a description of the structure of a computer system made from component parts. [1]

  4. Execution unit - Wikipedia

    en.wikipedia.org/wiki/Execution_unit

    It may have its own internal control sequence unit (not to be confused with a CPU's main control unit), some registers, [2] and other internal units such as an arithmetic logic unit, [3] address generation unit, floating-point unit, load–store unit, branch execution unit [4] or other smaller and more specific components, and can be tailored ...

  5. IBM System/360 architecture - Wikipedia

    en.wikipedia.org/wiki/IBM_System/360_architecture

    The System light PoOps: 124 indicates that a meter is running, either due to CPU activity or due to I/O channel activity. The Test light PoOps : 124 indicates that certain operator controls are active, when certain facilities, e.g., INSTRUCTION STEP, have been used by a Diagnose instruction or when abnormal thermal conditions exist.

  6. Instruction set architecture - Wikipedia

    en.wikipedia.org/wiki/Instruction_set_architecture

    Some microcoded CPU designs with a writable control store use it to allow the instruction set to be changed (for example, the Rekursiv processor and the Imsys Cjip). [19] CPUs designed for reconfigurable computing may use field-programmable gate arrays (FPGAs). An ISA can also be emulated in software by an interpreter. Naturally, due to the ...

  7. Address generation unit - Wikipedia

    en.wikipedia.org/wiki/Address_generation_unit

    Intel's Nehalem microarchitecture contains multiple AGUs behind the CPU's reservation station.. The address generation unit (AGU), sometimes also called address computation unit (ACU), [1] is an execution unit inside central processing units (CPUs) that calculates addresses used by the CPU to access main memory.

  8. Heterogeneous System Architecture - Wikipedia

    en.wikipedia.org/wiki/Heterogeneous_System...

    The system architecture allows any accelerator, for instance a graphics processor, to operate at the same processing level as the system's CPU. Among its main features, HSA defines a unified virtual address space for compute devices: where GPUs traditionally have their own memory, separate from the main (CPU) memory, HSA requires these devices ...

  9. Comparison of instruction set architectures - Wikipedia

    en.wikipedia.org/wiki/Comparison_of_instruction...

    An instruction set architecture (ISA) is an abstract model of a computer, also referred to as computer architecture.A realization of an ISA is called an implementation.An ISA permits multiple implementations that may vary in performance, physical size, and monetary cost (among other things); because the ISA serves as the interface between software and hardware.