Definition

1. Noun:
   • (Computer Science) The process of carrying out an instruction by a computer: This term refers to the specific action performed by a computer's central processing unit (CPU) when it follows a single command from a program. It is a fundamental step in the fetch-decode-execute cycle.

Usage Examples

• Noun:
  • The speed of instruction execution directly affects a processor's overall performance.
  • Modern CPUs use pipelining to overlap the fetch, decode, and instruction execution stages.
  • A runtime error occurs during the instruction execution if the data is invalid.

Advanced Usage

• "cycle of instruction execution": Refers to the complete sequence of fetching, decoding, and executing a single instruction.

  • Optimizing the cycle of instruction execution is a key goal in microprocessor design.

• "out-of-order instruction execution": A performance feature where a CPU executes instructions in an order different from the program to avoid delays.

  • Out-of-order instruction execution allows the processor to make better use of its resources.

Variants and Related Words

• Execute (verb): To carry out an instruction or program.

  • The CPU will execute the next command.

• Instruction (noun): A single operation command for a computer.

  • The ADD instruction tells the processor to add two numbers.

• Instruction cycle (noun): The complete process of fetching, decoding, and executing an instruction.

  • The instruction cycle is repeated billions of times per second.

Synonyms

• Command execution
• Instruction processing

Related Phrases

• Instruction execution unit: The part of a processor responsible for carrying out operations.

  • The arithmetic logic unit (ALU) is a core component of the instruction execution unit.

• Instruction execution time: The time required to complete a single instruction.

  • Reducing instruction execution time was a major breakthrough.

Noun

1. (computer science) the process of carrying out an instruction by a computer