1.1

1.1

1. key words

   • processor
     • machine that processes something
   • MHz ,GHz, Hertz
     • mega hertz, giga hertz and hertz
   • instruction
   • execute
     • the corporation executed a series of financial
   • embedded system
     • an embedded system is a dedicated computer system designed for one or two specific functions.
   • clock speed
     • cache
       • a collection of item of the same type stored in a hidden pr inaccessible place
     • the operating speed of a computer or its microprocessor , expressed in cycles per second (MHz)
   • core
     • a multi-core processor is a single computing component with two or more independent processing unit called cores

2. what is the purpose of a processor?

   • the processor is the brains of a computer system. it processes data. carries out instructions (executes them). processors have a clock speed measured in hertz number of cycles per second

3. processor speed

   • measured in hertz (hz) typical speeds have spanned across MHz and GHz 1GHz processor executes 2 billion instructions per second 2GHz processor executes 2 billion per second

4. processor - cores

   • each processor has a core in which instructions are executed
   • processors can be multi-core , dual core, quad core and 8 core
   • each core executes instructions independently dual core may execute up to twice as many instructions per second

5. processsors -cache size

   • processors have cache - this is a very fast and usually a very small amopunt of memory on the processor chip
   • the cache acts as an intermediary between the processor and the main memory
   • as programs are executing - the cache holds commonly used instructions

6. what affects the performance

   • clock speed
     • doubling the clock speed will reduce the number of instructions executed per second
   • cores
     • quadrupling the number of cores may quadruple the number of instructions executed per second
   • cache size
     • increasing the cache size will reduce the number of the memory disk transfers and thus may speed up the processing of these instructions

7. embedded systems

   • a computer system that is made up of both hardware and software often known as firmware
   • usually for very specialised tasks